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随着移动通信的飞速发展,有限的无线频谱要求无线收发信机能够对时变的无线信道进行准确的盲估计。为了进一步降低判决差错和噪声波动对估计的影响,首先介绍了对无线信道的判决加权递推最小二乘盲估计,然后修正估计的判决方式,得到改进的判决加权递推最小二乘估计,最后仿真比较了移动环境下的无线信道各种估计与延迟扩展、多普勒频移及信噪比的关系和性能。
With the rapid development of mobile communications, the limited wireless spectrum requires wireless transceivers to accurately estimate blind time-varying wireless channels. In order to further reduce the impact of decision error and noise fluctuation on the estimation, we first introduce the weighted recursive least squares blind estimation of decision-making for wireless channel, and then modify the estimated decision-making method to obtain improved decision-weighted recursive least square estimation. Finally, The simulation compares and compares the various estimates and delay spreads, Doppler shift and signal-to-noise ratio of the wireless channel under the mobile environment.