Design of Acoustic Well-Logging Data Interface and Data Transmission System Based on CAN Bus 基于CAN总线的声波测井地面数据接口与传输系统设计
Design of the acoustic signal transmission system based on CPLD 基于CPLD控制的声信号发射系统设计
Criteria For Evaluating An Underwater Acoustic Signal Transmission System 水声信息传输系统的评价指标及对具体系统的评估一例
A Research on the Logging While Drilling Acoustic Data Transmission Based on Periodic Drill String System 基于周期性钻柱系统的随钻数据声波传输方法研究
Some criteria for evaluating an underwater acoustic signal transmission system are briefed in this article. 本文简述了水声信息传输系统的评价指标,并对具体的水声遥控系统进行评估。
The design of the ppm-ptc acoustic transmission pattern in the telemetering system for the protection potential of the subsea pipe-line 海底管线保护电位遥测系统中PPM-PTC水声传输方式的设计
Multi-frequency array acoustic logging apparatus with fiber optic cable transmission system, which transmits signal at a speed of 10 Mbit/ s, and it's practical logging case are introduced in this paper. 介绍了光纤电缆传输系统传输速率为10Mbit/s的多频率阵列声波测井仪及实际测井案例。
The basic principle of multi-user underwater acoustic transmission system is proposed combining with spread frequency technology and OFDM. 提出了扩频与OFDM相结合的水声多用户传输系统的基本原理。
Underwater acoustic channel experiences severe Multi-path extension, high ambient noise, limited bandwidth, large transmission and propagation delay, fluctuation effect and great doppler frequency shift. These features greatly reduce the reliability and effectiveness of underwater acoustic communication system. 水声信道具有多径扩展、高环境噪声、带宽受限、传输时延大、起伏效应和多普勒频移大等特点,这极大地制约了水声通信系统的可靠性和有效性。
It is necessary that use blind process and blind equalization for ocean acoustic channel in order to enhance reliability of information transmission. ( 3) The techniques about blind identification and blind equalization of underwater acoustic channel, and blind identification of OFDM system are studied. 为提高信息传输的可靠性,就需要采用盲信号处理技术对信道进行盲处理和盲均衡。(3)研究了水声信道的盲辨识、盲均衡及OFDM系统的盲辨识技术。
According to the underwater acoustic signal transmission affected by the factors and the characteristics of the self-positioning system, the article establishes the positioning beacon signal mode. 本文首先介绍了漂浮式基站自主定位系统的原理以及总体结构,根据水声信号在水下传输受到的影响因素和自主定位系统的工作特点,确立了定位信标信号的工作方式。