| 摘要 |
Acquisition method for phase recovery in a direct sequence code division multiple access communications system, in which a first phase alignment is made at the end of a first symbol period (S1), subsequently a new mean phase shift is detected at the end of a second symbol period (S2) and a second phase correction is applied, either integrally at 100%, or preferentially enhanced at 150%. At said instant, a phase shift gradient is also estimated, associated with a shift in frequency, and a frequency correction is applied, said correction being applied and maintained for the duration of a subsequent symbol (S3). A final phase alignment is required at the end of a third symbol, if the 100% phase correction approach is adopted in the second symbol.
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