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dc.contributor.authorMasenten, W. K.
dc.date.accessioned2016-06-17T20:35:32Z
dc.date.available2016-06-17T20:35:32Z
dc.date.issued1981-10
dc.identifier.issn0884-5123
dc.identifier.issn0074-9079
dc.identifier.urihttp://hdl.handle.net/10150/613602
dc.descriptionInternational Telemetering Conference Proceedings / October 13-15, 1981 / Bahia Hotel, San Diego, Californiaen_US
dc.description.abstractUse of spread spectrum techniques for communication systems has proven an effective technique for increasing the ECCM capability. This technique has, however, increased the systems susceptibility to narrow band interference because of the larger bandwidth occupied by spread spectrum waveform. This vulnerability is further compounded by the interferers often being in close proximity to the receiver and the dynamic nature of the interference environment. The adaptive filter is a technique for suppressing interferers whose spectral characteristics are different from those of the signal of interest while passing the data with a minimum of phase and amplitude distortion. The adaptive filter can be realized as a steerable notch filter or a fully adaptive transversal filter following the development by Widrow. Use of the adaptive filter as a pre-filter or whitening filter prior to the demodulator is discussed. The advantage of suppressing high level narrowband interference prior to the demodulator, especially when the demodulators are implemented digitally is the main motivation. An important consideration is the ability of spread spectrum systems to tolerate a substantial loss of spectral energy while still maintaining the desired performance. This feature allows use of steerable filters with relatively wide notches or correspondingly transversal filters without a large number of coefficients. Finally, implementation of adaptive transversal filters with surface acoustic wave (SAW) and charge coupled devices (CCD) is discussed.
dc.description.sponsorshipInternational Foundation for Telemeteringen
dc.language.isoen_USen
dc.publisherInternational Foundation for Telemeteringen
dc.relation.urlhttp://www.telemetry.org/en
dc.rightsCopyright © International Foundation for Telemeteringen
dc.titleADAPTIVE INTERFERENCE REJECTION FILTERS FOR SPREAD SPECTRUM COMMUNICATION SYSTEMSen_US
dc.typetexten
dc.typeProceedingsen
dc.contributor.departmentHughes Aircraft Companyen
dc.identifier.journalInternational Telemetering Conference Proceedingsen
dc.description.collectioninformationProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.en
refterms.dateFOA2018-09-11T13:28:08Z
html.description.abstractUse of spread spectrum techniques for communication systems has proven an effective technique for increasing the ECCM capability. This technique has, however, increased the systems susceptibility to narrow band interference because of the larger bandwidth occupied by spread spectrum waveform. This vulnerability is further compounded by the interferers often being in close proximity to the receiver and the dynamic nature of the interference environment. The adaptive filter is a technique for suppressing interferers whose spectral characteristics are different from those of the signal of interest while passing the data with a minimum of phase and amplitude distortion. The adaptive filter can be realized as a steerable notch filter or a fully adaptive transversal filter following the development by Widrow. Use of the adaptive filter as a pre-filter or whitening filter prior to the demodulator is discussed. The advantage of suppressing high level narrowband interference prior to the demodulator, especially when the demodulators are implemented digitally is the main motivation. An important consideration is the ability of spread spectrum systems to tolerate a substantial loss of spectral energy while still maintaining the desired performance. This feature allows use of steerable filters with relatively wide notches or correspondingly transversal filters without a large number of coefficients. Finally, implementation of adaptive transversal filters with surface acoustic wave (SAW) and charge coupled devices (CCD) is discussed.


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