Spectral efficiency of the in-band full-duplex massive multi-user multiple-input multiple-output system

2017 ◽  
Vol 11 (4) ◽  
pp. 490-498 ◽  
Author(s):  
Pengbo Xing ◽  
Ju Liu ◽  
Chao Zhai ◽  
Xinhua Wang ◽  
Lina Zheng
Keyword(s):  
Spectral Efficiency ◽  
Multiple Input Multiple Output ◽  
Full Duplex ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Output System

scholarly journals Spectral Efficiency Optimization for Full Duplex Multi-User MIMO Network

2020 ◽  
Vol 18 (12.2) ◽  
pp. 43
Author(s):  
Mai Thi Phuong Le ◽  
Hung Le Nguyen ◽  
Hieu Van Nguyen ◽  
Vien Duy Nhat Nguyen
Keyword(s):  
Spectral Efficiency ◽  
Multiple Input Multiple Output ◽  
Base Station ◽  
Full Duplex ◽  
Zero Forcing ◽  
Transmit Power ◽  
Efficiency Optimization ◽  
Mimo Antenna ◽  
Multiple Input ◽  
Input Multiple Output

In this paper, we investigate the spectral efficiency (SE) of a multi-user multiple-input multiple-output (MU-MIMO) antenna network in full-duplex (FD) regime, where uplink (UL) and downlink (DL) users simultaneously share the same time and frequency resources. Zero-forcing approach is applied efficiently to precode/detect signals in both UL and DL. To achieve the SE maximization, we formulate an optimized problem where the transmit power of Base station (BS) and users are jointly considered. Numerical results are used to show that the proposed algorithm may bring significant SE gain over the previous approaches under realistic channel conditions.

scholarly journals An Evaluation of Successive Pilot Decontamination in Massive MIMO

2018 ◽  
Vol 39 (2) ◽  
pp. 107
Author(s):  
Victor Croisfelt Rodrigues ◽  
Taufik Abrão
Keyword(s):  
Spectral Efficiency ◽  
Massive Mimo ◽  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Pilot Training ◽  
Pilot Contamination ◽  
Fundamental Issue ◽  
Data Rates ◽  
Multiple Input ◽  
Input Multiple Output

The demand for higher data rates can be satisfied by the spectral efficiency (SE) improvement offered by Massive multiple-input multiple-output (M-MIMO) systems. However, the pilot contamination remains as a fundamental issue to obtain the paramount SE in such systems. This propitiated the research of several methods to mitigate pilot contamination. One of these procedures is based on the coordination of the cells, culminating in proposals with multiple pilot training phases. This paper aims to expand the results of the original paper, whereby the concepts of large pilot training phases were offered. The evaluation of such method was conducted through more comprehensible numerical results, in which a large number of antennas were assumed and more rigorous SE expressions were used. The channel estimation approaches relying on multiple pilot training phases were considered cumbersome for implementation and an uninteresting solution to overcome pilot contamination; contradicting the results presented in the genuine paper.

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