A novel low-latency BICM system by quantizing the constellation on the demodulation end

DOI

10.2991/jimet-15.2015.9How to use a DOI?

Keywords

demodulation, quantification, table look-up, computation complexity, Additive White Gaussian Noise

Abstract

This paper proposes a new demodulation structure by quantizing the constellation and using a lookup table. When the modulated noisy symbols are received by demodulation end, it’s not to calculate the Euclidean distances between a symbol and every constellation points, but quantize each dimension of this symbol’s coordinate value in the constellation, and check the bit soft values corresponding to this quantification point against a lookup table which is known by a pretreatment. The proposed method will omit a large number of the calculations for demodulation and simplifies the system. Employing look-up table instead of traditional computing can reduce the delay by 72.4% to 93.9% when the quantification interval is from 0.1 to 0.4. Meanwhile, the performance gain only reduces about 0.1dB.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jianping Li
AU  - Yameng Shi
PY  - 2015/12
DA  - 2015/12
TI  - A novel low-latency BICM system by quantizing the constellation on the demodulation end
BT  - Proceedings of the 2015 Joint International Mechanical, Electronic and Information Technology Conference
PB  - Atlantis Press
SP  - 39
EP  - 43
SN  - 2352-538X
UR  - https://doi.org/10.2991/jimet-15.2015.9
DO  - 10.2991/jimet-15.2015.9
ID  - Li2015/12
ER  -