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Proceedings Paper

Structured low-density parity-check codes with bandwidth efficient modulation
Author(s): Michael K. Cheng; Dariush Divsalar; Stephanie Duy
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Paper Abstract

In this work, we study the performance of structured Low-Density Parity-Check (LDPC) Codes together with bandwidth efficient modulations. We consider protograph-based LDPC codes that facilitate high-speed hardware implementations and have minimum distances that grow linearly with block sizes. We cover various higherorder modulations such as 8-PSK, 16-APSK, and 16-QAM. During demodulation, a demapper transforms the received in-phase and quadrature samples into reliability information that feeds the binary LDPC decoder. We will compare various low-complexity demappers and provide simulation results for assorted coded-modulation combinations on the additive white Gaussian noise and independent Rayleigh fading channels.

Paper Details

Date Published: 1 May 2009
PDF: 11 pages
Proc. SPIE 7349, Wireless Sensing and Processing IV, 73490C (1 May 2009); doi: 10.1117/12.818223
Show Author Affiliations
Michael K. Cheng, Jet Propulsion Lab. (United States)
Dariush Divsalar, Jet Propulsion Lab. (United States)
Stephanie Duy, Jet Propulsion Lab. (United States)
Univ. of Maine (United States)

Published in SPIE Proceedings Vol. 7349:
Wireless Sensing and Processing IV
Sohail A. Dianat; Michael D. Zoltowski, Editor(s)

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