Pulse or digital communications – Spread spectrum
Patent
1997-09-30
2000-11-07
Chin, Stephen
Pulse or digital communications
Spread spectrum
375137, 375140, 375142, 375150, H04B 1500
Patent
active
061446912
ABSTRACT:
A method for synchronization of a receiver to a direct sequence spread spectrum (DS-SS) signal in a telecommunications system. A verification process is performed in the receiver upon initial detection of a first DS-SS signal prior to attempting synchronization to a second signal. In the verification, a window search is performed in a window centered on the PN phase of the initially detected first signal. A number K of search passes are made, each on M PN offsets. At least one parameter for each of the K window search passes is saved. The at least one parameter from each pass is then processed according to a predetermined algorithm. Based on the results of the algorithm, a decision is made as to whether or not to attempt synchronization to the second signal or to restart the search.
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patent: 5644591 (1997-07-01), Sutton
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patent: 5802121 (1998-09-01), Hiramatsu
patent: 5812593 (1998-09-01), Kaku
patent: 5995537 (1999-11-01), Kondo
Chin Stephen
Ha Dac V.
Nokia Mobile Phones Limited
Rivers Brian T.
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