Patent ID: 7035348

Claim:
A receiver apparatus for receiving substantially concurrently a plurality of signals k (k=1, 2, . . . , M) transmitted while being allocated in a broad, first frequency band, the receiver apparatus comprising: a frequency conversion section for reallocating the signals k into a second frequency band in which the signals k can be sampled; an analog-to-digital (AD) conversion section for sampling all the signals k having been reallocated into the second frequency band at a sampling frequency f s such that digital data of the sampled signals k are obtained in a third frequency band extending from zero Hz to a frequency represented by f s /2; and a signal extraction section for extracting a target base band signal k from the digital data obtained through the sampling by the AD conversion section, wherein the frequency conversion section performs the reallocation in such a manner that at least a frequency represented by Jf s /2 (J is an integer) is located between the frequencies of at least two of the reallocated signals k and that the sampled signals k do not overlap one another.