TDOA Master: GCC-Based Time Delay Estimation Simulation

In this article, we explore how Generalized Cross-Correlation (GCC) based time delay estimation simulation can enhance system performance. Time delay estimation using GCC is an acoustic wave-based distance measurement technique with broad applications in indoor positioning, vehicle navigation, UAV guidance systems, and more. We will demonstrate how GCC simulation helps analyze system latency through cross-correlation algorithms, typically implemented using Fourier transforms (FFT) and peak detection methods in code. The implementation generally involves calculating phase transforms (PHAT) or other weighting functions to improve delay resolution in noisy environments. Through analysis of simulation results, we can optimize system parameters like sampling rates and filter coefficients. This article covers GCC fundamentals, practical implementation approaches including code structure for correlation peak detection, and addresses real-world challenges such as multipath interference and noise mitigation strategies.