Spatial Antenna Array Simulation System for DOA Estimation and Radiation Pattern Control

This document presents a comprehensive simulation program designed to model spatial antenna array systems. The system core implementation consists of two key algorithmic components: the Multiple Signal Classification (MUSIC) algorithm for high-resolution Angle of Arrival (AOA) estimation, and the null steering algorithm for adaptive weight vector computation. The MUSIC algorithm implementation involves constructing a covariance matrix from received signals, performing eigenvalue decomposition to identify signal and noise subspaces, and generating spatial spectra for direction finding. The null steering algorithm calculates optimal weight vectors through constraint optimization, enabling precise radiation pattern shaping with controlled null placement for interference cancellation. The simulation framework incorporates array geometry configuration, signal processing modules, and visualization tools for analyzing array performance parameters including beam patterns, sidelobe levels, and null depth under various operational scenarios. This program serves as an effective platform for antenna array design validation, algorithm performance evaluation, and system optimization studies.