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High-speed real-time pulse compression algorithm

A pulse compression and algorithm technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of increasing signal time width, poor flexibility and stability, difficult impedance matching, etc. simple effect

Active Publication Date: 2017-03-22
ANHUI BOWEI CHANGAN ELECTRONICS
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Problems solved by technology

However, when the peak power of the transmitting and feeding equipment of the system is limited, the large signal energy can only be solved by increasing the time width of the signal
[0003] At present, the frequency analysis method is often used for pulse compression. This method has the advantages of simple principle, easy implementation, and convenient debugging and measurement. It is a main method in the current high-frequency ground wave radar system. There are problems such as difficult impedance matching, poor flexibility and stability, and unsatisfactory pulse pressure effect.

Method used

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Embodiment Construction

[0022] When executing the system initialization program, it is necessary to set the parameters of the system's control status register, external memory interface control register, etc., to ensure that the system works normally as required. In order to improve the system efficiency, set the length of the external DMA reading, and read the data into the on-chip RAM from the external space through the DMA channel. The read-in fixed-point number is converted into a floating-point number through the number shape, and then the FFT transformation subroutine is carried out, and the base 2FFT transformation of the corresponding length point is used. For the inverse transformation, it can be directly realized by the previous FFT algorithm, that is, the input frequency domain sequence is first performed. The real part data and the imaginary part data are transformed, and then the FFT operation is performed. Finally, it is divided by the number of FFT transformed data, and the data is nor...

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Abstract

The invention discloses a high-speed real-time pulse compression algorithm. The algorithm comprises reading a state character, and selecting parameters such as a frequency modulation signal, a distance and the like; reading the frequency modulation signal; converting integer numbers into floating numbers; performing fast Fourier transform (FFT); performing complex multiplication on an FFT result and the weight of a corresponding parameter; performing FFT; performing normalization operation, and converting the floating numbers into the integer numbers; and writing a pulse pressure signal and storing the signal. The high-speed real-time pulse compression algorithm has the advantages of small calculation complexity, highly-efficient and rapid pulse compression, and the like.

Description

technical field [0001] The invention relates to a high-speed real-time pulse compression algorithm. Background technique [0002] Radar requires both distance measurement and speed measurement. Under the premise of ensuring a certain output signal-to-noise ratio, the measurement accuracy and resolution require the same signal form. Ranging accuracy and distance resolution mainly depend on the frequency structure of the signal, while speed measurement accuracy and speed resolution depend on the time structure of the signal. In order to improve the ranging accuracy and distance resolution, the signal is required to have a large bandwidth; in order to improve the speed measurement accuracy and speed resolution, the signal is required to have a large time width. In addition, the signal is required to have a large energy. Therefore, in order to improve the radar's target discovery ability, the signal is required to have a large time width, bandwidth and energy. However, when t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/28
CPCG01S7/28
Inventor 陈勇
Owner ANHUI BOWEI CHANGAN ELECTRONICS
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