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原文传递 A study of GPS measurement errors due to noise and multipath interference for CGADS

题名：	A study of GPS measurement errors due to noise and multipath interference for CGADS
作者：	Axelrad, Penina; MacDoran, Peter F.; Comp, Christopher J., et al.
关键词：	measurement；gads；multi；study；ipat；noise；path；tipa；inter；rfer
摘要：	This report describes a study performed by the Colorado Center for Astrodynamics Research (CCAR) on GPS measurement errors in the Codeless GPS Attitude Determination System (CGADS) due to noise and multipath interference. Preliminary simulation models fo the CGADS receiver and orbital multipath are described. The standard FFT algorithms for processing the codeless data is described and two alternative algorithms - an auto-regressive least squares (AR-LS) method, and a combined adaptive notch filter least squares (ANF-ALS) method, are also presented. Effects of system noise, quantization, baseband frequency selection, and Doppler rates on the accuracy of phase estimates with each of the processing methods are shown. Typical electrical phase errors for the AR-LS method are 0.2 degrees, compared to 0.3 and 0.5 degrees for the FFT and ANF-ALS algorithms, respectively. Doppler rate was found to have the largest effect on the performance.
报告类型：	科技报告