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Convolutional Multiplexing for Multicarrier Transmission: System Performance and Code Design

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Abstract

The paper presents a new multiplexing scheme, called convolutional multiplexing (CM), to achieve high diversity gain and high spectrum efficiency for OFDM-based systems. In this scheme, data symbols are spread onto several subcarriers by the convolutional spreader. Spectrum efficiency can be improved by two approaches: high order modulation and multi-code multiplexing. With the best spreading codes searched out, the multi-code multiplexing OFDM-CM system performs better in AWGN channel, but may lose diversity gain in frequency selective fading channels. On the other hand, the single-code spreading OFDM-CM system with high order modulation can achieve the maximum diversity order. Simulation results show that the multi-code convolutional multiplexing perform better than code-division multiplexing (CDM) for OFDM-based systems.

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Authors and Affiliations

  1. School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Wei Jiang & Daoben Li

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  1. Wei Jiang
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  2. Daoben Li
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Correspondence to Wei Jiang.

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Jiang, W., Li, D. Convolutional Multiplexing for Multicarrier Transmission: System Performance and Code Design. Wireless Pers Commun 49, 545–560 (2009). https://doi.org/10.1007/s11277-008-9576-0

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  • DOI: https://doi.org/10.1007/s11277-008-9576-0

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