Cyclostationarity-based doppler spread estimation in mobile fading channels
Document Type
Article
Publication Date
5-22-2009
Abstract
The Doppler spread, or equivalently, the mobile speed, is a measure of the spectral dispersion of mobile fading channel. Accurate estimation of the mobile speed is of importance in wireless mobile applications which require the knowledge of the rate of channel variations. This paper exploits the inherent cyclostationarity of linearly modulated signals, transmitted through fading channels, to design robust blind and data-aided mobile speed estimators. Two categories of cyclic-correlationand cyclic-spectrum-based methods are developed. Extension to space-time speed estimation at the base station in macrocells is also provided. In comparison with the existing methods, the new estimators can be used without any need for pilot tones, and are robust to additive stationary noise or interference of any color or distribution. Unlike the conventional multi-antenna based method, the proposed space-time speed estimator does not assume the receiver noise to be spatially white. We also devised a suboptimal training sequence for pilot-symbol assisted methods, to reduce the estimation error. The performances of the proposed estimators are illustrated via extensive Monte Carlo simulations. © 2009 IEEE.
Identifier
65649087915 (Scopus)
Publication Title
IEEE Transactions on Communications
External Full Text Location
https://doi.org/10.1109/TCOMM.2009.04.070255
ISSN
00906778
First Page
1061
Last Page
1067
Issue
4
Volume
57
Recommended Citation
Zhang, Hong and Abdi, Ali, "Cyclostationarity-based doppler spread estimation in mobile fading channels" (2009). Faculty Publications. 12076.
https://digitalcommons.njit.edu/fac_pubs/12076