Direction of Arrival Estimation of OFDM Signals Using Cyclostationarity
Mohammed Alamgir · 2011
Direction of arrival estimation has many applications in communications. Though MUSIC and ESPRIT are by far the mostly studied algorithms, there have been growing interests in cyclostationarity based algorithms for their higher selectivity. In addition to carrier frequency and baud rate, OFDM signals show cyclostationarity caused by the cyclic prefix. In this paper we have studied the direction finding problem of OFDM signal making use of the cyclostationarity property. For this, we have modified the Cyclic MUSIC algorithm and applied it to OFDM signals in a strong interference environment. Results show that the cyclostationarity based Cyclic MUSIC algorithm can outperform the ordinary MUSIC.