Proceedings of the Korean Society of Broadcast Engineers Conference (한국방송∙미디어공학회:학술대회논문집)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
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A Design of the TCM Decoder for DAB Receiver

DAB 수신기용 TCM 디코더의 설계

  • 김덕현 (광주대학교 컴퓨터전자통신공학부) ;
  • 김건 (한국전자통신연구원 무선방송연구소 DAB팀) ;
  • 박소라 (한국전자통신연구원 무선방송연구소 DAB팀) ;
  • 정영호 (한국전자통신연구원 무선방송연구소 DAB팀) ;
  • 오길남 (한국전자통신연구원 무선방송연구소 DAB팀)
  • Published : 1999.11.01
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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.

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