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中文摘要：
提出了一种时域自适应最小均方误差算法（TD-LMS）来消除正交频分多址接入（OFDMA）系统上行链路的各载波频率偏移引起的干扰.该算法首先对OFDMA系统接收端的时域信号进行估计,并利用估计量来预消除载波频率偏移,然后在时域内进行残留频率偏移消除.仿真结果表明,在相同的仿真条件下,与最小二乘算法相比,该算法可以获得3dB的增益,且对各用户的频率偏移有明显的消除效果.
英文摘要：
A time-domain adaptive algorithm based on least mean square（TD-LMS） is proposed to eliminate the interference due to the carrier frequency offset（CFO） from different users in uplink OFDMA（Orthogonal Frequency Division Multiple Access） system.In this algorithm,the CFO in time domain is estimated and is adjusted with an estimator.Then,the residual CFO is eliminated with TD-LMS scheme in time domain.Simulated results indicate that,as compared with the algorithm based on least square,the proposed algorithm is effective in eliminating the CFO of users,with a gain of 3dB in the same simulation conditions.
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