Performing an acquisition in a receiver

Details Performing an acquisition in a receiver Performing an acquisition in a receiver

2004-05-27

2008-09-02

Tran, Khai (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S130000

Reexamination Certificate

active

07421011

ABSTRACT:
A method for performing an acquisition to a code-modulated spread spectrum signal comprises receiving the transmitted signal, sampling the received signal to form samples, forming at least one reference code corresponding to a code used in the modulation and forming a non-coherent search matrix on the basis of said samples. The non-coherent search matrix comprises elements in at least a first and a second dimension. The first dimension of the non-coherent search matrix represents the same frequency deviation but different code phases of the received signal, and the second dimension of the non-coherent search matrix represents the same code phase but different frequency deviations of the received signal. Each element is addressable in the first dimension by a first index and in the second dimension by a second index.

REFERENCES:
patent: 2003/0215005 (2003-11-01), Kontola et al.
patent: 1 107 018 (2001-06-01), None
patent: 1379010 (2004-01-01), None
“Improved Search Algorithm for Fast Acquisition in a DSP-based GPS Receiver;” Flavio Daffara et al; Signal, Systems and Electronics; IEEE 1998.

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