How to Scale Up the Spectral Efficiency of Multi-way Massive MIMO Relaying?

Chung Duc Ho, Hien Quoc Ngo, Michail Matthaiou, Long Nguyen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)
184 Downloads (Pure)


This paper considers a decode-and-forward (DF) multi-way massive multiple-input multiple-output (MIMO) relay system where many users exchange their data with the aid of a relay station equipped with a massive antenna array. We propose a new transmission protocol which leverages successive cancelation decoding and zero-forcing (ZF) at the users. By using properties of massive MIMO, a tight analytical approximation of the spectral efficiency is derived. We show that our proposed scheme uses only half of the time-slots required in the conventional scheme (in which the number of time-slots is equal to the number of users \cite{ho2017performance}), to exchange data across different users. As a result, the sum spectral efficiency of our proposed scheme is nearly double the one of the conventional scheme, thereby boosting the performance of multi-way massive MIMO to unprecedented levels. To improve the network energy efficiency, we also propose a power allocation scheme which maximizes the energy efficiency under a given peak power constraint at each user and the relay.
Original languageEnglish
Title of host publicationIEEE International Conference on Communications 2018
Number of pages7
Publication statusEarly online date - 31 Jul 2018
EventIEEE International Conference on Communications - Kansas, United States
Duration: 20 May 201824 May 2018


ConferenceIEEE International Conference on Communications
Abbreviated titleICC
Country/TerritoryUnited States
Internet address


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