Adaptive Channel Estimator Based on Least Mean Square Error for Wireless LAN

2008 ◽  
Author(s):  
Yongxue Wang
Keyword(s):  
Mean Square Error ◽  
Wireless Lan ◽  
Mean Square ◽  
Least Mean Square ◽  
Channel Estimator

scholarly journals Performance Analysis of Large-Scale MU-MIMO With a Simple and Effective Chanel Estimator

2019 ◽  
Author(s):  
Felipe Augusto Pereira de Figueiredo ◽  
Claudio Ferreira Dias ◽  
Eduardo Rodrigues de Lima ◽  
Gustavo Fraidenraich
Keyword(s):  
Mean Square Error ◽  
Spectral Efficiency ◽  
Massive Mimo ◽  
Large Scale ◽  
Mimo Systems ◽  
Minimum Mean Square Error ◽  
Noise Power ◽  
Mean Square ◽  
Pilot Contamination ◽  
Channel Estimator

Accurate channel estimation is of utmost importance for massive MIMO systems that allow providing significant improvements in spectral and energy efficiency. In this work, we investigate the spectral efficiency performance and present a channel estimator for multi-cell massive MIMO systems subjected to pilot-contamination. The proposed channel estimator performs well under moderate to aggressive pilot contamination scenarios without prior knowledge of the inter-cell large-scale channel coefficients and noise power. The estimator approximates the performance of a linear Minimum Mean Square Error (MMSE) as the number of antennas increases. Following, we derive a lower bound closed-form spectral efficiency of the Maximum Ratio Combining (MRC) detector in the proposed channel estimator. The simulation results highlight that the proposed estimator performance approaches the linear minimum mean square error (LMMSE) channel estimator asymptotically.

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