Multiuser Massive MIMO Relaying With Mixed-ADC Receiver

In this letter, a multiuser relay network with massive multiple-input multiple-output is investigated with mixed-analog-to-digital converter (ADC) at receiver. We first characterize the uplink achievable rate by deriving a tight approximation, which embraces the conventional unquantized system as a...

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Bibliographic Details
Published in:IEEE signal processing letters 2017-01, Vol.24 (1), p.76-80
Main Authors: Liu, Jian, Xu, Jindan, Xu, Wei, Jin, Shi, Dong, Xiaodai
Format: Article
Language:English
Subjects:
Analog-to-digital converter (ADC)
Antennas
massive multiple-input multiple-output (MIMO)
MIMO
Quantization (signal)
Receivers
relay
Relay networks (telecommunications)
Uplink
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Summary:In this letter, a multiuser relay network with massive multiple-input multiple-output is investigated with mixed-analog-to-digital converter (ADC) at receiver. We first characterize the uplink achievable rate by deriving a tight approximation, which embraces the conventional unquantized system as a special case. Both power scaling laws at sources and relay are presented. It is validated that the performance loss due to low-precision ADCs can be compensated by increasing the number of antennas M, obeying a logarithmical scaling law, rather than by increasing the transmit power at sources and/or relay. We show that the performance suffers from a loss factor interpreted as a nominal effective resolution of the entire mixed-ADC structure. Simulation results verify our observations.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2016.2638819