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研究信源和终端需要配置多根天线,而中继只有单根天线的两跳中继转发系统。为了获得空间分集,信源利用了正交空时分组编码(OSTBC)的发射策略,终端利用了选择合并方式。为了尽可能简化中继配置的复杂度,中继采用固定增益放大转发的协议。在信源和终端直接通信链路存在的情形下,首先导出总的接收信噪比的表达式,接着导出瑞利衰落条件下系统中断概率的封闭表达式,最后通过蒙特卡洛仿真和数值结果的比较,验证了理论导出表达式的精确性。
Research source and terminal need to configure multiple antennas, while the relay only two single-antenna antenna relay forwarding system. In order to obtain space diversity, the source utilizes Orthogonal Space-Time Block Code (OSTBC) transmission strategy, the terminal uses the choice of merge. In order to simplify the complexity of relay configuration as much as possible, the relay adopts the protocol of fixed gain amplification and forwarding. In the case of the direct communication link between the source and the terminal, the expression of the total received signal-to-noise ratio is derived first, and then the closed expression of the system interruption probability under the Rayleigh fading condition is derived. Finally, the Monte Carlo simulation and numerical results The comparison of the experimental results verifies the accuracy of the theoretical derivation.