Method of communicating information between an S-mode secondary

Details Method of communicating information between an S-mode secondary Method of communicating information between an S-mode secondary

1994-07-08

1996-01-23

Lobo, Ian J.

Communications: directive radio wave systems and devices (e.g.,

Air traffic control

Secondary surveilance radar

342 37, G01S 1376

Patent

active

054868297

ABSTRACT:
In a method of communicating data between a transmission/reception center and a target, a transaction is constituted by one or more interrogation pulses sent out by the center followed by one or more associated reception windows designed to receive the response from the target that has been sent the associated interrogation pulse. The length of a transaction is the delay between its interrogation pulse and its reception window, the transactions are classified and positioned according to their distances from the radar in decreasing order. The reception window of each transaction is transmitted immediately before the window of the immediately lower-ranking transaction so long as its associated pulse does not overlap an interrogation pulse of a transaction. If the contrary is the case, the transaction is shifted within the previously-transmitted transactions until it no longer overlaps an interrogation pulse or a reception window of these previously-transmitted transactions, the transaction being transmitted after all the previously-transmitted windows if a place without overlapping is not found in this way.

REFERENCES:
patent: 3696415 (1972-10-01), Ballantyne
patent: 3761651 (1988-08-01), Matsunaga
patent: 4710774 (1987-12-01), Gunny
patent: 5081457 (1992-01-01), Motisher et al.
John L. Baker, et al. Mode S System Design And Architecture. Proceedings of the IEEE 77 (1989) Nov., No. 11, New York, US.
Stevens, M. C., "Address Selective Surveillance Radar", Aircraft Engineering, (GB), vol. 52, #4, Apr. 1980.

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