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Data Wipe Off Method Using a Carrier Phase Discriminator for Deeply Coupled GPS/INS Integrated Navigation Systems  

Jeong, Ho-Cheol (Department of Electronics Engineering, Chungnam National University)
Kim, Jeong-Won (Korea Aerospace Research Institute)
Hwang, Dong-Hwan (School of Electrical and Computer Engineering, Chungnam National University)
Lee, Sang-Jeong (School of Electrical and Computer Engineering, Chungnam National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.45, no.6, 2008 , pp. 77-81 More about this Journal
Abstract
In the deeply coupled GPS/INS integrated systems, if the integration filter update period is longer than the period of GPS navigation data, the loss of correlation values occurs due to the bit transition. This problem can be resolved when data wipe off(DWO) is used. However, general DWO methods requires heavy computation or cannot be applied continuously. This paper proposes an effective DWO method using carrier phase discriminator In order to show validity of the proposed method, simulations were carried out. The simulation results show that the data bit is accurately estimated and conform that the loss of correlation values and the error of code phase is small.
Keywords
Deeply Coupled; PIT; Data bit; Data wipe off; Computation load; Discriminator;
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