摘要
在分布式多点协同传输系统中,为进一步提升小区边缘用户接收性能和提高频谱利用率,提出一种联合预处理方法。该方法采用预编码和空时编码相结合的联合编码模型。在分布式天线系统的各远端天线单元(RAU)根据信道状态好坏,形成针对用户传输的协作集合。协作集合中各RAU采用相应的预编码规则对同一用户数据进行预处理,并通过空时分组码的方式发送数据。协同的各RAU进行联合传输,用户端使用最大比合并的方式接收。仿真实验结果表明,该方法能有效地改善系统误码率性能,提高边缘用户接收可靠性。
A joint preprocessing method in distributed Coordinated Multi-point（CoMP） systems is proposed so as to further improve spectrum utilization and edge user＇s receptivity,and it is adopted the style of joint-coding in which pre-coding and space time block code is combined to use.According to channel state information,some relevant Remote Antenna Units（RAUs） are chosen in Distributed Antenna System（DAS） to form a cooperating set for transmission.Precoding rules are adopted correspondingly by each RAU in cooperating set,and the processed data is transmitted by using Space Time Block Code（STBC）.A Maxima-ratio Combining（MRC） approach is adopted to calculate the received signals which are transmitted jointly by each coordinated RAU in this system.Simulation experimental results show that the proposed method can effectively improve not only the Bit Error Rate（BER）,but also the transmission reliability.
出处
《计算机工程》
CAS
CSCD
2013年第1期93-96,101,共5页
Computer Engineering
基金
教育部高等学校博士学科点专项科研基金资助项目(20106204120002)
兰州交通大学"青蓝"人才工程计划基金资助项目(152006)
关键词
多点协同传输
分布式天线系统
预编码
空时分组码
联合处理
误码率
Coordinated Multi-point（CoMP） transmission
Distributed Antenna System（DAS）
pre-coding
Space Time Block Code（STBC）
joint processing
Bit Error Rate（BER）
