Apparatus and method for frequency space modeling
First Claim
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1. A method for simulating the operation of interrogators, transponders and receivers, comprising the steps of:
- (a) specifying the number of reply signal(s) per transponder;
(b) setting the number of transponders to zero;
(c) incrementing the number of transponders by a fixed amount;
(d) defining the positions of the interrogators and the transponders;
(e) determining the number of transponder replies over a predetermined interval;
(f) determining whether the correct number of reply signals per interrogator has been found in step (e);
(g) using a sliding window for determining probability in the following steps;
(h) determining the probability of interference between one type of transponder reply signal and a regularly repeated transponder signal;
(i) determining the number of a second type of transponder reply signal over the predetermined interval;
(j) determining the probability of interference between the second type of transponder reply signal and the regularly repeated signal; and
(k) from the results of steps (h) and (j) determining the overall probability of interference with the regularly repeated signal.
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Abstract
This is a computer-implemented model for the frequency space utilized by the Mode Select Beacon System (the Mode S system) for air traffic surveillance and control. The model simulates the operation of interrogators, transponders, and receivers, and calculates the probability of interference between transponder reply signals using a sliding window.
12 Citations
4 Claims
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1. A method for simulating the operation of interrogators, transponders and receivers, comprising the steps of:
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(a) specifying the number of reply signal(s) per transponder; (b) setting the number of transponders to zero; (c) incrementing the number of transponders by a fixed amount; (d) defining the positions of the interrogators and the transponders; (e) determining the number of transponder replies over a predetermined interval; (f) determining whether the correct number of reply signals per interrogator has been found in step (e); (g) using a sliding window for determining probability in the following steps; (h) determining the probability of interference between one type of transponder reply signal and a regularly repeated transponder signal; (i) determining the number of a second type of transponder reply signal over the predetermined interval; (j) determining the probability of interference between the second type of transponder reply signal and the regularly repeated signal; and (k) from the results of steps (h) and (j) determining the overall probability of interference with the regularly repeated signal. - View Dependent Claims (2)
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3. An apparatus for simulating the operation of interrogators, transponders and receivers, comprising:
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(a) means for specifying the number of reply signal(s) per transponder; (b) means for setting the number of transponders to zero; (c) means for incrementing the number of transponders by a fixed amount; (d) means for defining the positions of the interrogators and the transponders; (e) means for determining the number of transponder replies over a predetermined interval; (f) means for determining whether the correct number of reply signals per interrogator has been found in step (e); and (g) sliding window means for determining the probability of interference between transponder reply signals, comprising; (1) means for determining the probability of interference between one type of transponder reply signal and a regularly repeated transponder signal; (2) means for determining the number of a second type of transponder reply signal over the predetermined interval; and (3) means for determining the probability of interference between the second type of signal of means (2) and the regularly repeated signal of means (1). - View Dependent Claims (4)
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Specification