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NEAR-FAR RESISTANT PSEUDOLITE RANGING USING THE EXTENDED KALMAN FILTER

International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / Pseudolites have been proposed for augmentation/replacement of the GPS system in radiolocation
applications. However, a terrestrial pseudolite system suffers from the near-far effect due to received
power disparities. Conventional code tracking loops as employed in GPS receivers are unable to
suppress near-far interference. Here, a multiuser code tracking algorithm is presented based on the
extended Kalman filter (EKF.) The EKF jointly tracks the delays and amplitudes of multiple received
pseudolite waveforms. A modified EKF based on an approximate Bayesian estimator (BEKF) is also
developed, which can in principle both acquire and track code delays, as well as detect loss-of-lock.
Representative simulation results for the BEKF are presented for code tracking with 2 and 5 users.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/606488
Date10 1900
CreatorsIltis, Ronald A.
ContributorsUniversity of California
PublisherInternational Foundation for Telemetering
Source SetsUniversity of Arizona
Languageen_US
Detected LanguageEnglish
Typetext, Proceedings
RightsCopyright © International Foundation for Telemetering
Relationhttp://www.telemetry.org/

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