A passive location system for single frequency networks using digital terrestrial TV signals

Abstract

In this work, a passive location system for single frequency networks using digital terrestrial signals is proposed. A crosscorrelation method that requires a correlation with fixed frequency was introduced for time delay estimation. The idea is first online reconstruction and update of the transmitted copy of the nearest base station (BS), and then uses this signal copy for correlation with the received signal samples. A time delay extraction method combined with K-mean clustering algorithm is developed. The minimum value of each cluster is extracted as the time delay of each BS. The BS identification can be modelled as a data association problem. A new gate that requires little statistical knowledge was utilised to solve time-of-arrival measurement uncertainty. Meanwhile, the data association strategy is also developed for successive data stream. Mobile station location is formulated as an optimisation problem and solved by a search processing. Simulations study was conducted to evaluate the system performance for different scenarios. The results demonstrate its robustness and high performance.

Base station identification in single-frequency network positioning system under mixed line-of-sight/non-line-of-sight condition

“…Different from the methods of [6,8], the proposed method keeps transmitter hardware system and DTV signal framework. Compared with the method of [9], it does not require the added hardware equipment for BS identification. Therefore it can be seen that the proposed approach is also a universal BS identification algorithm with lowest execute complexity.…”

“…In [9], the authors proposed a BS identification method using mobile velocity information. The identification problem is modelled as a data association problem.…”

“…In order to solve this problem, many BS identification algorithms have been studied for SFN positioning system, such as pseudorandom noise (PN) injection [6,7], control button method [8] and gate method based on velocity information [9]. In [6], Wang proposed a BS identification approach for Advanced Television Systems Committee DTV standard at fixed receivers.…”

Localization using DVB-T2 Signals

“…For seamless positioning, other systems were proposed to replace or augment GNSS in such environments [1]. Navigation using Signals of Opportunity (SoOP) [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] is one of the alternative non-GNSS systems. These signals can be any radio frequency signals that are designed mainly for communication rather than navigation and, consequently, are optimized for provision of adequate coverage and can be of relatively high power and able to penetrate buildings.…”

“…Examples include GSM [3][4][5][6], FM [7][8][9], Wi-Fi [5,10,11] as well as both analog and digital television signals [12][13][14][15][16][17][18]. In particular, the idea of using TV signals, which is relevant to the work presented in this paper, was first reported by Rosum Corporation [12] where the synchronous signals in both ATSC digital and NTSC analog TV signals were used to estimate the Time Of Arrival (TOA).…”