MATLAB Code Implementation for OFDM System Simulation

In this documentation, we explore the detailed implementation process of OFDM system simulation. The implementation begins with configuring 1024 subcarriers, where the MATLAB code utilizes FFT/IFFT operations to efficiently handle orthogonal frequency division multiplexing for enhanced data transmission quality. The simulation incorporates convolutional encoding using functions like poly2trellis and convenc to generate error-correcting codes, followed by block interleaving implementation to enhance data reliability against burst errors.

For modulation schemes, the code implements QPSK modulation through constellation mapping using pskmod function, achieving optimal balance between transmission rate and bandwidth utilization. The signal processing chain includes upsampling and downsampling filters implemented with resample or interp/decim functions, combined with raised-cosine filters to maintain signal integrity and minimize intersymbol interference.

The simulation also features channel estimation algorithms such as LS (Least Squares) or MMSE (Minimum Mean Square Error) methods, implemented using pilot insertion and frequency-domain interpolation to characterize channel properties and enable effective equalization. Through careful implementation of these techniques in MATLAB, the OFDM system simulation achieves improved data transmission quality and system performance.