Broadband digital receiver suited for pulse compression signal
A signal matching and pulse compression technology, used in radio wave measurement systems, instruments, etc., can solve the problems of different implementation methods, poor reconfigurability of matched filters, etc., to improve detection sensitivity, high sensitivity and dynamic loading characteristics, Favorable effect of equipment volume and reliability
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[0018] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0019] combine figure 1 . The digital signals sampled by high-speed A / D are sent to respective FPGAs at a relatively high rate (hundreds of megahertz). The factor is D (D is a fixed constant); and the data after the deceleration is adjusted through the CODE module 2 to complete the data adjustment; the adjusted data is sent to the polyphase filter module 3 by a total of D channels, wherein the polyphase filter module 3 It mainly includes D subband filters, D corresponding multiplication of complex coefficient factors and DFT operation at D points; using D subband filters to divide the broadband into D subbands, realizing broadband channelization; DSP filters FIR The coefficients of the device module 4 are written into the FPGA. When DSP calculates the parameters in the circuit, it needs to consider the width of the data / coefficient; the number of pipeline stage...
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