Instantaneous phase tracking in single sideband systems

Claim 2

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: first means, connected to said single sideband input wave for generating a delayed replica of said single sideband input wave further subject to rapid phase jitter; and second means, connected to said first means, for deriving the amount of phase jitter present in said delayed replica of said single sideband input wave, said second means including demodulation and detection means to provide in-phase and quadrature phase single sideband components and a detected baseband data waveform and combining means for algebraically combining said in-phase demodulated component, said quadrature phase demodulated component, and said baseband data waveform, to obtain said phase jitter amount, said second means further cancelling the derived phase jitter from said delayed replica of said single sideband input wave without further delay with respect to said delayed replica of said single sideband input wave.

Claim 3

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: demodulating means, connected to said single sideband input wave, for generating a delayed replica of said single sideband input wave, and for generating an in-phase demodulated component a quadrature demodulated component, and a baseband data waveform from said delayed replica of said single sideband input wave, without further delay with respect to said delayed replica of said single sideband input wave; combining means, connected to said demodulating means, for deriving the amount of phase jitter present in said delayed replica of said single sideband input wave, by combining said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform, the amount of phase jitter being derived without delay with respect to said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform; and feedback means connected to said combining means and said, demodulating means, for cancelling the derived phase jitter from said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform.

Claim 4

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: demodulating means, connected to said single sideband input wave, for generating a delayed replica of said single sideband input wave, and for generating an in-phase demodulated component a quadrature demodulated component, and a baseband data waveform from said delayed replica of said single sideband input wave, without further delay with respect to said delayed replica of said single sideband input wave; combining means, connected to said demodulating means, for deriving the amount of phase jitter present in said delayed replica of said single sideband input wave, by combining said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform, the amount of phase jitter being derived without delay with respect to said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform; and feedback means connected to said combining means and said, demodulating means, for cancelling the derived phase jitter from said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform.

Claim 5

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: means, connected to said single sideband input wave, for generating a delayed replica of said single sideband input wave further subject to rapid phase jitter; a local oscillator for generating a local oscillator wave at the output thereof, the phase of said local oscillator wave being adjustable by a phase error signal applied to the input thereof; and demodulating, detecting and combining means connected to said delayed replica generating means and the input and output of said local oscillator for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said delayed replica of said single sideband input wave and being generated without delay with respect to said local oscillator from demodulated in-phase and quadrature phase single sideband components and a detected baseband data wavform, by algebraically combining said in-phase demodulated component, said quadrature phase demodulated component, and said baseband data waveform, whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 6

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: means, connected to said single sideband input wave, for generating a delayed replica of said single sideband input wave further subject to rapid phase jitter; a local oscillator for generating a local oscillator wave at the output thereof, the phase of said local oscillator wave being adjustable by a phase error signal applied to the input thereof; and demodulating, detecting and combining means connected to said delayed replica generating means and the input and output of said local oscillator for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said delayed replica of said single sideband input wave and being generated without delay with respect to said local oscillator from demodulated in-phase and quadrature phase single sideband components and a detected baseband data wavform, by algebraically combining said in-phase demodulated component, said quadrature phase demodulated component, and said baseband data waveform, whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 7

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: a local oscillator for generating a local oscillator wave, the phase of said local oscillator wave being adjustable; demodulating means, connected to said single sideband input wave and said local oscillator for generating an in-phase demodulated component of said single sideband input wave, a quadrature demodulated component of said single sideband input wave, and a baseband data waveform of said single sideband input wave, without delay with respect to said local oscillator wave, by combining said local oscillator wave, and said single sideband input wave; and combining means, connected to said demodulating means, and said local oscillator, for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said single sideband input wave and being generated without delay with respect to said local oscillator wave by combining said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform; whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 8

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: a local oscillator for generating a local oscillator wave, the phase of said local oscillator wave being adjustable; demodulating means, connected to said single sideband input wave and said local oscillator for generating an in-phase demodulated component of said single sideband input wave, a quadrature demodulated component of said single sideband input wave, and a baseband data waveform of said single sideband input wave, without delay with respect to said local oscillator wave, by combining said local oscillator wave, and said single sideband input wave; and combining means, connected to said demodulating means, and said local oscillator, for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said single sideband input wave and being generated without delay with respect to said local oscillator wave by combining said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform; whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 9

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave, and a delayed replica of said single sideband input wave with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; means connected to said Hilbert transform generating means for deriving the amount of phase jitter present in said delayed replica of said single sideband input wave without further delay with respect to said delayed replica of said single sideband input wave and for cancelling the derived phase jitter from said delayed replica of said single sideband input wave.

Claim 10

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave, and a delayed replica of said single sideband input wave with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; means connected to said Hilbert transform generating means for deriving the amount of phase jitter present in said delayed replica of said single sideband input wave without further delay with respect to said delayed replica of said single sideband input wave and for cancelling the derived phase jitter from said delayed replica of said single sideband input wave.

Claim 11

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; demodulating means connected to said Hilbert transform generating means, for generating an in-phase demodulated component, a quadrature demodulated component, and a baseband data waveform from the Hilbert transform of said single sideband input wave and the delayed replica of said single sideband input wave, without further delay with respect to the delayed replica of said single sideband input wave; combining means, connected to said demodulating means, for deriving the amount of phase jitter present in the delayed replica of said single sideband input wave, by combining said in-phase demodulated component, said quadrature demodulated component, and said baseband data waveform, the amount of phase jitter being derived without further delay with respect to said in-phase demodulated component, said quadrature demodulated component, said baseband data waveform; and feedback means connected to said combining means and said demodulating means, for cancelling the derived phase jitter from said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform.

Claim 12

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; demodulating means connected to said Hilbert transform generating means, for generating an in-phase demodulated component, a quadrature demodulated component, and a baseband data waveform from the Hilbert transform of said single sideband input wave and the delayed replica of said single sideband input wave, without further delay with respect to the delayed replica of said single sideband input wave; combining means, connected to said demodulating means, for deriving the amount of phase jitter present in the delayed replica of said single sideband input wave, by combining said in-phase demodulated component, said quadrature demodulated component, and said baseband data waveform, the amount of phase jitter being derived without further delay with respect to said in-phase demodulated component, said quadrature demodulated component, said baseband data waveform; and feedback means connected to said combining means and said demodulating means, for cancelling the derived phase jitter from said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform.

Claim 13

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave, and a delayed replica of said single sideband input wave, with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; a local oscillator for generating a local oscillator wave, the phase of said local oscillator wave being adjustable; and combining means, connected to said Hilbert transform generating means and said local oscillator, for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said single sideband input wave and being generated without delay with respect to said local oscillator wave by combining said local oscillator wave, the delayed replica of said single sideband input wave and the Hilbert transform of said single sideband input wave; whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 14

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave, and a delayed replica of said single sideband input wave, with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; a local oscillator for generating a local oscillator wave, the phase of said local oscillator wave being adjustable; and combining means, connected to said Hilbert transform generating means and said local oscillator, for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said single sideband input wave and being generated without delay with respect to said local oscillator wave by combining said local oscillator wave, the delayed replica of said single sideband input wave and the Hilbert transform of said single sideband input wave; whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 15

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; a local oscillator for generating a local oscillator wave, the phase of said local oscillator wave being adjustable; demodulating means connected to said Hilbert transform generating means and said local oscillator, for generating an in-phase demodulated component, a quadrature demodulated component, and a baseband data waveform from the Hilbert transform of said single sideband input wave and the delayed replica of said single sideband input wave, without delay with respect to said local oscillator wave, by combining the delayed replica of said single sideband input wave with the Hilbert transform of said single sideband wave and said local oscillator wave; and combining means, connected to said demodulating means, for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said single sideband input wave and being generated without delay with respect to said local oscillator wave by combining said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform; whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 16

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; a local oscillator for generating a local oscillator wave, the phase of said local oscillator wave being adjustable; demodulating means connected to said Hilbert transform generating means and said local oscillator, for generating an in-phase demodulated component, a quadrature demodulated component, and a baseband data waveform from the Hilbert transform of said single sideband input wave and the delayed replica of said single sideband input wave, without delay with respect to said local oscillator wave, by combining the delayed replica of said single sideband input wave with the Hilbert transform of said single sideband wave and said local oscillator wave; and combining means, connected to said demodulating means, for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said single sideband input wave and being generated without delay with respect to said local oscillator wave by combining said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform; whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 17

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: means, connected to said single sideband input wave, for generating a delayed replica of said single sideband input wave further subject to rapid phase jitter; a local oscillator for generating a local oscillator wave at the output thereof, the phase of said local oscillator wave being adjustable by a phase error signal applied to the input thereof; and a post oscillator feedback loop from demodulated in-phase and quadrature phase single sideband components and a detected baseband data waveform connected to said delayed replica of said single sideband input wave and the input and output of said local oscillator, for generating a phase error signal representing the amount of phase jitter present in said delayed replica of said single sideband input wave, said phase error signal generated by algebraically combining said in-phase demodulated component, said quadrature phase demodulated component, and said baseband data waveform, and for feeding back said phase error signal to the input of said local oscillator, the generation of said phase error signal by said post-oscillator feedback loop operating without delay with respect to said local oscillator wave, whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 18

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: means, connected to said single sideband input wave, for generating a delayed replica of said single sideband input wave further subject to rapid phase jitter; a local oscillator for generating a local oscillator wave at the output thereof, the phase of said local oscillator wave being adjustable by a phase error signal applied to the input thereof; and a post oscillator feedback loop from demodulated in-phase and quadrature phase single sideband components and a detected baseband data waveform connected to said delayed replica of said single sideband input wave and the input and output of said local oscillator, for generating a phase error signal representing the amount of phase jitter present in said delayed replica of said single sideband input wave, said phase error signal generated by algebraically combining said in-phase demodulated component, said quadrature phase demodulated component, and said baseband data waveform, and for feeding back said phase error signal to the input of said local oscillator, the generation of said phase error signal by said post-oscillator feedback loop operating without delay with respect to said local oscillator wave, whereby the phase of said local oscillator wave is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 19

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; a local oscillator for generating a local oscillator wave, the phase of said local oscillator wave being adjustable; and a post oscillator feedback loop including demodulating, detecting and combining means connected to said Hilbert transform generating means and said local oscillator, for generating a phase error signal representing the amount of phase jitter present in said single sideband input wave, said phase error signal generated from demodulated in-phase and quadrature phase single sideband components and a detected baseband data waveform by algebraically combining said in-phase demodulated component, said quadrature phase demodulated component, and said baseband data waveform, and for feeding back said phase error signal to said local oscillator, the generation of said phase error signal by the post-oscillator feedback loop operating without delay with respect to said local oscillator wave.

Claim 20

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: Hilbert transform generating means connected to said single sideband input wave for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, with no delay between the delayed replica of the single sideband input wave and the Hilbert transform of the single sideband input wave; a local oscillator for generating a local oscillator wave, the phase of said local oscillator wave being adjustable; and a post oscillator feedback loop including demodulating, detecting and combining means connected to said Hilbert transform generating means and said local oscillator, for generating a phase error signal representing the amount of phase jitter present in said single sideband input wave, said phase error signal generated from demodulated in-phase and quadrature phase single sideband components and a detected baseband data waveform by algebraically combining said in-phase demodulated component, said quadrature phase demodulated component, and said baseband data waveform, and for feeding back said phase error signal to said local oscillator, the generation of said phase error signal by the post-oscillator feedback loop operating without delay with respect to said local oscillator wave.

Claim 32

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: a Hilbert splitter connected to said single sideband input wave, for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, said Hilbert transform and said delayed replica being generated in synchronization with one another, a local oscillator for generating local oscillator waves including an in-phase local oscillator wave and a quadrature local oscillator wave, the phase of said local oscillator waves being adjustable; demodulating means, connected to said Hilbert splitter and said local oscillator, for generating an in-phase demodulated component, a quadrature demodulated component and a baseband data waveform from said delayed replica of said single sideband input wave, without delay with respect to said local oscillator waves by combining said local oscillator waves, said delayed replica of said single sideband input wave and said Hilbert transform; and combining means, connected to said demodulating means, for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said delayed replica of said single sideband input wave and being generated without delay with respect to said local oscillator waves by combining said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform; whereby the phases of said local oscillator waves are rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 33

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: a Hilbert splitter connected to said single sideband input wave, for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, said Hilbert transform and said delayed replica being generated in synchronization with one another, a local oscillator for generating local oscillator waves including an in-phase local oscillator wave and a quadrature local oscillator wave, the phase of said local oscillator waves being adjustable; demodulating means, connected to said Hilbert splitter and said local oscillator, for generating an in-phase demodulated component, a quadrature demodulated component and a baseband data waveform from said delayed replica of said single sideband input wave, without delay with respect to said local oscillator waves by combining said local oscillator waves, said delayed replica of said single sideband input wave and said Hilbert transform; and combining means, connected to said demodulating means, for sending a phase error signal to said local oscillator, said phase error signal representing the amount of phase jitter present in said delayed replica of said single sideband input wave and being generated without delay with respect to said local oscillator waves by combining said in-phase demodulated component, said quadrature demodulated component and said baseband data waveform; whereby the phases of said local oscillator waves are rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 34

The apparatus of claim 22 wherein said demodulating means includes: a first multiplier, for multiplying said delayed replica of said single sideband input wave by said in-phase local oscillator wave, a second multiplier, for multiplying said Hilbert transform by said quadrature local oscillator wave, and a first subtractor for subtracting the output of said second multiplier from the output of said first multiplier to obtain said in-phase demodulated component.

Claim 35

The apparatus of claim 22 wherein said demodulating means includes: a third multiplier, for multiplying said delayed replica of said single sideband input wave by said quadrature local oscillator wave, a fourth multiplier, for multiplying said Hilbert transform by said in-phase local oscillator wave, and a summer/inverter for adding the output of said third multiplier to the output of said fourth multiplier and inverting the result, to obtain said quadrature demodulated component.

Claim 36

The apparatus of claim 23 wherein said demodulating means further includes: a detector connected to the output of said first subtractor, for obtaining said baseband data waveform from said in-phase demodulated component.

Claim 37

The apparatus of claim 22 wherein said combining means comprises: a second subtractor for subtracting said baseband data waveform from said in-phase demodulated wave, and a first divider, for dividing the output of said second subtractor by said quadrature demodulated wave to obtain said phase error signal.

Claim 38

The apparatus of claim 22 wherein said combining means is a function generator, for generating said phase error signal by generating the smaller of the two values of the function ##EQU8## where x(t) is said in-phase demodulated component, y(t) is said quadrature demodulated component, and f(t) is said baseband data waveform.

Claim 39

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: a Hilbert splitter connected to said single sideband input wave, for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, said Hilbert transform and said delayed replica of said single sideband input wave being generated in synchronization with one another, a local oscillator for generating local oscillator waves including an in-phase local oscillator wave and a quadrature local oscillator wave, the phase of said local oscillator waves being adjustable; first, second, third and fourth multipliers connected to said Hilbert splitter and said local oscillator; said first multiplier for multiplying said delayed replica of said single sideband input wave by said in-phase local oscillator wave, said second multiplier for multiplying said Hilbert transform by said quadrature local oscillator wave, said third multiplier for multiplying said delayed replica of said single sideband input wave by said quadrature local oscillator wave, said fourth multiplier for multiplying said Hilbert transform by said in-phase local oscillator wave, a first subtractor for subtracting the output of said second multiplier from the output of said first multiplier, a first summer/inverter for adding the output of said third multiplier to the output of said fourth multiplier and inverting the result, a detector connected to the output of said first subtractor, a second subtractor for subtracting the output of said detector from the output of said first subtractor, a first divider for dividing the output of said second subtractor by the output of said first summer/inverter, and feedback means for feeding the output of said divider to said local oscillator, whereby the phase of said local oscillator is rapidly adjusted to track the phase jitter in said single sideband input wave.

Claim 40

Apparatus for receiving a single sideband input wave, the phase of which is subject to rapid jitter, comprising: a Hilbert splitter connected to said single sideband input wave, for generating the Hilbert transform of said single sideband input wave and a delayed replica of said single sideband input wave, said Hilbert transform and said delayed replica of said single sideband input wave being generated in synchronization with one another, a local oscillator for generating local oscillator waves including an in-phase local oscillator wave and a quadrature local oscillator wave, the phase of said local oscillator waves being adjustable; first, second, third and fourth multipliers connected to said Hilbert splitter and said local oscillator; said first multiplier for multiplying said delayed replica of said single sideband input wave by said in-phase local oscillator wave, said second multiplier for multiplying said Hilbert transform by said quadrature local oscillator wave, said third multiplier for multiplying said delayed replica of said single sideband input wave by said quadrature local oscillator wave, said fourth multiplier for multiplying said Hilbert transform by said in-phase local oscillator wave, a first subtractor for subtracting the output of said second multiplier from the output of said first multiplier, a first summer/inverter for adding the output of said third multiplier to the output of said fourth multiplier and inverting the result, a detector connected to the output of said first subtractor, a second subtractor for subtracting the output of said detector from the output of said first subtractor, a first divider for dividing the output of said second subtractor by the output of said first summer/inverter, and feedback means for feeding the output of said divider to said local oscillator, whereby the phase of said local oscillator is rapidly adjusted to track the phase jitter in said single sideband input wave.