| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce demodulation processing of received data after retrieval of a synchronization word by calculating a fixed delay amount in a service area served by a base station as an offset value from a reception reference timing and finding an individual reception reference timing position for starting detection of the synchronization word, based on the calculated value so as to eliminate a useless retrieval time. SOLUTION: A base station stores all received data by one frame from a mobile station to a storage RAM 43. A CPU 41 retrieves a synchronization word from the stored received data equivalent to one frame, copies succeeding significant data parts to a demodulation processing circuit 40 by confirming the synchronization word and using a CPU bus 42, whereby demodulation is processed. The CPU 41 retrieves a fixed delay amount of a service area of its own station, based on a delay amount of the received data in the storage RAM 43 to recognize the individual reception timing during the retrieval of the synchronization word. Thus, the retrieval time is reduced.</p> |
