An introduction to signal detection and estimation (2nd ed.)
An introduction to signal detection and estimation (2nd ed.)
A theoretical framework for soft-information-based synchronization in iterative (Turbo) receivers
EURASIP Journal on Wireless Communications and Networking - Special issue on advanced signal processing algorithms for wireless communications
Code-Assisted Synchronization for UWB-IR Systems: Algorithms and Analysis
IEEE Transactions on Signal Processing - Part II
Performance evaluation of impulse radio UWB systems with pulse-based polarity randomization
IEEE Transactions on Signal Processing
IEEE Transactions on Wireless Communications
On the performance of episodic UWB and direct-sequence communication systems
IEEE Transactions on Wireless Communications
A GLRT approach to data-aided timing acquisition in UWB radios-Part I: algorithms
IEEE Transactions on Wireless Communications
Low-complexity blind synchronization and demodulation for (ultra-)wideband multi-user ad hoc access
IEEE Transactions on Wireless Communications
Iterative ("Turbo") Multiuser Detectors for Impulse Radio Systems
IEEE Transactions on Wireless Communications
Probability of error in MMSE multiuser detection
IEEE Transactions on Information Theory
Successive interference cancellation with SISO decoding and EM channel estimation
IEEE Journal on Selected Areas in Communications
Channel estimation for ultra-wideband communications
IEEE Journal on Selected Areas in Communications
A low-rate code-spread and chip-interleaved time-hopping UWB system
IEEE Journal on Selected Areas in Communications - Part 1
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In this paper, two novel iterative chip-level synchronization methods, one blind and the other data-aided, are proposed for chip-interleaved time-hopping (TH) ultra-wideband signals that are subject to intersymbol interference (ISI) and multiple access interference (MAI). Both algorithms are soft-input, soft-output devices which receive the a posteriori probability of each chip from the minimum mean-square error (MMSE) filter that suppresses both ISI and MAI. Using this soft information and the structure of TH codes, the blind synchronizer produces the probabilities of time delays which are fed into the channel decoder. In addition to the knowledge of TH codes and the soft information coming from the MMSE filter, the data-aided synchronizer uses a training sequence in the generation of the probabilities of time delays. Although the channel decoder for chip-interleaved systems is rather simple, here it is redesigned to incorporate the soft information. The resulting receivers perform as well as iterative equalization with perfect timing information, and catch the single-user performance at moderate signal-to-noise ratios.