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Design of a Bit Interleaver for the High-order Constellation DVB-T2 System
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- Authors
- Inwoong Kang, Kyu-Soon Ok, Youngmin Kim, Jae Hyun Seo, Heung Mook Kim, Hyoung-Nam Kim
- Issue Date
- 2014-06
- Citation
- International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB) 2014, pp.1-4
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- Since the DVB-T2 system provides high spectral efficiency among commercialized digital terrestrial transmission (DTT) systems, it has been considered as a prospective option for the base system of next generation DTT systems providing UHDTV service. However, when the high order modulation scheme such as 1024-QAM is employed, a bit interleaver in DVB-T2 should be newly designed. The design of a bit interleaver aims to improve the decoding performance not only by obtaining time diversity gain but also by eliminating multi-edge symbols. Although there are a few literatures about the design of a bit interleaver exploiting the multi-edge elimination, they cannot be directly applied to the bit interleaver of the DVB-T2 because they work as a group with a bit-to-cell demultiplexer. In this respect, this paper presents a bit interleaver design procedure for the high-order constellation DVB-T2 system. The proposed procedure generates bit interleavers for any modulation orders and makes it possible that a newly designed bit interleaver performs multi-edge elimination with all the LDPC code rates. Simulation results show that a newly designed bit interleaver for 1024-QAM achieves about 0.6dB SNR gain over a random interleaver under a Rayleigh fading channel. © 2014 IEEE.
- KSP Keywords
- 1024-QAM, DVB-T2, Design procedure, Diversity gain, High order modulation, High spectral efficiency, Interleaver Design, LDPC codes, Modulation scheme, Multi-Edge, Random interleaver