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Broadband digital receiver suited for pulse compression signal

A signal matching and pulse compression technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of poor reconfigurability and different implementation methods of matched filters, achieve high sensitivity and dynamic loading characteristics, improve detection sensitivity, The effect of saving internal resources

Inactive Publication Date: 2009-11-04
HARBIN ENG UNIV
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Problems solved by technology

However, the matched filter involved is poorly reconfigurable or the matching implementation is not the same as the patent application

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  • Broadband digital receiver suited for pulse compression signal
  • Broadband digital receiver suited for pulse compression signal
  • Broadband digital receiver suited for pulse compression signal

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Embodiment Construction

[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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Abstract

The invention provides a broadband digital receiver suited for pulse compression signals, which comprises a high-speed A / D sampling module, FPGA, DSP, a global clock module, a PLL configuration module, an AD sampling configuration module and the like, wherein the FPGA comprises an LVDS module, a CODE module, a multiphase wave filtering module and an FIR wave filter module. The broadband digital receiver digitally receives the broadband signals, divides the signals in the frequency domain in a channelizing way, reduces the data transfer rate, and makes use of the FPGA to realize the suited receiving of the pulse compression signals. The DSP is responsible for the calculation and dynamic loading of the weight coefficient of the suited wave filter. Compared with the analogy method, the receiver has the characteristics of better equipment quantity and reliability, and high sensitivity and dynamic loading.

Description

(1) Technical field [0001] The invention relates to a signal detection and processing technology. (2) Background technology [0002] With the continuous development of electronic countermeasures technology, low probability of intercept (LPI) radar has been developed for the survival of radar itself. Among them, pulse compression technology is used to reduce the peak power of the transmitted signal. Due to the low peak power of radar signals, it is very difficult for conventional electronic reconnaissance systems to receive such signals, and even the existence of signals cannot be detected. The method of matching reception with pulse compression signal through matched filter can improve receiver sensitivity. An all-pass phase-shifting network composed of discrete elements, a dispersive delay line or a voltage-controlled oscillator (VCO), and a surface acoustic wave (SAW) device can all be used to match a pulse-compressed signal, but these methods lack flexibility. Conduciv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/285
Inventor 蒋伊琳司锡才张文旭郜丽鹏
Owner HARBIN ENG UNIV
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