Improved Adaptive Time Delay Estimation Algorithm Based on Fourth-order Cumulants
نویسندگان
چکیده
Time-delay estimation is widely used in sonar and radar applications. In order to estimate time delay accurately in variable signal to noise ratio(SNR), an improved algorithm of adaptive time delay estimation(TDE) based on fourth-order cumulants has been proposed in this paper. The single adaptive filter in the conventional model is separated into two adaptive subunits connected in cascade, one is to track the delay, the other to track the SNR, so as to obtain the accurate signal time delay estimation in the low and variable SNR. The theoretical analysis and simulation results confirm the validity and feasibility of the proposed algorithm.
منابع مشابه
Blind Identification of MA Models using Cumulants
In this paper, many techniques for blind identification of moving average (MA) process are presented. These methods utilize thirdand fourth-order cumulants of the noisy observations of the system output. The system is driven by an independent and identically distributed (i.i.d) non-Gaussian sequence that is not observed. Two nonlinear optimization algorithms, namely the Gradient Descent and the...
متن کاملAn Improved Direction Finding Algorithm Based on Toeplitz Approximation
In this paper, a novel direction of arrival (DOA) estimation algorithm called the Toeplitz fourth order cumulants multiple signal classification method (TFOC-MUSIC) algorithm is proposed through combining a fast MUSIC-like algorithm termed the modified fourth order cumulants MUSIC (MFOC-MUSIC) algorithm and Toeplitz approximation. In the proposed algorithm, the redundant information in the cumu...
متن کاملMultiway Filtering Based on Fourth-Order Cumulants
We propose a new multiway filtering based on fourth-order cumulants for the denoising of noisy data tensor with correlated Gaussian noise. The classical multiway filtering is based on the TUCKALS3 algorithm that computes a lower-rank tensor approximation. The presented method relies on the statistics of the analyzed multicomponent signal. We first recall how the well-known lower-rank-(K1, . . ....
متن کاملDirection-of-Arrival Estimation Based on Khatri-Rao Product and Redundancy Arrays
Difference co-array can be constructed by using Khatri-Rao (KR) product, which can increase the degrees of freedom (DOF) significantly. Combined with fourth order cumulants, the KR product can be used to constructed fourth order difference co-array. The fourth order difference co-array of a four level nested array contains a uniform linear array (ULA), however, its second order difference co-ar...
متن کاملImproved MUSIC Algorithm for DOA Estimation of Coherent Signals via Toeplitz and Fourth-order-cumulants
In this paper we propose an improved MUSIC (Multiple Signal Classification) algorithm applicable for direction of arrival (DOA) estimation of coherent signals in the presence of one-dimensional uniform linear array (ULA), which is based on Toeplitz matrix theory and Fourth-order-cumulants (Foc). In the signal model, a new Toeplitz construction method combining SVD (singular value decomposition)...
متن کامل