Abstract
This paper presents a least squares channel estimation (LSCE) in the UpLink transmission for a Massive MIMO systems in 5G wireless communications, combined with Orthogonal Frequency Division Multiplexing and higher-order M-QAM modulation. The Mean Square Error (MSE) of the LSCE is computed, and the performance of ZF, MMSE and V-BLAST detectors is also evaluated. Using 128-QAM modulation (i.e., increasing the noise system sensibility) with 1024 subcarriers and increasing the Base Station antennas array decreases more the Bit Error Rate (BER) for the ZF, MMSE and V-BLAST detectors with respect to the MSE. The performance degradation both ZF and MMSE compared to V-BLAST is negligible in a high receive antennas; hence, faster data rates and higher spectral efficiency levels for the communication systems. Consequently, the ZF, MMSE and V-BLAST detectors achieve a better BER with respect to channel estimation.
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Riadi, A., Boulouird, M. & Hassani, M.M. ZF and MMSE Detectors Performances of a Massive MIMO System Combined with OFDM and M-QAM Modulation. Wireless Pers Commun 116, 3261–3276 (2021). https://doi.org/10.1007/s11277-020-07848-4
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DOI: https://doi.org/10.1007/s11277-020-07848-4