A Study on the Channel Modeling of Slope Equalizer and Its Digital Implementation for Digital Radio Relay System

디지털 무선 전송장치를 위한 기울기 등화기의 채널 모델링 및 디지털 구현에 관한 연구

  • 서경환 (경남대학교 지식정보공학부 전자공학과)
  • Published : 2001.08.01


In this paper, as one of countermeasure techniques for a frequency selective fading, a digital slope equalizer(DSE) for 64-QAM digital radio relay system is analyzed in terms of principle, channel modeling, and digital implementation. Also computer simulations have been performed for DSE with a complex 13-tap adaptive time domain equalizer chip. It is shown that about 4.5 dB improvement in system signature can be obtained at the channel edge, and a variety of simulated results are reviewed in view of DSE modeling limit, operating frequency, control coefficient, signal constellation, and system signature. Finally, the functions of DSE chip confirmed up to 61 MHz clock operation are illustrated.



  1. Proc. IEEE ICC Fully digital adaptive slope equalizer for advanced digital radio system B. Lankl;G. Sebald
  2. Proc. Asia Pacific Microwave Conference Improvement on system performance based on the modified IF in-phase combiner for space diversity radio links I. K. Hwang;K. W. Suh;M. S. Rhee;D. Y. Lee
  3. The theory and practice of modem design John. A. C. Bingham
  4. Proc. 3rd ECRR A simplefied if autoadaptive slope equalizer P. Marchand
  5. Digital line-of-sight radio links: a handbook A. A. R. Townsend
  6. ITU-T 권고 G.707 Network node interface for the synchronous digital hierarchy
  7. 춘계 마이크로파 및 전파학술대회 v.21 no.1 STM-1급 디지털 마이크로웨이브 전송 장치에 적용된 적응 기울기 등화기의 설계 및 제작 홍완표;윤정상;하헌태;이정형;서경환
  8. Proc. 3rd ECRR A new generation of SDH radio relay system for 1*155/2*155/4*155 Mb/sec W. Bourdon;W. Geidel;G. Lange;J. G. Neideck
  9. Digital signal processing A. V. Oppenheim;R. W. Schafer
  10. Proc. IEEE Globecom Implementation of a single multi-task chip: ATDE, XPIC and DF applicable to muti-level QAM digital radio system K. W. Suh;C. Y. Park;D. Y. Lee
  11. IEEE JSAC v.SAC-5 no.3 Advanced time-and frequency-domain adaptive equalization in multilevel QAM digital radio system G. Sebald;B. Lankl;J. A. Nossek
  12. 대한전자공학회 v.35 no.11 동기식 디지털 계위의 동일채널 무선전송장치 구현 및 성능 분석 서경환
  13. Bell Syst. Tech. J. v.58 no.5 A new selective fading model: application to propagation data W. D. Rummler
  14. 대한전자공학회 추계종합학술대회 v.16 no.2 13-tap ATDE 및 64-QAM과 연동된 디지털 기울기의 성능 분석에 관한 연구 허기영;서경환;안종영