Newsletter | January 27, 2021

01.27.21 -- Direction-Finding Technologies, Methodologies, And More

An Introduction To Direction-Finding Methodologies

The choice of an appropriate direction-finding methodology to use for a given application is largely a function of the target signal's characteristics, such as frequency and modulation, but is also influenced by the propagation environment as well as cost and complexity. Recent advances in the development of hybrid direction-finding methodologies attempt to overcome some of these restrictions and increase accuracy by using a combination of methodologies.

Reliable And Flexible Simulation Of Angle Of Arrival

For EW engineers, it is highly desirable that they have a simulator in their hands that can provide test signals for simulating the angle of arrival (AOA). This is necessary from the very beginning of the design phase but is not without its complications. This article presents a solution designed to meet the challenges associated with simulating the AOA of radar signals.

Effortless Testing Of Direction-Finding Devices — Amplitude Based

A radar warning receiver (RWR) is an essential part of the self-defense suite of every modern military aircraft. Developing and testing of RWRs would be difficult without a simulator that can generate all the test signals needed throughout the development cycle of the receiver. This article describes a test solution for testing devices that uses amplitude comparison techniques.

DF Accuracy Requirements For Monitoring Stations

Radio direction finders (DF) in spectrum monitoring are widely used to locate transmitters such as radio frequency (RF) interferers and unlicensed broadcasting stations. This article focuses on triangulation since this method is used in the vast majority of use cases and applications.

Spectrum Monitoring With Hybrid AOA/TDOA Geolocation

New spectrum monitoring systems and sites can be configured with angle of arrival (AOA), with time difference of arrival (TDOA), or with hybrid technology. This offers best adaptability to the needs and the environments; it provides highest geolocation accuracy at a minimum number of stations. This article summarizes the differences between these two locating methods along with the reasons for combining AOA with TDOA.