Graphic Display Of Broadband Signal Real Time Spectrum Data

Real-time spectrum analyzer is one of the indispensable important instrument testing,thanks to its efficient data processing ability,unique frequency template trigger and diverse graphic display function,can realize the seamless capture analysis of RF signal.In this thesis,on the basis of real-time spectrum analysis system architecture,based on the real-time spectrum analyzer to measure and display mode of requirements analysis,design a real-time spectrometer to measure the data of the architecture and function of graphic display module,expanded the original instrument singles chart,two-dimensional signal display mode,the instrument can change characteristics of measured signal in the frequency domain process for testing.The main research contents are as follows:1.For the transient signal characteristics in the real-time display technology of data in different formats,including 2D curves show that three dimensional spectrum density light display and spectrogram display several waveform display technology.Through the Windows of the underlying graphics display drive technology,the design is a pseudo color image processing technology to realize the bitmap format,according to data and set up the mechanism of light to capture the signal details changes over a period of time.2.Design of the real-time spectrum auxiliary measurement and analysis function,includes the realization of Marker measurement function;Design FMT(frequency template trigger)function.It can detect weak signal in real-time spectrum data,and provide custom edit template to match hardware implementation to trigger storage function;In order to facilitate the user to observe the local small signal,the local zoom and translation function are designed.3.In the face of the CPU the shortage problem of ability to deal with a large number of real-time spectrum data,using the GPU parallel computing features,research the GPU technology in three dimensional spectrum density light show to speed up the I/Q data applications.It involves FFT processing,compression data amplitude,elimination of isolated frequency points and three-dimensional compression of the spectrum.4.Using the hybrid programming communication mechanism,the interaction between the upper interface function module and the underlying graphical display module is realized;In the upper interface function module,window management,instrument command control and measurement data processing are designed,and software functions such as window management and hardware control are realized.The paper completed the design of the whole real-time spectrum analyzer software system and tested the test results on the real-time spectrum platform,and the test results achieved the design expectation.