Long-period spreading code frequency folding time frequency parallel searching method |
Title： |
| Long-period spreading code frequency folding time frequency parallel searching method |
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Application Number： |
200710118128 |
Application Date： |
2007/06/29 |
Announcement Date： |
2007/11/14 |
Pub. Date： |
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Publication Number： |
101072044 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H04B 1/707H04B 7/26G01S 5/02 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Li Hong, Lu Mingquan, Feng Zhenming |
Key Words： |
searching method, code, frequency, parallel |
Abstract： |
Characters of the method are that carrying out folding operation for mapping same segment of received signal into different frequency cells to implement parallel searching frequency cells; next, using parallel searching method for multiple code phases to implement parallel searching multiple 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 same segment of received signal mapped to different 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. |
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PCT： |
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