MMSE Calculation Method for QPSK MIMO Channels with Two-Path Fading

In my previous work, I discussed the "two-path fading" aspect within the MMSE calculation method for QPSK MIMO channels. However, I now require a complete technical article covering channel estimation algorithms, particularly the Least Squares (LS) algorithm implementation for Rayleigh fading channels, along with corresponding MATLAB code. Without this material, meeting my submission deadline will be extremely challenging. I would greatly appreciate the administrator's assistance in resolving this urgent matter. To clarify my requirements, let me explain the significance of channel estimation algorithms in communication systems. Channel estimation represents a crucial component in wireless communications, enabling better understanding of channel characteristics for optimized system design and performance enhancement. The LS algorithm serves as a fundamental approach in channel estimation, especially effective in Rayleigh fading environments. The MATLAB implementation should demonstrate key aspects including: - Pilot symbol insertion and reception - Channel matrix formulation for Rayleigh fading - LS estimator computation using matrix operations - Mean Square Error (MSE) performance analysis - BER simulation with QPSK modulation I urgently need this comprehensive material combining theoretical explanations with practical MATLAB code examples to complete my assignment successfully. Thank you very much for your timely support and assistance!