A Cross-Layer (Layer 2 + 3) Handoff Management Protocol for Next-Generation Wireless Systems
IEEE Transactions on Mobile Computing
Performance analysis of a novel architecture to integrate heterogeneous wireless systems
Computer Networks: The International Journal of Computer and Telecommunications Networking
Computer Networks: The International Journal of Computer and Telecommunications Networking
Handoff management in 4G networks
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Mean velocity estimation of mobile stations by spatial correlation of channels in cellular systems
IEEE Communications Letters
Cyclostationarity-based Doppler spread estimation in mobile fading channels
IEEE Transactions on Communications
Mobile speed estimation for broadband wireless communications over Rician fading channels
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
A cooperative vertical handover algorithm in integrated wireless and mobile network
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Wireless Personal Communications: An International Journal
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A novel algorithm called velocity estimation using the power spectral density (VEPSD), which uses the Doppler spread in the received signal envelope to estimate the velocity of a mobile user (MU), is introduced in this paper. The Doppler spread is estimated using the slope of the power spectral density (PSD) of the received signal envelope. The performance of the VEPSD algorithm is evaluated in both Rayleigh and Rician fading environments. The sensitivity of the estimation error to additive white Gaussian noise (AWGN), Rice factor (K), and the angle of arrival of the line-of-sight (LOS) component is analyzed and compared with the level crossing rate (LCR) and covariance-based velocity estimators. Simulation results show that VEPSD estimates the velocity of MUs accurately. It is also shown that VEPSD can be used for velocity estimation under nonisotropic scattering and is well suited for next-generation wireless systems (NGWSs).