A shuffled iterative bit-interleaved coded modulation receiver for the DVB-T2 standard: Design, implementation and FPGA prototyping
Résumé
Rotated QAM constellations improve Bit-Interleaved Coded Modulation (BICM) performance over fading channels. Indeed, an increased diversity is obtained by coupling a constellation rotation with interleaving between the real and imaginary components of transmitted symbols either in time or frequency domain. Iterative processing at the receiver side can provide additional improvement in performance. In this paper, an efficient shuffled iterative receiver is investigated for the second generation of the terrestrial digital video broadcasting standard DVB-T2. Scheduling an efficient message passing algorithm with low latency between the demapper and the LDPC decoder represents the main contribution. The design and the FPGA prototyping of the resultant shuffled iterative BICM receiver are then described. Architecture complexity and measured performance validate the potential of iterative receiver as a practical and competitive solution for the DVB-T2 standard.
Mots clés
radio receivers
quadrature amplitude modulation
modulation coding
iterative methods
iterative decoding
interleaved codes
time-frequency analysis
DVB-T2 standard
FPGA prototyping
LDPC decoder
constellation rotation
fading channels
frequency domain
imaginary components
iterative processing
message passing algorithm
rotated QAM constellations
shuffled iterative BICM receiver
shuffled iterative bit-interleaved coded modulation receiver
terrestrial digital video broadcasting standard
digital video broadcasting
field programmable gate arrays
Domaines
Electronique| Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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