TAS/STBC系统在n-Rayleigh信道下的性能分析
Performance Analysis of TAS/STBC Systems under n-Rayleigh Fading Channels

DOI: 10.12677/OJCS.2014.33007, PP. 37-44

Keywords: 发射天线选择，正交空时分组码，n-Rayleigh信道，平均符号误码率
Transmit Antenna Selection, Orthogonal Space-Time Block Code, n-Rayleigh Fading Channels, Average Symbol Error Probability

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Abstract:

在n-Rayleigh信道下，研究了使用发射天线选择(TAS)和正交空时分组码(STBC)的多输入多输出(MIMO)系统的平均符号误码率(ASEP)性能。基于标量加性高斯白噪声(AWGN)信道的方法，得到了系统使用多进制正交幅度调制(MQAM)和多进制相移键控调制(MPSK)，在接收端的信噪比的表达式。然后对不同条件下的ASEP性能做了数值仿真，仿真结果表明：随着发射天线或接收天线数的增加，系统的ASEP性能得到了很好的改善，当使用QPSK调制，SNR = 12 dB，(3,3; 6)系统的误码率是2 × 10^？3, (4,4; 8)系统的误码率是2 × 10^？4, (5,5; 10)系统的误码率是2 × 10^？5。
The average symbol error probability (ASEP) of multiple-input multiple-output (MIMO) systems employing transmit antenna selection (TAS) and orthogonal space-time block code (STBC) under n-Rayleigh fading channels is investigated in this paper. Based on the scalar additive white Gaus-sian noise (AWGN) channel approach, the exact form expressions of the signal-to-noise ratio (SNR) at the receiving end are derived for multiple quadrature amplitude modulation (MQAM), and mul-tiple phase shift keying modulation (MPSK). Then the ASEP performance under different conditions is evaluated through numerical simulations. Simulation results show that: the ASEP performance can be improved with the increase of the number of transmit antennas or receive antennas, when SNR = 12 dB, the ASEP of (3,3; 6) with QPSK is 2 × 10^？3, (4,4;8) is 2× 10^？4, (5,5; 10) is 2 × 10^？5.

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