Patent ID: 7800523

Claim:
A signal processor, comprising: a plurality of analog reception processing units; a plurality of AD converters; a plurality of DA converters; and a plurality of analog transmission processing units, wherein the signal processor is connected to a plurality of antennas for transmitting and receiving wireless signals, each of the analog reception processing units shifts a frequency band of the wireless signal received through the connected antenna to a low frequency side to generate an analog baseband signal and outputs the analog baseband signal from an output terminal, each of the AD converters converts the analog baseband signal generated by the connected analog reception processing unit into a digital baseband signal and outputs the digital baseband signal, each of the DA converters converts the input digital baseband signal into an analog baseband signal and outputs the analog baseband signal, and each of the analog transmission processing units shifts the frequency band of the analog baseband signal output from the connected DA converter to a high frequency side, the signal processor further including: a transmission switch which switches among the DA converters connected to the respective analog transmission processing units; and a reception switch which switches among the AD converters connected to the respective analog reception processing units.