论文标题
在双色散渠道中AFDM的飞行员辅助渠道估计
Pilot Aided Channel Estimation for AFDM in Doubly Dispersive Channels
论文作者
论文摘要
仿射频施加多路复用（AFDM）是一种多晶波形，也是在双色散通道下进行超可靠通信的有前途的解决方案。在本文中，我们提出了两个AFDM的飞行员辅助通道估计方案，分别命名为单个飞行员辅助（SPA）和多个飞行员辅助（MPA）。离散仿射傅立叶变换（DAFT）域中的飞行员，警卫和数据符号适当地安排在发射机上。在接收器时，借助估计阈值和映射表进行通道估计。应用所提出的通道估计方案的AFDM的位误差性能仅显示与AFDM相比，具有理想的已知通道状态信息的损失。此外，介绍了对多输入多输出（MIMO）和多用户上行链路/下行链路的扩展。
Affine frequency division multiplexing (AFDM) is a multi-chirp waveform and a promising solution for ultra-reliable communication under doubly dispersive channels. In this paper, we propose two pilot aided channel estimation schemes for AFDM, named single pilot aided (SPA) and multiple pilots aided (MPA) respectively. Pilot, guard and data symbols in the discrete affine Fourier transform (DAFT) domain are arranged appropriately at the transmitter. While at the receiver, channel estimation is performed with the aid of an estimation threshold and a mapping table. The bit error performance of AFDM applying the proposed channel estimation schemes shows only marginal loss compared to AFDM with ideally known channel state information. Moreover, extensions of the SPA scheme to multiple-input multiple-output (MIMO) and multi-user uplink/downlink are presented.
