A novel cross coding scheme for OFDM systems


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Shao, Xiaoying and Slump, Cornelis H. (2009) A novel cross coding scheme for OFDM systems. In: IEEE Information Theory Workshop, ITW 2009, October 11-16, 2009, Taormina, Italy.

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Abstract:In wireless OFDM-based systems, coding jointly over all the sub-carriers simultaneously performs better than coding separately per sub-carrier. However, the joint coding is not always optimal. In this paper, we propose a novel coding scheme based on fountain codes, which combines the separate coding and the joint coding over all the sub-carriers. The key element in the new proposed system is that each fountain-encoded packet is transmitted over a single sub-carrier. The packets can be discarded if they have encountered a low-energy channel. Fountain codes can recover the source data by using only the surviving packets. With this new approach, we have a gain of around 8.5 dB comparing to the FEC layer used in current WLAN standards (i.e. the IEEE 802.11a standard and the IEEE 802.11n standard).
Item Type:Conference or Workshop Item
Copyright:© 2009 IEEE
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/69845
Official URL:http://dx.doi.org/10.1109/ITW.2009.5351209
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