Global Navigation Satellite Systems Engineering, Policy, and Design
When a plane attempts to land at the airport in poor visibility, signals from the instrument landing system (ISL) will help safely guide the aircraft to the ground. Such terrestrial air landing systems must be tested to ensure the navigation they’re providing is reliable.
By Renee Knight
Test and measurement specialist Rohde & Schwarz and Swedish over-the-air (OTA) reverberation test system manufacturer Bluetest are cooperating on assisted global navigation satellite system (A-GNSS) OTA testing concepts for antenna measurements. The proof of concept solution integrating the Rohde & Schwarz LBS Server and Bluetest OTA test solution was demonstrated at Rohde & Schwarz headquarters in Munich, Germany.
By Inside GNSS
Test and measurement equipment supplier Rohde & Schwarz has further expanded the capabilities of its R&S CMW500 wideband radio communication tester and R&S SMBV100A GNSS simulator to support Global Certification Forum (GCF) protocol conformance tests for C-V2X (cellular vehicle-to-everything) device certification.
Using the Qualcomm(R) 9150 C-V2X chipset solution from Qualcomm Technologies, the R&S CMW500 acting as LTE network simulator now allows automakers to test C-V2X direct communications (PC5) according to GCF Work Item 281.
3GPP Release 14 specifies the direct communications specifications for C-V2X PC5, which enables vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P) and vehicle-to-infrastructure (V2I) safety applications, and does so without a mobile cellular subscription or network assistance and operates in ITS bands 46D (5.8 GHz) and 47 (5.9 GHz).
The new R&S CMW-KK550 test package includes the 3GPP protocol conformance tests from LTE-V2V GCF Work Item 281 and LTE-V2X GCF Work Item 282. As recently announced, the R&S CMW-KU514 C-V2X software package on the R&S CMW500 is used to verify data transmission and reception over the PC5 interface in ideal, faded and congested channel conditions. Together, both packages enable Rohde & Schwarz to support C-V2X device testing through all protocol layers.
C-V2X device testing is a significant step towards achieving the goal of having fully connected and autonomous vehicles to improve public safety and increase traffic efficiency. C-V2X, including direct communications for safety applications, complements network-based communications that deliver telematics services and various use cases for connected infotainment and over-the-air software updates.
“C-V2X PC5 radio technology has quickly advanced to a pre-commercial stage, and Rohde & Schwarz is pleased to be the first test equipment vendor to offer a comprehensive C-V2X test suite. The automobile industry can now verify functionality and performance of C-V2X devices, as well as start device testing as per 3GPP protocol conformance tests,” said Anton Messmer, vice-president, mobile radio testers at Rohde & Schwarz. “This expanded capability complements our support for European eCall and shows our long-standing support for automotive applications.”
By Inside GNSS
The R&S SMW200A GNSS simulator from Rohde & Schwarz.Today, an increasing number of GNSS receivers are able to process signals from diverse navigation systems such as GPS, GLONASS, Galileo or BeiDou in several frequency bands — and in some cases with several antennas in parallel — in order to improve positioning accuracy. Accuracy can be further improved with differential GNSS (DGNSS) techniques.
By Inside GNSS
The R&S TS-LBS is a test system for testing GNSS and network-based LBS. Photo: Rohde & Schwartz.Rohde & Schwarz and MediaTek have successfully completed the verification of location based services (LBS) in the U-plane and C-plane for A-BeiDou (Assisted BeiDou), China’s GNSS satellite positioning system. The R&S TS-LBS test solution is designed to allow mobile manufacturers, chipset manufacturers, test houses and network operators to verify chipsets and mobile devices in order to obtain permission to operate them in a particular network.
By Inside GNSS
