| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a newly improved time tracking loop for synchronizing the timing of a communication signal with the timing of a receiver which receives the communication signal. <P>SOLUTION: A signal receiver quickly and highly precisely captures and tracks a received spread spectrum signal by using the accumulated object of overlapped samples. The accumulated object of the samples is formed by grouping the prescribed number of successive samples together. Then, the accumulated object of the overlapped samples is generated by overlapping the prescribed section of the accumulated object of the adjacent accumulated samples. The accumulated object of the overlap samples is generated, and transmitted to a timing discriminator, and a timing error showing a difference between the timing of the received spread spectrum signal and the timing of the signal receiver is determined. The timing discriminator compares the overlap accumulation signal transmitted first with the overlap accumulation signal transmitted the next, and determines the updated timing error. Afterwards, the timing of the receiver is adjusted according to the timing error. The accumulated object of the samples is overlapped so that the system timing can be more quickly adjusted than the case of using discrete samples. <P>COPYRIGHT: (C)2009,JPO&INPIT |
