The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
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A study on the long distance data transmission of underwater acoustic sensor

수중 음향센서의 원거리 데이터 전송에 관한 연구

  • Received : 2018.11.06
  • Accepted : 2019.03.26
  • Published : 2019.03.31
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Abstract

This paper is a study result on long distance transmission of underwater acoustic sensor data over cable. The data transceiver is designed using the LVDS (Low Voltage Differential Signaling) transmission scheme, and the jitter characteristics are analyzed by measuring the long distance transmission signal through the cable. In order to reduce the jitter, a pre-emphasis technique is applied to compensate the transmitting signal to be attenuated by long distance transmission, and the transmission characteristics were verified according to the distance.

본 논문은 수중 음향센서 데이터의 원거리 케이블 전송에 관한 연구 결과이다. LVDS(Low Voltage Differential Signaling) 전송 방식으로 설계된 데이터 송수신기의 케이블에 대한 원거리 전송 신호를 측정하고 지터 특성을 분석하였다. 지터 특성을 저감하기 위하여, 원거리 전송에 따라 감쇠될 송신 신호를 역 보상하는 고역 강조(pre-emphasis) 기법을 적용하였으며, 전송 거리에 따라 송신 특성을 검증하였다.

Keywords

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Fig. 1. Definition of the jitter.

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Fig. 2. Diagram of the total jitter.

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Fig. 3. Diagram of the sensor data transceiver.

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Fig. 4. Test setup for jitter analysis (transmission distance: 0 m, 50 m, 100 m).

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Fig. 5. Eye-pattern for received LVDS (single driver) signal through the 100 m cable (measured by a differential probe).

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Fig. 6. Jitter measurement result for received LVDS (single driver) signal through the 50 m cable.

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Fig. 7. Jitter measurement result for received LVDS (single driver) signal through the 100 m cable.

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Fig. 8. LVDS data transmission techniques.

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Fig. 9. Diagram of the long distance cable transmission for underwater acoustic sensor data.

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Fig. 10. Eye-pattern for received LVDS (parallel driver) signal through 50 m cable (measured by single-ended probes).

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Fig. 11. Eye-pattern for received LVDS (parallel driver) signal through 100 m cable (measured by single-ended probes).

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Fig. 12. Eye-pattern for received LVDS (pre-emphasis) signal through 100 m cable (measured by a differential probe).

Table 1. Jitter measurement results.

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References

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