Method for estimating hidden channel parameters of a GNSS navigation signal received in a multipath environment

US8471764B2 · kind B2 · utility

Assignee

• DEUTSCHES ZENTRUM FÜR LUFT—UND RAUMFAHRT E.V. · DE

Inventors

• Bernhard Krach · Hilpoltstein, DE
• Michael Lentmaier · Munich, DE
• Patrick Robertson · San Jose, US

Key dates

• Filing date: Mar 25, 2009
• Grant date: Jun 25, 2013
• Expiry date: Dec 16, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S19/22
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for estimating hidden channel parameters of a GNSS navigation signal received in a multipath environment includes a sequential Bayesian estimation. A movement model forms the basis of the estimation and is designed especially for dynamic channel scenarios and takes into account the speeds of change and the variable life cycles of the path. The estimator is implemented as a recursive Bayesian filter for a combined determination of positions and suppression of multipaths. The binding of the delay of the direct path is taken into consideration via position and clock parameters. The method is carried out with GNSS satellite navigation receivers, e.g. GPS and Galileo. With the method, multipath error of received GNSS navigation signals is reduced. The multipath channel includes a direct path and Nm-I echo signals and each of these paths may be considered on or off for the estimation.