Kourosh Pahlavan

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A novel empirical approach is presented for modelling the path loss behaviour of the direct path (DP) between the transmitter and receiver, which is important for time-of-arrival-based indoor geolocation coverage characterisation. Using ultra wideband (UWB) measurements in four sites and three ranging scenarios, pathloss models at 500 MHz and 3 GHz system(More)
The relationship between behaviour of radio wave propagation and building architecture in a small indoor environment is examined. A site is divided into three partitions on the basis of number of walls between transmitter and receiver. Wideband radio propagation measurements are performed in each partition and the data analysed to compare channel(More)
We consider how junction detection and classiication can be performed in an active visual system. This is to exemplify that feature detection and classiication in general can be done by both simple and robust methods, if the vision system is allowed to look at the world rather than at prerecorded images. We address issues on how to attract the attention to(More)
In an indoor environment, channel variations which occur most frequently are due to the movement of personnel near the transmitting or receiving antennas and/or local movements of the terminals around a given location. Such spatial and short time variations in the indoor radio channel are studied and determined by performing wideband propagation experiments(More)
A new and simple rate-adaptive transmission scheme for indoor unguided optical links is proposed. The scheme is based on the use of variable silence periods, allowing the increase of the peak-average optical power ratio, which is a favourable characteristic in wireless infrared communications using intensity modulation with direct detection. Introduction:(More)
Directing attention to onset and ooset of image events for eye-head movement control. 11] David Coombs and Christopher Brown. Real-time smooth pursuit tracking for a moving binocular head. The agile eye: a high-prformance three-degree-of-freedom camera-orienting device.tions to peripheral image motion using a head/eye platform. Wor delays interpretation of(More)
The concept of indoor localization has attracted considerable attention in the field of positioning. It has been reported that time-of-arrival based localization techniques perform superior compared to received signal strength techniques or angle-of-arrival techniques. However, the accuracy of such systems is limited mainly due to unexpected large ranging(More)
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