Research on Wireless Transmission System and Weak Signal Processing for Near Bit Measurement Tool

2021 ◽  
pp. 1283-1291
Author(s):  
Zhong Li ◽  
Jingang Jiao ◽  
Yi Wu ◽  
Renjun Xie ◽  
Zhibo Wang
Keyword(s):  
Signal Processing ◽  
Transmission System ◽  
Wireless Transmission ◽  
Measurement Tool ◽  
Weak Signal

scholarly journals Review on chaotic weak signal processing

2021 ◽  
Vol 1820 (1) ◽  
pp. 012055
Author(s):  
Meng Tong Wang ◽  
Shu Yong Liu ◽  
Ying Cai ◽  
Si Ting Li
Keyword(s):  
Signal Processing ◽  
Weak Signal

Design of embedded acoustic image acquisition system for wireless sensor network

2021 ◽  
pp. 1-8
Author(s):  
Xiaoping Huang ◽  
Fangyi Wen ◽  
Zhongxin Wei
Keyword(s):  
Transmission Rate ◽  
Image Acquisition ◽  
Transmission System ◽  
Video Data ◽  
Wireless Transmission ◽  
Acquisition System ◽  
Wireless Sensor ◽  
Acoustic Image ◽  
Image Acquisition System ◽  
Embedded Image

In recent years, with the development of communication technology, embedded computing technology and sensor technology, it has become increasingly mature. Micro sensors with sensing, computing and communication capabilities have appeared in large numbers and developed rapidly, making wireless sensor networks widely used. People put forward higher requirements for the accuracy, reliability and flexibility of the image acquisition system. The image transmission system using analog technology not only has low image quality, but also has a serious waste of system resources, is not easy to form a complex network structure, and has poor functional scalability. In view of the actual needs of the current image acquisition and wireless transmission system, based on embedded technology, image acquisition, processing technology and network transmission technology, this paper proposes and designs a low-cost, high-reliability embedded image acquisition and wireless transmission system. Experimental tests show that this system has reasonable design, high video coding efficiency, good image continuity, stable operation, and basically realizes the display, storage and playback functions of the collected video data. Improve the transmission rate of the system and reduce the distortion caused by compression in terms of image compression. At the same time, it supports multiple image resolutions, frame rate options and multiple video formats, and the system’s transmission rate can adapt to the state of the network. This design fulfills the basic requirements of an embedded image acquisition system based on network technology, and provides a good foundation for the next development of a gigabit network-based image acquisition system.

60 Gbit/s PAM-4 wireless transmission in the 310 GHz band with nonlinearity tolerant signal processing

2021 ◽  
pp. 126988
Author(s):  
Mengyao Qiao ◽  
Lu Zhang ◽  
Shiwei Wang ◽  
Wei Li ◽  
Zijie Lu ◽  
...  
Keyword(s):  
Signal Processing ◽  
Wireless Transmission

Design of Wireless Microwave Transmission System

2013 ◽  
Vol 441 ◽  
pp. 959-962
Author(s):  
Bin Wen Huang ◽  
Yuan Jiao
Keyword(s):  
Wireless Communication ◽  
High Frequency ◽  
Transmission System ◽  
Wireless Transmission ◽  
Broadband Wireless ◽  
Microwave Transmission

As a high-frequency and broadband wireless transmission system [, wireless microwave transmission system plays an important role in wireless communication family, especially in newest WiMax and 4G technology. Wireless microwave transmission system can be separated by indoor unit (IDU) and outdoor unit (ODU). This paper is focused on the design of IDU and ODU.

Ultra-high capacity long-haul PDM-16-QAM-based WDM-FSO transmission system using coherent detection and digital signal processing

2020 ◽  
Vol 52 (11) ◽  
Author(s):  
P. Sivakumar ◽  
C. S. Boopathi ◽  
M. G. Sumithra ◽  
Mehtab Singh ◽  
Jyoteesh Malhotra ◽  
...  
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
High Capacity ◽  
Digital Signal ◽  
Transmission System ◽  
Coherent Detection

Signal processing algorithm for thermal drift compensation in high-temperature down-hole instrumentation systems

2016 ◽  
Vol 39 (8) ◽  
pp. 1161-1168 ◽  
Author(s):  
Rito Mijarez ◽  
David Pascacio ◽  
Ricardo Guevara ◽  
Joaquin Rodriguez
Keyword(s):  
Signal Processing ◽  
High Temperature ◽  
Digital Signal Processor ◽  
Electronic Device ◽  
Processing Algorithm ◽  
Measurement Tool ◽  
Communication Link ◽  
Thermal Drift ◽  
Signal Processing Algorithm ◽  
Laboratory Test Results

Down-hole oil and gas industry requirements for measuring thermodynamic and geophysical parameters, for instance pressure, temperature, vibration and multiphase flow, are challenging. Accomplishing these necessities requires a complete signal communications chain of high-performance components and effective signal processing communication techniques to provide system reliability. Nevertheless, noise interference, cable attenuation and thermal drift of the front-end passive electronic elements can lead to poor signal-to-noise ratio (SNR) and possibly loss of the communication link. This paper describes a signal processing algorithm implemented in a bidirectional communication system that exchanges data from a down-hole high pressure and high-temperature (HPHT) measurement tool to the surface installation. The communication channel is a multi-conductor coaxial logging cable also used as a power supply transmission line. The instrumentation system consists of a proprietary down-hole measurement tool, composed of an HPHT sensor and a high-temperature digital signal processor (DSP)-based electronic device; located in the surface installation is a data-acquisition equipment. The system employs a signal processing algorithm, based on the frequency domain SNR characterization of the whole communication chain, which determines in real time the optimal carrier frequency that is automatically implemented in the selected modulation/demodulation technique. The obtained laboratory test results of the down-hole tool, using changes in temperature from 25° to 185°C, provide a firm basis for testing and evaluating the system in the field.

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