Dilution of Position Calculation for MS Location Estimation in Wireless Communication Systems
Journal Title: IOSR Journal of Electronics and Communication Engineering(IOSR-JECE) - Year 2018, Vol 13, Issue 4
Abstract
Geometric dilution of precision (GDOP) represents the geometric effect on the relationship between measurement error and positioning determination error. When the measurement variances are equal in each other, GDOP could be the most appropriate selection criterion of location measurement units. GDOP expression has simpler form if all the measurements with the same variance. For time of arrival (TOA) schemes, the maximum volume method of GDOP calculation does not guarantee the optimal selection of the four measurement units. The conventional method for calculating GDOP is to use matrix inversion to all subsets. GDOP was originally used as a criterion for selecting the right 3D geometric configuration of satellites in global positioning systems (GPS). In this paper, we employ GDOP using the matrix inversion method to select appropriate base stations (BSs) in cellular communication systems. The proposed BS selection criterion performs better than the random subsets of four or five BSs chosen from all seven BSs. After BS selection, the proposed distance-weighted method and threshold method for TOA schemes yields superior mobile station (MS) location estimation accuracy. For time of difference arrival (TDOA) schemes, the proposed BS selection criterion provides better MS location estimation. From simulation results, the performances of MS location strongly depend on the relative position of the MS and BSs.
Authors and Affiliations
Chien-Sheng Chen, Chia-Ming Wu
A very small Dual-Band MIMO Slot Antenna for WLAN and Wi MAX Applications
A very small dual band two element MIMO antenna for wireless local area network (WLAN) and Worldwide Interoperability for Microwave Access (WIMAX) applications is presented in this project.A microstrip line-fed antenna w...
Evaluation of Traffic Delay and Resources Utilization in Wlan Handover Schemes
Wireless local area networks (WLAN) have seen rapid growth making it very popular and widely used in data communication. New technologies in WLAN provide high data rates for real time services and also support multimedia...
Comparative Analysis of Power Control Algorithms for WCDMA Systems
Efficient radio resource management in WCDMA systems is essential while considering the limitation in channel capacity imposed by Interference. An Effective Power control scheme salvages this major draw by controlling th...
Black Box for Vehicle Dynamics - After Analysis App
Across the world, Vehicle accidents are quite common on roads. It’s just that they vary in numbers from place to place. Those who are involved in an accident might get into an argument and/or seek in-court settlements. T...
EMG Controlled Automated System
In this project, the Electromyogram (EMG) response is fed to control an automation system which is obtained from human arm response. The raw EMG signal is obtained from that part of the human muscle where the vibration g...