| 摘要 |
<p>A frequency auto-correction apparatus for CDMA multipath fading channel, comprise: a frequency error estimator, a frequency auto-correction loop filter and a carrier frequency adjuster. For a nondeterminacy of multipath signals under mobile communication environment, present invention provide a 'multipath energy window' design method, wherein a effective frequency error information can be extracted from multipath window by simply arithmetic, and the frequency error can be estimated by maximum SNR weight process. To improve response speed of a AFC device, it provides a adjustment process of the variable order interval, and, as compared with general loop filter process, its response speed is greatly improved, whereby it can be better to meet the need of AFC function of CDMA mobile terminal.</p> |
