Low delay spread multi-path cancellation for 3G WCDMA
WISICT '04 Proceedings of the winter international synposium on Information and communication technologies
Cramér-Rao lower bounds for the synchronization of UWB signals
EURASIP Journal on Applied Signal Processing
A random perturbation-based scheme for pairwise key establishment in sensor networks
Proceedings of the 8th ACM international symposium on Mobile ad hoc networking and computing
Channel tracking using particle filtering in unresolvable multipath environments
EURASIP Journal on Applied Signal Processing
EURASIP Journal on Advances in Signal Processing
Proceedings of the 4th International Conference on Testbeds and research infrastructures for the development of networks & communities
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This paper deals with the problem of channel tracking for RAKE receivers in propagation environments characterized by closely spaced multipath components. After outlining why conventional single-path channel tracking algorithms fail in such scenarios, several new estimation algorithms are developed that are tailored to channels with closely spaced multipaths. This is achieved by removing or minimizing self-interference caused by multipath components. Other interfering users are treated as noise. Both timing tracking and phasor tracking and their interaction are covered in this paper. The derived algorithms are benchmarked against perfect channel knowledge on one hand and conventional tracking algorithms on the other hand, both in a UMTS test scenario. In moderate scenarios, the use of these new algorithms leads to performance improvements of up to 2 dB, in terms of signal-to-noise ratio (SNR) at moderate bit error rates, and even manages to track the channel in conditions where conventional tracking algorithms fail completely