摘要
针对3GPP LTE下行链路提出了一种有效可行的信道估计方法,其原理是首先在时域用LS算法估计出信道的冲击响应,然后通过忽略信道响应能量较小的一些径,这样在进一步抑制噪声干扰的同时还有效控制了算法复杂度;最后,将得到的经过径选择的时域信道冲击响应向量变换至频域,得到用于最终信号检测的频域信道响应向量。仿真结果表明,该改进算法与传统的LS算法相比,在保证低复杂度的同时,提高了信道估计精度。
A new channel estimation method is proposed for channel estimation in the 3GPP LTE downlink. The channel estimation is first implemented in the time - domain before selecting the dominant channel taps to improve the Signal to Noise Ratio （SNR） by ignoring the taps corresponding to the lower powers. In the frequency- domain, the transformed channel data corresponding to the pilot positions are further chosen to implement a channel interpolation before signal detection. Simulation results show that the proposed method outperforms the traditional LS approach in the frequency- domain,without increase in the computational complexity.
出处
《现代电子技术》
2010年第1期69-71,共3页
Modern Electronics Technique
