| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rake receiver capable of improving resistance to multipath and fading in the circuit constitution of a small scale. SOLUTION: One of reception signals frequency-converted in frequency conversion circuits 21-2n is successively selected in a changeover cycle t1 in a selection circuit 30, inputted to a matched filter 401 and demodulated there by repeatedly multiplying a code for timing detection to the reception signal by a cycle t2. The demodulated signals are averaged over plural frames for each cycle t2 in an averaging circuit 402, then the power level is detected in a reception path selection circuit 50 and then, the (m) pieces of timings capable of obtaining a high-order demodulation power level are detected among the reception signals outputted by the frequency conversion circuits 21-2n and allocated to inverse diffusion circuits 71-7m. Also, the selection circuits 61-6n are changeover- controlled so as to select the reception signals corresponding to the timing by the reception path selection circuit 50.</p> |
