Performance Analysis of BPSK Detection in Additive White Gaussian Noise Channels

This article examines the performance characteristics of Binary Phase Shift Keying (BPSK) modulation, particularly focusing on its behavior in Additive White Gaussian Noise (AWGN) channels. BPSK represents a fundamental digital modulation technique widely employed in communication systems due to its robustness and simplicity. Performance evaluation typically involves calculating bit error rate (BER) versus signal-to-noise ratio (SNR) using theoretical formulas and Monte Carlo simulations. Key implementation aspects include generating BPSK symbols (±1 values), adding Gaussian noise with variance corresponding to target SNR, and employing threshold detection at the receiver. The BER calculation can be implemented using MATLAB's biterr function while AWGN channel simulation utilizes the awgn function. Understanding BPSK performance under varying noise conditions provides crucial insights for communication engineers and wireless researchers designing reliable digital communication systems. This analysis serves as a foundation for comparing modulation schemes and optimizing system parameters.