Interference rejection in a radio receiver

Details Interference rejection in a radio receiver Interference rejection in a radio receiver

2006-10-03

2006-10-03

Anderson, Matthew D. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S339000, C455S340000, C455S296000, C455S250100, C455S249100, C375S260000

Reexamination Certificate

active

07116958

ABSTRACT:
The use of wideband or software defined radio is attractive in terms of cost reduction since it allows re-use of base stations for different transmission modes. However, wideband radio also introduces the problem of how to deal with high level interfering signals. Presently, such signals saturate parts of the receive circuit—typically the ADC. By detecting interference and determining its frequency, it is possible to tune a bandpass or bandpass with notch filter, to take the interfering signal out of the reception band of the receiver thereby taking the ADC out of saturation whilst retaining the ability to resolve low level signals.

REFERENCES:
patent: 5790587 (1998-08-01), Smith et al.
patent: 6389059 (2002-05-01), Smith et al.
patent: 6614806 (2003-09-01), Nanni
patent: 6738609 (2004-05-01), Clifford

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