First arrival detection for positioning in mobile channels
نویسندگان
چکیده
The objective of this paper is to determine the potentialities of an optimal detection scheme within the framework of subscriber location. The use of a Generalized Likelihood Ratio Test (GLRT) for detecting the first arriving path from the estimated channel observations in a multipath environment in severe NLOS conditions is described, and a high-resolution estimation algorithm for the time of arrival (TOA) is presented. Finally, the scheme performance is evaluated for different configurations.
منابع مشابه
Maximum likelihood TOA and OTDOA estimation with first arriving path detection for 3GPP LTE system
The US Federal Communications Commission (FCC) has mandated wireless network operators and mobile devices to provide accurate location information for E-911. Requirements for time of arrival (TOA) and time difference of arrival (TDOA) measurements have been specified in 3GPP LTE Rel. 9 to ensure accurate user equipment (UE) positioning even under bad conditions (e.g. with channel quickly varyin...
متن کاملImprove Positioning Accuracy in WCDMA/FDD Networks Utilizing Adaptive Threshold for Direct Component Detection
In NLOS propagation conditions power of direct component can be attenuated significantly. Therefore detection of direct component is aggravated which can degrades accuracy of Time of Arrival mobile positioning. The goal of this paper is to determine possibilities to improve estimation of direct component time delay by reducing detection threshold. Three different methods for calculating thresho...
متن کاملLearning to Detect the Subway Station Arrival for Mobile Users
The use of traditional positioning technologies relies on the underlying infrastructures. However, for the subway environment, such positioning systems may not be available for the positioning tasks, such as the detection of the train arrivals for the passengers in the train. An alternative way is to exploit the contextual information available in the mobile devices of subway riders. To this en...
متن کامل3D Path Planning Algorithm for Mobile Anchor-Assisted Positioning in Wireless Sensor Networks
Positioning service is one of Wireless Sensor Networks’ (WSNs) fundamental services. The accurate position of the sensor nodes plays a vital role in many applications of WSNs. In this paper, a 3D positioning algorithm is being proposed, using mobile anchor node to assist sensor nodes in order to estimate their positions in a 3D geospatial environment. However, mobile anchor node’s 3D path optim...
متن کاملSmart antennas for combined DOA and joint channel estimation in time-slotted CDMA mobile radio systems with joint detection
In cellular mobile radio systems, the directional inhomogeneity of the mobile radio channel can be exploited by smart antennas to increase the spectral efficiency. In this paper, a novel smart antenna concept applying receiver antenna diversity at the uplink receiver is investigated for a time-slotted code-division multiple-access (CDMA) mobile radio air interface termed time-division CDMA (TD-...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002