Show simple item record

dc.contributor.advisorRobertson, Ralph C.
dc.contributor.authorLekkakos, Dimitrios.
dc.date.accessioned2012-03-14T17:39:41Z
dc.date.available2012-03-14T17:39:41Z
dc.date.issued2008-09
dc.identifier.urihttp://hdl.handle.net/10945/3889
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.abstractThe 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 thesis, an alternative waveform consistent with the existing JTIDS channel waveform is analyzed. The system to be considered uses (31, 15) RS encoding as the original JTIDS, but each pair of five-bit symbols at the output of the RS encoder undergo serial-to-parallel conversion to two five-bit symbols, which are then independently transmitted on the in-phase (I) and quadrature (Q) component of the carrier using 32-ary orthogonal signaling with 32 chip baseband waveforms such as Walsh functions. This system is consistent with the direct sequence waveform generated by JTIDS. The performance obtained with alternative waveform is compared with that obtained with the existing JTIDS waveform for the relatively benign case where additive white Gaussian noise (AWGN) is the only noise present as well as when pulse-noise interference (PNI) is present. Errors-and-erasures decoding (EED) as well as errors only decoding is also considered. Based on the analyses, we conclude that the proposed alternative Link-16/JTIDS compatible waveform performs better than the existing Link-16/JTIDS waveform in AWGN as well as when PNI is present for both coherent and noncoherent demodulation. No significant advantage is obtained by using errors-and-erasures decoding (EED) for the alternative Link-16/JTIDS compatible waveform.en_US
dc.description.urihttp://archive.org/details/performancenalys109453889
dc.format.extentxviii, 90 p. : ill. ;en_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined
in Title 17, United States Code, Section 101. As such, it is in the
public domain, and under the provisions of Title 17, United States
Code, Section 105, is not copyrighted in the U.S.en_US
dc.subject.lcshSpread spectrum communicationsen_US
dc.subject.lcshReed-Solomon codesen_US
dc.subject.lcshRandom noise theoryen_US
dc.subject.lcshTime division multiple accessen_US
dc.titlePerformance analysis of a Link-16/JTIDS compatible waveform transmitted over a channel with pulse-noise interferenceen_US
dc.typeThesisen_US
dc.contributor.secondreaderHa, Tri
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.description.recognitionOutstanding Thesisen_US
dc.description.serviceHellenic Navy author.en_US
dc.identifier.oclc271445153
etd.thesisdegree.nameM.S.en_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineElectronic Warfare System Engineering and M.S. in Electrical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.verifiednoen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record