发明授权
- 专利标题: Biased estimation of symbol timing offset in OFDM systems
- 专利标题(中): OFDM系统中符号定时偏移的偏置估计
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申请号: US14212859申请日: 2014-03-14
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公开(公告)号: US09160589B1公开(公告)日: 2015-10-13
- 发明人: Rohan Y. Ramlall
- 申请人: The United States of America as represented by the Secretary of the Navy
- 申请人地址: US DC Washington
- 专利权人: THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
- 当前专利权人: THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
- 当前专利权人地址: US DC Washington
- 代理机构: SPAWAR Systems Center Pacific
- 代理商 Kyle Eppele; Ryan J. Friedl
- 主分类号: H04L27/28
- IPC分类号: H04L27/28 ; H04L27/26
摘要:
A system and method involve subtracting a positive bias from a symbol timing offset estimate determined by an estimator in an orthogonal frequency division multiplexing (OFDM) receiver. The bias may be determined based upon a channel order and/or the length of a cyclic prefix of a received OFDM symbol. If based upon the length of the cyclic prefix, the bias may be less than or equal to half the length of the cyclic prefix. The estimator may be a blind estimator, a coarse estimator, or a blind coarse estimator. The OFDM receiver may have N cp 2 + 1 parallel channels, where Ncp is the number of samples of a cyclic prefix of the received OFDM symbol, where the positive bias is different for each channel.
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