On the performance of zero-forcing processing in multi-way massive MIMO relay networks

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Abstract

We consider a multi-way massive multiple-input multiple-output relay network with zero-forcing processing at the relay. By taking into account the time-division duplex protocol with channel estimation, we derive an analytical approximation of the spectral efficiency. This approximation is very tight and simple which enables us to analyze the system performance, as well as, to compare the spectral efficiency with zero-forcing and maximum-ratio processing. Our results show that by using a very large number of relay antennas and with zero-forcing technique, we can simultaneously serve many active users in the same timefrequency resource, each with high spectral efficiency. 
Original languageEnglish
Pages (from-to)849-852
JournalIEEE Communications Letters
Volume21
Issue number4
Early online date05 Jan 2017
DOIs
Publication statusPublished - Apr 2017

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