This project covers development of a Recommended Practice for the design and coordinated deployment of fixed broadband wireless access (BWA)systems operating from 10-66 GHz (with a focus on 23.5-43.5 GHz)in order to minimize interference so as to maximize system performance and/or service quality. This practice will provide for coexistence using frequency and spatial separation and will cover three areas. First,it will recommend limits of in-band and out-of-band emissions from BWA transmitters through parameters including radiated power,spectral masks and antenna patterns. Second,it will recommend receiver tolerance parameters, including noise floor degradation performance, for interference received from other BWA systems. Third,it will provide coordination parameters,including separation distances,and power flux density limits,to enable successful deployment of BWA systems with tolerable interference. The scope includes interference between systems deployed across geographic boundaries in the same frequency band and systems deployed in the same geographic area in different frequency bands (including different systems deployed by a single license-holder in sub-bands of the licensees authorized bandwidth). The scope does not cover coexistence issues due to intrasystem frequency re-use within the operator 's licensed band,and it does not consider the impact of interference created by BWA systems on non-BWA terrestrial and satellite systems.