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Study on Error Correction Method for Advanced Terrestrial DMB  

Choi, Gyoo-Seok (청운대학교 컴퓨터학과)
Jeon, Byung-Chan (청운대학교 방송영상학과)
Park, In-Kyoo (중부대학교 컴퓨터학과)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.10, no.5, 2010 , pp. 69-75 More about this Journal
Abstract
Advanced T-DMB(Terrestial DMB )system which is a new portable mobile broadcasting system has been developed to increase data rate up to double of conventional T-DMB in same bandwidth while maintaining backward compatibility, using hierarchical modulation method. The Advanced T-DMB system realize high qualification of conventional T-DMB system by adding BPSK signal or QPSK signal as enhanced layer to existing DQPSK signal. The enhanced layer signal should be small enough to maintain backward compatibility and to minimize the coverage loss of existing T-DMB service area. But this causes the enhanced layer signal of Advanced T-DMB susceptible to fading effect in transmission channel. In this paper we applied the duo-binary turbo code which has powerful error correction capability to the enhanced layer signal for compensating channel distortion. And the computer simulation results about the performance of the duo-binary turbo code in Advanced T-DMB system are presented along with analysis comments.
Keywords
T-DMB; Hierarchical modulation; Error correction; Turbo code;
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