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.
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