Radio receiver noise suppression system

Details Radio receiver noise suppression system Radio receiver noise suppression system

1993-06-07

1995-07-04

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

375346, H04B 110

Patent

active

054308941

ABSTRACT:
A noise suppression apparatus includes a tuner 1 which selectively receives a radio wave signal and transforms it into an electric signal H(k) , a field information detector 2 which detects electric field information of the radio wave signal received by the tuner 1, a noise data generator 6 which generates a noise pattern W(k) on the basis of the electric field information detected by the field information detector 2, a noise canceler 4 which removes an noise component from the signal outputted from the tuner 1, and an amplifier 7 which outputs a noiseless signal outputted from the noise canceler 4. The noise canceler 4 obtains a power spectrum .vertline.X(k).vertline..sup.2 on the basis of the signal H(k) fed from the tuner 1. Thereafter, the noise canceler 4 obtains a noise cancel signal S(k) on the basis of the values of the signal H(k), the noise pattern W(k), and the power spectrum .vertline.X(k).vertline..sup.2. The calculation for obtaining the noise cancel signal S(k) is carried out in accordance with the following equation:

REFERENCES:
patent: 3857104 (1974-12-01), Sacks
patent: 4351062 (1982-09-01), Yoshiya
patent: 4901150 (1990-02-01), Klingelhofer et al.
IEE Proceedings-G vol. 136, No. 5, Oct. 1989, Stevenage, Herts, GB, pp. 269-277, XP66014, Boussakta et al, `Prime-factor Hartley and Hartley-like Transform Calculation Using Transversal Filter-type Structures`.

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