一種新的基于判決反饋的OFDM頻率跟蹤算法
A New Efficient OFDM Frequency Offset Tracking Algorithm Based on Decision-directed
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摘要: 該文提出了一種新的用于多徑信道的基于判決反饋的OFDM載波頻率跟蹤算法。該算法具有精度高,計(jì)算量小,實(shí)現(xiàn)簡(jiǎn)單的優(yōu)點(diǎn)?；谠撍惴ǖ奶攸c(diǎn)同時(shí)提出了根據(jù)信道特性加權(quán)的改進(jìn)方法,加強(qiáng)了對(duì)抗頻率選擇性衰落信道的能力,進(jìn)一步提高了在低信噪比下的跟蹤性能。
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關(guān)鍵詞:
- 正交頻分復(fù)用; 多載波; 頻偏; 同步
Abstract: A new OFDM decision-directed carrier frequency offset tracking algorithm is presented. High precision, low computational efforts and simple implement are obtained with the new algorithm. And an improvement method is also described which enhances the capacity of resist frequency selected fading channel, based on channel information. With this method, the tracking performance at low SNR is improved. -
Pollet T, Bladel M, Moeneclaey M. BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise[J].IEEE Trans. on Commun.1995, 43(2/3/4):191-[2]van de Beek J J, Sandell M, Borjesson P O. ML estimation of time and frequency offset in OFDM systems[J].IEEE Trans. on Signal Processing.1997, 45(7):1800-[3]Luise M, Marselli M, Reggiannini R. Low complexity blind carrier frequency recovery for OFDM signals over frequencyselective radio channels[J].IEEE Trans. on Commun.2002, 50(7):1182-[4]朱鵬程,杜巖,劉鵬,張偉.一種新的OFDM系統(tǒng)載波頻率捕獲算法[J].電子與信息學(xué)報(bào).2004,26(6):859-863瀏覽 -
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