ISR (incoherent scatter radar) signal processing system based on alternate code modulation

A technology of signal processing and alternating codes, applied in radio wave measurement systems, instruments, etc., can solve the problems of no ISR signal processing system, high cost of incoherent scattering radar, and no unified standard for signal processing systems, etc., and achieve strong data throughput , improve signal processing speed, and meet the effect of large amount of calculation

Inactive Publication Date: 2011-11-23
XIDIAN UNIV
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Problems solved by technology

However, due to the high cost of incoherent scatter radars and the difficulty in construction and maintenance, there are only about ten incoherent scatter radars in the world at present. Therefore, there is no unified standard on how to implement the ISR signal processing system through hardware, so there is no corresponding ISR signal processing system. literature report

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  • ISR (incoherent scatter radar) signal processing system based on alternate code modulation
  • ISR (incoherent scatter radar) signal processing system based on alternate code modulation
  • ISR (incoherent scatter radar) signal processing system based on alternate code modulation

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[0034] refer to figure 1 , The ISR signal processing system based on alternating code modulation of the present invention includes: FPGA module, DSP module and power supply module. Among them, FPGA module and DSP module are bidirectionally connected through 21-bit address bus and 32-bit data bus. V, 1.6V and 2.5V voltages. External processing parameters and data signals are transmitted to the FPGA module through the bus, and the DSP module packs the final processing results into UDP packets for output.

[0035] refer to figure 2 , the DSP module in the system of the present invention is composed of 3 DSP chips, and the three DSP chips are connected through a link port that transmits data in a DMA mode. The 3 DSP chips are selected but not limited to ADI ADSP-TS201 chip, the maximum operating frequency is 600MHz, and the computing power is greater than 3000MIPS. The first chip DSP1 is used to receive the processing parameters and data transmitted by the FPGA module and fil...

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Abstract

The invention discloses an ISR (incoherent scatter radar) signal processing system based on alternate code modulation, and the system is mainly used for solving the problems that the traditional radar signal processing system cannot process an ionospheric scattering signal with large echo data amount and low signal-to-noise ratio and taking a soft target as the target. The system mainly comprises a DSP (Digital Signal Processor) module and an FPGA (Field Programmable Gate Array) module and a power supply module, wherein regarding alternate code modulation, the DSP module is mainly used for completing signal filtration, autocorrelation function calculation, autocorrelation accumulation and signal power spectrum calculation to obtain an autocorrelation function and a power spectrum evaluation result of an ionospheric plasma; the FPGA module is used for receiving and transmitting processing parameters and signal data, and performing digital down converter on the signal data; and the power supply module is used for supplying required work voltages for the FPGA module and the DSP module. The system has the advantages of high stability, high processing speed, strong data throughout and easiness for hardware implementation, can be used in the ISR signal processors, and performs ionospheric detection and parameter evaluation.

Description

technical field [0001] The invention belongs to the technical field of signal and information processing, relates to an incoherent scattering radar system, and can be used for ionosphere detection and parameter estimation. Background technique [0002] Ionospheric detection is of great significance to the study of radio communication, satellite navigation and other activities. Incoherent scatter radar ISR is a very effective means to detect the ionosphere from the ground, and the detection range can reach 60Km to 2000Km. When the incident radar electromagnetic wave encounters the plasma, it will be scattered. Since the plasma is in a state of random thermal motion, when the wavelength of the electromagnetic wave is much longer than the Debye length, the scattering of each electron and ion is incoherent scattering. The incoherent scattering signal is a typical random signal with a mean value of zero, but the autocorrelation function and power spectrum are not zero, and vario...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/32
Inventor 姬红兵李林杜鑫赵博
Owner XIDIAN UNIV
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