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Two new families of low-correlation interleaved QAM sequence

Garg, Gagan and Kumar, Vijay P and Madhavan, Veni CE (2008) Two new families of low-correlation interleaved QAM sequence. In: International Conference on Sequences and Their Applications SETA, University of Kentucky, Lexington, KY,.

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Official URL: http://www.springerlink.com/content/50g2u87p787m18...

Abstract

Two families of low correlation QAM sequences are presented here. In a CDMA setting, these sequences have the ability to transport a large amount of data as well as enable variable-rate signaling on the reverse link. The first family Á2SQ - B2− is constructed by interleaving 2 selected QAM sequences. This family is defined over M 2-QAM, where M = 2 m , m ≥ 2. Over 16-QAM, the normalized maximum correlation [`(q)]maxmax is bounded above by <~1.17 ÖNUnknown control sequence '\lesssim' , where N is the period of the sequences in the family. This upper bound on [`(q)]maxmax is the lowest among all known sequence families over 16-QAM.The second family Á4SQ4 is constructed by interleaving 4 selected QAM sequences. This family is defined over M 2-QAM, where M = 2 m , m ≥ 3, i.e., 64-QAM and beyond. The [`(q)]maxmax for sequences in this family over 64-QAM is upper bounded by <~1.60 ÖNUnknown control sequence '\lesssim' . For large M, [`(q)]max <~1.64 ÖNUnknown control sequence '\lesssim' . These upper bounds on [`(q)]maxmax are the lowest among all known sequence families over M 2-QAM, M = 2 m , m ≥ 3.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Springer.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 19 Sep 2011 08:55
Last Modified: 19 Sep 2011 08:55
URI: http://eprints.iisc.ernet.in/id/eprint/40582

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