The R&S®SMW200A GNSS simulator offers an easy and convenient way to test your receiver design against a wide variety of potential interferers and jammers. Test cases extend from simple coexistence simulations to complex interference scenarios with localized emitters.
Integrating the R&S®SMBV100B GNSS simulator into the AVL DRIVINGCUBE™ toolchain creates new possibilities for validating advanced driver assistance systems and autonomous driving functions at the vehicle level. Combining a complete vehicle on a vehicle test bed with physical sensor stimulation results in fast, reproducible and cost-efficient testing. All possible driving scenarios can be executed under realistic and safe conditions.
The purpose of this application note is to give background information to the reader about the basics of EMC (Electromagnetic Compatibility), EMI (Electromagnetic Interference), and how it relates to installations in the real world.
The fifth generation of mobile networks (5G) is about to enable a fully connected world. With the dramatic increase in data rates and number of connected devices, users will soon be able to enjoy expanded communication between devices and no longer be limited to user-to-user and user-to-device communication. By 2025 an enormous 25 billion devices are expected to be connected under 5G.1. Download the full white paper for more information.
The implementation margin of a satellite communication system is defined as the degradation of the signal after travelling through the up and downlink equipment. In order to find this, an EbNo generator can first be used to carry out an IF loopback test of the modem in order to find bit error rate (BER) values at different Eb/No ratios. A plot of these values can then be compared with the theoretical curve for the digital modulation scheme being used. The resultant difference is termed the implementation loss of the modem, and this value is used as a reference level for the second part of the test, in which the implementation margin of the complete up and downlink is found.
Designing and implementing an active phased array antenna requires precise characterization of individual components and the integrated performance of the array. To ensure an accurate test of the intended adaptive nature of the active phased array antenna, the embedded algorithms need to be tested as well. This application note explains test procedures and offers recommendations towards characterization of the relevant parameters for active phased array antennas and their passive subsystem, as often used in applications for Mobile Communication and RADAR.
RF Filtering is a key component of any communications system to eliminate interference and out-of-band emissions. With proper filtering, multiple communications systems can be employed on a single platform, with little to no degradation in performance. This application note covers the use of RF filters to improve the performance of a communications system, with examples of RF filtering solutions for unmanned aircraft systems (UAS).
Noise Figure is defined as the amount of noise a component, amplifier, or an entire radio receive chain contributes to the RF signal being received, and is also the logarithmic unit (dB) derived from the ratio of the signal to noise ratio (SNR) into the device or circuit versus the SNR out of the device. This application note will deal with the noise figure specifically for amplifiers and chains of amplifiers, and demonstrates how to improve this NF by adding a low noise amplifier to the antenna input of a receiver.
This app note explores the basics of RF propagation, the effects of fading, multipath, and other phenomena on communication range, modulation types, and how to improve digital link distances within many unmanned aircraft systems (UAS).
Constellation diagrams are an important tool in an engineer’s arsenal when determining whether or not a digitally modulated radio frequency (RF) signal is behaving correctly and troubleshooting the underlying issues when it is not. This article delves into the fundamentals of constellation diagrams and the uses of digital modulation schemes.