Discrete-time signal processing
Discrete-time signal processing
Multirate Digital Signal Processing: Multirate Systems, Filter Banks, Wavelets
Multirate Digital Signal Processing: Multirate Systems, Filter Banks, Wavelets
Analysis of DFT-Based Channel Estimators for OFDM
Wireless Personal Communications: An International Journal
Two-Dimensional Pilot-Symbol-Aided Channel Estimation by Wiener Filtering
ICASSP '97 Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '97)-Volume 3 - Volume 3
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
Channel estimation for OFDM systems with transmitter diversity in mobile wireless channels
IEEE Journal on Selected Areas in Communications
Transmitter diversity for OFDM systems and its impact on high-rate data wireless networks
IEEE Journal on Selected Areas in Communications
Bandwidth efficient OFDM transmitter diversity techniques
EURASIP Journal on Applied Signal Processing
Iterative EM-based channel estimation for STBC-OFDM
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Study on MIMO schemes for 3G-LTE downlink
WSEAS TRANSACTIONS on COMMUNICATIONS
MWS'09 Proceedings of the 2009 IEEE conference on Mobile WiMAX
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Space-time coded orthogonal frequency division multiplexing (OFDM) transmitter diversity techniques have been shown to provide an efficient means of achieving near optimal diversity gain in frequency-selective fading channels. For these systems, knowledge of the channel parameters is required at the receivers for diversity combining and decoding. In this paper, we propose a low complexity, bandwidth efficient, pilot-symbol-assisted (PSA) channel estimator for multiple transmitter OFDM systems. The pilot symbols are constructed to be nonoverlapping in frequency to allow simultaneous sounding of the multiple channels. The time-varying channel responses are tracked by interpolating a set of estimates obtained through periodically transmitted pilot symbols. Simulations are used to verify the effectiveness of the propsed estimator and to examine its limitations. It is also shown decision-directed minimum mean square error MMSE channel estimator for OFDM transmitter diversity systems.