Performance Evaluation of Low-Complexity FDE Receivers for Massive MIMO Schemes with 1-Bit ADCs

Ricardo Candeias, João Guerreiro, R. Dinis, P. Montezuma
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引用次数: 4

Abstract

Massive multiple input, multiple output (MIMO) schemes have been considered to support the physical layer of 5G systems and its combination with single-carrier with frequency-domain equalization (SC-FDE) schemes is particularly interesting for the uplink. However, the receiver complexity increases with the number of antennas, and it is important to have low complexity massive MIMO schemes. In this paper we consider the receiver design for the uplink of massive MIMO schemes where SC-FDE techniques are employed by the user terminals. To achieve this, we empoly low resolution analog-to- digital converters (ADCs) at each receive branch of the BS, combined with low complexity FDE techniques. It is shown that, although the nonlinear distortion levels inherent to the use of low resolution ADCs can be very high, we can have excellent performance, even with low complexity FDE receivers, provided that the number of receiver antennas is higher than the number of user terminals.
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基于1位adc的大规模MIMO低复杂度FDE接收机性能评估
大规模多输入多输出(MIMO)方案被认为支持5G系统的物理层,其与单载波频域均衡(SC-FDE)方案的结合对于上行链路尤其有趣。然而,接收机的复杂度随着天线数量的增加而增加,因此采用低复杂度的大规模MIMO方案是非常重要的。本文研究了用户终端采用SC-FDE技术的大规模MIMO方案上行链路的接收机设计。为了实现这一目标,我们在BS的每个接收支路采用低分辨率模数转换器(adc),并结合低复杂性FDE技术。研究表明,尽管使用低分辨率adc所固有的非线性失真水平可能非常高,但只要接收天线的数量高于用户终端的数量,即使使用低复杂度的FDE接收器,我们也可以具有出色的性能。
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