Joint TOA and DOA Estimation for UWB Systems with Antenna Array via Doubled Frequency Sample Points and Extended Number of Clusters

Author:

Gong Liangliang1ORCID,Hu Yang1,Zhang Junyao1,Zhao Gaofeng1

Affiliation:

1. NARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211000, China

Abstract

The ultra-wideband (UWB) system, which transmits information using nanosecond or even sub-nanosecond pulses, has been widely applied in precise positioning. In this paper, we investigate the problem of the time of arrival (TOA) estimation and the direction of arrival (DOA) estimation in the UWB systems with antenna array and propose a joint TOA and DOA estimation algorithm with doubled frequency sample points and extended number of clusters. Specifically, the proposed algorithm uses two antennas to receive impinging signals and utilizes the conjugate symmetry characteristic of the delay matrices to extend the sample points as well as the number of clusters. Moreover, in order to obtain TOA estimates with low computational complexity, the proposed algorithm transforms the two-dimensional (2D) spectral search to one-dimensional (1D) searches. The DOA estimates can then be achieved by using the TOA estimation results and the geometric information. Simulation results are given to testify the performance of the proposed algorithm.

Funder

Application of Beidou and Ultra Wideband High Precision Positioning Technology in Ubiquitous Power Internet of Things

Publisher

Hindawi Limited

Subject

General Engineering,General Mathematics

Reference24 articles.

1. Accurate positioning in ultra-wideband systems

2. Short range tracking of moving persons by UWB sensor network;J. Rovnakova

3. A target tracking method with a single antenna using time-reversal UWB radar imaging in a multi-path environment;T. Sakamoto

4. Indoor positioning using UWB-IR signals in the presence of dense multipath with path overlapping;Y. Luo

5. UWB channel measurements and modeling for positioning and communications systems in the operating room;M. R. Mahfouz

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