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Improvement of DS System using Transversal Filter for Advanced Duty Rate on Meteor Burst Channel  

Kwon Hyeog-Soong (부산대학교 바이오시스템공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.6A, 2006 , pp. 627-633 More about this Journal
Abstract
In spite of many advantages of Meteor Burst Communications(MBC) on its transmission channel, the fact that its duty rate is less than 10 percents is a considerable deficiency of MBC. To overcome with this deficiency without paying large cost, we use a direct sequence(DS) simple reception system. This method doesn't need to add the components for acquisition or tracking the signal so that it keeps the cost efficiency of the MBC. But it has a disadvantage that its duty rate shows a large decline by noise. For this problem we adopt the proposed system applying a transversal filter circuit. The improvement by this method is more significant when the received signal is weak Simulation results show as t1 is 100ms, then the burst length would be increased by 35% when the initial value of the received signal power increases by 3 dB, t2 is 135ms. If the power increases by 6dB the burst length would be 170ms thus increased by 70%, which shows a great enhancement. Suppose now that t1 is 50ms and the power is increased by 3dB, then t2 would be increased by 70% to 85ms, and increasing the power by 6dB it would be increased by 130% to 115ms.
Keywords
Meteor Burst Communication(MBC); Direct Sequence Spread Spectrum Communication(DS/SS);
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