Research On Detection And Synchronization Technique For Burst Communication Signals

The research topic in the paper is selected and provided based on the organization tasks, it's core research contents are concentrated on the signal interception and parameter estimation. The main topics include:Burst communication signal detection:according to the characteristics of the burst signal, energy detection method is used. Signal is also modeled as stationary random process,then double sliding window algorithm is given. This method needn't any signal prior information and has very good detection performance.Secondly, wavelet transform based communication signal analysis is discussed. The relationship between the wavelet transform coefficient and the signal parameteres is derived. The simulation results shows that the algorithm has good antinoise performance and can effectively improve the reconnaissance workload.Thirdly, the key technology of communication synchronization is researched. The research emphasis is on the communication synchronization of the carrier synchronization, symbol rate synchronization, delay synchronization and phase synchronization techniques.Because Pisarenko harmonic estimation method only needs to solve a quadratic multinomial equation, thus calculations quickly, very suitable for emergency communication carrier estimate. In order to improve our synchronous precision, frequency offset is also estimated by the use of structural nonlinear function.Symbol rate estimation method are focused on wavelet transform based and signal circulation autocorrelation based estimation methods. Symbol timing synchronization is basically feedforward timing estimator involved nonlinear function:square rate, quartic, absolute value and logarithmic function analyses. Phase is estimated based on the nonlinear signal processing, by remove the modulation information. The above algorithms have the important reference value for burst signal recovery and code information recovery and decision-making for preparation.