Very‐Long‐Baseline Interferometry

Thompson, Alexander; Moran, J. M.; Swenson, George W.

doi:10.1002/9783527617845.ch9

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Constructing a continuous phase time history from TDMA signals for opportunistic navigation

Pesyna

Kassas

Humphreys

2012

Proceedings of the 2012 IEEE/ION Position, Location and Navigation Symposium

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Abstract-The phase reconstruction technique presented here combines an integer least squares technique for estimating phase ambiguities at the beginning of each TDMA phase burst with a Kalman filter and smoother for removing these ambiguities and optimally "stitching" the bursts together. A Monte-Carlo-type simulation and test environment has been developed to investigate the sensitivity of the proposed phase reconstruction technique to various system parameters, namely, carrier-to-noise ratio, receiver clock quality, TDMA transmitter clock quality, line-of-sight acceleration uncertainty, and TDMA burst structure. Simulation results indicate that successful carrier phase reconstruction is most strongly dependent on the TDMA burst period and on the combined phase random walk effect of the receiver and transmitter clocks, the propagation effects, and the range errors.

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