一种可扩展的广义空移键控调制系统设计  

Design of a Scalable Generalized Space Shift Keying Modulation System

作　　者：祝捷 王萍 海涵 王帅 ZHU Jie;WANG Ping;HAI Han;WANG Shuai(College of Information Science and Technology,Donghua University,Shanghai 201600,China)

机构地区：[1]东华大学信息科学与技术学院,上海201600

出　　处：《计算机工程》2021年第1期188-195,共8页Computer Engineering

基　　金：国家自然科学基金(62471236)。

摘　　要：5G车联网中的不同传输业务对高可靠、可扩展和低功耗的通信性能有较高要求,为此,设计一种新型高可靠、可扩展的广义空移键控调制(GSSK)系统。在发射端提出一种基于Butson Hadamard矩阵的广义空移键控调制(BHSSK)方案,通过引入具有正交性和可扩展性的Butson Hadamard矩阵,采用循环加权方法构造符号选择矩阵,将矩阵的列作为符号向量并调制到激活的天线组合上进行发送。针对检测复杂度对车联网下通信可行性的影响,在接收端提出一种基于方向夹角加权排序检测(DWOD)算法,通过设计发射天线组合的权重因子构造天线组合搜索空间,并设置判决收敛门限以减少信号检测的搜索范围,在保证可靠性的同时降低检测复杂度。Matlab仿真结果表明,BHSSK以较少的天线实现相对较高和可扩展的频谱效率,相比GSSK、GSM、MA-SM和HSSK分别达到约8dB、3dB、3dB和0.6dB的误码率性能增益。DWOD算法在达到近似最优误码率性能的同时,其复杂度减少了约40%~70%。In 5G Internet of vehicles,different transmission services have higher communication demands for reliability,scalability and power consumption.Therefore,this paper proposes a new highly reliable and scalable Generalized Space Shift Keying(GSSK)modulation system.At the transmitter,a Butson Hadamard matrix-aided generalized Space Shift Keying(BHSSK)scheme is designed.By introducing the orthogonal and scalable Butson Hadamard matrix,the symbol selection matrix is constructed by using the cyclic weighting method,and its columns are modulated as symbol vectors to the active antenna combination for transmission.To address the influence of detection complexity on the feasibility of downlink communication in Internet of vehicles,an algorithm based on Direction angle Weighted Order Detection(DWOD)is proposed at the receiver.The weight factor of transmitting antenna combination is designed to construct the antenna combination search space,and the decision convergence threshold is set to narrow the search range of signal detection,which reduces the detection complexity while ensuring reliability.Matlab simulation results show that the BHSSK achieves relatively high and scalable spectrum efficiency with fewer antennas.Compared with GSSK,GSM,MA-SM and HSSK,it achieves Bit Error Rate(BER)performance gains of about 8 dB,3 dB,3 dB and 0.6 dB,respectively.The complexity of DWOD algorithm is reduced about 40%~70%while the performance of approximate optimal BER is achieved.

关 键 词：5G车联网 广义空移键控 Butson Hadamard矩阵 循环加权 方向夹角加权排序检测算法 

分 类 号：TN929.5[电子电信—通信与信息系统]