Paper Info
Title
DSP implementation of sqrt(M)-Best rotated QAM soft-demapper
Abstract
In the second generation terrestrial digital video broadcasting (DVB-T2) systems, one of the important features is the usage of rotated quadrature amplitude modulation (QAM) to exploit signal space diversity. However, the implementation of soft-demapper is very challenging and becomes more complex as the modulation order increases. Recently, a √(M)-best soft-demapper was proposed which can achieve the same performance as the full search scheme but with low complexity. In this paper, we implement the √(M)-best soft-demapper on a digital signal processer (DSP) with a coarse-grained reconfigurable array (CGRA) architecture. The best candidate selection algorithm is accordingly modified for friendly implementation. Our results show that the √(M)-best soft-demapper can be implemented with 82% less cycles than the full search based soft-demapper for the most complex 256-QAM case.
Year
DOI
Venue
2014
10.1109/ICASSP.2014.6855070
ICASSP
Keywords
Field
DocType
modulation order,soft-demapper,second generation terrestrial digital video broadcasting systems,qam,rotated qam,dsp,rotated quadrature amplitude modulation,digital signal processing chips,best candidate selection algorithm,cgra architecture,dsp implementation,quadrature amplitude modulation,signal space diversity,√m-best,digital video broadcasting,dvb-t2,dvb-t2 systems,coarse-grained reconfigurable array architecture,full search scheme,digital signal processor,kernel,digital signal processing,computer architecture
Digital signal processing,Computer science,Artificial intelligence,Digital Video Broadcasting,Computer hardware,Quadrature modulation,Modulation order,Quadrature amplitude modulation,Pattern recognition,Digital signal,QAM,Analog transmission,Embedded system
Conference
ISSN
Citations 
PageRank 
1520-6149
0
0.34
References 
Authors
4
5
Name
Order
Citations
PageRank
Peng Xue1153.06
Kitaek Bae2537.08
Kyeongyeon Kim310113.54
Navneet Basutkar4172.00
Ho Yang5316.03