出典:Wikipedia
出典:『Wikipedia』 (2011/03/23 17:49 UTC 版)
In mathematics, a Costas array (named after John P. Costas) can be regarded geometrically as a set of n points lying on the squares of a n×n checkerboard, such that each row or column contains only one point, and that all of the n(n − 1)/2 displacement vectors between each pair of dots are distinct. This results in an ideal 'thumbtack' auto-ambiguity function, making the arrays useful in applications such as sonar and radar.