Research And Engineering On Portable Broadband Electronic Reconnaissance Signal Processing Technology

Facing the increasingly complex and growing electromagnetic battlefield environment,based on the highly integrated SoC chip introduced by various chip companies in the 5G era,this paper discusses the portable broadband electronic reconnaissance signal processing technology and its engineering implementation,and proposes a zero-IF system architecture model based on ADC+DSP.As an important development direction of highly integrated So C,this architecture conforms to the concept of C-SWaP(cost,size,weight,and power),breaking the traditional design thinking of ADC+FPGA+DSP,eliminating the need of expensive FPGA and ASIC,and makes the package size of the whole system smaller and power consumption lower.The design of the handheld real-time spectrum analysis system is achieved with the functions of 81 MHz electromagnetic spectrum situational awareness and LFM signal sorting.Theoretically,the maximum real-time bandwidth is 228.57 MHz.Aiming at the non-cooperative mechanism in electronic reconnaissance,this paper introduces a linear frequency modulation(LFM)signal processing method based on the combination of fractional Fourier transform(FrFT)and wavelet transform.Compared with the traditional pulse compression(PC)algorithm,this algorithm does not need to search the carrier frequency,so it reduces the errors caused by the carrier frequency term in the non-cooperative radar signal processing.After simulation analysis,this paper presents the performance testing curves of the proposed algorithm and traditional pulse compression for carrier frequency offset under different SNR.