Doppler frequency shift simulation method and device based on general medium frequency transceiver

Abstract

The invention discloses a doppler frequency shift simulation method and device based on a general medium frequency transceiver. The method comprises the steps that A, an audio generation collector acquires a radar mode; B, frequency shift amount is calculated through preset speed and the radar mode; C, the reference frequency of a doppler radar is received and filtering is carried out after down conversion; D, up conversion is carried out on a filtered signal, so as to generate a signal after frequency shift; and E, the signal is sent to the doppler radar and is compared with a reference signal. According to the invention, based on the medium frequency transceiver in the existing general PXI modular instrument, the total frequency shift amount is calculated through the acquired radar mode and the preset speed; up and down conversion and digital filtering are carried out on the signal to simulate doppler frequency shift; a high requirement on a special hardware circuit in the traditional technology is solved; the precision and the portability are improved; the repair time and the cost are reduced; and the doppler frequency shift simulation method and device based on the general medium frequency transceiver can be widely applied to the technical field of aviation.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to a Doppler frequency shift simulation method and device based on a general-purpose intermediate frequency transceiver. Background technique [0002] The development of aviation technology requires the maintenance of airborne equipment to keep up with the pace. Most of the traditional Doppler frequency shift test equipment is realized by single sideband modulation. The Doppler frequency shift test equipment realized by this method requires the design of special hardware circuits, high requirements for filters, low frequency accuracy, poor software portability, and the hardware and software are not easy to upgrade. [0003] Existing traditional Doppler frequency shift simulators use single sideband modulation to realize frequency shift, which are mostly implemented in hardware and have high requirements for filters. This software has poor portability and is not easy to upgrade. On...

AI Technical Summary

Problems solved by technology

The Doppler frequency shift test equipment realized by this method requires the design of special hardware circuits, high requirements for filters, low frequency accuracy, poor software portability, and hardware and software are not easy to upgrade

[0003] Existing traditional Doppler frequency shift simulators use single sideband modulation to realize frequency shift, which are mostly implemented in hardware and have high requirements for filters. This software has poor portability and is not easy to upgrade. Once a fault occurs, the entire The hardware circuit board is repaired, the repair cycle is long, and normal work cannot be restored in a short time

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