ITU-R REPORT M.2136 PDF

Introduction

Tests were run on a modern meteorological radar (noted as radar 1 in Annex 2 of Recommendation ITU-R M.1849) to determine the appropriate criteria necessary for protection from continuous wave (CW) and interference signals in the 2 700-2 900 MHz band. The tests were comprised of injecting a CW signal and six different digital modulation schemes into the radar receiver while it was scanning the atmosphere. Low-level or base meteorological products (base reflectivity, mean radial velocity and spectrum width) were recorded while conducting a series of antenna rotations at a single antenna elevation. Interference signals were injected with I/N ratios ranging from +6 dB to −15 dB.