بررسی و مقایسه پاسخ‌دهی صوتی و قابلیت شناسایی آرایه‌های هیدروفونی هم‌مرکز و مربعی در فرکانس‌های سوناری مبتنی بر الگوریتم‌های MVDR و DAS در نرم‌افزار متلب

Hydrophone arrays, as one of the key tools in sonar systems and underwater acoustic signal processing, play an important role in increasing the accuracy of detection and improving acoustic response. The geometric design of these arrays, especially the concentric and square shape, has a direct impact on the ability to detect the sound source, orientate, and reduce environmental noise. In this study, the performance of two geometric structures of concentric and square hydrophone arrays has been investigated and compared. The main goal is to analyze the acoustic response rate and evaluate the ability to detect these arrays at sonar operating frequencies. For a more detailed analysis, two widely used algorithms in array processing, namely the delay and sum algorithms and the minimum response variance without distortion, have been used. The DAS algorithm, as a classic and simple method, allows the signals to be collected with an appropriate delay; While the MVDR algorithm has a higher ability to separate signals and increase the signal-to-noise ratio by minimizing noise power and interference. Comparing the results of these two methods on concentric and square arrays reveals the strengths and weaknesses of each combination in different frequency conditions. The implementation and simulations have been carried out in the MATLAB software environment, which has enabled accurate modeling of the arrays, application of algorithms and analysis of the results. The findings obtained can be used in optimizing the design of hydrophone arrays for practical sonar applications, environmental monitoring and underwater communications.