Abstract
An improved vector tracking loop is proposed to solve the carrier phase tracking problem of typical INS/GNSS ultra-tight integrated system, in which the carrier phase residual cannot be tracked properly and the navigation message demodulation cannot be conducted. Federated filter architecture of ultra-tight integration composed by pre-filters and integration filter is adopted. A non-coherent pre-filter is modeled for carrier phase tracking, of which the gain is adjusted by carrier-to-noise ratio adaptively. The carrier phase, frequency and code phase are vector tracked by pre-filter and navigation filter estimation concurrently. Experimental results indicate that the proposed vector tracking loop can improve the carrier phase tracking performance, eliminate the carrier phase residual of typical vector tracking solution effectively, with a satisfactory dynamic tracking performance.
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Li, W., Xia, J., Cheng, G. (2017). An Improved Vector Tracking Loop of Ultra-Tight Integration for Carrier Phase Tracking. In: Sun, J., Liu, J., Yang, Y., Fan, S., Yu, W. (eds) China Satellite Navigation Conference (CSNC) 2017 Proceedings: Volume II. CSNC 2017. Lecture Notes in Electrical Engineering, vol 438. Springer, Singapore. https://doi.org/10.1007/978-981-10-4591-2_38
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DOI: https://doi.org/10.1007/978-981-10-4591-2_38
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