The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

The Bit Synchronizer of The Frequency Hopping System using Adaptive Window Filter

적응윈도우 필터를 이용한 주파수 도약용 비트 동기방식

  • 김정섭 (국방과학연구소 위성통신연구실 정회원) ;
  • 황찬식 (경북대학교 전자공학부 디지털통신연구실 정회원)
  • Published : 1999.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we propose a bit synchronizer which is suitable for frequency hopping systems. The proposed bit synchronizer is an ADPLL in which the digial loop filter is combined with an error symbol detecting circuit using an adaptive window. Suppressing the tracking process when hop mute and impulse noises are detected improves the performance of the digital loop filter and enhances the probability of the frequency hopping system. The simulation results demonstrate an improved performance of the proposed bit synchronizer compared with existing ones.

본 논문에서는 주파수 도약 방식 시스템에 적합한 비트 동기 방식을 제안한다. 제안한 비트 동기 방식은 적응 윈도우를 이용한 에러 심볼 검출기를 고안하여 이를 기존의 디지털 루프 필터와 결합한 ADPLL 방식이다. 제안된 비트 동기 방식은, 홉뮤트 잡음과 임펄스 잡음 등과 같은 잡음 구간에서, 비트 추적을 억제하여 디지털 루프 필터의 성능을 향상시키고, 주파수 도약 시스템에서의 동기 확률을 개선시켰다. 모의 실험 결과, 제안한 비트 동기 방식이 기존의 방식에 비해서 더욱 개선된 성능을 보여줌을 입증하였다.

Keywords

References

  1. Proc. IEEE v.63 Phase-locked loops S.C. Gupta
  2. Synchronization Systems in Communication and Control W. C. Lindsey
  3. Phase Lock Techniques(2nd ed.) F. M. Gardner
  4. IRE Trans. Communication Systems v.CS-8 Digital Phase Control Techniques Westlake, P. R.
  5. IEEE Trans. Aerospace and Electronics Gated Phase Lock Loop Study Eisenberg, B. R;
  6. IEEE Trans. on Communications First Order Discrete Phase Locked Loop with Application to Demodulation of Angle Modulated Carrier Gill, G. S.;S. C. Gupta
  7. Analysis of First and Second Order Binary Quantized Digital Phase-Locked Loops for Ideal and White Gaussian Noise Inputs Blasche, P. R
  8. IEEE Trans. on Communication v.COM-20 no.2 Phase Noise and Transient Times for a Binary Quantized Digital Phase Locked Loop in White Gaussian Noise Cessana, J. R;Levy, D. M
  9. IEEE Trans. on Communications Performance of a First Order Transition Sampling Digital Phase Locked Loop Using Random Walk Models Holmes, J. K.
  10. On a Class of All Digital phase Locked Loops : Modeling, Analysis and Application Reddy, C. P.
  11. IEE Proceeding v.136 no.1 All digital Phase Locked Loops : Concert, Design and Application Shayan, Y. R.;Le-Ngoc, T.
  12. IEEE Trans. on Communication v.COM-35 no.11 Performance Improvement of DPLL's in Non-Gaussian Noise Using Robust Estimators Mcgillem, C. D;Mccain, W. B.
  13. Phase-Locked Loops (3rd ed.) Roland, E. Best