| 摘要 |
<p>A method and apparatus for iterative carrier frequency estimation of a base station by a mobile station in a wireless communication system is disclosed. Upon detecting a frequency correction burst ("FCB") signal from the wireless transmission of the base station, the mobile station first buffers the FCB signal and then filters the buffered signal with a bandpass filter to generate a first set of filtered data. After filtering, the first filtered data is again filtered with an auto-regressive filter to generate a corresponding set of second filtered data. With the second filtered data, iterative pole estimation of the AR filter and filtering by the AR filter is made for a predetermined set of iterations to generate a converged pole estimate, which can then be used to derive the carrier frequency of the base station. Also, the mobile station may be further adapted to receive and buffer more than one FCB signals to allow averaging of the derived carrier frequencies based on different pole estimates such that a reliable and accurate carrier frequency is obtained.</p> |
