• 한국정보통신학회논문지
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• 제26권10호
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• pp.1559-1562
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• 2022

As electronic devices technology scales down into the deep-submicron to achieve high-density, low power and high performance integrated circuits, multiple bit upsets by soft errors have become a major threat to on-chip memory systems. To address the soft error problem, single error correction, double error detection and double adjacent error correction (SEC-DED-DAEC) codes have been recently proposed. But these codes do not troubleshoot mis-correction problem. We propose the SEC-DED_DAEC code with without mis-correction. The decoder for proposed code is implemented as hardware and verified. The results show that there is no mis-correction in the proposed codes and the decoder can be employed on-chip memory system.

• 전기전자학회논문지
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• 제28권1호
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• pp.116-122
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• 2024

AMBA AHB-Lite 버스는 저전력 및 경제성 측면에서 SoC에 널리 사용되는 온칩 버스 프로토콜이다. 하지만 이 프로토콜은 종단간 데이터 무결성을 위한 에러 검출 및 정정이 불가능하다. 이로 인해 자동차와 같이 열악한 환경에서 동작하는 경우에 데이터 변질과 시스템 불안정을 일으킬 수 있다. 이러한 문제를 해결하기 위해 본 논문에서는 AMBA AHB-Lite 버스에 SEC-DED(Single Error Correction-Double Error Detection)를 적용하는 방법을 제안한다. 이는 전송 중 발생하는 데이터 에러를 실시간으로 감지하고 정정하여 종단간 데이터 무결성을 강화한다. 시뮬레이션 결과, 에러가 일어나도 실시간으로 이를 감지하고 정정하여 차량용 온칩 버스에서 종단간 데이터 무결성을 강화하는 것을 확인하였다.

• ETRI Journal
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• 제21권2호
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• pp.9-21
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• 1999

In this paper, to enhance the performance of ${\pi}$/4-DQPSK (${\pi}$/4-differential quadrature phase shift keying), the scheme using nonredundant multiple error correction is proposed and investigated. This scheme for the differential detection of ${\pi}$/4-DQPSK uses the signal output which is delayed for more than two time slots as the parity check bit and applies it to nonredundant multiple error correction. The proposed system was used for studying the performance of ${\pi}$/4-DQPSK with Nonredundant Error Correction (NEC) in additive white Gaussian noise (AWGN) and Nakagami fade modeled mobile communication channel, and it was observed that the performance increased as the error correction capability increased.

• 한국군사과학기술학회지
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• 제8권3호
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• pp.42-50
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• 2005

In this paper, a novel method is proposed how the ECC(Error Correction Code) in server system can be investigated and the robustness of each system against noisy environment and element failure in memory module has been verified. Chipset manufacturers have hided the algorithm of their Hamming code and the user has difficulty in verification of the robustness of each system. The proposed method is very simple, but the outputs of the experiment explain the core ability of error correction in server system and helps the detection of the failure element. On the basis of these results, we could expect the robustness of digitalized weapon system and the efficient design of our own error correction code.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권2호
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• pp.960-973
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• 2018

This paper presents design for error correcting algorithm of the time of flight (ToF) detection value in the light detection and ranging (LIDAR) system sensor. The walk error of ToF value is generated by change of the received signal power depending on distance between the LIDAR sensor and object. The proposed method efficiently compensates the ToF value error by the independent ToF value calculation from the received signal using both rising point and falling point. A constant error of ~0.05 m is obtained after the walk error correction while an increasing error up to ~1 m is obtained with conventional method.

• 한국통신학회논문지
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• 제22권7호
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• pp.1477-1486
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• 1997

Conventioally the decoding methods and the design of coset codes for burst synchronization and error detection have been based on the concept that slips occuring to the right or to the left with respect to a reference timing are corrected. In this paper we newly approach to the design of coset codes relying on the condition that only a single code word can exists in an observation interval, which provides an extentended view on the conventional approach. A theorem concerning the condition is presented. A combined burst synchronization and error detection system with maximum slip correction capability have been devised based on the theorem and a detection method is falsely accepted in the presented of channel errors. The false acceptance probabilities of the system are derived and its performance is analyzed through computer computation using the derived results.

• 한국통신학회논문지
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• 제19권5호
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• pp.912-919
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• 1994

본 논문에서는 확대 Hamming 부호를 이용한 새로운 오류제어선로부호를 제안하고 그 성능을 분석한다. 제안된 부호는 최소 Hamming 거리가 4이므로 기본적으로 한개의 오류를 정정할 수 있고 두개의 오류를 검출한 수 있다. 또한 선로부호에 사용되는 여분의 비트를 이용하여 오류검출 능력을 증가시킬 수 있다. 결과적으로 제안된 부호는 Hamming (7.4) 부호를 이용한 기존의 오류정정선로부호에 비해 부호율은 다소 떨어지나 저주파대역에서의 스펙트럼 특성이 더 우수하며 더 적은 복호비트오율을 가진다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 춘계학술대회 논문집
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• pp.504-509
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• 1995

In this paper, we developed a position correction system of industrial robot for door-chassis assembly task. With the aid of a dedicated vision system, industrial robot accomplished visually acceptable door-chassis's assembly task. The alogorithm of the position detection of notch and 2 dimesional position correction algorithm are noteworthy. The obtained algorithms were satisfatorily implemented for a real door-chassis model.

• 제어로봇시스템학회논문지
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• 제21권2호
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• pp.81-86
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• 2015

GPS position errors were corrected for guidance of autonomous vehicles. From the vision, we can obtain the lateral distance from the center of lane and the angle difference between the left and right detected line. By using a controller which makes these two measurements zero, a lane following system can be easily implemented. However, the problem is that if there's no lane, such as crossroad, the guidance system of autonomous vehicle does not work. In addition, Line detection has problems working on curved areas. In this case, the lateral distance measurement has an error because of a modeling mismatch. For this reason, we propose GPS error correction filter based on curve-modeled lane detection and evaluated the performance applying it to an autonomous vehicle at the test site.

• 한국통신학회논문지
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• 제17권3호
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• pp.240-246
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• 1992

In the paper, the differential detection techniques of 3-h CPM signals whose modulation index is varied periodically are proposed and their error performances are analyzed. We select the modulation index sets which are proper to the differential detection and propose the differential detectors which detect symbol with 3 bits per smapling period of 3T and detect a bit per sampling period of T. Applying the nonredundant error correction circuit and viterbi algorithm to differential detection of 3-h CPM. We ascertain the error performances are improved.