Simulation of Interleave-Division Multiple Access (IDMA) Scheme with Implementation Details

This document presents a detailed simulation framework for the Interleave-Division Multiple Access (IDMA) scheme. IDMA is an advanced multiple access technique that enables multiple users to share the same frequency band through assignment of unique signature sequences and interleaving patterns. The implementation employs MATLAB/Simulink for modeling wireless communication systems, demonstrating IDMA's superior capacity and performance in multi-user environments through systematic parameter configuration.

The simulation workflow begins with defining critical system parameters including: number of users (typically implemented via a user configuration array), signature sequence generation (using Gold codes or pseudo-random sequences), and interleaver design (employing random or deterministic interleaving algorithms). The transmission simulation incorporates channel modeling with Additive White Gaussian Noise (AWGN) and fading effects, implemented through channel object initialization and signal processing functions. Key performance metrics such as Bit Error Rate (BER calculated using error counting algorithms), Signal-to-Noise Ratio (SNR sweep analysis), and throughput (bits per second computation) are evaluated through Monte Carlo simulations with iterative decoding processes.

The simulation package includes modular code structure with separate functions for: user signature generation (generate_signature.m), interleaver implementation (create_interleaver.m), and multi-user detection (MUD_detector.m). Performance analysis scripts provide comparative results through BER vs SNR plots and capacity calculations, enabling system optimization for practical wireless communication deployments. This simulation approach serves as a crucial tool for evaluating IDMA scheme efficiency and guiding real-world implementation strategies.