Title :
Data detection for cooperative vehicular communication systems with unknown channels
Author :
He, Lanlan ; Ma, Shaodan ; Wu, Yik-Chung ; Ng, Tung-Sang
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China
Abstract :
In this paper, data detection for an OFDM-based amplify-and-forward (AF) cooperative vehicular communication system with multiple relays is investigated. Unlike the conventional OFDM AF cooperative systems, the underlying channels experience fast time-variation due to high mobility of the source and destination. To enable data detection, the system model is first reformulated using the generalized complex exponential basis expansion model (GCE-BEM). Then a channel estimator is developed using the Tikhonov regularization method and a data detection method is proposed based on the linear minimum mean square error (LMMSE) criterion. The effectiveness of the proposed data detection algorithm is finally corroborated by computer simulations.
Keywords :
OFDM modulation; cooperative communication; mean square error methods; telecommunication channels; vehicular ad hoc networks; OFDM AF cooperative systems; OFDM-based amplify-and-forward; Tikhonov regularization method; channel estimator; computer simulations; cooperative vehicular communication systems; data detection; generalized complex exponential basis expansion model; linear minimum mean square error; unknown channels; Niobium; Amplify-and-forward (AF); Cooperative vehicular communication; Orthogonal frequency division multiplexing (OFDM); Time-varying channel;
Conference_Titel :
Electronics, Circuits, and Systems (ICECS), 2010 17th IEEE International Conference on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-8155-2
DOI :
10.1109/ICECS.2010.5724527
