Title :
Speed estimation in wireless systems using wavelets
Author :
Narasimhan, Ravi ; Cox, Donald C.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
A new technique is described for estimating the speed of a mobile station in a wireless system. The mobile speed maps the characteristic spatial scale of the received signal into a characteristic temporal scale. The continuous wavelet transform tracks changes in the temporal scale to estimate the mobile speed as a function of time. This technique requires neither knowledge of the average received power of the nonstationary signal nor adaptation of a temporal observation window, in contrast to other speed estimators given in the literature. Simulations show the tracking of a variable speed profile
Keywords :
Rayleigh channels; land mobile radio; parameter estimation; radio tracking; radiowave propagation; wavelet transforms; characteristic spatial scale; characteristic temporal scale; continuous wavelet transform; correlated Rayleigh fading; correlated lognormal shadowing; mobile speed estimation; mobile station; propagation model; simulations; variable speed profile tracking; wireless systems; Base stations; Continuous wavelet transforms; Control systems; Frequency estimation; Macrocell networks; Microcell networks; Rayleigh channels; Shadow mapping; Wavelet transforms; Wireless communication;
Journal_Title :
Communications, IEEE Transactions on
