Title :
SNR-independent maximum Doppler frequency estimators with bandwidth adjustment technique
Author :
Yu, Hyunkya ; Park, Goohyun ; Cho, Myeon-gyun ; Hong, Dasik
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul
Abstract :
Information of the maximum Doppler frequency enable to optimize many channel-adaptive techniques and radio resource management methods for mobile radio communication systems. In this paper, we propose four maximum Doppler frequency estimators which are based on the level crossing rate (LCR), the zero crossing rate (ZCR), the covariance function (COV) and the autocorrelation function (ACF). To eliminate the influence of additive noise, we analyze the conditions for the estimators independent of the signal-to-noise ratio (SNR) and implement the conditions with a downsampling process in the time domain. The proposed methods achieve good SNR-independent performance in the Rayleigh fading channels
Keywords :
Doppler effect; Rayleigh channels; correlation methods; frequency estimation; mobile radio; time-domain analysis; ACF; COV; LCR; Rayleigh fading channel; ZCR; autocorrelation function; bandwidth adjustment technique; channel-adaptive technique; covariance function; downsampling process; level crossing rate; maximum Doppler frequency estimator; mobile radio communication system; resource management method; time domain; zero crossing rate; Additive noise; Autocorrelation; Bandwidth; Frequency estimation; Land mobile radio; Optimization methods; Resource management; Signal analysis; Signal to noise ratio; Time domain analysis;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on
Conference_Location :
Berlin
Print_ISBN :
9.7838007291e+012
DOI :
10.1109/PIMRC.2005.1651906
