Communications Signal Processing Experiment Platform Web-based Design And Implementation

Undoubtedly, Communication signal processing experiment occupy an important position in teaching and application of communication engineering. However, traditional experiment methods have been unable to meet the growing needs of the experimental teaching. Nowadays, with the developing of network technology, the emergence of Web-based experimental platform effetively alleviate this situation.On the basic of the actual requirement analysis, this thesis introduces laboratory’s local area network design and build. Then implement remote network operation of communication signal processing experiments which accomplished on MATLAB, Lab VIEW and GNU Radio in different ways, uers are able to operate the specified exprimental by web browser.In the experimental teaching, MATLAB is a preferred paltform on communication signal processing simulation. This thesis take QPSK modulation and demodulation for example, compile MATLAB codes into Java component using MATLAB Buider JA. Then integrate the component into J2EE framework, utilize MCR operation and returns the result. That the whole process of QPSK modulation and demodulation is showed step by step on the page to the end users finally.LabVIEW, Virtual instrument software has a powerful signal processing capabilities. This thesis describes the use of LabVIEW and structure of USRP, the hardware equipment. By exploiting combination of USRP and LabVIEW, implement FM reception and demodulation system. Then using the Web publishing tool which comes with LabVIEW itself publish the system, users can change the experimental parameters, control experimental operation and observe results by the browser.GNU Radio in alliance with USRP is a significant design tool in open source terms of cognitive radio system. This thesis Simplely expounds how GNU Radio work, also achieves FM reception and demodulation system on Ubuntu. Finally end users control the whole process of signal processing on browser through the third-party remote control tool, NoMachine, which supports Web controlling features.Practices have proven that Web-based experimental platform of communication signal processing is a meaningful attempt. It combines the advantages of Web application, moves traditional experimental process onto the network, facilitates uers’ comprehension and operation, and offers a new approach for experimental teaching simultaneously.