Title :
A Channel Estimation Scheme with Switched Space-time-Frequency Orthogonal Coding for MIMO OFDM Systems
Author :
Marousis, A.D. ; Constantinou, P.
Author_Institution :
Nat.Tech.Univ. of Athens, Athens
Abstract :
This paper presents a channel estimation scheme that is designed for MIMO-OFDM systems capable of operating in time varying and frequency selective propagation channels. Orthogonality is applied, either in space- frequency, or in space-time dimensions interchangeably for both the preamble and pilot symbols. The efficiency of the system is based on the accuracy of the channel estimation and tracking process, realizing the orthogonal property by applying block coding in space- frequency domain for the preamble and in space- time one for pilot symbols. Furthermore, minimization of the processing at the receiver has been applied by estimating only the time- varying channel properties. The evaluation has been performed over the spatial channel model developed for MIMO simulations according to 802.16e case of 3GPP.25.996.
Keywords :
MIMO communication; OFDM modulation; block codes; channel estimation; MIMO OFDM systems; block coding; channel estimation; frequency selective propagation channel; pilot symbol; preamble symbol; spatial channel; switched space-time-frequency orthogonal coding; time varying propagation channel; Block codes; Channel estimation; Design engineering; Diversity methods; Forward error correction; MIMO; OFDM; Radio frequency; Robustness; Transmitters; MIMO transceivers; channel estimation and tracking; space-frequency block coding; space-time;
Conference_Titel :
Mobile Computing and Wireless Communication International Conference, 2006. MCWC 2006. Proceedings of the First
Conference_Location :
Amman
Print_ISBN :
978-9957-486-00-6
DOI :
10.1109/MCWC.2006.4375204
