Distance measurement-communication integrated laser radar

Abstract

Disclosed is a distance measurement-communication integrated laser radar. Communication is achieved by utilizing the pseudo random code modulation technology, and distance measurement is performed by utilizing a pseudo random code autocorrelation characteristic, and high-sensitivity reception is achieved by utilizing the single-photon detection technology. The system is composed of a laser light source module, a laser emission optical module, a laser reception optical module, a single-photon detector module and an FPGA (field programmable gate array) signal processing circuit module. The signal processing circuit module generates an emitted modulation communication code, the laser light source module converts the code into amplitude-modulated laser, a reception detector digitalizes a received target photon echo signal into a code sequence, the code sequence is sent back to the signal processing module to perform correlation operation with an original communication code so as to obtain target distance information, and information transmission can be achieved through the emitted communication code at the same time. The system achieves a dual function of the distance measurement and the communication, adopts a technical route of low-power emission and high-sensitivity reception, and achieves low power consumption and miniaturization of the system.

Description

technical field [0001] The invention relates to a laser radar, in particular to a distance measuring and communication integrated laser radar. Background technique [0002] Laser ranging radar has the advantages of high precision, small system size, and rapid measurement. It has a wide range of application backgrounds and involves a wide range of fields. First of all, it has applications such as mine detection, bridge monitoring, and road detection in engineering. It is available in industry. It is widely used in the monitoring of product quality in assembly line production, unmanned driving of automobiles, etc., and also plays a key role in military, aerospace and other fields. Laser communication technology has the advantages of large capacity, strong anti-interference ability, and avoiding multi-path effects near the ground and sea surface. Due to the limitation of space conditions, it is necessary to enable the device to work with multiple tasks, thereby reducing the re...

AI Technical Summary

Problems solved by technology

This integrated technology of distance measurement and communication can only be realized between cooperative targets. When the target is a non-cooperative target, neither the distance measurement function nor the communication function can be realized.

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