CAJ | 학술논문

针对车载通信系统很难通过直接链路完成数据输传的问题，引入无线中继对车载数据进行转发，以确保车载通信数据的有效和可靠传输。同时，对车载端与目的端之间的通信链路不能利用的协作场景，从理论上对放大转发（AF）和解码转发（DF）两种转发策略的性能进行分析和比较。以目的端的误码率为评价标准，理论分析表明：在任何信道衰落条件下，DF的性能总是优于AF。在瑞利信道下，分别对单中继和多中继两种通信场景分别进行了蒙特卡罗仿真，仿真结果与理论分析相符。
침대차재통신계통흔난통과직접련로완성수거수전적문제，인입무선중계대차재수거진행전발，이학보차재통신수거적유효화가고전수。동시，대차재단여목적단지간적통신련로불능이용적협작장경，종이론상대방대전발（AF）화해마전발（DF）량충전발책략적성능진행분석화비교。이목적단적오마솔위평개표준，이론분석표명：재임하신도쇠락조건하，DF적성능총시우우AF。재서리신도하，분별대단중계화다중계량충통신장경분별진행료몽특잡라방진，방진결과여이론분석상부。
In vehicular communication system, aiming to solve the problem that data can't be transmitted through the direct link from source to destination, re-lay cooperation mode is introduced, which can guar-antee system feasibility and reliability. Furthermore, in the collaborative scenario that the link between vehi-cle source and vehicle destination can't be used, the two commonly used forwarding strategy, AF and DF are analyzed and compared in BER. It is testified in theory that the performance of DF is better than AF for any fading communication scenario. Monte Carlo is carried out under Rayleigh channel, and the simula-tion result is consistent with the theoretical analysis.