Chapter 10
Massive MIMO Channel Estimation Schemes
Mosa Ali Abu-Rgheff,
Mosa Ali Abu-Rgheff
University of Plymouth, Centre for Security, Communications and Network Research, United Kingdom
Search for more papers by this authorBook Author(s):Mosa Ali Abu-Rgheff,
Mosa Ali Abu-Rgheff
University of Plymouth, Centre for Security, Communications and Network Research, United Kingdom
Search for more papers by this authorSummary
This chapter considers the multiple-input, multiple-output (MIMO) channels, particularly when the MIMO size becomes massive. Channel estimation in massive MIMO networks is corrupted by the pilot contamination effects creating a significant degrade to the estimates. The chapter examines the performance of cellular networks with base stations (BSs) provided with a massive number of antennas using non-cooperative time-division duplexing transmission protocol. It introduces a new pilot transmission scheme based on a coordinated pilot protocol. Initial assessment of the MIMO system performance was evaluated on the assumption of rich Rayleigh scattering environment. The chapter explores the antenna calibration to eliminate the nonreciprocity feature provoked by the radio frequency hardware mismatches at the BS and user device. It also considers two calibration methods: the Argos calibration scheme and the antennas mutual coupling calibration method. Mutual coupling analysis method has a matrix-based approach, which is appropriately applied to massive MIMO unlike the analysis of the Argos method.
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