Mobile radio communication apparatus

Details Mobile radio communication apparatus Mobile radio communication apparatus

1997-01-24

2000-02-29

Nguyen, Lee

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

455306, 455340, 455552, H04B 116

Patent

active

06032032&

ABSTRACT:
A radio communication apparatus is designed for at least first and second radio communication formats which prescribe first and second desired IF pass bandwidths respectively. The first desired IF pass bandwidth is greater than the second desired IF pass bandwidth. The radio communication apparatus includes an IF band-pass filter processing a first IF signal into a second IF signal and having a predetermined pass bandwidth corresponding to the first desired IF pass bandwidth. A demodulator recovers a first baseband signal from the second IF signal generated by the IF band-pass filter. A baseband filter processes the first baseband signal generated by the demodulator into a second baseband signal. The first baseband signal generated by the demodulator is selected as a final output signal when the first IF signal is of the first radio communication format. The second baseband signal generated by the baseband filter is selected as a final output signal when the first IF signal is of the second radio communication format.

REFERENCES:
patent: 5008895 (1991-04-01), Pireh
patent: 5442353 (1995-08-01), Jackson
patent: 5548831 (1996-08-01), Bijker et al.

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