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Conference Paper
Low Complexity Soft-Decision Demapper for Digital Video Broadcasting System
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- Authors
- Jang Woong Park, Myung Hoon Sunwoo, Pan Soo Kim, Dae Ig Chang
- Issue Date
- 2009-01
- Citation
- International Conference on Ubiquitous Information Management and Communication (ICUIMC) 2009, pp.1-6
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper presents a low complexity soft-decision demapper for a digital video broadcasting system. To achieve the performance required by Low Density Parity Check (LDPC) code decoding, the received signal should be soft-decided rather than hard-decided. However, for supporting higher-order modulation modes the soft-decision demapper requires high hardware complexity. The proposed soft-decision demapper can reduce the hardware complexity by reusing multipliers. Moreover, the proposed demapper can support higher-order modulation modes.In addition, we propose the efficient soft-decision demapper interface. The proposed interface can operate at a symbol rate and replace a Parallel to Serial (P/S) converter by locating between an M-Phase Shift Keying (PSK) demodulator and the proposed demapper. The proposed soft-decision demapper and interface have been verified in Xilinx TM Virtex II.
- KSP Keywords
- Broadcasting system, Digital video broadcasting, Hardware complexity, Higher order, Low density parity check (LDPC) code, Modulation mode, Soft-decision, low-complexity, phase shift keying, symbol rate