发明名称 COMMUNICATIONS DEVICE AND RELATED METHOD WITH IMPROVED ACQUISITION ESTIMATES OF FREQUENCY OFFSET AND PHASE ERROR
摘要 A repeated preamble bit or symbol pattern such as for a binary phase shift keyed (BPSK) communications signal is received within a modem. An initial frequency offset and phase error estimate is generated by processing a Fast Fourier Transform (FFT) that detects the repeated preamble pattern for a block of samples within the communications signal. Two halves of the block of samples are correlated with a plurality of different BPSK shifted sequences to obtain a symbol timing alignment based on the shifted sequence providing the maximum correlation value. A frequency offset estimate is iteratively updated an N number of times using the shifted sequence providing the maximum correlation value to refine an acquisition estimate of the frequency offset and phase error of the received communications signal.
申请公布号 US2009154601(A1) 申请公布日期 2009.06.18
申请号 US20070954260 申请日期 2007.12.12
申请人 HARRIS CORPORATION 发明人 FURMAN WILLIAM N.;NIETO JOHN W.;TYLER WILLIAM L.
分类号 H04L27/22 主分类号 H04L27/22
代理机构 代理人
主权项
地址