摘要
正交频分复用系统(OFDM)的性能受限于频偏误差的影响,基于迭代方式的频偏跟踪技术可以较好地消除残余频偏,降低计算复杂度,并能够适应时变的信道参数。提出一种基于SAGE(Space-Alternating Generalized Expectation-maximization)算法的迭代频偏跟踪方法。仿真结果表明,这种方法可以在很少的迭代次数里实现很高的估计精度,有效提高在时变信道中的接收性能。
The performance of OFDM system is degraded by frequency offset. The iterative tracking methods can eliminate the degradation effectively. A SAGE algorithm based on frequency tracking scheme is proposed in this paper. The simulation results present that the proposed algorithm achieves high precision with few iteratire time.
出处
《信息技术》
2007年第2期9-11,共3页
Information Technology
基金
国家自然科学基金重点项目(60332030)
