Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
A signal source comprising: a plurality of generators, each comprising a multistage shift register including feedback means for coupling the content of at least two stages back to an earlier stage to provide a predetermined pseudorandum sequence of characters common to all of the generators, presetting means comprising a random number generator providing signal sequences indicative of a random-like sequence of numbers, each number including a plurality of characters corresponding to the number of stages in the shift registers, means for applying the signal sequences to the plurality of shift registers to provide different initial phase setting for each of the plurality of generators, clocking means connected to each of the generators for gating each of the generators through its sequence and maintaining their respective phase settings relative to each other, means for combining connected to receive the sequence provided by each of the plurality of generators to produce a single multilevel signal, and filtering means connected to receive the single multilever signal for lowpass filtering same to provide a pseudo-Gaussian noise output signal occupying a broad bandwidth.
Claim 2
Dependent Claim
178 words
A signal source comprising: a plurality of generators, each comprising a multistage shift register including feedback means for coupling the content of at least two stages back to an earlier stage to provide a predetermined pseudorandum sequence of characters common to all of the generators, presetting means comprising a random number generator providing signal sequences indicative of a random-like sequence of numbers, each number including a plurality of characters corresponding to the number of stages in the shift registers, means for applying the signal sequences to the plurality of shift registers to provide different initial phase setting for each of the plurality of generators, clocking means connected to each of the generators for gating each of the generators through its sequence and maintaining their respective phase settings relative to each other, means for combining connected to receive the sequence provided by each of the plurality of generators to produce a single multilevel signal, and filtering means connected to receive the single multilever signal for lowpass filtering same to provide a pseudo-Gaussian noise output signal occupying a broad bandwidth.
Claim 3
Dependent Claim
31 words
A signal source in accordance with claim 1 wherein each of the plurality of shift registers has identical structure and the predetermined pseudorandom sequence of characters is a maximum length sequence.
Claim 4
Dependent Claim
23 words
A signal source in accordance with claim 2 wherein each one of the plurality of generators is a shift register having 15 stages.
Claim 5
Dependent Claim
34 words
A signal source in accordance with claim 2 wherein successive initial phase settings for each of the plurality of generators corresponds to consecutive numbers in the random-like sequence produced by said random number generator.
Claim 6
Dependent Claim
41 words
A signal source in accordance with claim 4 wherein said random number generator has a field of random numbers equal to two raised to power of N whose value corresponds to the number of stages in each of the shift registers.
Claim 7
Dependent Claim
22 words
A signal source in accordance with claim 5 wherein N, the number of stages in each of the shift registers, is 15.
Claim 8
Dependent Claim
18 words
A signal source in accordance with claim 6 wherein the plurality of generators comprises at least seven generators.