In this article a new method is introduced for geolocating of signal emitters which is based on evolutionary computation (EC) concept. In the proposed method two well-known members of EC techniques including Bees Algorithm (BA) and Genetic Algorithm (GA), are utilized to estimate the positions of emitters by optimizing the hyperbola equations which have been resulted from Time Difference of Arr...

Localizing and tracking of marine mammals can reveal key insights into behaviors underwater that otherwise would remain unexplored. A promising nonintrusive approach to obtaining location information is based on recordings bio-acoustic signals by volumetric hydrophone arrays. Time-difference-of-arrival (TDOA) measurements echolocation clicks emitted odontocetes be extracted used for detection, ...

The steered response power phase transform (SRP-PHAT) is a beamformer method very attractive in acoustic localization applications due to its robustness in reverberant environments. This paper presents a spatial grid design procedure, called the geometrically sampled grid (GSG), which aims at computing the spatial grid by taking into account the discrete sampling of time difference of arrival (...

This paper considers the problem of fusing two low-rate sensors (e.g., microphones) for reconstructing one highresolution signal when time delay of arrival (TDOA) is present as well. We show that under certain conditions the phase of the cross-spectrum-density of lowrate measurements becomes independent of the signal in the high-rate front end of the system. We then utilize this fact to demonst...

Microseismic signals are generally considered to follow the Gauss distribution. A comparison of the dynamic characteristics of sample variance and the symmetry of microseismic signals with the signals which follows α-stable 10 distribution, reveals that the pulse characteristics of the microseismic signal is outstanding and that the probability density curve of the microseismic signal is approx...

Precise navigation, as a method for guiding vehicles from one point to another, is an important subject these days especially in navigation of aircraft. Global satellite systems (GNSSs) are capable tools such purpose. Any intentional or unintentional interference signals may cause risks deadly accidents. Therefore, it tremendously control airports harbors and locate any existing radio frequency...

For the problem of estimating time difference of arrival (TDOA) of radio waves impinging on a pair of antennas for the purpose of passively locating the source of a communications or telemetry signal in the presence of interfering signals and noise, a new class of signal-selective algorithms that are highly tolerant to interference and noise is introduced. In part I of this two-part paper, the ...

In a visible light positioning (VLP) system, a receiver can estimate its location based on signals transmitted by light emitting diodes (LEDs). In this manuscript, we investigate a quasi-synchronous VLP system, in which the LED transmitters are synchronous among themselves but are not synchronized with the receiver. In quasisynchronous VLP systems, position estimation can be performed by utiliz...

Microphone arrays are widely employed for applications like teleconferencing, high quality sound capture, speaker recognition/identification, acoustic surveillance, head aid devices, speech acquisition in automobile environments etc. For all these applications the benefits that a microphone array provides over a single microphone are two fold. First using a microphone array we can localize a so...

due to increasing growth of air traffic, it is very important to have a reliable air traffic control system. usually secondary surveillance radar systems are employed for this task. in this paper, a new approach is presented to identify interrogators location of this system. the proposed method works passively and uses just a single receiver. this goal has been reached using angle and time diff...