Opportunistic Error Correction for MIMO

Shao, Xiaoying and Slump, Cornelis H. (2009) Opportunistic Error Correction for MIMO. In: IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC '09 , 13-16 Sept. 2009, Tokyo, Japan.

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Abstract:	In this paper, we propose an energy-efficient scheme to reduce the power consumption of ADCs in MIMO-OFDM systems. The proposed opportunistic error correction scheme is based on resolution adaptive ADCs and fountain codes. The key idea is to transmit a fountain-encoded packet over one single sub-carrier per antenna and to transmit more packets than needed for decoding. Comparing to the IEEE 802.11n standard, this approach allows around 83 $\%$ of power saving in ADCs for a $2\times2$ system and 90 $\%$ for a $4\times4$ system. With the current FEC scheme defined in the IEEE 802.11n standard, a $4\times4$ system requires twice amount of power in ADCs as a $2\times2$ system when receiving the same amount of information with the same power. However, using opportunistic error correction in a $4\times4$ system costs only around 1.4 times amount of energy in ADCs comparing to a $2\times2$ system.
Item Type:	Conference or Workshop Item
Copyright:	© 2009 IEEE
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Signals and Systems (SAS)
Link to this item:	http://purl.utwente.nl/publications/71165
Official URL:	http://dx.doi.org/10.1109/PIMRC.2009.5449870
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