Abstract :
This paper is concerned with introducing a direction of arrival estimation (DOA) estimation
algorithm that is independent of the bandwidth of the intercepted signals. The proposed
algorithm offers a modification to most subspace based DOA estimation algorithms that
depend basically on narrowband signals assumption. The basic idea of this modification is the
replacement of conventional correlation matrix by a cyclic one. This modification enables the
proposed algorithm to deal with both narrowband and wideband signals. In addition, this
algorithm requires only that the interference signals are cyclically uncorrelated with SOI. This
condition is easier to be achieved than uncorrelation condition that is required by
conventional algorithms. Computer simulations using an additive white Gaussian noise
(AWGN) channel show that the proposed DOA estimation algorithm succeeds to estimate
DOAs of the SOI and interference signals at 10 dB signal to noise ratio and -3 dB signal to
interference ratio.