无线紫外光与射频混合链路中继协作方案性能分析

Performance analysis of hybrid wireless ultraviolet and radio frequency relaying cooperative communication network

将无线紫外光通信与传统射频通信进行优势互补结合,针对双链路异构组网时的中继协作混合传输问题,采用建模与数值计算分析的方法,对比分析了不同策略和参数条件下系统的中断概率和误码率性能。基于无线紫外非直视散射信道和射频无线衰落信道的各自特点,建立了描述双链路并行传输中继与协作问题的模型,给出了3种典型情况下的传输策略。通过理论分析和数值计算的方法,给出了不同策略下混合链路中继的中断概率和误码率表达式,并在不同信道参数条件下对系统性能进行了对比分析。研究结果表明,相比于无线紫外光单链路传输,混合链路的中继协作策略在不同距离和不同参量条件下获得更低的系统中断概率。在误码率为1×10^(-6)条件下,双链路中继传输可以在不同湍流强度和不同莱斯因子情况下可获得约0.4~6.1 dB的信噪比增益改善。

By combining wireless ultraviolet(UV) communication and radio frequency(RF) communication,leveraging their respective advantages,the relay cooperation scheme for hybrid links was investigated though modeling and numerical computation method.By utilizing the unique features of the wireless UV non-line-of-sight scattering channel and the RF wireless fading channel,a hybrid UV/RF cooperation and relay model was established,along with three distinct transmission strategies,in typical channel conditions.The probability of system outage and the bit error rate(BER) were theoretically investigated along with their analytical expressions.Finally,the system performance was numerically calculated under different channel parameters for hybrid UV/RF links.The numerical results demonstrate that the hybrid UV/RF relay cooperation scheme can achieve significantly lower outage probability across varying link distances and channel conditions in comparison to a single UV communication link.When BER is equal to 1×10^(-6),the proposed strategies can achieve a performance gain ranging from 0.4 to 6.1 dB across various UV channel turbulence strengths and RF channel Ricean factors.