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Compensation Algorithm of DCO Cumulative Error in the GNSS Signal Generator  

Kim, Taehee (ETRI 위성항법연구실)
Sin, Cheonsig (ETRI 위성항법연구실)
Kim, Jaehoon (ETRI 위성항법연구실)
Publication Information
Journal of Satellite, Information and Communications / v.9, no.2, 2014 , pp. 119-125 More about this Journal
Abstract
In this paper, we developed the signal generator of GNSS navigation signals and analysis the performance of DCO(Digitally Clock Oscillator) compensation algorithm for cumulative distance error thorough simulation. In general, To generate a GNSS signal calculates the Doppler and Initial Pseudorange by using the location information of the receiver and the satellite. The GNSS signal generator generates a signal by determine the carrier and code output frequency using the Doppler information which is calculated as a function of time. The output frequency of the carrier and code would be used the DCO scheme. At this time, It extract the bit and code information on a for each sample by accumulating the DCO. an error of Pseudorange is generated by the cumulative error of the DCO. If Pseudorange error occurs, so that the influence to and operation of the receiver. Therefore, in this paper, we implemented the accumulated error compensation algorithm of the DCO to remove the accumulated error components DCO thereof, Pseudorange accumulated error is removed through the experiment, it was confirmed to be a high accuracy can be operated.
Keywords
DCO;
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  • Reference
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