Abstract
Driven by the Infrared Data Association (IrDA) wireless infrared communication has become a very popular and widely used method for short range data transmission between mobile devices like laptops, PDAs and mobile phones. Quality and speed of infrared communications are mainly limited by the bandwidth of the infrared transceivers. Therefore it is important to use a modulation technique with a high bandwidth efficiency, while simultaneously maintaining a low bit error rate and high power efficiency. Consequently, IrDA has continuously improved the modulation techniques of its standards (IrDA, 2001) by introducing Return to Zero inverted (RZI), 4 Pulse Position Modulation (4-PPM) and HHH(1, 13), whereby the latest is basically a 2/3-rate Run-Length-Limited (RLL) code (Hirt, Hassner, Heise, 2001). Recently the authors have published a novel modulation scheme called Edge Position Modulation (EPM) with Run-Length-Limited (RLL) coding (Luftner et al., 2003). This article will continue this work by presenting a completely new RLL(5, 12) code that is optimized for EPM.
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