标题:
基于TAS/STBC方案的深空通信系统的性能分析Performance of Deep Space Communication System Based on TAS/STBC Scheme
作者:
徐凌伟, 张浩, 王景景
关键字:
发射天线选择, 正交空时分组码, 深空通信, 平均符号误码率Transmitting Antenna Selection, Orthogonal Space-Tim Block Code, Deep Space Communication, Average Symbol Error
Probability
期刊名称:
《Journal of Aerospace Science and Technology》, Vol.2 No.2, 2014-06-27
摘要:
为了进一步改善系统性能，本文提出了一种级联编码调制的使用发射天线选择(TAS)和正交空时分组码(STBC)的深空通信系统的方案。在可变参数Rician衰落信道下，基于标量的加性高斯白噪声(AWGN)信道的方法，得到了系统在接收端信噪比的表达式。然后对不同条件下的系统的平均符号误码率(ASEP)性能做了仿真，仿真结果表明：本文所提出的方案，能够显著改善系统的性能，使系统的平均符号误码率大大降低，从而能够缓解发展中的深空通信中将会遇到的功率受限和频带紧张问题。
In order to improve the system performance, a novel deep space communication system scheme employing transmitting antenna selection (TAS) and orthogonal space-time block code (STBC) concatenated with coding modulation is proposed in this paper. Based on the scalar additive white Gaussian noise (AWGN) channel approach, the exact form expressions of the signal-to-noise ratio (SNR) at the receiving end are derived under the variable-parameter Rician fading channels. Then the system performance under different conditions was evaluated through numerical simulations. Numerical results show that: the proposed scheme could distinctly improve the system perfor- mance, with the average symbol error probability decreasing greatly, thus being able to relieve the power limit and bandwidth shortage emerging in the development of deep space communica- tion.