Ferit Ozan Akgül

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Ultra-wideband (UWB) indoor positioning systems based on Time of Arrival (TOA) techniques are considered to be the high precision alternatives to those employing received signal strength (RSS) or Angle of Arrival (AOA) due to their superior time-domain resolution. However, the performance of such systems may easily be degraded by the blockage of the direct(More)
—Time of Arrival (TOA) based indoor positioning systems are considered to be the high precision alternatives to other positioning systems employing received signal strength (RSS) or Angle of Arrival (AOA). However, such systems suffer from the blockage of the direct path (DP) and occurrence of undetected direct path (UDP) condition and their performance(More)
—Analysis of the persistency and birth/death of mul-tipath components of the channel impulse response is essential for performance evaluation of indoor geolocation algorithms using indirect paths for ranging. The use of indirect paths via multipath diversity is particularly important for situations where the direct path gets blocked. In this letter, we(More)
— A ray optics based statistical multipath channel model has been developed to describe the indoor multipath propagation including the important parameters such as path gain, time-of-arrival, angle-of-arrival and number of multipath components. Development of such a model is crucial for performance evaluation of indoor positioning systems. Based on a(More)