Design And Implementation On Real-time Spectrum Analysis Function For Handheld Software Defined Radio Platform

In the wild, in order to establish a rapid, reliable communication, there is a need for real-time monitoring and analyzing of the signal spectrum, which raises the new demand for portability of spectrum monitoring devices and the approach of analysis.Currently, most of the spectrum monitoring devices using sweep-type approach, are bulky and difficult to carry. In the contrast, the handheld software radio platform has nice features such as easy to carry, analyzing approach reconfigurable.Therefore, the project took advantages of the software platform and re-configured it to realize the ability to monitor and analyze real-time spectrum.The project contains following parts:First, analyze of real-time spectrum analysis algorithm. By Combining platform hardware architecture and the project requirements, an algorithm adopting a combination of decimation filtering, fast Fourier transform, frame overlapping programs and templates triggering technology was proposed, and tested in MATLAB simulation.Second, software was designed. Based on proposed real-time spectrum analysis algorithm and features of handheld software radio hardware platform, functional module and interface design were completed on the FPGA, and tested in behavioral level simulation by using Model Sim.Third, complete of the test and analysis of real-time spectrum. On the handheld software radio platform, the functional modules and interfaces for real-time spectrum analysis were tested in the real environment, and real-time spectral analysis software was debugged in Android; then the frequency monitoring range and error, power monitoring range and error were tested and analyzed. Through the test, the device was able to monitor signals within the frequency range of 225 MHz ~ 400 MHz and completed analysis of real-time bandwidth of 2MHz.Other specifications of the device were minimum frequency resolution of 50 Hz, the signal frequency error of 3PPM, power error of 3d Bm.The project designed and implemented real-time spectrum analysis on the handheld software radio platform, the actual tests suggested that the device was more portable and viable to conduct real-time spectrum monitoring in the wild.