Inventors:
Inyup Kang - San Diego CA, US
Christopher Patrick - San Diego CA, US
Bruce R. Meagher - San Diego CA, US
Shimman Patel - San Diego CA, US
Tao Li - San Diego CA, US
Joseph Cheung - San Diego CA, US
Pillappakkam Srinivas - San Diego CA, US
Gregory B. Foerster - San Diego CA, US
Srinivas Varadarajan - San Diego CA, US
Jian Wei - San Diego CA, US
Assignee:
QUALCOMM Incorporated - San Diego CA
International Classification:
H04B 7/212
US Classification:
370321, 370311, 370320, 370335, 370337, 370342, 370347, 370442, 375130, 375136, 375137
Abstract:
A pilot searcher for CDMA and GPS signals. In one aspect, the searcher is operated in conjunction with a sample buffer in a “real-time” or “off-line” mode. The writing/reading of samples to/from the buffer may be performed in a TDM manner via a common port, and samples may be decimated and packed prior to storing in the buffer. In another aspect, the overall search for pilots is partitioned into a number of tasks, with each task corresponding to a search over a given sample segment and based on a particular set of parameter values. The tasks may be stored in a queue and performed one at a time based on their order in the queue. Prior to performing a new task, the parameter values for that task is downloaded to a set of configuration registers. The parameters may be ordered and linked such that only new values are downloaded.