Title :
Improvement and Performance Analysis of a Scheme for the Maximum Doppler Frequency Estimation
Author :
Sha, Yi ; Yao, Na ; Xu, Xiaojing
Author_Institution :
Dept. of Commun. & Inf. Syst., Northeastern Univ., Shenyang
Abstract :
In this paper, an optimal signal-to-noise ratio (SNR) which is independent from correlation-interval and mobile speed is analyzed, which is on the basis of the channel auto-correlation Doppler shift estimation algorithm. And then an optimized SNR tracking (OSNRT) algorithm on the basis of Rake receiver under multi-path fading channel is proposed. The improved algorithm calculated Doppler shift by selecting a finger whose SNR is nearest to the optimal SNR. Simulation results show that contrasted to conventional schemes the proposed approach is less sensitive to correlation-interval and velocity varieties.
Keywords :
Doppler shift; error analysis; fading channels; frequency estimation; mobile communication; multipath channels; radio receivers; Doppler frequency estimation; OSNRT algorithm; RAKE receivers; correlation interval; error analysis; mobile speed; multipath fading channel; optimal signal-to-noise ratio tracking; Algorithm design and analysis; Autocorrelation; Doppler shift; Fading; Fingers; Frequency estimation; Multipath channels; Performance analysis; Signal analysis; Signal to noise ratio;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.497
