Random sign repetition time-hopping UWB with multiuser detection
EURASIP Journal on Wireless Communications and Networking
Design and performance evaluation of a full-duplex operating receiver for time-hopping UWB
Mobile Networks and Applications
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Mobile Networks and Applications
Signal Processing - Signal processing in UWB communications
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Joint Parameter Estimation for UWB Energy Detectors Using OOK
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Multiuser channel estimation for ultra-wideband systems using up to the second-order statistics
EURASIP Journal on Applied Signal Processing
Comparison between coherent and noncoherent receivers for UWB communications
EURASIP Journal on Applied Signal Processing
A subspace approach to blind multiuser detection for ultra-wideband communication systems
EURASIP Journal on Applied Signal Processing
Timing acquisition with noisy template for ultra-wideband communications in dense multipath
EURASIP Journal on Applied Signal Processing
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EURASIP Journal on Applied Signal Processing
Cramer-Rao bounds for channel estimation in UWB impulse radio
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A Sliding Window Method with Iterative Tuning for Channel Estimation of UWB Signals
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IEEE Transactions on Communications
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IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
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EURASIP Journal on Wireless Communications and Networking - Special issue on synchronization in wireless communications
IEEE Journal on Selected Areas in Communications - Special issue on realizing GBPS wireless personal area networks
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IEEE Transactions on Signal Processing
EURASIP Journal on Wireless Communications and Networking
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ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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IEEE Transactions on Communications
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IEEE Transactions on Wireless Communications
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IEEE Transactions on Wireless Communications
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IEEE Transactions on Wireless Communications
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IEEE Transactions on Communications
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Channel estimation using Kalman filter for UWB communication systems
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Iterative synchronization of multiuser ultra-wideband signals
IEEE Transactions on Wireless Communications
Fast multi-symbol based iterative detectors for UWB communications
EURASIP Journal on Advances in Signal Processing - Special issue on advanced equalization techniques for wireless communications
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EURASIP Journal on Wireless Communications and Networking
Journal of Network and Computer Applications
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Wireless Personal Communications: An International Journal
Ant intelligence inspired blind data detection for ultra-wideband radar sensors
Information Sciences: an International Journal
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This paper deals with channel estimation in ultra-wideband communications operating in a multipath environment and in the presence of multiaccess interference. The channel parameters are the attenuations and delays incurred by the signal echoes along the propagation paths. Time-hopping modulation with binary symbols is assumed. The estimation method is based on the maximum-likelihood criterion and is applied to two different scenarios: either with known symbols (DA estimation) or with unknown symbols (NDA estimation). The effects of the estimation errors on the performance of a RAKE receiver are assessed by simulation by comparing the receiver bit-error rate with either perfect channel estimates or imperfect estimates as obtained from the proposed algorithms. The results show that the degradations are tolerable as long as the number of users is limited. They also show that the DA method has an edge over the NDA in that it can handle a larger number of users for a fixed degradation. The number of users that can be accommodated in practice is found for some values of the system parameters.