Name
Title | ||
|---|---|---|
Fast FOCUSS method based on bi-conjugate gradient and its application to space-time clutter spectrum estimation. |
Abstract | ||
|---|---|---|
The focal underdetermined system solver (FOCUSS) is a powerful tool for sparse representation in complex underdetermined systems. This paper presents the fast FOCUSS method based on the bi-conjugate gradient (BICG), termed BICG-FOCUSS, to speed up the convergence rate of the original FOCUSS. BICGFOCUSS was specifically designed to reduce the computational complexity of FOCUSS by solving a complex linear equation using the BICG method according to the rank of the weight matrix in FOCUSS. Experimental results show that BICG-FOCUSS is more efficient in terms of computational time than FOCUSS without losing accuracy. Since FOCUSS is an efficient tool for estimating the space-time clutter spectrum in sparse recoverybased space-time adaptive processing (SR-STAP), we propose BICG-FOCUSS to achieve a fast estimation of the space-time clutter spectrum in mono-static array radar and in the mountaintop system. The high performance of the proposed BICG-FOCUSS in the application is demonstrated with both simulated and real data. |
Year | DOI | Venue |
|---|---|---|
2017 | 10.1007/s11432-015-1016-x | SCIENCE CHINA Information Sciences |
Keywords | Field | DocType |
focal underdetermined system solver (FOCUSS), sparse recovery (SR), bi-conjugate gradient (BICG), space-time adaptive processing (STAP), space-time clutter spectrum | Radar,Conjugate gradient method,Mathematical optimization,Underdetermined system,Clutter,Sparse approximation,Rate of convergence,Solver,Mathematics,Computational complexity theory | Journal |
Volume | Issue | ISSN |
60 | 8 | 1869-1919 |
Citations | PageRank | References |
1 | 0.35 | 20 |
Authors | ||
5 | ||