Performance analysis of a LINK-16/JTIDS compatible waveform transmitted over a channel with pulse-noise interference
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Authors
Lekkakos, Dimitrios
Robertson, R. Clark
Subjects
Advisors
Date of Issue
2009
Date
Publisher
IEEE
Language
Abstract
The Joint Tactical Information Distribution System (JTIDS) is a hybrid frequency-hopped, direct sequence spread spectrum system that utilizes a (31, 15) Reed-Solomon (RS) code and cyclical
code-shift keying (CCSK) modulation for the data packets, where each encoded symbol consists of
five bits. In this paper, an alternative waveform compatible with the existing JTIDS direct sequence spread spectrum channel waveform is analyzed. The system considered uses the same (31, 15)
RS encoding as the original JTIDS but uses 32-ary orthogonal signaling with 32 chip baseband
waveforms such as Walsh functions instead of CCSK. Currently, the JTIDS waveform is received
noncoherently at the chip level, but in this paper the performance of the alternative, JTIDS-compatible waveform is evaluated for coherent as well as for noncoherent demodulation in order to ascertain the performance possible if coherent demodulation were practical. For coherent demodulation, each pair of five-bit symbols at the output of the RS encoder is assumed to undergo serial-to-parallel conversion to two five-bit symbols, which are then independently transmitted on the in-phase and quadrature component of the carrier, with the result that the data rate for coherent demodulation is twice that for noncoherent demodulation. The performance of the alternative waveform for the relatively benign case where additive white Gaussian noise is the only noise present as well as when pulse-noise interference is present is investigated for both coherent and noncoherent demodulation.
Type
Conference Paper
Description
The article of record as published may be found at http://dx.doi.org/10.1109/PACRIM.2009.5291403
Series/Report No
Department
Electrical and Computer Engineering
Organization
Naval Postgraduate School (U.S.)
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NPS Report Number
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Format
6 p.
Citation
D. Lekkakos, R.C. Robertson, "Performance analysis of a LINK-16/JTIDS compatible waveform transmitted over a channel with pulse-noise interference," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, PacRim 2009, 23-26 October 2009, 6 p.
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Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.