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Improved Interference Diversity in Multicellular OFDMA Systems |
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Written by Sarad
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Jan 19, 2009 at 11:39 AM |
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Abstract— Orthogonal frequency division multiple access
(OFDMA) is becoming a popular technology choice for leading
next generation wireless networks. The IEEE 802.16e based
systems are the first standardized wireless networks which have
incorporated OFDMA. We investigate the use of interference
diversity in IEEE 802.16e based networks by considering
subchannel formation in different cells. We propose a method for
quantifying the interference diversity using suitable arguments
and results. Based on these results, a new method for forming
subchannels in an 802.16e system is presented.
Click Here: E-print PDF, Presentation, IEEEXplore
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String Art: Circle Drawing Using Straight Lines |
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Written by Sarad
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Nov 26, 2008 at 07:51 AM |
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An algorithm to generate the locus of a circle using the intersection points of straight lines is proposed. The pixels on the circle are plotted independent of one another and the operations involved in finding the locus of the circle from the intersection of straight lines are parallelizable. Integer only arithmetic and algorithmic optimizations are used for speedup. The proposed algorithm makes use of an envelope to form a parabolic arc which is consequent transformed into a circle. The use of parabolic arcs for the transformation results in higher pixel errors as the radius of the circle to be drawn increases. At its current state, the algorithm presented may be suitable only for generating circles for string art.
Click Here:
Abstract,Pdf. |
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