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Optimality of orthogonal sequences with multi-dimensional signaling

Padakandla, Arun and Sundaresan, Rajesh (2007) Optimality of orthogonal sequences with multi-dimensional signaling. In: Proceedings of the 2007 National Conference on Communication, Kanpur, Jan.2007, Kanpur.

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The sum capacity on a symbol-synchronous CDMA system having processing gain N and supporting K power constrained users is achieved by employing any set of N orthogonal sequences if a few users are allowed to signal along multiple dimensions. Analogously, the minimum received power (energy-per-chip) on the symbolsynchronous CDMA system supporting K users that demand specified data rates is attained by employing any set of N orthogonal sequences. At most (N - 1) users need to be split and if there are no oversized users, these split users need to signal only in two dimensions each. These results show that sum capacity or minimum sum power can be achieved with minimal downlink signaling.

Item Type: Conference Paper
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 14 Oct 2011 09:07
Last Modified: 14 Oct 2011 09:07
URI: http://eprints.iisc.ac.in/id/eprint/41448

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