A New Method for SSR Signal Discrimination from Garbled Replies
1990 Volume 1990 Issue 66 Pages 51-60
Details
1990 Volume 1990 Issue 66 Pages 51-60
A new method was developed to obtain garble free SSR information on aircraft identification and altitude by discriminating SSR signal from many of garbled replies.
In this new method, two replies received from different locations at the same time are necessary for discriminating garbled replies. And the positions of aircraft can be measured by using a hyperbolic navigation method. Based on this idea, a computer simulation was carried out under the several garbled conditions.
The rate of degarbled signal for one airraft, two aircraft and three aircraft, under the condition that three replies are garbled, are 97%, 74% and 34%, respectively. And the estimated error on the base line of the hyperbolic navigation method is less than 10m for about 90% of aircraft whose reply was discriminated.
