A New Approach for GNSS Ambiguity Decorrelation

Qiu Zhao Zhang; Shu Bi Zhang; Wan Li Liu

doi:10.4028/www.scientific.net/AMR.403-408.1968

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 403-408A New Approach for GNSS Ambiguity Decorrelation

A New Approach for GNSS Ambiguity Decorrelation

Abstract:

Integer carrier phase ambiguity resolution is the key to fast and high-precision Global navigation satellite system(GNSS) positioning and application. LAMBDA method is one of the best methods for fixing integer ambiguity. The principle of LAMBDA is discussed. For incompleteness of Cholesky decomposition and complexity of Integer Gauss transformation, a new approach for GNSS ambiguity decorrelation is proposed based on symmetric pivoting strategy and united inverse integer strategy. The new algorithm applies symmetric pivoting strategy to ambiguity covariance matrix while doing Cholesky decomposition, then finds the inverse and integer matrix of ‘L’. This method not only uses Cholesky decomposition to improve efficiency, but also avoids complicated Integer Gauss transformations. The feasibility and advantage of the method are verified using randomly simulation covariance matrix.

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Periodical:

Advanced Materials Research (Volumes 403-408)

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1968-1971

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https://doi.org/10.4028/www.scientific.net/AMR.403-408.1968

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November 2011

Authors:

Qiu Zhao Zhang, Shu Bi Zhang, Wan Li Liu

Keywords:

Decorrelation, Global Navigation Satellite System (GNSS), Integer Ambiguity, LAMBDA

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