Nowadays, a variety of information related to the distance between two wireless devices can be easily obtained. This paper presents a hybrid localization scheme that combines received signal strength (RSS) and round-trip time (RTT) information with the aim of improving the previous localization schemes. The hybrid localization scheme is based on an RSS ranging technique that uses RTT ranging es...

The design of energy aware and precise localization algorithms is a challenging task in the realization of Wireless Sensor Networks (WSN). The achievable precision of algorithms strongly depends on the accuracy of the measured observations (e.g. time of signal flight or received signal strength). In reality, observations are highly defective due to different signal propagation effects occurring...

A multiple-target tracking problem for a frequency-modulated continuous-wave (FMCW) radar network is formulated and an integrated track management system is presented to solve the tracking problem in the presence of clutter. The FMCW radar network obtains beat frequency measurements with multiple collocated radars, each transmitting a sequence of chirps. The beat frequency measurements are asso...

Abstract We have validated the performance of a prototype coordinate measurement system based on multilateration by comparing it to laser tracker, i.e. well-proven instrument widely used in industry. After establishing uncertainty budget different systems, we performed position measurements with both instruments common targets. Using estimated uncertainties associated measurements, found that p...

Large-volume metrology is essential to many high-value industries and contributes the factories of future. In this context, we have developed a tri-dimensional coordinate measurement system based on multilateration technique with self-calibration. practice, an absolute distance meter, traceable SI metre, shared between four heads by fibre-optic links. From these stations, multiple measurements ...

In a distant environment, channel distortion may dramatically degrade speech recognition performance. In this paper, we propose a robust speech recognition method based on position dependent Cepstral Mean Normalization (CMN). At first the system measures the transmission characteristics according to the speaker positions from some grid points in the room a priori. In the recognition stage, the ...

For the purpose of source localization, we have proposed a constrained weighted least squares (CWLS) source localization method in our companion paper, which uses static sensors by accounting for random uncertainties in sensor positions. This paper is devoted to developing two recursive algorithms to deal with the source localization problem by using time difference of arrival (TDOA) measuremen...