Flexible‐rate optoelectronic wireless transmission system at 101 GHz using multiband CAP‐PAM modulation and envelope detection

2021 ◽  
Author(s):  
Jiao Zhang ◽  
Qinru Li ◽  
Qingyi Zhou ◽  
Min Zhu ◽  
Shuang Gao ◽  
...  
Keyword(s):  
Transmission System ◽  
Wireless Transmission ◽  
Envelope Detection ◽  
Flexible Rate

Flexible-rate Photonic-aided Wireless Transmission System at 101-GHz Based on Multi-Band CAP-PAM Modulation

2021 ◽  
Author(s):  
Qinru Li ◽  
Jiao Zhang ◽  
Min Zhu ◽  
Qingyi Zhou ◽  
Weiliang Xu ◽  
...  
Keyword(s):  
Transmission System ◽  
Wireless Transmission ◽  
Flexible Rate ◽  
Multi Band

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.

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.

scholarly journals Power Allocation Algorithm for an Energy-Harvesting Wireless Transmission System Considering Energy Losses

Algorithms ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 25
Author(s):  
Su Zhao ◽  
Gang Huang ◽  
Qi Zhu
Keyword(s):  
Energy Harvesting ◽  
Power Allocation ◽  
Online Algorithm ◽  
Optimization Methods ◽  
Low Complexity ◽  
Transmission System ◽  
Wireless Transmission ◽  
Energy Losses ◽  
Average Throughput ◽  
Allocation Algorithm

For an energy-harvesting wireless transmission system, considering that a transmitter which can harvest energy from nature has two kinds of extra energy consumption, circuit consumption and storage losses, the optimization models are set up in this paper for the purpose of maximizing the average throughput of the system within a certain period of time for both a time-invariant channel and time-varying channel. Convex optimization methods such as the Lagrange multiplier method and the KKT (Karush–Kuhn–Tucker) condition are used to solve the optimization problem; then, an optimal offline power allocation algorithm which has a three-threshold structure is proposed. In the three-threshold algorithm, two thresholds can be achieved by using a linear search method while the third threshold is calculated according to the channel state information and energy losses; then, the offline power allocation is based on the three thresholds and energy arrivals. Furthermore, inspired by the optimal offline algorithm, a low-complexity online algorithm with adaptive thresholds is derived. Finally, the simulation results show that the offline power allocation algorithms proposed in this paper are better than other algorithms, the performance of the online algorithm proposed is close to the offline one, and these algorithms can help improve the average throughput of the system.

Method of Dynamic Detection for Clutch of Real Vehicle Based on RFID Technology

2012 ◽  
Vol 605-607 ◽  
pp. 1031-1037
Author(s):  
Li Hui Yu ◽  
Li Rong Wang
Keyword(s):  
Service Life ◽  
Real Time ◽  
Detection Method ◽  
Transmission System ◽  
Wireless Transmission ◽  
Rfid Technology ◽  
Transmission Method ◽  
Simulation Results ◽  
Dynamic Detection ◽  
Real Vehicle

In this paper, we discussed a method of dynamic detection for clutch of real vehicle based on RFID technology. Clutch is a key component in vehicle. It ensures smooth start and shift and prevents overload of transmission system. Traditional detection method is to measure on a simulated working table. But the combining process of start and shift in bad condition can bring other troubles which lead to possible damage and reduce the service life of clutch. So, it is very important to detect Clutch of real vehicle in real time. Firstly, we discussed clutch of real vehicle important parameter. Secondly, a wireless transmission method is provided by RFID. Finally, a simulation results is given.

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