LTE Downlink Channel Estimation
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This article discusses the LTE downlink channel estimation process utilizing a 2x2 MIMO (Multiple Input Multiple Output) antenna configuration. We implement a simulation based on pilot signals using the Least Squares (LS) algorithm combined with interpolation techniques. The implementation involves extracting pilot symbols from predefined LTE resource grids, applying LS estimation to obtain initial channel coefficients at pilot positions, and then using interpolation methods (such as linear or spline interpolation) to estimate channel responses across all subcarriers. This approach helps demonstrate the fundamental principles and performance characteristics of channel estimation in wireless communication systems, with particular focus on computational efficiency and estimation accuracy metrics.
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