A novel low-latency BICM system by quantizing the constellation on the demodulation end
- 10.2991/jimet-15.2015.9How to use a DOI?
- demodulation, quantification, table look-up, computation complexity, Additive White Gaussian Noise
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.
- © 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/).
Cite this article
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 -