Frequency Hopping Signal Detection And Parameter Estimation Algorithm And Implementation

Due to excellent anti-interference and confidentiality characteristics, frequency hopping communications are widely used in military and civilian fields. Hopping Radios for the blind detection and blind Parameter Estimation is the most urgent task.For signal hopping blind detection and parameter blind estimation is based on time-frequency analysis method. Existing methods are time-frequency analysis such as algorithm STFT, PWVD algorithm, SPWVD wavelet transform algorithm and analysis algorithms. This paper combines spectrum analyzer project development, based on the FFT algorithm overlapping frames. Combined STFT and Morlet wavelet transform theory, improved blind parameters estimation method and blind detection methods of frequency hopping signals, the final verification algorithms on the spectrum analyzer.The main work of this thesis is as follows:1.With the theory of time-frequency analysis,I simulated process of Frequency Hopping Signal Detection and Parameter Estimation. Based on STFT, WVD distribution, PWVD distribution, frequency hopping SPWVD distribution and wavelet transform,comparative analysis frequency hopping blind parameters estimation performance such as hop period, frequency hopping bandwidth.2.With the spectrum analyzer platform,,I started Frequency Hopping Signal Detection and Parameter Estimation based upon overlapping frames FFT theory.Estimation method achieve frequency hopping, the hopping rate estimation methods and jumping and hopping time period overlapping and dynamic programming method long frame interval. Hopping parameter estimation method detailed design. Complete overlapping frames FFT applications and theoretical analysis, control test indicators overlapping frames FFT analysis of scenarios and performance.Thirdly,I improved composite algorithm design ideas, took it into implementation and realization of simulation and analysis of the indicators related test parameters. This paper improved the algorithm design ideas, implementation and realization of simulation and analysis of the indicators relevant tests parameters.3.Based on STFT theory and Morlet wavelet transform theory, I achieve frequency hopping signal blind detection and blind parameters estimation. We solved the keyproblem such as DOA predict,Fast estimation of frequency hopping,Hopping and hopping cycle time fast estimation,Time Domain Analysis Method removal and so on. I completed the adaptive thresholding, time signal and interference correlation method to estimate the parameters of the detailed design. In Matlab simulation algorithm in noise suppression, hopping period is estimated transition time estimate, the estimated frequency hopping and other aspects of performance. I calculated based on the complexity of the algorithm STFT and Morlet wavelet algorithm.4.In the spectrum analyzer platform,I developed Frequency Hopping Signal Detection and Blind Parameter estimation based on STFT and Morlet wavelet. In VC6.0 development tool, the Matlab code to C code. The algorithm package in the form of a.dll, hair thread calls for increasing the frequency hopping signal analysis.Completed the overall design platform,we achieve design STFT and Morlet wavelet algorithm. Build a test platform based on frequency hopping, I hopped to get high-speed test data, the estimated value of FH Signal Parameter Analysis.