Mobile Wireless Learning Center

Industry Leading Interference Hunting & Monitoring Technical Content


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Presentations:

Video: Understanding PIM

This video explains the basic technical principles behind Passive Intermodulation (PIM), why PIM is an issue in wireless communications, and how to test PIM in the field.
Technical Documents:

Understanding PIM

A subtle, but widespread, cause of interference in radio frequency networks in general, and cellular networks in particular, is something called passive intermodulation, or PIM. This paper explains what PIM is, common sources of PIM, how PIM is identified and tested, and the different ways in which PIM sources can be located in the field.
Application Notes:

Interference hunting in TDD networks

In time division duplex (TDD) networks, the downlink (DL) and uplink (UL) use the same frequency band in different timeslots. When viewing such TDD signals on a conventional spectrum display, it is impossible to differentiate the two as well as any other unwanted signals present in the same spectrum. This makes interference hunting extremely difficult.… Read more »
Videos:

Prepare your Spectrum for 5G Deployment

The rollout of 5G NR will initiate a worldwide deployment in an unknown radio environment where unwanted transmitters can degrade end-user QoE and in some cases cause outages of critical services. Prior to deployment, operators need to ensure the radio environment is free from interference by conducting spectral clearance and interference hunting. This webinar defines… Read more »
Tutorial Series:

The Practice of Interference Hunting – The Basics

Radio interference affects our ability to communicate and is a big problem.  Learning how to identify interference, the sources and the solutions is getting a lot of attention in recent years. This webinar discusses radio interference and a basic understanding of why it is a problem, what to look for and adverse effects on radio… Read more »
Tutorial Series:

Wireless Interference: Measurements, Common Problems, & Solutions

Finding interference, making the measurement and interpreting the results, are key to successful RF interference hunting. Finding offending signals takes time, patience, and knowledge. It is important to use the right measurement tools to get fast and accurate results. And in many cases, identifying and resolving an interference problem, can have both a technical and… Read more »
Webinars:

Interference Hunting in 5G Networks

The tools and techniques used in interference hunting have remained largely the same across previous generations of cellular technologies. Differences in modulation, bandwidth, and frequency bands for 5G networks will however require substantial changes in how interference is detected, located, and resolved in 5G networks. This webinar will provide a short overview of pre-5G interference… Read more »
Whitepapers:

Evolving Challenges in LTE / Cable Interference Issues

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… Read more »