scholarly journals An Improved Wideband Covariance Matrix Sparse Representation (W-CMSR) Method for Wideband Direction of Arrival Estimation Using Simulated Annealing

2016 ◽  
Vol 92 ◽  
pp. 317-328
Author(s):  
Sandeep Santosh ◽  
O.P. Sahu
Keyword(s):  
Simulated Annealing ◽  
Sparse Representation ◽  
Covariance Matrix ◽  
Direction Of Arrival ◽  
Direction Of Arrival Estimation

scholarly journals An Enhanced Smoothed L0-Norm Direction of Arrival Estimation Method Using Covariance Matrix

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4403
Author(s):  
Ji Woong Paik ◽  
Joon-Ho Lee ◽  
Wooyoung Hong
Keyword(s):  
Covariance Matrix ◽  
Phased Array ◽  
Null Space ◽  
Estimation Method ◽  
Direction Of Arrival ◽  
Estimation Algorithm ◽  
Doa Estimation ◽  
Direction Of Arrival Estimation ◽  
Improve Performance ◽  
Space Projection

An enhanced smoothed l0-norm algorithm for the passive phased array system, which uses the covariance matrix of the received signal, is proposed in this paper. The SL0 (smoothed l0-norm) algorithm is a fast compressive-sensing-based DOA (direction-of-arrival) estimation algorithm that uses a single snapshot from the received signal. In the conventional SL0 algorithm, there are limitations in the resolution and the DOA estimation performance, since a single sample is used. If multiple snapshots are used, the conventional SL0 algorithm can improve performance in terms of the DOA estimation. In this paper, a covariance-fitting-based SL0 algorithm is proposed to further reduce the number of optimization variables when using multiple snapshots of the received signal. A cost function and a new null-space projection term of the sparse recovery for the proposed scheme are presented. In order to verify the performance of the proposed algorithm, we present the simulation results and the experimental results based on the measured data.

scholarly journals Covariance-Based Direction-of-Arrival Estimation of Wideband Coherent Chirp Signals via Sparse Representation

Sensors ◽  
2013 ◽  
Vol 13 (9) ◽  
pp. 11490-11497 ◽  
Author(s):  
Zhichao Sha ◽  
Zhengmeng Liu ◽  
Zhitao Huang ◽  
Yiyu Zhou
Keyword(s):  
Sparse Representation ◽  
Direction Of Arrival ◽  
Direction Of Arrival Estimation ◽  
Chirp Signals
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