GNSS receiver design testing

摘要

A GNSS receiver design is tested, which design includes software for generating position/time related data (DPT) based on raw digital data (dRAW) when the software is executed in a processing unit of the receiver. GNSS signals (SRF) are received via a radio frequency input device while moving the radio frequency input device along a route trajectory. The received GNSS signals (SRF) are fed to a radio-frequency front end of a Representative example of a receiver unit built according to the design to be tested. The radio-frequency front end produces raw digital data (dRAW) representing the received GNSS signals (SRF), and the raw digital data (dRAW) are stored in a primary data storage as a source file (Fsc). The source file (Fsc) is read from the primary data storage, and the source file (Fsc) is processed by means of the software to generate at least one set of position/time related data (DPT). Each set of position/time related data (DPT) is stored to a respective result file (Fres), and the result file(s) (Fres) is/are evaluated against reference data (Dref) to determine the performance of the design.

主权项

1. A system for testing a GNSS receiver design, the system comprising:
a radio-frequency front end that is representative of a type of radio-frequency front end to be included in a receiver unit built according to the GNNSS receiver design to be tested, the radio-frequency front end being configured to receive radio signals and based thereon produce raw digital data (dRAW); a primary data storage configured to store the raw digital data (dRAW) representing GNSS signals (SRF) received by the radio-frequency front end as a source file (Fsc); software stored in a non-transitory storage medium, said software is associated with the GNSS receiver design to be tested and is configured to generate position/time related data (DPT) based on the raw digital data (dRAW) when the software is executed; and at least one test processing unit configured to: read the source file (Fsc) from the primary data storage, process the source file (Fsc) using the software to generate position/time related data (DPT), wherein the source file (Fsc) is processed in at least two processing runs of the software starting at different offsets from the beginning of the source file (Fsc), wherein the different offsets are uniformly distributed within a predetermined time period without synchronization to increase the statistical confidence of the generated position/time related data (DPT); store each processing run comprising the position/time related data (DPT) resulting from the processing run to a respective result file (Fres); and evaluate each of the result files (Fres) against reference data (Dref).