Comparative Study of Practical Implementation of Time Delay Estimation Methods on Single Board Computer

The article discusses the practical implementation of various methods for time delay estimation (TDE) on a Raspberry Pi single-board computer. The relevance of the research is due to the importance of the implementation of TDE methods in the tasks of object positioning and localization. The demand for real-time operation, as well as the requirement to use single-board computers as sensor nodes, imposes high demands on the efficiency of computing. The paper compares various time-domain and frequency-domain TDE methods, including those that utilize a limited set of spectral bins, applicable to problems of localization of acoustic signal sources. The paper considers various methods, their advantages, disadvantages, and computational features. In addition, we have carried out their comparative analysis as well as conducted experimental validation of theoretical estimates of the demands on computing resources. During a series of computational experiments carried out through specially developed software, the computing time and the memory usage are estimated. Based on empirical research on a single-board computer, the Raspberry Pi 4B, we reasonably advise certain methods to be employed in particular scenarios for localization of an acoustic source in space using the Raspberry Pi single boards.