Adaptive multipath distortion equalizer

Pulse or digital communications – Repeaters – Testing

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375 47, 375 50, 375 51, 375102, 455 65, 455305, H04B 112

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active

046690913

ABSTRACT:
A communication system transmits information which may be in the form of frames or bursts of suppressed-carrier data over a dispersive transmission path which introduces multipath distortion. Each frame is stored as it is received and processed by iteratively simulating the multipath distortion, subtracting the distortion from the stored frame to form a corrected signal, and evaluating the quality of the resulting signal. The quality of the resulting signal is determined by frequency multiplying the corrected signal and evaluating the total power of components other than the frequency multiplied carriers. The iterative procedure adjusts the phase and, if deisred, the amplitude of signals tapped from a delay line.

REFERENCES:
patent: 3445771 (1969-05-01), Clapham et al.
patent: 3621139 (1971-11-01), Gibson
patent: 3997841 (1976-12-01), Borowski
patent: 4152657 (1979-05-01), Robers et al.
patent: 4243956 (1981-01-01), Lemoussu et al.
patent: 4417317 (1983-11-01), White et al.
patent: 4457007 (1984-06-01), Gutleber
patent: 4481643 (1984-11-01), Kitazawa
patent: 4519084 (1985-05-01), Langseth
patent: 4547888 (1985-10-01), Ryan et al.
patent: 4555789 (1985-11-01), Hogge, Jr.
patent: 4555790 (1985-11-01), Betts et al.
patent: 4567599 (1986-01-01), Mizoguchi
"The Multipath Phenomenon in Line-of-Sight Digital Transission Systems," by E. W. Allen, published at pp. 215-225, of the May 1984 Microwave Journal.
"Digital Communications", by John Proakis, published by McGraw-Hill, 1983, pp. 410-412.
"Digital HF Radio: A Sampling of Techniques," presented & distributed at the 3rd International Conferences on HF Communication System and Techniques, London, Feb. 26, 1985, authored by Ulrich Rhode and also published in Ham Radio Magazine, April 1985, vol. 18, No. 4.

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