The Analysis of the DPSK Transmission Carrier Frequency of Time-Varying Channel Model of XCTD Profiler

DOI

10.2991/ceie-16.2017.68How to use a DOI?

Keywords

XCTD; Time-Varying Channel; DPSK Modulation; Transmission Carrier Frequency

Abstract

The distortion of transmission signal ,when passed through the channel of the Expendable Conductivity-Temperature-Depth (XCTD) profiler under the influence of the probing depth, transmission frequency, random noise and other factors, will be more serious. And it will affect the stability and accuracy of the DPSK transmission. This paper firstly establishes the model of XCTD channel and explains the theory of differential phase shift keying (DPSK) demodulation, which proposes that the selection of the demodulation carrier frequency is the key factor to affect the DPSK demodulation accuracy. Through specific analysis of the impact of the demodulation carrier frequency offset, we ascertain the best demodulation carrier transmission frequency satisfies the demand of the actual measurement within the range of detecting depth of 2000 meters. Meanwhile, we analyze that the increase of the probing depth and random noise based on the increase of transmission frequency has an influence on the size of bit error rate caused by the demodulation frequency offset. The results show that we can further optimize the design of the XCTD profiler measurement equipment, and improve the accuracy of the measurement data and the stability of the transmission signal.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Yu Zheng
AU  - Guomin Song
AU  - Yingsheng Shang
AU  - Xiangyu Jin
AU  - Xiaorui Wang
AU  - Lei Tian
AU  - Junwei Liu
PY  - 2016/10
DA  - 2016/10
TI  - The Analysis of the DPSK Transmission Carrier Frequency of Time-Varying Channel Model of XCTD Profiler
BT  - Proceedings of the International Conference on Communication and Electronic Information Engineering (CEIE 2016)
PB  - Atlantis Press
SP  - 534
EP  - 539
SN  - 2352-5401
UR  - https://doi.org/10.2991/ceie-16.2017.68
DO  - 10.2991/ceie-16.2017.68
ID  - Zheng2016/10
ER  -