论文标题
宽带mmwave mimo ofdm系统的频道估计，利用块稀疏性
Channel Estimation for Wideband MmWave MIMO OFDM System Exploiting Block Sparsity
论文作者
论文摘要
在这封信中，我们研究了宽带毫米波（MMWave）MIMO OFDM系统的时域通道估计。通过传输频域飞行员符号以及不同的波束成形向量，我们观察到时间域MMMWAVE MIMO通道表现出通道延迟稀疏性，尤其是在不同的空间方向之间的稀疏性。然后，我们提出了一个利用块稀疏性（TDCEBS）方案的时间域通道估计，该方案始终旨在找到最佳的非零块，以实现每次迭代时残留物的最大投影。特别是，我们使用Quadriga评估了系统性能，该Quadriga由5G New Radio推荐以生成宽带MMWAVE MIMO通道。拟议的TDCEBS方案的有效性通过模拟结果验证，因为拟议方案的表现优于现有方案。
In this letter, we investigate time-domain channel estimation for wideband millimeter wave (mmWave) MIMO OFDM system. By transmitting frequency-domain pilot symbols as well as different beamforming vectors, we observe that the time-domain mmWave MIMO channels exhibit channel delay sparsity and especially block sparsity among different spatial directions. Then we propose a time-domain channel estimation exploiting block sparsity (TDCEBS) scheme, which always aims at finding the best nonzero block achieving the largest projection of the residue at each iterations. In particular, we evaluate the system performance using the QuaDRiGa which is recommended by 5G New Radio to generate wideband mmWave MIMO channels. The effectiveness of the proposed TDCEBS scheme is verified by the simulation results, as the proposed scheme outperforms the existing schemes.
