Simulation of OFDM in Power-Line Communication Systems

This simulation demonstrates Orthogonal Frequency Division Multiplexing (OFDM) implementation in power-line communication systems. In power-line communications, OFDM serves as a fundamental modulation technique for transmitting data signals over electrical wiring infrastructure. It represents an efficient modulation scheme that enhances transmission reliability and speed by dividing data streams into multiple orthogonal subcarriers transmitted across different frequency bands. The simulation typically involves several key implementation stages: First, generating QAM/PSK modulated symbols that are mapped to subcarriers using IFFT transformation. A crucial step involves adding cyclic prefix to mitigate inter-symbol interference caused by power-line channel impairments. The power-line channel model incorporates noise characteristics specific to electrical networks, including background noise, impulse noise, and narrowband interference. Performance analysis includes BER calculations under varying SNR conditions and adaptive modulation techniques to optimize throughput. The simulation helps researchers understand and optimize power-line communication system performance, enabling higher-quality data transmission through practical algorithm validation and parameter tuning. Key functions often include channel estimation algorithms, synchronization routines, and equalization techniques to combat frequency-selective fading in power-line environments.