NDLI: Spectrally efficient high data rate waveforms for the UFO SATCOM channel

Content Provider	IEEE Xplore Digital Library
Author	Battista, R.M. Jacobson, R.R. Middlestead, R.W.
Copyright Year	1998
Description	Author affiliation: Linkabit Wireless, San Diego, CA, USA (Battista, R.M.)
Abstract	This paper describes the application of spectrally efficient phase shaped 8PSK trellis coded modulation (8PSK-TCM) to the 5 and 25 kHz UHF follow-on (UFO) SATCOM channels. The satellite channel is characterized by a multi-pole linear filter followed by a hardlimiter, zonal filter and traveling wave tube (TWT) amplifier. For the additive white Gaussian noise (AWGN) channel the trellis coding provides about 2.9 dB of coding gain at P/sub be/=10/sup -5/ without bandwidth expansion, however, a high-rate Reed Solomon outer code is used to obtain an additional 1.1 dB resulting in a bandwidth expansion of less than 7%. The performance is examined for symbol rates as high as the channel bandwidth (B/sub c/T/spl ges/1). For operation at lower symbol rates, B/sub c/T>1, the outer code rate is adjusted downwards to fully utilize the channel bandwidth while achieving additional coding gain for disadvantaged terminals, i.e., those with lower C/N/sub 0/ capability. Demodulator equalization is required to minimize intersymbol interference (ISI). Spectral control is achieved by shaping the symbol phase transitions, and the resulting constant envelope waveform exhibits very little spectral re-growth following the satellite bandlimiting and non-linearity. The use of periodically inserted pilot bits to maintain coherent detection with dedicated channel applications also serve as stuff bits for matching the symbol rate to the user data rate and the internal clock. The pilot bits result in a bandwidth expansion of typically 3-5%. The paper describes the performance results based on detailed Monte-Carlo simulations of both the spectral characteristics and the bit-error performance and compares the results with laboratory measurement data.
Starting Page	134
Ending Page	139
File Size	572198
Page Count	6
File Format	PDF
ISBN	0780345061
DOI	10.1109/MILCOM.1998.722559
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-10-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bandwidth AWGN Satellites Nonlinear filters Intersymbol interference Phase modulation Modulation coding Additive white noise Gain Reed-Solomon codes
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