Specifications

ContentsGPS and Assisted GPS
3Operating Manual 1171.5248.12 ─ 15
Contents
1 Preface....................................................................................................7
1.1 Documentation Overview.............................................................................................7
1.2 Typographical Conventions.........................................................................................8
2 Introduction............................................................................................9
2.1 GPS system parameters...............................................................................................9
2.2 Assisted GPS (A-GPS)................................................................................................10
2.3 Use of navigation data................................................................................................11
2.4 Functional Overview Option GPS (R&S-K44)...........................................................11
2.4.1 Real-time generation.....................................................................................................12
2.4.2 Multi-satellite GPS signal..............................................................................................12
2.4.3 Generation of realistic GPS scenarios..........................................................................12
2.4.4 Signal generation with projection of the ephemeris navigation data.............................13
2.4.5 Satellite handover.........................................................................................................13
2.4.6 Real-Time S.P.O.T. display...........................................................................................14
2.4.7 Multipath signal generation...........................................................................................14
2.5 Enhancements of Option Assisted GPS (R&S-K65)................................................14
2.5.1 Prerequisites.................................................................................................................14
2.5.2 Full set of pre-defined test scenarios for A-GPS 2G/3G Protocol and Conformance Test
Cases............................................................................................................................14
2.5.3 Custom build scenarios.................................................................................................15
2.5.4 Generation of assistance data......................................................................................15
2.5.5 Simulation of Moving Receivers....................................................................................15
2.6 Moving Scenarios.......................................................................................................16
2.6.1 Waypoint file's formats..................................................................................................16
2.6.2 Example of Waypoint File.............................................................................................17
2.7 Test Setups..................................................................................................................19
2.7.1 Example of A-GPS Test Setup......................................................................................19
2.8 Typical Workflows.......................................................................................................19
2.8.1 Generating GPS Signal for Simple Receiver Tests (Generic Mode).............................19
2.8.2 Generating Multipath Scenarios....................................................................................20
2.8.3 Generating GPS Signal with Flexible Simulation Time (Localization Mode Auto SV Selec-
tion)...............................................................................................................................20