Method and apparatus for synchronizing to a direct sequence spread spectrum signal
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United States of America Patent
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Nov 7, 2000
Grant Date -
N/A
app pub date -
Sep 30, 1997
filing date -
Sep 30, 1997
priority date (Note) -
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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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