Method and apparatus for transmitting and receiving signals having a carrier interferometry architecture
First Claim
Patent Images
1. A method of generating a communications signal comprising:
- providing for generating a plurality of carrier signals within at least one predetermined frequency band;
providing for modulating the carrier signals with at least one information signal;
providing for transmitting the plurality of modulated carrier signals into a communication channel; and
providing for receiving the transmitted modulated carrier signals from the communication channel, the receiving process including;
(a) down converting the received signals using a control signal to generate a plurality of down-converted received signals; and
(b) combining the down-converted received signals to produce a superposition signal indicative of the information signal.
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Abstract
Principles of quantum interferometry are used to create a signal architecture (known as carrier interferometry) for wireless and waveguide electromagnetic-wave communications. Carrier interferometry provides unprecedented bandwidth efficiency and enables substantial improvements in interference rejection, power efficiency, and system versatility. The carrier interferometry architecture also enables simpler transceiver designs that facilitate digital up-conversion and down-conversion.
483 Citations
20 Claims
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1. A method of generating a communications signal comprising:
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providing for generating a plurality of carrier signals within at least one predetermined frequency band;
providing for modulating the carrier signals with at least one information signal;
providing for transmitting the plurality of modulated carrier signals into a communication channel; and
providing for receiving the transmitted modulated carrier signals from the communication channel, the receiving process including;
(a) down converting the received signals using a control signal to generate a plurality of down-converted received signals; and
(b) combining the down-converted received signals to produce a superposition signal indicative of the information signal.
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2. A method for recovering an information signal modulated onto a plurality of carrier signals, the method including:
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down converting the modulated carrier signals using a control signal to generate a plurality of down-converted carrier signals, wherein a frequency of the plurality of pulses is equal to (feff±
fIF)/n, where feff is an effective carrier frequency resulting from a superposition of the received carrier signals, fiF is the center frequency of the down-converted carrier signals, and n represents a harmonic or sub-harmonic of feff; and
combining at least a subset of the down-converted carrier signals to generate an envelope signal indicative of the information signal.
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4. A system adapted to recover at least one information signal modulated onto a plurality of received carrier signals comprising:
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a down converter adapted to down convert the received carrier signals to generate a plurality of down-converted carrier signals, said down converter capable of sampling the received carrier signals according to a control signal, the control signal comprising a plurality of pulses having a frequency equal to (feff±
fIF)/n, where feff is an effective carrier frequency of a superposition of the received carrier signals, fIF is the center frequency of the down-converted carrier signals, and n represents a harmonic or sub-harmonic of feff;
a combiner coupled to said down converter adapted to combine the down-converted carrier signals to produce an envelope signal indicative of the information signal; and
a signal extraction module coupled to said filter bank adapted to extract the information signal from the envelope signal;
- View Dependent Claims (3, 5)
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6. A method for down converting a multicarrier signal to a lower frequency signal including:
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providing for receiving a plurality of carrier signals;
providing for transferring non-negligible amounts of energy from the carrier signals at an aliasing rate that is substantially equal to an effective carrier frequency of a superposition of the carrier signals plus or minus a frequency of a lower-frequency down-converted signal, divided by n, where n represents a harmonic or sub-harmonic of the effective carrier signal; and
providing for generation of the lower-frequency down-converted signal from the transferred energy.
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7. An apparatus adapted to down convert a multicarrier signal to a lower-frequency signal, comprising:
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an energy transfer signal generator;
a switch module controlled by said energy transfer signal generator; and
a storage module coupled to said switch module;
wherein said storage module is adapted to receive non-negligible amounts of energy transferred from a carrier signal at an aliasing rate that is substantially equal to an effective carrier frequency of a superposition of the carrier signals plus or minus a frequency of a lower-frequency down-converted signal, divided by n where n represents a harmonic or sub-harmonic of the effective carrier signal, wherein a lower frequency signal is generated from the transferred energy.
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8. An apparatus adapted to generate time-offset multiplexed, phase-shifted spread-spectrum signals including:
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a pulse generator capable of generating a plurality of discreet-time signals, a time-offset modulator coupled to the pulse generator capable of time-offset modulating the discreet-time signals with respect to at least one code, a phase-shift modulator coupled to at least one of the pulse generator and the time-offset modulator, the phase-shift modulator capable of phase-shift modulating the discreet-time signals, and an information-signal modulator coupled to at least one of the pulse generator, the time-offset modulator, and the phase-shift modulator, the information-signal modulator capable of modulating the discreet-time signals with at least one information signal.
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9. An electromagnetic-wave transmission system capable of generating at least one time-domain signal from a superposition of a plurality of carrier signals, the transmission system including:
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a multicarrier-signal generator capable of generating a plurality of carrier signals, and a combiner coupled to the multicarrier-signal generator, the combiner capable of combining the plurality of carrier signals to produce a superposition signal having at least one desired time-domain property resulting from interference between the carrier signals.
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10. An electromagnetic-wave receiver capable of down converting at least one redundantly modulated signal, the receiver including:
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a multicarrier receiver capable of receiving an electromagnetic signal from at least one communication channel and generating a plurality of received carrier signals, a combiner coupled to the multicarrier receiver capable of combining at least a subset of the received carrier signals into a superposition signal, and a down converter coupled to the combiner, the down converter capable of extracting at least one information signal modulated on the received carrier signals.
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11. A multicarrier down-conversion system including:
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a combiner capable of accepting a plurality of carrier signals and combining the carrier signals to generate at least one superposition signal having at least one effective carrier frequency, and a sampling system coupled to the combiner, the sampling system capable of sampling the at least one superposition signal at a sampling rate that is relative to the at least one effective carrier frequency.
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12. A method of interferometry filtering including:
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providing a plurality of instances of a combined signal that includes a plurality of interfering signals, providing an algebraically unique set of diversity-parameter distributions to the interfering signals in each of the plurality of instances, separating at least one of the interfering signals from at least one desired signal.
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13. A method of interferometry filtering including:
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providing a plurality of sets of electromagnetic signals with values of at least one diversity parameter wherein each of the sets includes a plurality of electromagnetic signals and the values applied to the electromagnetic signals are algebraically unique, mapping the electromagnetic signals in each set into a common diversity-parameter value to generate a plurality of mapped interfering signals, and separating the mapped interfering signals to recover at least one desired signal.
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14. A method of interferometry filtering including:
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providing for receiving a plurality of electromagnetic signals, providing for mapping the received signals into a common diversity-parameter value to generate a plurality of mapped interfering signals, and providing for separating the mapped interfering signals based on known proportions of the interfering signals.
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15. An interferometry filter including:
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a coupler coupled to at least one communication channel, the coupler capable of receiving a plurality of transmitted electromagnetic signals, a diversity-parameter shaper coupled to the coupler, the diversity-parameter shaper capable of adjusting at least one diversity-parameter distribution of at least one received signal, a mapper coupled to at least one of the coupler and the diversity-parameter shaper, the mapper capable of mapping the received signals into at least one common diversity-parameter value to generate a plurality of interfering signals, and a demultiplexer coupled to the mapper, the demultiplexer capable of demultiplexing the interfering signals to recover at least one desired information signal.
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16. A receiver capable of receiving a plurality of transmitted diversity-encoded electromagnetic signals including:
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a coupler coupled to at least one communication channel, the coupler capable of coupling the plurality of transmitted diversity-encoded electromagnetic signals from the at least one communication channel to generate a plurality of received signals, a diversity decoder coupled to the coupler, the diversity decoder capable of diversity decoding the received signals to generate a plurality of decoded signals, and a combiner coupled to the diversity decoder, the combiner capable of combining the decoded signals to generate at least one information-bearing signal.
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17. A receiver capable of receiving at least one transmitted, redundantly modulated multicarrier signal including:
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a coupler coupled to at least one communication channel, the coupler capable of coupling the at least one transmitted, redundantly modulated multicarrier signal from the at least one communication channel to generate a plurality of received carrier signals, a down converter coupled to the coupler, the down converter capable of down converting a plurality of the received carrier signals, a sampler coupled to the down converter, the sampler capable of sampling each of the down-converted signals over at least one sample interval, and a combiner coupled to the sampler, the combiner capable of combining the sampled signals to generate a superposition signal.
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18. A receiver for an electromagnetic-wave communication system, the receiver including:
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a coupler coupled to at least one communication channel, the coupler capable of coupling a plurality of transmitted electromagnetic signals from the at least one communication channel to generate a plurality of received signals, a diversity decoder coupled to the coupler, the diversity decoder capable of diversity decoding at least one of the received signals to generate at least one diversity-decoded received signal, and a cross correlator coupled to at least one of the diversity decoder and the coupler, the cross correlator capable of correlating a plurality of received signals including at least one diversity-decoded received signal to generate at least one information signal.
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19. A transmitter capable of transmitting coherence-multiplexing signals, the transmitter including:
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an information-signal source capable of generating at least one information signal, a wideband-signal source capable of generating at least one wideband signal, a modulator coupled to at least one of the information-signal source, the wideband-signal source, and a code source, the modulator capable of modulating the at least one information signal onto the at least one wideband signal, the code source being coupled to at least one of the information-signal source, the modulator, and the wideband-signal source, a signal replicator coupled to at least one of the modulator, the information-signal source, the code source, and the wideband-signal source, the signal replicator capable of replicating at least one input signal to generate a plurality of replicated output signals, the input signal including at least one of the information signal, the wideband signal, and an information-modulated wideband signal, a diversity encoder coupled to at least one of the signal replicator, the information-signal source, the modulator, the wideband-signal source, and the code source, the diversity encoder capable of diversity encoding at least one of a set of signals including the at least one wideband signal, the at least one information-modulated wideband signal, at least one code signal generated by the code source, and the at least one information signal, and an output coupler coupled to at least one of the diversity encoder and the modulator, the output coupler capable of coupling a plurality of signals from at least one of the diversity encoder and the modulator.
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20. A spread-spectrum transmission system including:
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a time base capable of generating at least one timing signal, an information-signal source coupled to the time base, the information-signal source capable of generating at least one information signal, a multicarrier generator coupled to the time base and the information-signal source, the multicarrier generator capable of generating a multicarrier signal and modulating the at least one information signal onto the multicarrier signal, the multicarrier generator including;
a carrier generator capable of generating a plurality of carrier signals, a code source capable of generating at least one code, a modulator coupled to the carrier generator and the code source capable of modulating the carrier signals with respect to the code, and a combiner coupled to the modulator, the combiner capable of combining the modulated carrier signals to generate at least one combined signal, and a transmission module coupled to the multicarrier generator, the transmission module capable of coupling the modulated carrier signals into a communication channel.
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Specification