| 摘要 |
PROBLEM TO BE SOLVED: To overcome the problem of a conventional data selection demodulator such that its demodulation performance has remarkably deteriorated because received modulation signals cannot have been sampled in optimum timing. SOLUTION: Digital modulation signals selected from a signal received by an antenna at a prescribed frequency band are obtained, and a plurality of clock control means generates sampling timings from the obtained signals. A plurality of delay means delay demodulated data obtained from the digital modulation signal for a prescribed period and a mixer means mixes the delayed data. The delay means control the delays so that the sampling timings of a demodulated symbol of the demodulation signal received by the mixer means are identical to each other. Thus, the demodulator can stably demodulate the received signal even in a fading state and the data selection demodulator without deterioration in the demodulation performance can be realized with a small circuit scale. |
