A modified covariance-based mobile velocity estimation method for Rician fading channels

• Published in: IEEE communications letters Vol. 9; no. 8; pp. 706 - 708
• Main Authors: PARK, Goohyun, NAM, Sangho, YU, Takki, HONG, Daesik, KANG, Changeon
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Detection, estimation, filtering, equalization, prediction; Exact sciences and technology; Fading; Frequency estimation; Information technology; Information, signal and communications theory; Proposals; Rayleigh channels; Rayleigh scattering; Rician channels; Robustness; Signal and communications theory; Signal, noise; System performance; Telecommunications and information theory; Wireless communication; Fading channels; Parameter estimation; Wireless telecommunication; COV; Doppler frequency; Simulation; covariance-based; Rician channels; velocity estimation; Maximum Doppler frequency; MCOV; Rician fading channel; Autocovariance
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2005.1496589

This paper contains our proposal for a novel velocity estimation method based on the auto-covariance of the received signal and that of the squared envelope. This modified covariance-based (MCOV) estimator exhibits unbiased characteristics in a Rician fading environment. Moreover, it requires no other channel information, such as Rician factors or the angle of arrival (AoA). The authors also propose a scaling technique which can improve the performance of the MCOV method in a Rayleigh fading environment. When coupled with the scaling technique, the new method demonstrates robust performance in both the Rayleigh and Rician fading environments.