NDLI: High Efficiency VHF Transmitters Based on Polar Modulator and Enhanced PWM Power Converter

Content Provider	IEEE Xplore Digital Library
Author	Alimenti, A. Gesano, A. Nocito, P. Pezzetta, D.
Copyright Year	2007
Description	Author affiliation: SELEX Commun. S.p.A., Pomezia (Alimenti, A.; Gesano, A.)
Abstract	This paper focuses on the design solutions needed to improve the global power efficiency of a VHF transmitter. The proposed approach is based on a polar modulation architecture and uses an enhanced PWM power converter (patent pending, PCT/IB2006/051827) to realize the envelope modulation. A custom algorithm is adopted to dynamically control the output envelope of the RF signal. In order to operate in real-time, the algorithm has been implemented in a FPGA. The AM to PM distortion of the polar transmitter has been carefully investigated and corrected exploiting either a feed-forward or a feed-back technique. As a result, a transmitter efficiency (final stage and amplitude modulator) of 62% was measured at 119 MHz for a 16 W average output power. In this experiment the VDL2 modulation standard was used (D8PSK modulation with lO.Sksps) obtaining an EVM of 0.30% and an ACPR less than -63 dBc. A final discussion on the possibility to export the proposed solutions to other RF communication systems and platforms is given.
Starting Page	36
Ending Page	39
File Size	340428
Page Count	4
File Format	PDF
ISBN	9782874870033
DOI	10.1109/ECWT.2007.4403939
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-08
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	European Microwave Association
Subject Keyword	Radio frequency Pulse width modulation converters Power measurement Transmitters Pulse width modulation Amplitude modulation Distortion measurement Feedforward systems Field programmable gate arrays Power generation
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

All digital FPGA based PWM modulator for radio frequency transmitters

Simplified analysis of the three-phase PWM switching converter

FPGA Based Multiplex PWM Generator for Multilevel Converters Applied Wind Power Generator

Sinewave generation using bit-streams

Direct PWM Synchronization Using An All Digital Phase-Locked Loop for High Power Grid-Interfacing Converters

Digital compensation of a high-frequency voltage - mode DC-DC converter

FPGA-based digital current mode controller for phase-shifted full-bridge PWM converter

Distortion mechanisms in supply modulation of polar transmitters

Limited-Pool Random Carrier-Frequency PWM for Digitally Controlled dc-dc Converters

High Efficiency VHF Transmitters Based on Polar Modulator and Enhanced PWM Power Converter

Similar Documents

All digital FPGA based PWM modulator for radio frequency transmitters

Simplified analysis of the three-phase PWM switching converter

FPGA Based Multiplex PWM Generator for Multilevel Converters Applied Wind Power Generator

Sinewave generation using bit-streams

Direct PWM Synchronization Using An All Digital Phase-Locked Loop for High Power Grid-Interfacing Converters

Digital compensation of a high-frequency voltage - mode DC-DC converter

FPGA-based digital current mode controller for phase-shifted full-bridge PWM converter

Distortion mechanisms in supply modulation of polar transmitters

Limited-Pool Random Carrier-Frequency PWM for Digitally Controlled dc-dc Converters

High Efficiency VHF Transmitters Based on Polar Modulator and Enhanced PWM Power Converter