Broadband interference reduction

Details Broadband interference reduction Broadband interference reduction

1996-11-13

1998-10-06

Faile, Andrew I.

Television

Plural transmitter system considerations

348726, 348607, 348614, 455275, 4552781, 455 63, 375347, H04N 521, H04B 106

Patent

active

058185178

ABSTRACT:
A method and apparatus of reducing interference in a broadband radio frequency link is disclosed. Different signals are received by two antenna elements, in a first case the signals comprise differently polarized signals at the same or an offset frequency; in a second case the signals comprise a wanted signal and an interference signal, wherein the interfering signal is treated as an independent channel. The method comprises the steps of receiving radio frequency signals on two independent paths, selecting a portion of the radio frequency signal in each receive path or the desired signal path after demodulation where a predetermined frequency or band of frequencies is known to be absent; measuring the signal power; determining weights in a feedback path; and applying the feedback control signals to an algorithm which determines the weight(s) applied to the wanted signal such that the signal power in the summed signal(s) due to the interfering signal is reduced or cancelled.

REFERENCES:
patent: 4503461 (1985-03-01), Nishimura
patent: 4893350 (1990-01-01), Minamisono et al.
patent: 5023620 (1991-06-01), Matsuura
patent: 5045945 (1991-09-01), Herman et al.
patent: 5119196 (1992-06-01), Ayanoglu et al.
patent: 5161018 (1992-11-01), Matsunaga

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