Radio Frequency Interference Rfi Investigation And Resolution Guide

This handy pocket reference offers essential data on radio frequency interference (RFI) for advanced ham radio operators, wireless engineers who troubleshoot interference problems, and technicians.

This authoritative resource describes how to assess and mitigate RF interference in radio systems and presents effective methods to identify and resolve RFI before, during and after its appearance. Authored by a leading authority in the field, this book provides engineers and managers with the knowledge they need in the control of Radio Frequency Interference. Readers find practical guidance in an array of critical areas, including engineering of radiocommunication and wireless systems in light of RFI, identifying RFI modes, electromagnetic compatibility and spectrum sharing. Key concepts in evaluating radio frequency interference, propagation on obstructed paths, interference protection radio and RFI resolution and mitigation techniques such as filtering, spectral capture, radiolocation, cancellation and cognitive radio are covered in this book. This book concludes with prospective for RFI resolution in future radiocommunication systems.

Backup Emergency Communications (BUEC) equipment operation in the field has been reported impaired by radio-frequency interference (RFI). This RFI was investigated at the Elwood, New Jersey, ARSR-2 radar site in April 1973. The investigation consisted of determining the interference frequencies from various sources which broke the squelch threshold of BUEC Very High Frequency (VHF) and Ultra High Frequency (UHF) transceivers with respect to the RFI sources. The investigation showed that two major sources of RFI were the Common Digitizer (CD) (With its doors open) and the radar. It was also found that the number of interference frequencies which break the squelch threshold diminish with increasing distance from the RFI source; that RFI from the CD shifts in distance and azimuth versus time; and that the RFI from the radar appears to come from the radar modulator, amplitron, and magnetron rather than from the radar antenna. (Author).

In Four Volumes. Volume 1, Fundamentals Of Electromagnetic Interference; Volume 2, Electromagnetic Interference Prediction And Measurement; Volume 3, Methods Of Electromagnetic Interference-Free Design And Interference Suppression; Volume 4, Utilization Of The Electromagnetic Spectrum.

Active remote sensing is the principal tool used to study and to predict short- and long-term changes in the environment of Earth - the atmosphere, the oceans and the land surfaces - as well as the near space environment of Earth. All of these measurements are essential to understanding terrestrial weather, climate change, space weather hazards, and threats from asteroids. Active remote sensing measurements are of inestimable benefit to society, as we pursue the development of a technological civilization that is economically viable, and seek to maintain the quality of our life. A Strategy for Active Remote Sensing Amid Increased Demand for Spectrum describes the threats, both current and future, to the effective use of the electromagnetic spectrum required for active remote sensing. This report offers specific recommendations for protecting and making effective use of the spectrum required for active remote sensing.