| Original document(15 pages) 中文版 |
The invention discloses an initial access frame synchronizing method and device in OFDM system. And the method comprises: a receiver buffers the received maximum frame length signal and makes power mutation detection on it, and records the power mutation and length of each signal; synchronizing mutation signals by decimal frequency and making FFT on the mutation signals; calculating the maximum likelihood ratio ... of each mutation signal, where the mutation signal with the maximum ... value is a precursor symbol, and making frequency correction and FFT on the precursor symbol again; calculating PN sequence of the precursor symbol; making frequency correction and FFT on one of the remaining mutation signals that has the maximum ... value and correlating with the PN sequence detected, and calculating the frame length and making initial access synchronization by timer. And it is simple to implement and has high processing efficiency. |
Application Number
申请号 |
200510103368 |
Application Date
申请日 |
2005.09.20 |
| Title 名称 |
Initial access frame synchronizing method and device for orthogonal frequency division multiplexing system |
Publication Number
公开号 |
1937604 |
Publication Date
公开日 |
2007.03.28 |
| Approval Pub. Date |
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Granted Pub. Date |
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| International Classification 分类号 |
H04L27/26 |
Applicant(s) Name
申请人 |
Zhongxing Communication Co., Ltd. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
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| Attorney & Agent 代理人 |
shenjian zhangdai |
| More information 更 多 信 息 |
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