摘要
信道估计是无线通信传输的关键技术之一,现有的OFDM盲信道估计算法存在计算复杂度高、精度低的缺点。研究了一种适用于SISO-OFDM系统改进的非冗余预编码的盲信道估计算法。在改进的算法中,采用幂法获得主特征值取代了原有的采用特征值分解,从而使计算复杂度大大降低。仿真结果表明,改进的基于非冗余预编码的盲信道估计算法性能优于原有算法,取得了较为满意的估计效果。
The channel estimation is one of the key factors for wireless communication transmission. The existing blind channel estimation algorithms have such disadvantages as high computation complexity and low accuracy for OFDM communication system. In this paper,we propose an improved non-redundant precoding assisted blind channel estimation scheme for SISO-OFDM system. In the proposed scheme,the principal eigenvector is obtained by the power method with low complexity instead of the complicated eigenvalue decomposition. Simulation results show that the channel estimation and bit error rate performance of the proposed scheme is superior to that of the conventional precoding assisted blind channel estimation scheme,and gains a better estimation effects.
出处
《无线电工程》
2014年第10期35-38,共4页
Radio Engineering
基金
国家科技重大专项基金资助项目(2012ZX03004-003)
关键词
盲信道估计
OFDM
非冗余预编码
幂法
blind channel estimation
OFDM
non-redundant precoding
power method
