Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1998-02-12
1999-09-21
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342372, 372 23, 372 28, H01Q 322
Patent
active
059559926
ABSTRACT:
An optical processor for controlling a phased antenna array uses a frequency-shifted feedback cavity (FSFC), which includes a traveling-wave cavity. The FSFC incrementally delays and incrementally frequency shifts optical signals circulating in the traveling-wave cavity. Optical signals coupled out of the FSFC are separated by frequency, hence by delay, and processed to control either or both transmit and receive beam-forming operations. The FSFC provides a receiver with multiple receive signals which have incremental values of frequency. Each frequency corresponds to an incremental time sampling of optical signals input into the FSFC. Transmit signals coupled out of the FSFC have frequency and phase relationships that result in short time-domain pulses when combined. Controlling modulation and frequency of the transmit signals achieves carrier interference multiple access, a new type of spread-spectrum communications.
REFERENCES:
patent: 4641317 (1987-02-01), Fullerton
patent: 4743906 (1988-05-01), Fullerton
patent: 4813057 (1989-03-01), Fullerton
patent: 4827480 (1989-05-01), Kowalski
patent: 4901307 (1990-02-01), Gilhousen
patent: 4979186 (1990-12-01), Fullerton
patent: 5003545 (1991-03-01), Kowalski
patent: 5117239 (1992-05-01), Riza
patent: 5132694 (1992-07-01), Sreenivas
patent: 5187487 (1993-02-01), Riza
patent: 5202776 (1993-04-01), Gesell
patent: 5231405 (1993-07-01), Riza
patent: 5260968 (1993-11-01), Gardner
patent: 5274381 (1993-12-01), Riza
patent: 5307073 (1994-04-01), Riza
patent: 5329248 (1994-07-01), Izadian
patent: 5333000 (1994-07-01), Hietala
patent: 5363108 (1994-11-01), Fullerton
patent: 5367305 (1994-11-01), Volker
patent: 5432522 (1995-07-01), Kurokami
patent: 5461687 (1995-10-01), Brock
patent: 5471647 (1995-11-01), Gerlach
patent: 5512907 (1996-04-01), Riza
patent: 5515060 (1996-05-01), Hussain
patent: 5515378 (1996-05-01), Roy
patent: 5583516 (1996-12-01), Lembo
patent: 5592490 (1997-01-01), Barratt
patent: 5623360 (1997-04-01), Gesell
patent: 5642353 (1997-06-01), Roy
patent: 5677697 (1997-10-01), Lee
patent: 5687169 (1997-11-01), Fullerton
Kowalski, Squier, Pinckney, "Pulse Generation With An Acousto-Optic Frequency Shifter In A Passive Cavity," Appl. Phys. Lett., vol. 50, No. 12, Mar. 23, 1987.
Shattil, "A New Method For Generating Short Optical Pulses", T-3513, Colorado School of Mines, Dec. 1987.
Kowalski, Hale, Shattil, "Broadband Continuous-Wave Laser", Optics Letters, vol. 13, No. 8, Aug. 1988 pp. 622-624.
Kowalski, Shattil, Hale, "Optical Pulse Generation With A Frequency Shifted Feedback Laser," Appl. Phys. Lett., vol. 53, No. 9, Aug. 29, 1988.
Jeuremouic, "Smart Antenna Systems for CDMA (15-95) Technology," Microwave Online Services Co., US West Advanced Technologies white paper.
Phan Dao L.
Shattil Steve J.
Tarcza Thomas H.
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