Radio receiving apparatus

Details Radio receiving apparatus Radio receiving apparatus

2008-02-08

2011-12-27

Nguyen, Duc (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S287000, C455S307000, C375S346000, C375S348000

Reexamination Certificate

active

08086204

ABSTRACT:
The radio receiving apparatus includes an adaptive receive filter capable of detecting an interference wave and an out-of-band noise level correctly and improving reception performance. The radio receiving apparatus has a plurality of filters, a received signal power meter that measures the overall received signal power, a calculator that performs calculation that associates the measured received signal power with an output of AGC, an interference power meter that measures signal power in a frequency band outside a necessary band of the received signal, a comparator that compares the calculation result by the calculator with a specific threshold, and switches that select a filter to be adopted from the plurality of filters based on the outputs of comparators. The radio receiving apparatus detects adjacent interference based on signal power in the frequency band outside the signal band and detects the noise level based on the power level at an antenna end.

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patent: 2004-336536 (2004-11-01), None
English language Abstract of JP 2004-336536.

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