Aggregate LTE Emissions

Aggregate LTE:  Characterizing User Equipment Emissions

The National Advanced Spectrum and Communications Testing Network (NASCTN) has updated the Aggregate LTE draft test plan for measuring the impact of user equipment (UE) aggregate long term evolution (LTE) emissions on federal systems in the AWS-3 Band according to comments  submitted by the spectrum community.

NASCTN previously held a public briefing to explain the details of the test plan and clarify questions on September 13, 2017. 

This NASCTN project was initiated as a result of the 2014 AWS-3 spectrum auction, which assigned 1755-1780 MHz frequencies to commercial wireless carriers with conditions for sharing the spectrum with existing federal systems.  As carriers consider early network buildouts in this band, the Defense Information Systems Agency (DISA) Defense Spectrum Organization (DSO) is engaged in a broader effort to assess interference risk between the two types of systems, with aggregate LTE user equipment emissions as one potentially influential factor.

The draft test plan describes the methodology for measuring aggregate interference based on several factors, including the collective power distributions emitted by the UEs in a cell, the number of UEs transmitting simultaneously, the spectral properties of the UEs, channel characteristics on the path between the UEs and unintended receivers, and other special conditions relevant to the test environment. Phase 1 of the test plan will be set in a controlled lab environment to produce baseline reference variables for network configuration and accurate assessment of impact dependencies. 

Results of the NASCTN project may affect the business strategy and network design of commercial deployments during the time federal systems continue to operate in the 1755-1780 MHz band.

For additional reference, the documents may also be found at the following links: 

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Created September 05, 2017, Updated May 10, 2019