两用户不等速率高斯MAC网格编码调制
Trellis Coded Modulation for Two-User Unequal-Rate Gaussian MAC
摘要：
本文提出了一种基于格形编码调制的码对，用于两用户高斯多址信道中的PSK信号集。为了给接收机提供独特的可解码性并最大限度地扩大星座约束（CC）容量区域，在信号集之间引入相对旋转角。随后，利用两个PSK信号集的\textit{sum alphabet}的结构来证明每个用户的网格上的Ungerboeck标记使\textit{sum trellis}中的保证最小平方欧几里德距离$d^{2}_{g, min}$最大化。因此，这种标记方案可以系统地用于构造用于两用户GMAC的网格码对，以在容量区域内接近\emph{any rate pair}。
英文摘要：
In this paper, code pairs based on trellis coded modulation are proposed over PSK signal sets for a two-user Gaussian multiple access channel. In order to provide unique decodability property to the receiver and to maximally enlarge the constellation constrained (CC) capacity region, a relative angle of rotation is introduced between the signal sets. Subsequently, the structure of the \textit{sum alphabet} of two PSK signal sets is exploited to prove that Ungerboeck labelling on the trellis of each user maximizes the guaranteed minimum squared Euclidean distance, $d^{2}_{g, min}$ in the \textit{sum trellis}. Hence, such a labelling scheme can be used systematically to construct trellis code pairs for a two-user GMAC to approach \emph{any rate pair} within the capacity region.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
