| 摘要 |
PROBLEM TO BE SOLVED: To reduce transmitting power by obtaining a correlated value with the spread code of a short cycle, obtaining a delay profile based on this related value and extracting a timing signal according to a delay profile so as to improve receiving characteristic. SOLUTION: A received signal obtained by demodulating a modulated signal by a receiving and demodulating part 1 is in the state of being spread- demodulated by the spread code, and is inputted to inverse spread processing parts 21 to 23 and a matched filter 3. A timing extracting part 6 obtains the delay profile based on an added around value and extracts the timing signal based on this delay profile to add to the parts 21 and 23 . In this case, prescribed number of signals are selected in order of decreasing the added around value to extract a timing signal according to each timing. In addition the part 21 to 23 generate the spread code synchronizing with the timing signal and gives inverse spread demodulation to a received signal, and a mixing part 8 mixes an inverse spread demodulation output signal to transfer to a data processing part, etc. |
