| 摘要 |
<p>A synchronization method for received sign and its apparatus capable of increasing accuracy of detection of a receiving signal, of estimating a frequency and of improving reliability in the synchronization of received signal are provided. A signal intensity detecting section (15) is used to detect some peak values and timing values of signals obtained in a first frame and to store them into a memory (16). A signal extracting section (20) is used to estimate timing, in a second frame, by obtaining a largest synthesized peak value in both frames from the peak value and timing value supplied by a timing estimating section (19). In a frame following the second frame, frequency data estimated based on a frequency estimating signal with an estimated timing and frequency data estimated based on a frequency estimating signal corresponding to the estimated timing in the frame following the second frame are synthesized and an estimated frequency error is obtained from the synthesized frequency data. The correlation between a synchronization word with its frequency corrected based on an estimated frequency error by a signal extracting and frequency correcting section (23) and a known synchronization word is examined by a synchronization word correlating section (25) and synchronization of a receiving signal is established by a timing estimating section (27). <IMAGE></p> |
