Digital single sideband modulator and method

Details Digital single sideband modulator and method Digital single sideband modulator and method

1994-09-19

1995-08-29

Mis, David

Modulators

Amplitude modulator

Single or vestigial sideband type

375301, 455109, H03C 160, H04L 2704

Patent

active

054464234

ABSTRACT:
A digital single sideband modulator (10) includes a relatively complex CMOS NCO (14) that drives a relatively simple ECL frequency translator (30). The frequency translator (30) outputs a digital signal that is converted to analog by a D/A (44) and then filtered in a bandpass filter (46) having a pass band including a frequency of twice the NCO's clock frequency. The NCO (14) generates a modulated intermediate frequency NCO signal having quadrature components. The frequency translator (30) multiplies real and imaginary components of the NCO signal by real and imaginary components of digitized SIN, COS sampling functions (48, 50). The resulting products are added together. The adding operation is performed by a multiplexer (32), whose selection input is driven at twice the carrier frequency, and the multiplying operations are performed by a selective negation circuit (34), that is driven at the carrier frequency.

REFERENCES:
patent: 3868601 (1975-02-01), MacAfee
patent: 3909750 (1975-09-01), Brady
patent: 4327439 (1982-04-01), Gockler et al.
patent: 4644565 (1987-02-01), Seo et al.
patent: 4686688 (1987-08-01), Chung et al.
patent: 4974236 (1990-11-01), Gurcan et al.
patent: 5048058 (1991-09-01), Kaleh
patent: 5115468 (1992-05-01), Asahi et al.
patent: 5121412 (1992-06-01), Borth
patent: 5225795 (1993-06-01), Iinuma
"A Digital Single Sideband Modulator" by M. K. Gurcan, A. Watteau, D. J. Goodman and M. D. James from 1988 IEEE. ISCAS '88 pp. 1811-1815.
"HSP43216 Halfband Filter" from Harris Semiconductor, Nov. 1993. pp. 1-18.
"Compact Single Sideband Modulator" by Samuel J. Parisi, Mitre Corporation, Bedford, Mass., from Applied Microwave 1992, Fall pp. 91-94, 96.
"Trellis-coded modems, Implementation of Coded Modems", by Shuzo Kato, Masahiro Morikura and Shuji Kubota, from IEEE Dec. 1991. pp. 88-93, IEEE Communications Mag.
"Intelligent Instrumentation For Selective Pulse Excitation In NMR Imaging", by H. Jazayeri-Rad and M. A. Browne, Dept. of Instrumentation & Analytical Science, UMIST, Manchester M60 1QD, UK 1987. J. Phys., E: Sci, Instrum. 20 pp. 643-648.
"Digital Implementation Of a Coherent CPM System For Mobile Radio", by Eglin, Habermann and Dzung from IEEE 1988. ISCAS'88 p. 1815.
"A Digital Single Sideband Modulator For a Digital Radio Frequency Memory", by Capt. Thomas M. Foltz, Capt. Gregory W. Cook and Lt. Col. David E. Meer, Ph.D., Wright Patterson AFB, Ohio. U.S. Government work not protected by U.S. Copyright. pp. 926-932 undated.
"Design Of A 6-Bit CMOS Digital Radio Frequency Memory", by Gordon M. Kranz and Mark Mehalic from U.S. Government work not protected by U.S. Copyright. pp. 82-89, undated.
"VLSI Architectures For A High-Speed Tunable Digital Modulator/Demodulator/Bandpass-Filter Chip Set", by Henry Samueli, Thu-ji Lin, Robert Hawley and Steven Olafson from IEEE 1992. pp. 1065-1068.

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