A Study on Power and Bit Assignment of Embedded Multi-Carrier Modulation Schemes for Hierarchical Image Transmission over Digital Subscriber Line

Charlene GOUDEMAND
Francois-Xavier COUDOUX
Marc GAZALET

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B    No.7    pp.2071-2073
Publication Date: 2006/07/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.7.2071
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
hierarchical modulation,  digital subscriber line,  embedded multi-carrier modulation,  image transmission,  

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Summary: 
In this letter, we study the problem of designing an efficient power and bit allocation scheme in the context of a hierarchical image transmission system based on an embedded multi-carrier modulation (EMCM) scheme over digital subscriber line. Authors describe a novel algorithm that performs power minimization under bit rate constraint and QoS requirement. It is based on the Hughes-Hartogs algorithm, and successively allocates the bits of the high, then low priority data streams. Simulations that assess the performance of the proposed algorithm are also provided and discussed; they demonstrate the interest of the proposed scheme.