Bit Error Rate Evaluation for OFDM Systems Using BPSK Modulation

Performance evaluation of Bit Error Rate for OFDM systems using BPSK modulation

In wireless communication systems, Orthogonal Frequency Division Multiplexing (OFDM) is a widely adopted modulation technique. This paper evaluates and analyzes the Bit Error Rate (BER) performance of OFDM systems employing Binary Phase Shift Keying (BPSK) modulation. The implementation typically involves MATLAB simulation with key functions including signal modulation using BPSK mapper, IFFT/FFT operations for OFDM symbol transformation, and AWGN channel modeling. Through the study of BER performance under varying Signal-to-Noise Ratio (SNR) conditions, we can assess system reliability and performance characteristics, and propose corresponding improvement measures. The simulation algorithm generally follows these steps: BPSK symbol mapping, serial-to-parallel conversion, IFFT processing, cyclic prefix insertion, channel transmission with noise addition, prefix removal, FFT demodulation, and BER calculation using threshold detection. This research holds significant importance for the design and optimization of wireless communication systems, particularly in evaluating the robustness of OFDM-BPSK implementations against channel impairments.