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叠加正交训练序列MIMO-OFDM系统的一种自适应信道跟踪方法

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摘要 在传统的基于叠加训练序列信道估计的基础上,提出了一种新的基于叠加训练序列的MIMO-OFDM系统自适应信道跟踪算法,该算法在首次估计时运用传统算法估计出信道初值,然后利用初值自适应跟踪信道。阐述了算法中特殊训练序列的构造方法,详细推导了自适应信道跟踪算法,理论上分析了算法均值收敛条件,给出了算法步长参数选择方法。本文设计的正交训练序列不仅能减小算法的运算量,而且能降低系统均峰比,并且易于实现对系统的自适应跟踪;同时,自适应跟踪算法,避免了传统算法矩阵求逆运算,减小计算复杂度。最后仿真结果与叠加训练序列基本算法做了比较,验证了算法的可行性和正确性。
出处 《数字技术与应用》 2016年第1期54-56,共3页 Digital Technology & Application
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