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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Closas, P. Fernandez-Prades, C. Fernandez-Rubio, J.A. |
| Copyright Year | 2006 |
| Description | Author affiliation: Dept. of Signal Theor. & Commun., Univ. Politecnica de Catalunya, Barcelona (Closas, P.; Fernandez-Prades, C.; Fernandez-Rubio, J.A.) |
| Abstract | In direct-sequence spread-spectrum (DS-SS) navigation based systems, multipath can degrade seriously synchronization performance causing time delay and code phase estimates, to deviate from the actual value. This bias depends on the relative amplitudes and delays of multipath replicas with respect to the direct signal. The error in the estimated position due to multipath, when using a standard delay lock loop, can be on the order of several tens of meters, which is a critical aspect in high-precision applications. This works presents a sequential Monte Carlo based algorithm which tries to iteratively estimate complex amplitudes and delays of the direct signal and multipath replicas by characterizing the posterior probability density function of these parameters relying on particle filter theory. Simulations are presented for navigation systems, which are particular applications of DS-SS systems |
| Sponsorship | The Inst. of Electr. and Electron. Eng., Inc. Circuits and Syst. Soc. (IEEE CASS) |
| File Size | 175276 |
| File Format | |
| ISBN | 142440469X |
| ISSN | 15206149 |
| DOI | 10.1109/ICASSP.2006.1660922 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2006-05-14 |
| Publisher Place | France |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Bayesian methods Navigation Particle filters Delay estimation Spread spectrum communication Degradation Delay effects Phase estimation Tracking loops Monte Carlo methods |
| Content Type | Text |
| Resource Type | Article |
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