基于DSP的LTE-TDD上行信道估计实现

Implementation of LTE-TDD uplink channel estimation based on DSP

信道估计是LTE-TDD系统接收端的重要模块之一,它对系统性能有着非常重要的影响。介绍了LTE-TDD系统上行信道解调参考信号和探测参考信号的产生方式以及时频位置映射方式,通过对硬件性能的评估,采用基于变化域的LS算法提出了一种上行信道估计实现方案。通过分析其实现复杂度和定点运算误差,该方案可以满足实时处理的要求,并能提供较好的性能。

Channel estimation is one of the important modules of the receiving end in the LTE-TDD system, and it has great impact on the system performance. This paper introduces the generation detection methods and the location of time-frequency mapping of demodulation reference signal and reference signal in the uplink channel of LTE-TDD system. Through evaluating the performance of the hardware, a program for upfink channel estimation with the domain-based LS algorithm was proposed. This program can meet the requirements of real-time processing and provide better performance through the analysis of the complexity and fixed-point computation errors.