Proceedings of the Korean Society of Broadcast Engineers Conference (한국방송∙미디어공학회:학술대회논문집)
- 1999.11b
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- Pages.173-178
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- 1999
A Design of the TCM Decoder for DAB Receiver
DAB 수신기용 TCM 디코더의 설계
- Kim, Duck-Hyun (Kwangju University) ;
- Kim, Geon (DAB System Team of ETRI) ;
- Park, So-Ra (DAB System Team of ETRI) ;
- Chung, Young-Ho (DAB System Team of ETRI) ;
- Oh, Kil-Nam (DAB System Team of ETRI)
- 김덕현 (광주대학교 컴퓨터전자통신공학부) ;
- 김건 (한국전자통신연구원 무선방송연구소 DAB팀) ;
- 박소라 (한국전자통신연구원 무선방송연구소 DAB팀) ;
- 정영호 (한국전자통신연구원 무선방송연구소 DAB팀) ;
- 오길남 (한국전자통신연구원 무선방송연구소 DAB팀)
- Published : 1999.11.01
Abstract
The Trellis Coded Modulation(TCM) allows the considerable achievements of coding gains compare with conventional multi-level modulation without compromising bandwidth efficiency. In this paper, we are presented a design of the parallel Viterbi decoder for 16-QAM TCM decoder with large constraint length (K=9), which can be applicable for the Digital Audio Broadcasting(DAB) receiver. As a mid-term result, a parallel Branch Metric Calculator (BMC)can compute 16 BMs within 3 clocks and a parallel 16 Add-Compare-Selects (ACS) unit can compute in a single clock. And also, two 256 Path Metric Memories (PMM) 32 Trace Back(TB) memories are specially designed with shuffle exchange switches for 16 parallel accesses. As a VHDL simulation, we can find the correctness of proposed model, which can be operated 16 S per symbol. Now, we are performing the hardware reduction for realtime operation and FPGA implementation.
Keywords