A Transform-Domain Estimation Algorithm for OFDM Systems

This code implements a transform-domain estimation algorithm for OFDM systems, designed to achieve accurate channel condition estimation. The algorithm encompasses a complete OFDM system simulation as well as enhanced channel estimation method simulations. For channel estimation, we have implemented Least Squares (LS), Minimum Mean Square Error (MMSE), Linear Minimum Mean Square Error (LMMSE), Discrete Fourier Transform (DFT), and an improved Discrete Cosine Transform (DCT) algorithm. The implementation includes MATLAB functions for each estimation technique, with key features like pilot symbol insertion, frequency-domain processing, and noise variance calculation. Through these algorithms, we can more accurately evaluate and analyze signal transmission and reception, thereby enhancing system performance and reliability. The code provides comparative analysis of estimation errors and computational complexity across different methods.