Short-period spreading code time frequency parallel searching method based on frequency folding
Title：
Short-period spreading code time frequency parallel searching method based on frequency folding
Application Number：
 200710118926
Application Date：
 2007/06/15
Announcement Date：
 2007/11/14
Pub. Date：
Publication Number：
 101072045
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H04B 1/707H04B 7/26
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Li Hong, Lu Mingquan, Feng Zhenming
Key Words：
 frequency folding, code, frequency, searching method
Abstract：
 Characters of the method are that carrying out folding operation for received signals in different frequencies to implement parallel searching frequency units; next, using FFT technique for implementing correlation between received signals and local pseudo code, and implementing parallel searching code phase units; when implementing, the method determines number of frequency unit to be searched based on frequency range and step length for searching frequency, and then carries out folding operation for signals on all frequency cells; afterwards, using FFT technique for implementing parallel correlation between the folded signals and local pseudo code so as to realize parallel searching multiple code phases. Under condition of not increasing complexity of algorithm and hardware markedly, realizing parallel searching carrier frequency unit and multiple code phase units, the method raises searching speed, and reduces time for capturing pseudo code.
Claim：
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PCT：
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2008-4-17
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