英语翻译Assume that someone brings you a signal processing syste
英语翻译
Assume that someone brings you a signal processing system enclosed in a black box.The box has two connectors,one marked input and the other output.Other than these labels there are no identifying marks or documentation,and nothing else is known about what is hidden inside.What can you learn about such a system?Is these some set of measurements and calculations that will enable you to accurately predict the system’s output when an arbitrary input is applied?This ask is known as system identification.
You can consider system identification(系统辨识) as a kind of game between yourself and an opponent.The game is played in the following manner.Your opponent brings you the black box (which may have been specifically fabricated(制作,构成) for the purpose of the game).You are given a specified finite amount of time to experiment with the system.Next your opponent specifies a test input and ask you for your prediction -- were this signal to be applied what output would result?The test input is now applied and your prediction put to the test.