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.
|
申请公布号 |
US2004071116(A1) |
申请公布日期 |
2004.04.15 |
申请号 |
US20030450324 |
申请日期 |
2003.09.29 |
申请人 |
YOU XIAOHU;ZHANG YAN;WANG LING;JIANG LIANGCHENG;CHENG SHIXIN |
发明人 |
YOU XIAOHU;ZHANG YAN;WANG LING;JIANG LIANGCHENG;CHENG SHIXIN |
分类号 |
H04B1/707;H04L27/00;(IPC1-7):H04B7/216;H04L27/06 |
主分类号 |
H04B1/707 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|