Accession Number : ADA574839


Title :   High Dynamic Range Nonlinear Measurement using Analog Cancellation


Descriptive Note : Final rept. Jun-Jul 2012


Corporate Author : ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE


Personal Author(s) : Wetherington, Joshua M ; Mazzaro, Gregory J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a574839.pdf


Report Date : Oct 2012


Pagination or Media Count : 26


Abstract : An active analog canceller system is implemented to maximize the dynamic range of a two-tone nonlinear measurement, a common test for nonlinear radio frequency behavior. The canceller uses active feedforward cancellation, controlled by a fully automated iterative algorithm. The system enables testing of a variety of nonlinear channels and devices, either by direct connection or wireless probing. In this report, the advantages of feedforward cancellation are summarized, a two-tone architecture using this cancellation is presented, the software algorithm for automating measurements using this architecture is explained, and the performance of the cancellation system recently constructed at the U.S. Army Research Laboratory (ARL) is evaluated using measured data.


Descriptors :   *ANALOG SYSTEMS , *CANCELLATION , *HIGH DYNAMIC RANGE , AUTOMATION , BANDWIDTH , DISTORTION , INTERMODULATION , ITERATIONS , MEASUREMENT , NONLINEAR SYSTEMS , RECEIVERS


Subject Categories : Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE