Soft Decisions of D-PSK Demodulation for G3 OFDM Technology

Yan Yu Zhang

doi:10.4028/www.scientific.net/AMM.719-720.702

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 719-720Soft Decisions of D-PSK Demodulation for G3 OFDM...

Soft Decisions of D-PSK Demodulation for G3 OFDM Technology

Abstract:

G3-PLC, an orthogonal frequency division multiplexing (OFDM) power line communication solution, has recently gained a lot of attention. It supports the application of four types of baseband mapping modes in different environments. These modes typically require a hard-decision demodulation, which will lead to nearly 3dB preference loss. In this paper, we propose an improvement scheme for the baseband mapping modes by changing the constellation encoding method. The optimal soft decision algorithm which makes use of log likelihood ratio (LLR) of the probabilities is used in the demodulators. Simulation results show that the proposed scheme can outperformer previous algorithm.

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Periodical:

Applied Mechanics and Materials (Volumes 719-720)

Pages:

702-706

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.719-720.702

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Online since:

January 2015

Authors:

Yan Yu Zhang*

Keywords:

G3, OFDM, PLC, Soft Decision

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