Measured noise performance of a direct-sequence spread-spectrum system and a comparison of single-vice dual-channel delay-lock loops

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dc.contributor.advisorMyers, Glen
dc.contributor.authorBartone, Chris G.
dc.contributor.corporateNaval Postgraduate School
dc.contributor.departmentElectrical Engineering
dc.contributor.schoolNaval Postgraduate School
dc.contributor.secondreaderBukofzer, Daniel
dc.date.accessioned2012-11-27T00:23:13Z
dc.date.available2012-11-27T00:23:13Z
dc.date.issued1987-09
dc.description.abstractA direct-sequence (DS) spread spectrum system which could be used by a conventional amplitude modulated (AM) radio system was designed, built and tested. A delay-lock loop was used to provide code synchronization in the receiver. The noise performance of a single-channel delay-lock loop (SCDLL) was compared with a dual-channel delay-lock loop (DCDLL) with no data being transmitted. When data was transmitted a DCDLL was used and the noise performance (probability of bit error) of the DS spread spectrum system was measured. Test results indicate that the SCDLL performs as well as or better than the DCDLL. The measured noise performance of the DS spread spectrum system was within 5 dB of theoretical values for a spreading factor of 255. Conclusions are that apart from hardware simplicity, the SCDLL provides, in practice, a noise performance advantage relative to the DCDLL and that this DS spread spectrum system can be used to transmit low rate digital data reliably at values of SNR much less than unity. It is recommended that this DS spread spectrum system be considered by the Department of Defense to be implemented in AM radio systems to provide low data rate anti-jam/interference rejection capability.en_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.
dc.description.serviceElectronics Engineer, Naval Air Test Centeren_US
dc.description.urihttp://archive.org/details/measurednoiseper1094522347
dc.format.extent103 p.en_US
dc.identifier.urihttps://hdl.handle.net/10945/22347
dc.language.isoen_US
dc.subject.authorDirect-Sequence Spread-Spectrumen_US
dc.subject.authorBPSKen_US
dc.subject.authorLPIen_US
dc.subject.authorCommunicationsen_US
dc.subject.authorDelay- Lock Loopen_US
dc.subject.authorProcessing Gain Spread Spectrumen_US
dc.subject.authorAJen_US
dc.subject.authorAMen_US
dc.subject.authorAM-DSB-SCen_US
dc.subject.lcshElectrical and computer engineeringen_US
dc.titleMeasured noise performance of a direct-sequence spread-spectrum system and a comparison of single-vice dual-channel delay-lock loopsen_US
dc.typeThesisen_US
dspace.entity.typePublication
etd.thesisdegree.disciplineElectrical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.nameM.S. in Electrical Engineeringen_US
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