Channel model implementation for evaluation of location services

N.J. Thomas, D.G.M. Cruickshank, David Laurenson

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Simulation and evaluation of location services presents a number of new problems in the area of stochastic channel modelling which conventional models do not account for. Such problems are modelling of line of sight (LOS) probabilities, LOS to non-line of sight (NLOS) power ratios, NLOS excess propagation time delay, out of cell radio propagation/coverage, and spatial correlation factors. A two level channel model which addresses these problems is introduced. Local level effects, based on the CODIT propagation model, and cell level effects are incorporated. LOS probabilities and shadowing effects are treated independently at each level. Several scenarios are developed to model different levels of radiowave propagation between cells, corresponding to flat and hilly terrain. Simulation results for the two proposed idle period downlink (IDPL) time difference of arrival (TDOA) techniques for UMTS are presented
Original languageEnglish
Title of host publicationFirst International Conference on 3G Mobile Communication Technologies, 2000 (Conf. Publ. No. 471)
Number of pages5
Publication statusPublished - 2000


  • log normal distribution CODIT propagation model, LOS probabilities, LOS to nonline of sight power ratios, NLOS excess propagation time delay, TDOA, UMTS, cell level effects, cellular radio, channel model implementation, flat terrain, hilly terrain, idle period downlink, line of sight probabilities, local level effects, location services evaluation, location services simulation, log normal distribution, out of cell radio propagation/coverage, path loss model, radiowave propagation, shadowing effects, simulation results, spatial correlation factors, stochastic channel modelling, time difference of arrival, two level channel model


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