Abstract:

When the traditional algorithms are applied to estimate DOA（Direction of Arrival） of signals with character of cyclostationarit using MIMO（Multiple Input and Multiple Output） radar system,the accuracy is very disappointed and even the algorithms will fail.So cyclic-music algorithm is used to estimate DOA in MIMO radar system.The theory of cyclic statistics is used to calculate the cyclic correlation function between the received signals,to construct correlation matrix of the tectonic cycle,and decompose the singular value.After searching the spectrum peaks,we can obtain the azimuth information.The theoretical deduction and simulation experiments show that for the signals with the characteristics of cyclostationarity,MIMO radar is effective and gets better accuracy by using Cyclic-Music algorithm.

Key words: multiple input and multiple output(MIMO) radar, cyclostationarity, cyclic-music algorithm, estimation of direction of arrival(DOA)