Title :
Estimation of maximum Doppler frequency for handoff decisions
Author :
Sampath, Ashwin ; Holtzman, Jack M.
Author_Institution :
WINLAB, Rutgers Univ., Piscataway, NJ, USA
Abstract :
A previous paper considered the problem of adaptively determining the measurement averaging interval for handoffs through the estimation of the maximum Doppler frequency, fD. The investigation is continued with refined estimates for fD and approaches to bias correction. An exact analysis for the fD estimate as a function of the squared deviations of the logarithmically compressed signal envelope is presented. An extension of the algorithm for robustness in a Rician fading environment is given. The performance of the algorithm in the presence of additive Gaussian noise is analyzed. The role of the noise bandwidth is quantified. The effect of cochannel interference on the estimate is negligible
Keywords :
Doppler measurement; Gaussian noise; Rician channels; adaptive estimation; cellular radio; cochannel interference; fading; land mobile radio; Rician fading; additive Gaussian noise; algorithm; bias correction; cochannel interference; handoffs; logarithmically compressed signal envelope; maximum Doppler frequency; measurement averaging interval; noise bandwidth; performance; robustness; Additive noise; Algorithm design and analysis; Frequency estimation; Frequency measurement; Gaussian noise; Noise robustness; Performance analysis; Rician channels; Signal analysis; Working environment noise;
Conference_Titel :
Vehicular Technology Conference, 1993., 43rd IEEE
Conference_Location :
Secaucus, NJ
Print_ISBN :
0-7803-1267-8
DOI :
10.1109/VETEC.1993.510946
