Method and apparatus for transmitting and receiving signals having a carrier interferometry architecture

• US 6,686,879 B2
• Filed: 07/16/2001
• Issued: 02/03/2004
• Est. Priority Date: 02/12/1998
• Status: Expired due to Term

• Current Assignee: Arnold Alagar, Department 13, Inc. (Department 13 International Ltd.), Steve Shattil
• Original Assignee: GenghisComm LLC
• Inventors: Shattil, Steve J.
• Primary Examiner(s): Phan, Dao
• Application Number:
  US09/906,257
• Publication Number:
  US 20020034191A1
• Time in Patent Office: 932 Days
• Field of Search: 342/361, 342/367, 342/378, 342/383
• US Class Current: 342/367
• CPC Class Codes: H04B 2201/70706 with means for reducing the peak-to-average power ratio
• CPC Class Codes: H04L 1/04 using frequency diversity
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601

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.

Claims

1. 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:

a multicarrier-signal generator capable of generating a plurality of carrier signals,

a complex-weight generator coupled to the multicarrier-signal generator adapted to generate a plurality of complex carrier weights to map at least one information symbol into at least one pulse waveform resulting from a superposition of the carrier signals and centered at a predetermined time, and

a combiner coupled to at least one of the complex-weighting system and the multicarrier-signal generator, the combiner capable of combining the plurality of carrier signals to produce a superposition signal haying at least one desired time-domain property resulting from interference between the carrier signals.

2. The transmission system recited in claim 1, wherein the complex-weight generator is adapted to control at least one of a set of carrier signal parameters, including amplitude, phase, and frequency.

3. The transmission system recited in claim 1 wherein the multicarrier-signal generator is adapted to generate at least one multicarrier signal characterized by at least one set of orthogonalizing properties, including time intervals, frequencies, subspaces, polarizations, modes, and orthogonal codes.

4. The transmission system recited in claim 1 wherein the complex-weight generator is adapted to map a plurality of information symbols into a plurality of orthogonal pulse waveforms to generate a sequence of orthogonal information-modulated superposition signals.

5. The transmission system recited in claim 1 wherein the multicarrier generator is adapted to generate a number N of orthogonal carriers having a uniform carrier frequency separation f_s, and the complex-weight generator is adapted to apply a plurality of complex weights to the orthogonal carriers to generate N orthogonal information-modulated pulse waveforms in a symbol interval T=1/f_s.

6. The transmission system recited in claim 1 wherein the complex-weight generator is adapted to provide for at least one of a plurality of data multiplexing processes, including time division multiplexing, code division multiplexing, and orthogonal frequency division multiplexing.

7. The transmission system recited in claim 1 wherein the complex-weight generator is adapted to generate a plurality of weights characterized by at least one of a set of weights, including windowing weights, channel-compensation weights, code weights, and weights that facilitate signal separation via cancellation.

8. The transmission system recited in claim 1 wherein the complex-weight generator includes a modulator.

9. The transmission system recited in claim 1 further including a processor coupled to the combiner, the processor adapted to perform at least one of a set of signal processing functions, including selecting a subset of the carrier signals, providing filtering, providing digital-to-analog conversion, providing analog-to-digital conversion, providing amplification, providing frequency up-conversion, providing array processing, and providing coupling into a communication channel.

10. The transmission system recited in claim 1 wherein the complex-weight generator includes a superposition controller and a modulator, the modulator adapted to modulate at least one information signal onto the carrier signals and the superposition controller adapted to provide at least one predetermined set of weights to the carrier signals for providing a predetermined superposition signal.

11. The transmission system recited in claim 1 wherein the multicarrier-signal generator includes at least one of a set of signal generators, including a pulse generator, a plurality of local oscillators, a mode-locked system, a frequency-shifted feedback system, an FFT circuit, an IFFT circuit, a nonlinear system capable of generating harmonic and/or inter-modulation products, and a wideband signal generator coupled to a filter bank.

12. The transmission system recited in claim 1 wherein the multicarrier-signal generator and the combiner are implemented as an invertible transform function and the complex-weight generator is adapted to weight the bins of the invertible transform function.

13. The transmission system recited in claim 12, wherein the invertible transform function is implemented with at least one of a fast Fourier transform and an inverse fast Fourier transform.

14. The transmission system recited in claim 1 further including a filter for selecting a predetermined plurality of the carrier signals for transmission.

15. The transmission system recited in claim 1 wherein at least one of the multicarrier-signal generator, the complex-weight generator, and the combiner is adapted to provide at least one of the plurality of carrier signals with frequency hopping.