摘要
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 rapid development of mobile telecommunication, the limited radio spectrum requires that transceiver carry out accurate wireless channel blind estimation. In order to reduce the impact of decision errors and noise fluctuations on estimation, firstly this paper analyzes the decision weighted RLS （Recursive Least Squares） estimation, and then modifies it to obtain improved RLS estimation based on modified decision weighting. Finally the relationship and performance of estimation with delay spread, Doppler frequency and SNR （ Signal Noise Ratio） , are compared with simulations.
出处
《装甲兵工程学院学报》
2007年第6期66-69,共4页
Journal of Academy of Armored Force Engineering
关键词
信道估计
判决加权
递推最小二乘
channel estimation
decision weighting
recursive least squares
