An Improved Method for TOA Estimation in TH-UWB System considering Multipath Effects and Interference

Journal Title: Journal of Information Systems and Telecommunication - Year 2014, Vol 2, Issue 1

Abstract

UWB ranging is usually based on the time-of-arrival (TOA) estimation of the first path. There are two major challenges in TOA estimation. One challenge is to deal with multipath channel, especially in indoor environments. The other challenge is the existence of interference from other sources. In this paper, we propose a new method of TOA estimation, which is very robust against the interference. In this method, during the phase of TOA estimation, the transmitter sends its pulses in random positions within the frame. This makes the position of the interference relative to the main pulse to be random. Consequently, the energy of interference would be distributed, almost uniformly, along the frame. In energy detection methodes, a constant interference along the frame does not affect the detection of arrival time and only needs the adjustment of the threshold. Simulation results in IEEE.802.15.4a channels show that, even in presence of very strong interference, TOA estimation error of less than 3 nanoseconds is feasible with the proposed method.

Authors and Affiliations

Mahdieh Ghasemlou, Saeid Nader-Esfahani, Vahid Tabataba-Vakili

Keywords

Related Articles

A New Recursive Algorithm for Universal Coding of Integers

In this paper, we aim to encode the set of all positive integers so that the codewords not only be uniquely decodable but also be an instantaneous set of binary sequences. Elias introduces three recursive algorithms for...

Load Balanced Spanning Tree in Metro Ethernet Networks

Spanning Tree Protocol (STP) is a link management standard that provides loop free paths in Ethernet networks. Deploying STP in metro area networks is inadequate because it does not meet the requirements of these network...

A Fast and Accurate Sound Source Localization Method using Optimal Combination of SRP and TDOA Methodologies

This paper presents an automatic sound source localization approach based on combination of the basic time delay estimation sub method namely, Time Difference of Arrival (TDOA), and Steered Response Power (SRP) methods....

Joint Relay Selection and Power Allocation in MIMO Cooperative Cognitive Radio Networks

In this work, the issue of joint relay selection and power allocation in Underlay MIMO Cooperative Cognitive Radio Networks (U-MIMO-CCRN) is addressed. The system consists of a number of secondary users (SUs) in the seco...

A Study on Clustering for Clustering Based Image De-noising

In this paper, the problem of de-noising of an image contaminated with Additive White Gaussian Noise (AWGN) is studied. This subject is an open problem in signal processing for more than 50 years. In the present paper, w...

Download PDF file
  • EP ID EP185968
  • DOI 10.7508/jist.2014.01.003
  • Views 116
  • Downloads 0

How To Cite

Mahdieh Ghasemlou, Saeid Nader-Esfahani, Vahid Tabataba-Vakili (2014). An Improved Method for TOA Estimation in TH-UWB System considering Multipath Effects and Interference. Journal of Information Systems and Telecommunication, 2(1), 23-30. https://europub.co.uk/articles/-A-185968