Patent EP0796024A2 successfully refreshed from Google Patents.
EP0796024A2
Expired / Lapsed
EP
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Low power, short range point-to-multipoint communications system
Assignee: Texas Instruments Inc
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Filing: 1995-11-28
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Granted: —
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Expires: 2015-11-28
Abstract
Abstract A point-to-multipoint or two-way communications system is provided by a nodal transmitter located in a node with a plurality of nodal antennas radiating different polarization signals about the node. The system includes subscriber stations with directional antennas adapted to receive signals radiated from the nodal transmitter. The system may additionally include capability for transmitting and radiating subscriber signals to the nodal transmitter location for two-way communications.
Inventors
- 👤 Leland J. Langston
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 09:04
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/24; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/246; H01Q21/00; H01Q21/28; H01Q3/00; H01Q3/26; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2603; H04B7/2609; H04W52/00; H04W52/02; H04W52/0209; H04W52/0212; H04W52/0219; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
126 words
A communications system comprising: a plurality of first antennas each adapted to radiate a band of communication signals into predetermined subsectors within the nodal area, said first antennas being adapted such that the polarization of frequency of the signals radiated into said subsectors of the adjacent subsectors of the nodal area are different; transceiver means for generating a set of carrier frequencies within said band for each of said plurality of first antennas, means including a time division multiplexer for modulating said carrier frequencies with time division multiplex signals to transmit time division multiplex to a sector of the nodal areas; and a plurality of subscriber stations each having a second antenna polarized to receive the communication signals from an associated one of the first antennas.
Claim 2
Dependent Claim
15 words
The system according to Claim 1 wherein said means for modulating includes a PPSK modulation.
Claim 3
Dependent Claim
29 words
The system of Claim 1 wherein said time division multiplexer receives multiple compressed digital channel signals and multiplexes them into a single bit stream for application to said modulator.
Claim 4
Dependent Claim
14 words
The system of Claim 3 wherein said digital channel signals are in ATM packets.
Claim 5
Dependent Claim
15 words
The system of Claim 3 wherein OC-1 signals are applied to said means for modulation.
Claim 6
Dependent Claim
59 words
The system of Claim 1 including a central office means for demultiplexing Sonet OC-n signals to OC-1 signals at said central office and said central office multiplexer said OC-1 signals and transmits said OC-1 signals to said transceiver, said transceiver including a receiver for demultiplexing said OC-1 signals and said demultiplexed OC-1 signals are modulated on said modulatin means.
Claim 7
Dependent Claim
107 words
A short range, wireless ,point to multipoint transmission system for transmitting over a given frquency band comprising : a plurality of contiguous sub-frequency band broadcast transmiters providing transmission of signals over said given frequency band with each of said broadcast transmitters transmitting signals at a different contiguous sub-frequency band ; a plurality of sub-frequency band antennas at one location and each of said sub-frequency band antenna coupled to one of said sub-frequency band transmitters for separately broadcasting said signals at said sub-frequency bands to thereby broadcast signals over said given frequency band ;and a plurality of receiver stations for receiving said signals over said given frequency band.
Claim 8
Dependent Claim
17 words
The system of Claim 7 wherein there is a separate amplifier for each said sub-frequency band antenna.
Claim 9
Dependent Claim
14 words
The system of Claim 7 wherein each sub-frequency band antenna is a linear array.
Claim 10
Dependent Claim
14 words
The system of Claim 9 wherein each linear array is a vertical linear array.
Claim 11
Dependent Claim
19 words
The system of Claim 10 wherein there is a phase shifter between each radiating element of said linear array.
Claim 12
Dependent Claim
16 words
The system of claim 7 wherein each sub-frequency transmitter includes a a modulator and an amplifier.
Claim 13
Dependent Claim
12 words
The system of claim 12 wherein each modulator is a QPSK modulator.
Claim 14
Dependent Claim
14 words
The system of claim 7 wherein each sub-frequency transmitter includes a time division multiplexer.
Claim 15
Dependent Claim
28 words
The system of claim 7 wherein said time division multiplexer receives multiple compressed digital channels and multiplexes them into a single bit stream for application to said modulator.
Claim 16
Dependent Claim
12 words
The system of Claim 15 wherein said digital channels transmit ATM packets.
Claim 17
Dependent Claim
12 words
The system of Claim 7 including a polarizer for each linear array.
Claim 18
Dependent Claim
20 words
The system of Claim 7 wherein said system is a telephony system and said sub-frequency transmitters are modulated with telephony.
Claim 19
Dependent Claim
21 words
The system of Claim 7 wherein said system is a video system and said sub-frequency transmitters are modulated with video information.
Claim 20
Dependent Claim
13 words
The system of Claim 7 wherein said transmitters are modulated with data signals.
Claim 21
Dependent Claim
46 words
The system of Claim 7 wherein SONET OC-n signals are demultiplexed to DC-1 signals and the OC-1 signals are multiplexed at a central office and sent to the node which includes a node receiver where the OC-1 signals are demultiplexed and applied to said sub-frequency transmitters.
References Cited (Backward Citations)
No citation records indexed.
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