【摘要】 提出了一种用于多用户协同通信系统的短期公平性协同伙伴选择方法,根据用户与接收终端之间的直接链路信噪比来决定伙伴选择顺序,其中具有最差直接链路信噪比的用户可以优先选择协同伙伴,而直接链路最好的用户则最后一个选择其伙伴,兼顾了用户的公平性以及系统性能.给出了该协同伙伴选择方法在独立同分布信道环境下的性能下限.计算机仿真结果表明,在一个具有独立同分布信道的8用户系统中,提出的方法与不考虑公平性最佳协同伙伴选择方法的性能差距约为1.5dB.更多还原

【Abstract】 A new cooperative partner selection scheme with short-term fairness constrain is proposed for multiuser cooperative communication systems.In the proposed scheme,the partner selection order is determined by the instantaneous signal-to-noise ratio (SNR) of the direct channels between users and the receiver.The user with the worst direct channel has the highest priority to select its partner,while the user with the best direct channel has the lowest priority.The performance lower bound for the proposed partner selection scheme is also presented for independent and identical distributed (i.i.d.) channels.Numeric results show that the performance gap between the proposed scheme and the best partner selection scheme is approximately 1.5 dB for an 8-user system under i.i.d.fading channels.更多还原