ABSTRACT
This chapter proposes to utilize the existing hardware of consumers to achieve accurate ranging, that is, the microphone sensor. It addresses the problem of ranging and communication by using the aerial acoustic signal over the microphone channel. Accurate indoor localization utilizing low-complexity devices promises a wide spectrum of applications, especially when the global positioning system signal is inaccessible due to the blockage of the satellite signal. To facilitate the indoor localization, the chapter introduces an acoustic ranging and communication technique that leverages the existing low-complex anchor node infrastructure and microphone sensor in a mobile target. It also talks about a time-of-arrival (TOA) estimation and communication scheme that utilizes pervasive microphone channels and low-complex anchor nodes. Using the acoustic signal for ranging and localization can achieve high accuracy with no additional hardware requirement for users. To facilitate the ranging and communication under the restriction of the speaker/microphone pair, an optimized TOA estimation method and a dynamic demodulation scheme have been proposed.
