- Tytuł:
- Low-Complexity Non-uniform Constellation Demapping Algorithm for Broadcasting System
- Autorzy:
-
Wang, Chen
Wang, Fang
Li, Mingqi
Tian, Jinfeng - Powiązania:
- https://bibliotekanauki.pl/articles/226497.pdf
- Data publikacji:
- 2019
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
non-uniform constellation
soft demapping
complexity
QAM
NGB-W - Opis:
- This paper presents a novel low-complexity soft demapping algorithm for two-dimensional non-uniform spaced constellations (2D-NUCs) and massive order one-dimensional NUCs (1D-NUCs). NUCs have been implemented in a wide range of new broadcasting systems to approach the Shannon limit further, such as DVB-NGH, ATSC 3.0 and NGB-W. However, the soft demapping complexity is extreme due to the substantial distance calculations. In the proposed scheme, the demapping process is classified into four cases based on different quadrants. To deal with the complexity problem, four groups of reduced subsets in terms of the quadrant for each bit are separately calculated and stored in advance. Analysis and simulation prove that the proposed demapper only introduces a small penalty under 0.02dB with respect to Max-Log-MAP demapper, whereas a significant complexity reduction ranging from 68.75% to 88.54% is obtained.
- Źródło:
-
International Journal of Electronics and Telecommunications; 2019, 65, 3; 413-420
2300-1933 - Pojawia się w:
- International Journal of Electronics and Telecommunications
- Dostawca treści:
- Biblioteka Nauki
Artykuł