Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Root-MUSIC-Like Direction Finding Method for Cyclostationary Signals | EURASIP Journal on Applied Signal Processing 2005 1 69-73 2005 Hindawi Publishing Corporation A Root-MUSIC-Like Direction Finding Method for Cyclostationary Signals Pascal Charge LESIA DGEI INSA Toulouse 135 Avenue de Rangueil 31077 Toulouse Cedex4 France Email Yide Wang IREENA SETRA Ecole Polytechnique de l Universite de Nantes La Chantrerie 44306 Nantes France Email Received 4 December 2003 Revised 2 June 2004 We propose a new root-MUSIC-like direction finding algorithm that exploits cyclostationarity in order to improve the direction-of-arrival estimation. The proposed cyclic method is signal selective it allows to increase the resolution power and the noise robustness significantly and it is also able to handle more sources than the number of sensors. Computer simulations are used to show the performance of the algorithm. Keywords and phrases array processing direction finding MUSIC cyclostationary signals. 1. INTRODUCTION The aim of this paper is the estimation of the direction-of-arrival DOA of impinging signals in the telecommunications systems area where almost all signals exhibit the cyclo-stationarity property 1 . The cyclostationarity has been first introduced into array processing by Gardner 2 . We can find in the literature several algorithms see 1 that exploit cy-clostationarity to improve the performances of the conventional methods. Instead of using the correlation matrix as in the conventional methods these algorithms require the estimation of the cyclic correlation matrix that reflects the cy-clostationarity of incoming signals assuming they have baud rates and or are carrier modulated signals as they would be in radar and radio communication applications. Recently an extended cyclic MUSIC algorithm has been proposed in 3 that provides a rather good estimation performance. In 4 an extended root-MUSIC extension of the rootMUSIC 5 algorithm has been proposed in the noncircular source .
