Recent developments in blind channel equalization: from cyclostationarity to subspaces
Signal Processing - Special issue on subspace methods, part I: array signal processing and subspace computations
Subspace-based blind and semi-blind channel estimation for OFDMsystems
IEEE Transactions on Signal Processing
CHANNEL ESTIMATION FOR WIRELESS OFDM SYSTEMS
IEEE Communications Surveys & Tutorials
Channel models for ultrawideband personal area networks
IEEE Wireless Communications
A subspace blind channel estimation method for OFDM systems without cyclic prefix
IEEE Transactions on Wireless Communications
Subspace-based blind channel estimation for OFDM by exploiting virtual carriers
IEEE Transactions on Wireless Communications
Characterization of ultra-wide bandwidth wireless indoor channels: a communication-theoretic view
IEEE Journal on Selected Areas in Communications
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Ultra Wideband (UWB) communication is one of the key technology for high data rate networks over short range communication. The ultra wide bandwidth offers pulses with very short duration that provides frequency diversity and multipath resolution. UWB OFDM communication is proposed for physical layer in the IEEE 802.15.3a standard which covers wideband communication for wireless personal area networks (WPANs). Channel estimation is very important for OFDM based UWB system because of its coherent demodulation and channel is time varying. This paper proposes a new blind adaptive channel estimation technique based on orthogonal iteration method for UWB OFDM communication. The channel parameters are adaptively estimated in the proposed method which is based on recursive least square method. The proposed method distinguishes itself from many previously reported channel estimation methods by eliminating the training bits, thereby increasing the channel efficiency. The proposed method is compared with LS based blind channel estimation method in various aspects by computer simulations.