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Performance comparison of spread-spectrum methods in an HF interference environment
KTH, Superseded Departments, Signals, Sensors and Systems. (Radio Communication Systems)
1995 (English)Conference paper (Refereed)
Abstract [en]

Since the interfering signals from other users of the spectrum is a main problem in HF  communication, it is necessary to consider them when evaluating HF radio systems.  Based on the Laycock­Gott congestion model, a statistical HF interference model is  derived and briefly compared to real measurements. The two basic methods to apply  spread­spectrum modulation in radio communication are frequency­hopping (FH) and  direct­sequence (DS) modulation. In this work we compare these two methods, with  respect to the uncoded bit error probability, on an interference­limited HF channel. The  results show that the FH system performs better than the DS system on this channel.  The FH system is inherently well suited for the HF environment with predominantly  narrowband interferers. The interference rejection capabilities of the DS system are  not sufficient to handle the high dynamic range of the interfering power. Additional  narrowband rejection capabilities would be required to create useful DS systems.

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Computer and Information Science
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URN: urn:nbn:se:kth:diva-28579OAI: diva2:388016
Nordic HF Conference
QC 20110117Available from: 2011-01-16 Created: 2011-01-16 Last updated: 2011-01-17Bibliographically approved

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ReferencesLink to record
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