摘要
基于时分复用导频的信道估计方案易受到噪声的影响,文章在分析多个OFDM符号信道多普勒频移扩展的低通特性后,提出了一种滑动窗口频域消噪的算法,降低了噪声对信道估计的影响。仿真结果表明,在低信噪比下信道估计的MSE性能大约有1-2dB提高,除了增加了硬件FFT运算外,没有增加计算复杂性。
Channel estimation suffers from the noise base on PASM scheme, the paper analyses the low-pass feature of Doppler frequency shift, and then present a slide window frequency depress noise algorithm, reduces the impact of noise. Simulation results confirm that MSE performance is improved 1-2dB under low SNR, algorithm do not increase compute complexity except hardware FFT transform.
出处
《信息网络安全》
2012年第6期80-81,92,共3页
Netinfo Security
