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"This paper discusses the performance of different windows functions when they are applied in a radar system during pulse compression. The paper proposes too the implementation of aradar processing procedures in real time mode on FPGA architecture. The radar signal compression processing is done with matched filter applying classical and novel window functions, where we focus to study better solution for the sidelobes decreasing. Experimental results show that best results for pulse compression performance have been obtained using atomic functions, improving the performance of the radar system in the presence of noise, and getting small degradation in range resolution. Implementation of the signal processing in the radar system in real time mode is discussed and justified the effectiveness of the proposed hardware."