摘要
在衰落信道中进行相干解调必须知道瞬时的信道参数,但由于信道是时变的,所以信道估计器的频率响应和带宽应该是由衰落信道的统计特性和系统的信干比决定。利用瞬时信道估计的自相关函数,本文提出了信道估计的一种新的自适应算法。在平坦瑞利信道中的计算机仿真表明本方法在3G标准支持的所有多普勒频率范围内都能获得良好的均方误差性能。
In order to perform coherent demodulation in fading channel conditions, channel phase and amplitude estimation is necessary. The form and bandwidth of the estimation filter depend on the channel fading statistics and signal-to-interference ratio due to the time-varying characteristic of mobile channel. In this paper, a novel adaptive algorithm is presented for channel estimator by using the measured auto-correlation function of the instantaneous channel estimations. The mean square error (MSE) performance under flat Rayleigh fading channel is evaluated by computer simulation and the result show that the proposed adaptive channel estimator provides good performance over wide Doppler frequency range supported by 3G.
出处
《电路与系统学报》
CSCD
2003年第3期51-54,共4页
Journal of Circuits and Systems
基金
江苏东大通信技术有限责任公司基金资助(SeuComm)
关键词
自相关函数
信道估计器
自适应算法
auto-correlation function
channel estimator
adaptive algorithm
