摘要
在对导频符号处信道冲击响应估计以最小二乘(LS)准则的前提下,通过对正交频分复用(OFDM)系统中各种信道插值算法的分析及其在中国移动多媒体广播(CMMB)系统中的性能仿真,提出了一种适用于CMMB系统的信道估计方法。该方法在频率域中采用低阶维纳插值滤波方法完成,时间域采用线性插值完成。该方案不仅能降低系统的实现复杂度,而且能在恶劣的环境下获得良好的系统性能。
On the premise of estimating the pilot-symbol channel impulse response through the least square rule,this paper presents a feasible channel estimation scheme for the CMMB system on the analysis of various channel interpolation arithmetic in OFDM system and simulation performance in CMMB.The scheme adopts low-rank wiener filter to complete the channel estimation in frequency-domain and adopts linear interpolation to complete the channel estimation in time-domain.The plan can reduce the system implementation complexity and achieve a good performance in the bad environment as well.
出处
《宇航计测技术》
CSCD
2010年第3期49-52,共4页
Journal of Astronautic Metrology and Measurement