空间调制下基于极化码的Gallager映射通信系统设计  

Design of Communication System Based on Polar-codedGallager-mapping-shaped Spatial Modulation

作　　者：陈国泰 谢肇鹏[3] CHEN Guotai;XIE Zhaopeng(School of Electronic and Mechanical Engineering,Fujian Polytechnic Normal University,Fuzhou 350300,China;School of Physical and Information Engineering,Fuzhou University,Fuzhou 350116,China;College of Advanced Manufacturing,Fuzhou University,Quanzhou 362251,China)

机构地区：[1]福建技术师范学院电子与机械工程学院,福建福州350300 [2]福州大学物理与信息工程学院,福建福州350116 [3]福州大学先进制造学院,福建泉州362251

出　　处：《无线电工程》2023年第11期2590-2595,共6页Radio Engineering

基　　金：福建省自然科学基金(2020J01301)。

摘　　要：提出了一种空间调制下基于极化码的Gallager映射系统(Polar-coded Gallager-mapping-shaped Spatial Modulation,PGALSM)。系统在空间调制下利用Gallager映射方式将信号输入分布由均匀分布改成类高斯分布,使发送信号逼近最佳输入分布,获得成形增益,并利用信道降解思想分析天线激活组合和发送星座点每个比特流的可达速率。仿真结果表明,在多天线瑞利衰落信道上,中低信噪比下,PGALSM系统的可达速率优于传统的映射方案;当误比特率(Bit Error Ratio,BER)水平为10^(-4)时,PGALSM方案的性能比传统多用户方案提高0.7 dB。A Gallager mapping system with spatial modulation based on polar codes is proposed,which is called as PGALSM.The system uses the Gallager mapping method to change the signal input distribution from a uniform distribution to a Gaussian-like distribution in spatial modulation,where the transmitted signal can approach the optimal input distribution and obtain shaping gain.And the channel degradation method is used in the system to analyze the achievable rate of the antenna activation combination and each bit stream of the sending constellation point.The simulation results show that in the multi-antenna Rayleigh fading channel,the achievable rate of the proposed system is better than that in the traditional mapping scheme at low-to-medium signal-to-noise ratio,and the PGALSM scheme improve the performance by 0.7 dB compared to traditional multi-user schemes at the Bit Error Rate(BER)of 10^(-4).

关 键 词：空间调制 极化码 Gallager映射 类高斯分布 

分 类 号：TN911[电子电信—通信与信息系统]