This paper proposes a cooperative real-time positioning system to solve both indoor and outdoor location tracking problem for disaster aid, we conduct a detailed overview of pre-existing indoor positioning systems, give architecture of cooperative positioning system, and introduce the least square method to improve accuracy of time difference of arrival (TDOA) positioning algorithm. Meanwhile, ...

In this paper, we present a robust real-time sound source localization system implemented on a social robot platform developed in Institute for Infocomm Research, Singapore. The audio localization system provides the robot with auditory senses and enables the robot to direct its face to a speaker outside its frontal vision system. As the localization system exploits time difference of arrival (...

The Federal Communications Commission (FCC) has adopted regulations requiring wireless communication service providers to provide position location (PL) information for a user requesting E-911 service. The Time Difference of Arrival (TDOA) technique is one of the most promising position location techniques for cellular-type wireless communication systems. The IS-95 Code Division Multiple Access...

Many researchers have investigated multi-channel speech enhancement techniques which can be used for the pre-processing of the speech recognition system. Numerous microphones can give high performance, but they require additional hardware costs and generate the design problem about microphone position. Therefore speech enhancement technique using two microphones is preferred in mobile phone suc...

This paper presents a wideband jamming emitter localization method based on the fusion of multiple direction-ofarrivals (DOAs) and time-difference-of-arrival(s) (TDOA(s)) obtained from multiple unmanned-aerial-vehicles (UAVs). In this technique, we assume that multiple trajectory controllable UAVs are available and they are equipped with smart antennas to estimate the emitter’s angle (DOA) with...

Multiple sensors are used in a variety of geolocation systems. Many use Time Difference of Arrival (TDOA) or Received Signal Strength (RSS) measurements to estimate the most likely location of a signal. When an object does not emit an RF signal, Angle of Arrival (AOA) measurements using optical or infrared frequencies become more feasible than TDOA or RSS measurements. AOA measurements can be c...

of thesis CONSTANT FALSE ALARM RATE PERFORMANCE OF SOUND SOURCE DETECTION WITH TIME DELAY OF ARRIVAL ALGORITHM Time Delay of Arrival (TDOA) based algorithms and Steered Response Power (SRP) based algorithms are two most commonly used methods for sound source detection and localization. SRP is more robust under high reverberation and multi-target conditions, while TDOA is less computationally in...

Speech source localization (SSL) using a microphone array aims to estimate the direction-of-arrival (DOA) of the speech source. However, its performance often degrades rapidly in reverberant environments. In this paper, a novel dual-microphone SSL algorithm is proposed to address this problem. First, the time-frequency regions dominated by direct sound are extracted by tracking the envelopes of...

In this paper, we propose FlexTDOA, an indoor localization method and a system using ultra-wideband (UWB) radios. Our uses time-difference of arrival (TDOA) so that the user device remains passive is able to compute its location simply by listening communication between fixed anchors, ensuring scalability our system. The anchors communicate custom-designed, flexible time-division multiple-acces...

In this paper we address the combination of multiple feature streams in a fast speaker diarization system for meeting recordings. Whenever Multiple Distant Microphones (MDM) are used, it is possible to estimate the Time Delay of Arrival (TDOA) for different channels. In [9], it is shown that TDOA can be used as additional features together with conventional spectral features for improving speak...