NDLI: EVM Simulation and Analysis Techniques

Content Provider	IEEE Xplore Digital Library
Author	Wang, A.K. Ligmanowski, R. Castro, J. Mazzara, A.
Copyright Year	2006
Description	Author affiliation: Lockheed Martin Corp., Sunnyvale, CA (Wang, A.K.; Ligmanowski, R.)
Abstract	EVM (error vector magnitude) is used as the metric for transmitter signal quality compliance in many modern communication systems. Examples include IS-54/IS-136, GSM/EDGE, 3GPP-WCDMA, and 802.11a/b/g wireless LAN commercial standards. MUOS (Mobile User Objective System) is an example of a next generation military communications system leveraging the commercial use of this metric. Both engineering analysis and simulation were used to develop the EVM specification for MUOS. The approach is described in this paper. All major aspects of a transmitter physical layer system were studied, including the impact of distortions due to modulator imbalances, phase noise, nonlinear amplifiers, spurs, and non-ideal filtering. For illustrative purposes, specific data values for individual distortions are taken from the TDRSS and WGSS transmitter systems, published in open literature to represent performance typical of a transponding satellite using an 8PSK waveform. Matlab simulation results are compared to analytical predictions for a generic transmitter system, validating the technical approach used in MUOS. The resulting transmitter signal distortion is translated from EVM to Ec/No degradation for determination of end-to-end link performance. Practical issues on EVM laboratory measurements and the diagnostic value of EVM are also addressed
Starting Page	1
Ending Page	7
File Size	7084953
Page Count	7
File Format	PDF
ISBN	142440617X
DOI	10.1109/MILCOM.2006.302043
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Analytical models Transmitters Nonlinear distortion GSM Wireless LAN Military communication Physical layer Phase distortion Phase modulation Phase noise
Content Type	Text
Resource Type	Article

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