Airborne Clutter Inhibit The Development Of Real-time Processor

This thesis describes the development of clutter suppression of airborne radarsystematically. The characteristics of the ground clutter and moving target areanalyzed and provided, and the technical realization of clutter suppression of airborneradar is developed.Firstly, FFT is given to complete coherent integration and narrow filtering.Secondly, apply frequency estimate to get the center and width of the mainclutter. Based on the sum-spectral, the summation of different distance units under allDoppler frequency channels,the center of the main clutter can be estimated probably.Because melioration gene is given before application, the energy of the main cluttercan be calculated using dichotomy ,then can get the mark of Doppler frequencychannel, which be corresponded by the breadth of main clutter。Thirdly, making use of the mean model (ML) of mono pulse's CFAR to detecttargets.Finally, to get more accurate azimuth information of target, a mono pulseamplitude comparator between Σ?? channels is used to measure the deviationangle of target.This thesis chooses ADSP21160, which is suitable for high speed and real-timesignal processing, as the core chip to build the processing platform. For realization,real-time processor's principle and application are further elaborated, and parallelprocessing technique is adopted in the thesis. At the same time, this thesis analyzesthe excellence of the procedure, and makes some improvements on the method for thelimit of the ram of the chip DSP.The above-mentioned standpoints are confirmed their feasibilities throughsimulation and the actual real-time processing.