S-mode secondary radar roll-call inquiry method

Abstract

The invention discloses an S-mode secondary radar roll-call inquiry method, which comprises the following steps of: determining response messages according to the types of inquiry messages, and when one inquiry message corresponds to one response message, setting the same pre-protection time before each response message and setting the same post-protection time after each response message; setting inquiry protection time in the duty cycle of the inquiry transmitter; and finally, designing large-capacity and high-efficiency inquiry and response according to the closely arranged response messages and inquiry protection time. According to the invention, roll-call inquiry can be carried out within limited selective calling time, so that inquiry to the maximum extent is realized, non-overlapping and non-crosstalk of response signals are also realized, waiting and extra waste of the selective calling time can be effectively reduced, and inquiry and response efficiency of the system is improved.

Description

technical field [0001] The invention relates to the technical field of secondary radar, in particular to a roll call inquiry method of S mode secondary radar. Background technique [0002] With the development of the air transport industry, the number of aircraft, flight flow, flight density, and ground radar stations increase. The traditional AC mode secondary radar can no longer meet the needs of flight safety and traffic control. The S mode secondary radar has a unique The 24-bit aircraft address can effectively reduce asynchronous interference through address correlation. Through the monitoring function, information such as aircraft flight number, airspeed, ground speed, and heading can be obtained; and it supports roll call inquiry, which is greatly improved compared with traditional all-call Reduce the number of responses, effectively reducing system saturation, signal aliasing, code interleaving, synchronization crosstalk and other problems caused by too many response...

AI Technical Summary

Problems solved by technology

[0006] 2. The maximum number of inquiries will inevitably bring the largest number of responses. How to calculate the required time for inquiries and responses, and design a reasonable time allocation for query transmission and response reception, so that the response signals have no overlap and crosstalk, and can be effectively used by the interrogator Receiving and decoding correctly is the second difficulty;

[0007] 3. Maximum interrogation will lead to long-term work of the interrogator’s transmitting equipment. How to combine the requirements of the system’s transmission duty cycle to ensure the safety of the interrogating and transmitting equipment to achieve the maximum interrogation is the third difficulty.

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