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Efficient layered data transport over multicarrier systems using optimized embedded modulation

delete2002-06-01
delete11
PRE
AI
S
S. Sandeep Pradhan *
K
Kannan Ramchandran
DOI：10.1109/TCOMM.2002.1010604delete
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Abstract

Abstract

En 中文
We tackle the problem of efficient layered or multiresolution (MR) data transmission over multicarrier modulation (MCM) systems. In this paper we treat the source as being characterized by multiple layers of importance, i.e., having different bit error rate (BER) requirements. First we consider the MCM systems in a multiresolution framework using multiplexing techniques. Then we present the idea of embedded multicarrier modulation (E-MCM) as an effective way of achieving this, and introduce a fast table-lookup-based power allocation algorithm that optimizes the multicarrier constellation design in terms of maximizing the deliverable throughput bit-rate, subject to a total power constraint. Simulation results of our E-MCM system reveal substantial gains (up to about 25%) in deliverable bit-rates over optimized time-division-multiplexed-based designs.
Keywords:
frequency-division multiplexing
multicarrier modulation
multiresolution constellation
time-division multiplexing
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Journal

IEEE Transactions on Communications cover
IEEE Transactions on Communications
IF:
8.3
Papers:
1.2W
Citations:
3.6W

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