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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Performance Comparison and Improvement of STDR/SSTDR Schemes Using Various Sequences

여러 가지 수열을 적용한 STDR/SSTDR 기법의 성능 비교 및 개선

  • Han, Jeong Jae (The Catholic University of Korea, School of Information, Communications, and Electronics Engineering (ICEE), Communication Signal Processing (CSP) Lab.) ;
  • Park, So Ryoung (The Catholic University of Korea, School of ICEE, CSP Lab.)
  • Received : 2014.09.15
  • Accepted : 2014.11.03
  • Published : 2014.11.28
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Abstract

This paper investigates the detection performance of fault location using STDR(sequence time domain reflectometry) and SSTDR(spread spectrum time domain reflectometry) with various length and types of sequences, and then, proposes an improved detection technique by eliminating the injected signal in SSTDR. The detection error rates are compared and analyzed in power line channel model with various fault locations, fault types, and spreading sequences such as m-sequence, binary Barker sequence, and 4-phase Frank sequence. It is shown that the proposed technique is able to improve the detection performance obviously when the reflected signal is weak or the fault location is extremely close.

이 논문에서는 다양한 길이와 종류의 수열을 사용한 STDR(sequence time domain reflectometry) 및 SSTDR(spread spectrum time domain reflectometry) 기법의 고장위치 탐지 성능을 비교하고, SSTDR 기법의 성능 향상을 위한 인가신호 제거 방식을 제안한다. 대표적인 PN(pseudo-noise) 수열인 m 수열, 자기상관(autocorrelation) 성질이 우수한 이진(binary) Barker 수열과 4위상 Frank 수열을 사용하였을 때, 전력선 채널 모형에서 고장 유형, 고장위치, 제안 기법 사용 유무를 바꾸어가며 오탐지율을 비교 분석한다. 감쇠가 심할 때와 고장위치가 매우 가까울 때 제안한 인가신호 제거 방식을 사용하면 고장위치 탐지 성능을 크게 개선시킬 수 있음을 모의실험으로 확인한다.

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References

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