Interference Hunting & Monitoring

Finding RF interferers is no doubt a tricky discipline to master. Fortunately, every interferer leaves a RF foot-print that gives us a hint as to what type of interferer it is. It’s the job of the RF interference hunter to recognize this foot-print and trace it back to a known interferer so that it can be physically located and dealt with. This is not an easy task as the symptoms of RF interference can be complex by nature, often masked by other sources or RF energy. To be good at interference hunting requires not only the right tools, but a robust knowledge base of what certain interferers’ signals look like under certain conditions. This type of knowledge can take years to develop with countless hours in the field – hence why interference hunting is often regarding more as an art than a science. So how do you develop this real-world knowledge? This is where we come in. We can help jump start your learning by giving you direct access to our technical interference hunting experts who have worked countless hours in the field identifying and resolving RF interference issues for hundreds of companies such as yourselves.

White Papers

The ability to efficiently detect, analyze and locate sources of radio-frequency interference has become increasingly important in modern wireless networks. Unlike constant or near-constant sources, so-called short-duration interferers can only be detected for brief periods of time and therefore special tools and techniques are often required when searching for these types of signals. This paper discusses the causes and characteristics of short-duration interferers and the most effective methodologies for resolving them in an effective and timely manner.
Oscillation caused by insufficient path loss between a bidirectional amplifier’s (BDA) donor and serving antennas is one of the most common and most serious forms of interference in cellular networks. This white paper provides a general overview of how BDAs work, the conditions leading to oscillation, and practical information for identifying and locating oscillating BDAs.
In this white paper, we will explore the topic of interference hunting beginning with a broad overview of the topic and then leading to a more practical discussion on the different types of interferers, analysis of interferers and the tools that are often used in the field to perform interference hunting.
This white paper offers an understanding of LTE technology and the means by which LTE-related interference can be identified, localized, and resolved – critical efforts for the efficient operation of both cellular and cable networks.
Over the last year, awareness of LTE/cable-related interference issues has grown substantially in both the cable and the wireless/cellular industry. This white paper discusses the results of continued field trials and studies in the area of LTE/cable interference and presents information regarding ongoing LTE developments that may have an impact on cable systems such as signal ingress and egress, the use of repeaters and femtocells, and the development of the LTE Advanced architecture.


Applications

This application brochure serves as a guideline and manual for mobile radio network field technicians and radio engineers tasked with detecting radio interference. Rohde & Schwarz offers a comprehensive product portfolio for the analysis of various mobile radio network systems including 2G, 3G and next-generation wireless-communications technologies
This application brochure describes the procedure for locating a signal source using an R&S®PR100 portable receiver and an R&S®HE300 active directional antenna.
This application brochure describes how the R&S®DDF007 can be used as a fixed or mobile DF station, or as a portable manual direction finder for indoor applications, and can be reconfigured within minutes to meet the requirements of a given task. The R&S®DDF007 comes with a wide range of powerful software options and add-ons, making it an excellent choice for all applications that call for a compact and flexible yet powerful DF system. directional antenna.


Videos

Although many types of interference are common to all radio access technologies, the combination of new frequency allocations and new modulation types have created unique interference challenges for LTE deployments in the United States. This webinar uses real-world examples to discuss the most common sources of interference found in LTE networks today (such as bidirectional amplifiers, cable egress, fluorescent lighting, etc.) and how they can be most effectively identified and located.
The rapid spread of wireless technologies has resulted in an increase in interference issues. In today's highly competitive mobile market, timely and efficient resolution of these issues is critical for operators to deliver a high quality of experience. This presentation discusses the impact of interference on operators, common sources and types of interference, fundamentals of radiolocation/direction finding, the use of signal analysis, interference hunting tools, and general suggestions/best practices for the engineer in the field.
Direction finding (or radiolocation) is an essential part of interference hunting and spectrum management activities. This presentation provides a technical introduction to the area of radio direction finding and discusses the fundamental principles of direction finding in the most common DF methodologies, including manual direction finding, Doppler, time difference of arrival, Watson-Watt, and correlative interferometry. In addition to comparing the relative strengths and weaknesses of each technology, recent developments and advances in direction finding technology and their field applications are also presented and discussed.
The rapid spread of wireless technologies has been accompanied by an increase in interference issues. Timely and efficient resolution of these issues is critical in avoiding service interruptions and in guaranteeing quality of service. This webinar will discuss common sources and types of interference, fundamentals of radiolocation/direction finding, general suggestions/best practices for the engineer in the field, and more.