A Secondary Radar S-mode Selective Inquiry Roll Call Method

Abstract

The invention relates to a selective querying roll-call method of secondary radar S-mode. Roll-call target sorting part in the selective querying roll-call method comprises combining the roll-call targets and link request information into a target request list G1; obtaining a xth target request Mx in the target request list G1, and calculating a transmission time and a response time of the Mx; calculating the times of remaining N-x targets according to the Mx; sorting the remaining N-x targets from large to small according to receiving times; assigning a value of Rx+1 to the receiving time ofa target appeared firstly and being closest to a receiving time Rx, and assigning a value of Tx+1 to the transmission time thereof; after the assignment is completed, automatically increasing 1 to x,and then judging whether condition A: x<N and Tx>0 is met or not; if the condition A is met, continuing to execute; and if the condition A is not met, completing the roll-call target sorting. According to the selective querying roll-call method of the secondary radar S-mode, the sorting is performed on the targets participating in the roll-call; the global optimization is achieved through the local optimization; the method is fast; more querying targets can be efficiently obtained; the querying efficiency and the time utilization rate are improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a secondary radar S mode selection inquiry method for roll call. Background technique [0002] The S mode of the secondary radar is developed on the basis of the traditional A / C mode. The S in the S mode is the first letter of selected, which means selection, that is, it is stipulated that the coded address of any aircraft in the world is unique, and the coded address of the aircraft is added to the radar inquiry signal, and the inquiry is based on each aircraft. The difference of the address of the aircraft is selectively inquired, and the aircraft in the inquiry beam does not reply until the encoded address in the inquiry pulse is identical to its own address. [0003] The S-mode secondary surveillance radar system communicates with the aircraft through roll call, and controls the inquiry so that the aircraft's response signals do not overlap. Compared with the conventional mode of s...

AI Technical Summary

Problems solved by technology

The disadvantage of this is that many targets that are not within the coverage of the antenna also participate in the roll call, which increases the burden of the roll call and causes unnecessary overhead for the system; the sorting takes a long time for the system to run, and the number of targets that can be sorted within the selective call inquiry cycle Rarely, does not meet the system index requirements

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