On the Use of PAM versus QAM Constellations in Rate-Splitting Multiple Access

被引：0

作者：

Pendas-Recondo, Alvaro ^{[1
]}

Lopez-Fernandez, Jesus Alberto ^{[1
]}

Ayestaran, Rafael Gonzalez ^{[1
]}

机构：

[1] Univ Oviedo, Dept Elect Engn, Grp Signal Theory & Commun, Gijon 33003, Spain

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2025年 / 14卷 / 03期

关键词：

Rate-splitting multiple access (RSMA); multiple access (MA); multiantenna broadcast channel; discrete signaling; finite input constellations; superposition coding; FINITE CONSTELLATIONS; BROADCAST CHANNEL; DESIGN; NOMA;

D O I：

10.1109/LWC.2025.3528826

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A comparison between the use of PAM and QAM constellations in Rate-Splitting Multiple Access (RSMA) is presented. Previous studies of RSMA with discrete or finite input signaling have considered either QAM or PSK. We propose the use of PAM constellations for every stream, with a phase rotation of 90 degrees applied to the common stream to achieve orthogonality with private streams. Numerical results based on data rate and Symbol Error Rate (SER) analysis indicate that PAM is superior to QAM when there is a significant disparity between channels for a two-user scenario. This finding indicates that PAM constellations can extend the operational region of RSMA over other Multiple Access (MA) strategies.

引用

页码：921 / 925

页数：5

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