طراحی گره بی سیم بر اساس AR9341
Abstract
1-Introduction
2-Schematic and PCB Design
3-Experimental Results Show
4-Conclucion
Acknowledgement
References
Abstract
In the process of news interviews, the last mile of data transmission from the reporter terminal to the system collection center has been using wired transmission. It has poor mobility and weak scalability. According to this situation, a hardware design based on the AR9341 wireless node is proposed. It makes full use of the advantages of better wireless transmission scalability and more flexible mobility. Firstly, its RF module is discussed in detail, and signal quality is ensured by Impedance Matching and Differential Routing. Secondly, its memory module is described, and the transmission performance of the system is analyzed through the eye diagram of the DDR signal lines. Finally, the Spectrum, Constellation and error vector magnitude (EVM) are measured by the spectrum analyzer to test the quality of the wireless signal and verify the feasibility of the design.
Introduction
News is an important way for us to obtain information from the outside world. Traditionally, the last mile of data transmission in the news interview relies on wired connections from reporter terminals to system collection centers. However, with the surge of global emergencies, the environment of news gathering has become complicated. The shortcomings of traditional wire connections are also increasing. Firstly, it has poor mobility. Cable is used as the main medium for wired transmission. You need to re-lay the cable if the interview environment changes, which is time-consuming and laborious. Secondly, the expansion is weak. If you add a new device, you need to re-route, when the port reserved by the original wiring is not enough.