Position domain dual-frequency carrier smoothed code filter with colored noise

doi:10.13474/j.cnki.11-2246.2019.0068

Abstract

Abstract: Carrier smoothing code algorithm is an effective data processing technology in global navigation satellite system,which has been widely used in many high-precision real-time applications.In the traditional algorithms,the colored noise of the time-differenced carrier phase is neglected.In order to resolve this issue,a range domain and position domain dual-frequency carrier smoothed code algorithm under the condition of colored noise with the finite impulse response in the recursive least-squares theory framework are proposed.Firstly,the conventional dual-frequency carrier smoothed code algorithm is introduced.Based on this,the algorithms of range domain and position domain carrier smoothed code in the recursive least-squares theory as well as the influence of colored noise are given.A real GPS experiment was made to test the validity of new algorithm.Experiment results indicate the carrier smooth code algorithm is able to improve the precision of pseudo-range observations.Compared with the conventional algorithm,both the smoothing accuracy of range domain filtering and position domain filtering are improved,the accuracy of 3-dimensional positioning error is improved.At the same time,it shows that the colored noise of the time-differenced carrier phase has a certain influence on the smoothing accuracy.

Key words: dual-frequency carrier smoothed code, range domain, position domain, recursive least-squares estimate, colored noise

CLC Number:

P207
P228

LUO Fei, CHANG Guobin, CHEN Chao. Position domain dual-frequency carrier smoothed code filter with colored noise[J]. 测绘通报, 2019, 0(3): 6-10,60.

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