Radar signal processor for perimeter defense

Abstract

The invention discloses a radar signal processor for perimeter defense. The radar signal processor comprises a main processor, an external instruction memory, an external data memory, an operational amplifier and a data transmission chip, and the external instruction memory, the external data memory, the operational amplifier and the data transmission chip are each connected with the main processor. According to the invention, the radar signal processor employs two-dimensional FFT processing, and the main processor has dual cores and is high in operation efficiency, so the fault detection function on the radio frequency front end is added, and a clock of the signal processor is provided by the radio frequency front end.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a radar signal processor for perimeter defense. Background technique [0002] Radar signal processing is the core part of the radar system. Its main functions are: to provide timing for the whole machine, control the waveform required for the RF front-end transmission; sample the radar echo signal, and output the processing result to the host computer. In the existing low-cost miniaturized radar signal processor, there are mainly the following defects: [0003] 1. RF front-end faults are difficult to detect [0004] The existing low-cost miniaturized signal processor transmits instructions to the RF front-end through the SPI interface to control the high-frequency signals required for the RF front-end to transmit. It is impossible to know, and it is necessary to use a spectrum analyzer to test whether the RF front-end has 24G high-frequency signal output, which ...

AI Technical Summary

Problems solved by technology

[0003] 1. RF front-end faults are difficult to detect

[0004] The existing low-cost miniaturized signal processor transmits instructions to the RF front-end through the SPI interface to control the high-frequency signals required for the RF front-end to transmit. Unable to know, you need to use a spectrum analyzer to test whether the RF front-end has 24G high-frequency signal output, which is troublesome for the testing process

[0005] 2. Stationary targets cannot be detected

[0006] The existing low-cost miniaturized signal processor only has one-dimensional velocity resolution, and the distance is calculated by relying on the frequency difference and phase difference of different frequency signals. For stationary targets all at zero frequency, mixed with ground clutter, there is no suitable The method of removing clutter cannot effectively extract the stationary target information from the ground clutter. If the ground clutter is filtered out, the stationary target will also be filtered out, so it is difficult to detect the stationary target

[0007] 3. The noise caused by the crystal oscillator chip is too large

[0008] Due to the synchronization of the radar machine, the clock of the RF front-end is drawn from the crystal oscillator chip in the signal processor through the internal bus, which can ensure the synchronization of the entire system. Interference, the starting point of the radar is interfered, when the signal is transmitted to the signal processor, the noise will become larger, it is difficult to detect the target with low intensity or the weak signal at a long distance

[0009] 4. Long running time

The main frequency of the original signal processor is 150M, and the main frequency of the current signal processor is 200M, and the running speed is 30% slower than the current one.

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