NDLI: Polyphase Sliding Goertzel Demodulator for Continuous Phase Frequency Modulated Signals

Content Provider	IEEE Xplore Digital Library
Author	Shevchenko, P.S. Kirichenko, D.E. Miller, R. Gupta, D.
Copyright Year	2002
Abstract	We describe the design of a new demodulator for continuous phase frequency modulated signals such as link-16 messages. A link-16 message consists of short RF pulses containing 32 ldquochipsrdquo each one having duration of 200 ns. One of the main difficulties in demodulation of such signals is the very short ldquochiprdquo period as compared to the frequency difference between the carrier and its' modulation. For example in link-16, the difference in frequency between the carrier and its' modulated signal is only 1.25 MHz. This makes traditional demodulation approaches, i.e., mixing the incoming signal with the carrier frequency and then low-pass filtering ineffective. We present a new method of demodulating such signals by digitizing the incoming signal in a superconducting delta-sigma modulator driving a 1 to 64 deserializer, then digitally filtering with a polyphase implementation of a sliding Goertzel filter. We have designed and fabricated a bandpass analog-to-digital converter (ADC) chip with an on chip deserializer, an additional room-temperature deserializer, and an FPGA polyphase implementation of sliding Goertzel filter. The results are presented for our experimental evaluation of link-16 message demodulation.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	570
Ending Page	573
Page Count	4
File Size	690430
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Demodulation Continuous phase modulation Frequency modulation Superconducting filters Band pass filters Low pass filters Filtering Digital filters Signal design Radio frequency superconducting devices Analog-digital conversion continuous phase modulation link-16
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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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
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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