发明名称 |
Frequency auto-correction apparatus for CDMA multipath fading channel |
摘要 |
An automatic frequency correction (AFC) apparatus used for CDMA multipath fading channels comprises a frequency-offset evaluator, an automatic frequency correction loop filter and a carrier frequency adjuster. The present invention provides a "multipath energy window" designing method for the non-determinacy of multipath signals in mobile communication environment. Frequency-offset information can be extracted from the multipath energy window by a simple calculation and evaluated by a maximal SNR weight process. This invention also provides a step-variable accumulation adjusting method and greatly improves the response speed of the AFC apparatus as compared with a conventional loop filter, whereby supplies better AFC required for CDMA mobile terminals.
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申请公布号 |
US7095993(B2) |
申请公布日期 |
2006.08.22 |
申请号 |
US20030450324 |
申请日期 |
2003.09.29 |
申请人 |
THE MITT RESEARCH INSTITUTE OF TELECOMMUNICATION TRANSMISSION |
发明人 |
YOU XIAOHU;ZHANG YAN;WANG LING;JIANG LIANGCHENG;CHENG SHIXIN |
分类号 |
H04B1/18;H04B1/707;H04L27/00 |
主分类号 |
H04B1/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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