Efficient indoor ranging algorithm using chirp signalling

In this paper, we propose an efficient ranging technique using chirp signal, which employs a matrix pencil method to estimate time of arrival (TOA). The proposed TOA estimation method consists of a two-step signal processing: minimum mean square error (MMSE)-based channel impulse response estimation and the channel delay tracking by matrix pencil algorithm. At the first step, the transmitted known chirp signals are cancelled out using the MMSE criterion. Then, the delay components are extracted by matrix pencil method using the estimated frequency channel impulse response. Simulation results show that the proposed scheme achieves small ranging error with low complexity.