Method for synchronizing a receiver, a system, and an...

Details Method for synchronizing a receiver, a system, and an... Method for synchronizing a receiver, a system, and an...

2007-07-10

2007-07-10

Kim, Kevin (Department: 2611)

Pulse or digital communications

Synchronizers

C375S149000, C375S150000

Reexamination Certificate

active

10439591

ABSTRACT:
A method for synchronizing a receiver (1) with a transmitted code-modulated spread spectrum signal, uses at least one reference code (r(x)), which corresponds to a code used in the modulation, and determines the frequency shift of the transmitted signal and the code phase of the code used in the modulation. In the method, a correlation step is taken to form a correlation function matrix on the basis of the received signal and said reference code. A non-coherent search matrix is formed of said correlation function matrix. In the method, elements in said non-coherent search matrix are modified on the basis of at least one statistical property of the elements in said non-coherent search matrix, and/or high-pass filtering is performed before the formation of said correlation function matrix. The invention also relates to a system and a receiver in which the method is applied.

REFERENCES:
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patent: 6366599 (2002-04-01), Carlson et al.
patent: 6597678 (2003-07-01), Kuwahara et al.
patent: 6996158 (2006-02-01), Bradley
patent: 2001/0004380 (2001-06-01), Mannermaa
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patent: 1107018 (2001-06-01), None
patent: WO 98/59444 (1998-12-01), None
patent: 0223213 (2002-03-01), None
patent: WO 02/23783 (2002-03-01), None

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