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基于对数正态分布的无线和电力线信道衰落,考虑发射功率、中继位置和脉冲噪声等因素,该文对室内无线和电力线双媒质协作的放大前传和译码前传中继系统进行建模和性能分析。针对对数正态分布衰落下积分求解性能闭合表达式的难题,首先利用对数正态分布变量和近似与Q函数变换等分别推导了放大前传和译码前传中系统采用选择式合并时的理论性能;接着根据理论计算和仿真分析了功率分配、中继位置、信道衰落和脉冲噪声参数等影响系统性能的规律。仿真验证了推导的理论性能的可靠性和准确性,相关结论为双媒质协作通信技术的应用提供了必要的理论支持。
Based on the logarithm normal distribution of wireless and power line channel fading, taking into account factors such as transmit power, relay position and impulse noise, this paper models indoor and wireless power line dual-media collaborative amplification preamble and decoding forward relay system Performance analysis. In order to solve the problem of closed-form expression of integral performance under logarithm normal distribution fading, we first derive the theory of selective merger in system of amplification and pre-transmission based on log-normal distribution variables and approximation and Q-function transformation Then, the laws of power distribution, relay position, channel fading and impulse noise parameters affecting the system performance are analyzed based on theoretical calculation and simulation. The simulation verifies the reliability and accuracy of the theoretical performance deduced. The relevant conclusions provide the necessary theoretical support for the application of bi-media cooperative communication technology.