基于黎曼距离的大规模单入多出系统非相干星座映射方案设计

本文研究了一个大规模单入多出上行链路系统,其中单天线节点需要将数据及时且可靠地传送给具有大规模天线阵列的基站.在该系统中,假设发送端与基站间的信道系数在连续两个符号周期内保持恒定,且每两个符号周期独立变化一次.针对该快速衰落信道模型,本文提出了一种针对大规模唯一可分解星座(Massive uniquely factor...

Noncoherent Constellation Mapping Scheme Designs for Massive SIMO System Based on Riemannian Distance

This paper studies a massive single-input multiple-output uplink system, in which a single-antenna transmitter needs to transmit data to the receiver with a large-scale antenna array in a timely and reliable manner. In this system, the channel coefficients are assumed to remain constant during two consecutive symbol periods and change independently during the next two time symbol periods. For such a system model, we propose a mapping scheme for massive uniquely factorable constellation (MUFC), with an emphasis on avoiding the instantaneous channel state information acquisition as well as improving the system’s reliability. Specifically, we first perform constellation segmentation for the MUFC based on a Riemannian distance (RD) criterion. Then, using the trellis coding method, a specific mapping scheme for the MUFC constellation is provided. The theoretical simulation results show that the mapping scheme can increase the minimum RD between the modulated output signal sequences and improve the RD detector's error performance at the receiving end. Finally, the simulation results verify the effectiveness of our proposed scheme.