NDLI: Spectrum characteristic analysis of DDS-based RF digital modulation

Content Provider	IEEE Xplore Digital Library
Author	Jigang Liu Jian Liu
Copyright Year	2001
Description	Author affiliation: Philips Res. East Asia, Xi'an, China (Jigang Liu)
Abstract	A conventional radio frequency (RF) modulator with phase locked loop (PLL) has disadvantages in modulated specification and complicated systems. With the fast development of direct digital synthesis (DDS), DDS can be incorporated into the RF modulator, which results in flexible changing parameters and adding digital filters. However, the DDS modulator also causes some problems such as low output frequency and worse spurs. This paper discusses the results of RF digital modulation combining DDS with PLL and analyzes its modulator character and output spectrum character for ideal conditions. As a result, the RF output character in the loop band width is decided by DDS, and out of the loop band width is decided by a voltage controlled oscillator (VCO). The spurs of the DDS output can be filtered out and thus a good modulated signal spectrum can be achieved. Experimental results are presented. By combination of DDS with PLL, an RF digital modulator with good performance and low cost can be obtained.
Sponsorship	IEEE Region 10
Starting Page	588
Ending Page	591
File Size	433310
Page Count	4
File Format	PDF
ISBN	0780371011
DOI	10.1109/TENCON.2001.949662
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-08-19
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency Digital modulation Phase locked loops Signal synthesis Phase modulation Millimeter wave technology Bandwidth Voltage-controlled oscillators Frequency synthesizers Signal generators
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