波束分裂模式检测下的太赫兹稀疏信道估计方案

THz channel estimation scheme based on beam splitting pattern detection

针对现有的基于共同稀疏信道支持的理想假设的宽带信道估计方案中阵列增益严重损失的问题,提出一种波束分裂模式检测的信道估计改进方案。建立具有时延-相控模拟的混合预编码的宽带太赫兹大规模多输入多输出系统模型;通过波束分裂效应估计出信道分量的物理方向,检测出不同子载波的信道支持度,实现每个信道分量的估计。仿真结果表明,与其它信道估计方案相比,所提方案减少了导频开销,降低了计算复杂度,鲁棒性优越。

Aiming at the severe array gain loss problem in the existing wideband channel estimation scheme based on the ideal assumption of common sparse channel support,an improved channel estimation scheme for beam splitting pattern detection was proposed.A wideband terahertz large-scale multiple-input multiple-output system model with a delay-phased analog hybrid precoding structure was established,the physical channel direction was estimated by the beam splitting effect,and the sparse channel support degrees of different subcarriers were detected to achieve the estimation of each channel component.Simulation results show that compared with other channel estimation schemes,the proposed scheme reduces the pilot overhead,reduces the calculation complexity,and has superior robustness.