Article details

Title: A Low Complexity TOA Estimation for TR-UWB Impulse Radio Networks
Author(s): Jorge A. Pardiñas-Mir   Roger Lamberti   Muriel Muller   Claude Gimenes      

Abstract: A low-complexity time of arrival (TOA) estimation method for Transmitted Reference Ultra-Wideband (TR-UWB) signals is proposed. It has a two-step structure adapted to the Time Delayed Sampling and Correlation (TDSC) receiver. The estimation principle is based on the changes of the received signal by means of the derivative of its sliding correlation. The proposal’s first step finds a signal block containing the start of the direct path received pulse (coarse estimate). The second step searches in that block for the actual beginning of the pulse with a higher resolution (fine estimate). The method takes into account the characteristics of the TDSC receiver CMOS prototype which, in its actual version, can achieve a sampling frequency of 7.5 GHz offering a resolution of around 4 cm. The performance evaluation of the proposed TOA estimation is presented along with some experimental results. This TOA estimator structure is simple, feasible, and with a low computing demand, suited for fast mobile localization.

Keywords: indoor localization, ranging, Ultra-Wideband, time of arrival, TR-UWB, TDSC.


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