CAJ | 학술논문

为克服协作通信系统中单向中继网络频谱效率低的问题，研究了双向信道中的中继选择问题.提出了放大转发的双向单中继选择（TWRS-AF）及网络编码的双向中继选择（TWRS-NC，TWDRS-NC）策略，推导了误比特率及分集表达式，并通过仿真对两种方式的性能进行比较分析.研究表明：在多中继无线网络中，两策略均可实现全分集；在高信噪比区域，TWRS-NC误码率是TWRS-AF的1/2，TWRS-NC获得增益是TWRS-AF的2倍；对于误比特率为10-4时，双最大标准优于MIN-W选择标准1 dB.
위극복협작통신계통중단향중계망락빈보효솔저적문제，연구료쌍향신도중적중계선택문제.제출료방대전발적쌍향단중계선택（TWRS-AF）급망락편마적쌍향중계선택（TWRS-NC，TWDRS-NC）책략，추도료오비특솔급분집표체식，병통과방진대량충방식적성능진행비교분석.연구표명：재다중계무선망락중，량책략균가실현전분집；재고신조비구역，TWRS-NC오마솔시TWRS-AF적1/2，TWRS-NC획득증익시TWRS-AF적2배；대우오비특솔위10-4시，쌍최대표준우우MIN-W선택표준1 dB.
In cooperative communication systems, in order to overcome the low spectral efficiency problem of one-way relay network, the relay selection problem of two-way relay channel was investigated. The single relay selection strategy was proposed based on amplify forwarding and two-way relay selection strategy was proposed based on network coding. Moreover, bit error rate (BER) and diversity expressions were derived, and the performance of two ways was compared by the simulation. The results indicated that two strategies can achieve full diversity in multi-relay wireless networks. In the high SNR region, the bit error rate of TWRS-NC is half of TWRS-AF, and the gain of TWRS-NC is two times of the TWRS-AF;when bit error rate is fixed at 10-4, the double maximum standard is better than MIN-W selection criteria 1 dB.