计算机科学 ›› 2019, Vol. 46 ›› Issue (8): 152-156.doi: 10.11896/j.issn.1002-137X.2019.08.025
刘锋, 葛培新, 曾连荪
LIU Feng, GE Pei-xin, ZENG Lian-sun
摘要: 在快速衰落信道中,当发送端不具备即时的信道状态信息(CSIT)时,利用延迟信道状态信息能够提高系统的自由度。假设系统每个节点具有延迟CSIT,研究了非对称(即中继两侧用户数不相等)双向中继X信道的自由度。将传输过程分为MAC和BC两个阶段,提出了一种结合干扰对齐与物理层网络编码的多级传输方案,利用延迟CSIT在多个时隙解码期望消息。实验结果表明,本方案可以实现比Vaze提出的上界高21.8%的复用增益,同时,相对于TDMA方案提升了166.7%。分析结果表明,相对于TDMA方案和Vaze界,该方案能够实现一定程度的自由度增益。
中图分类号:
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