A new range estimation algorithm with low complexity for IEEE 802.15.4a

In this paper, we propose a range estimation algorithm which detects the arrival time of direct path using IEEE 802.15.4a chirp spread spectrum (CSS) signals. For the precise range estimation, time averaging of the dechirped signals, which are transformed from the received chirp signals in different bands, is applied for reducing the bias effect of the multipaths on direct path. We verified the effectiveness of the proposed algorithm with Monte-Carlo simulation in terms of root mean square error (RMSE) in two path channels.