摘要
主要研究了正交频分复用(OFDM)系统中基于导频辅助的信道估计算法,分析和比较了2种常用的算法,并提出了一种基于特殊导频序列去噪的信道估计算法。仿真结果表明:提出的基于特殊导频去噪的信道估计算法和LS算法相比,在没有增加LS算法运算复杂度的情况下,有效地抑制噪声的影响,提高了信道估计的准确性;和LMMSE算法相比,信道估计的准确性高于LMMSE算法。
The channel estimation techniques for orthogonal frequency division multiplexing （OFDM） systems based on pilot assistance are investigated.Two channel estimation methods in common use are analyzed and compared, and one method based on special pilot-aided denoising is proposed. Simulation results show that, compared with the LS method, this method can control effectively the effect of noise and improve the performance of channel estimation without increasing the operation complexity of LS algorithm. Compared with LMMSE algorithm, this method has higher accuracy.
出处
《无线电通信技术》
2008年第2期28-31,共4页
Radio Communications Technology
