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Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing
 

Summary: Hindawi Publishing Corporation
EURASIP Journal on Advances in Signal Processing
Volume 2008, Article ID 158037, 14 pages
doi:10.1155/2008/158037
Research Article
A Forward-Backward Kalman Filter-based STBC MIMO
OFDM Receiver
T. Y. Al-Naffouri and A. A. Quadeer
Electrical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
Correspondence should be addressed to A. A. Quadeer, aquadeer@kfupm.edu.sa
Received 5 May 2008; Accepted 11 December 2008
Recommended by Kostas Berberidis
Orthogonal frequency division multiplexing (OFDM) has emerged as a modulation scheme that can achieve high data rates
over frequency selective fading channel by efficiently handling multipath effects. This paper proposes receiver design for space-
time block coded MIMO OFDM transmission over frequency selective time-variant channels. Joint channel and data recovery are
performed at the receiver by utilizing the expectation-maximization (EM) algorithm. It makes collective use of the data constraints
(pilots, cyclic prefix, the finite alphabet constraint, and space-time block coding) and channel constraints (finite delay spread,
frequency and time correlation, and transmit and receive correlation) to implement an effective receiver. The channel estimation
part of the receiver boils down to an EM-based forward-backward Kalman filter. A forward-only Kalman filter is also proposed to
avoid the latency involved in estimation. Simulation results show that the proposed receiver outperforms other least-squares-based

  

Source: Al-Naffouri, Tareq Y. - Electrical Engineering Department, King Fahd University of Petroleum and Minerals
Quadeer, Ahmed Abdul - Electrical Engineering Department, King Fahd University of Petroleum and Minerals

 

Collections: Engineering