摘要
MIMO(Multiple Input Multiple Output)技术与卫星通信相结合,能够充分利用空间分集,在不增加额外功率和带宽的情况下提高增益。在单卫星系统中,由于卫星上的空间大小限制,不利于获得空间分集和复用增益,因此通常考虑利用不同的极化天线构建多天线环境以获得相应增益。文中提出了一种分析交叉极化鉴别率(Cross Polar Discrimination,XPD)对单卫星双极化MIMO通信系统的影响的方法。推导了单卫星双极化MIMO系统中接收天线的SINR(Signal-to-Interference and Noise Ratio),并从误码率和信道容量两个方面分析了不同交叉极化干扰系数在开阔区域、郊区、市区3种环境下对星地链路的影响。仿真结果表明,交叉极化干扰系数越小,系统BER(Bit Error Rate)性能越好,信道容量越大,且信号在市区环境下传输时,信道容量高于开阔区域与郊区。
The combination of MIMO(multiple input multiple output)technology and satellite communications(SATCOM)canmake full use of space diversity and improve gain without adding additional power and bandwidth.In a mobile satellite system,due to the limitation of the space size on the satellite,it is not conducive to obtaining spatial diversity and multiplexing gains,so it is generally considered to construct a multi-antenna environment with different polarized antennas to obtain corresponding gains.This paper presents a method to analyze the impact of the Cross Polar Discrimination(XPD)on a single satellite dual-polarized MIMO communication system.In a polarization diversity MIMO satellite system model,through simulation from two aspects of bit error rate and channel capacity,different cross-polarization interference coefficients are evaluated in three scenarios:open area,suburban,and urban areas.The results show that the smaller the cross-polarization interference coefficient,the better the system BER(Bit Error Rate)performance and the larger the channel capacity.Moreover,when a signal is transmitted in urban areas,the channel capacity is higher than that in open area and suburban.
作者
冷悦
谢亚琴
李鹏
LENG Yue;XIE Ya-qin;LI Peng(School of Electricity and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China)
出处
《计算机科学》
CSCD
北大核心
2021年第S01期414-419,共6页
Computer Science
基金
国家自然科学基金项目(61501244)。
