Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quadrature compressive sampling SAR imaging   This paper presents a quadrature compressive sampling (QuadCS) and associated
fast imaging scheme for synthetic aperture radar (SAR). Different from other
analog-to-information conversions (AIC), QuadCS AICs using independent
spreading signals sample the SAR echoes due to different transmitted pulses.
Then the resulting sensing matrix has lower correlation between any two columns
than that by a fixed spreading signal, and better SAR image can be
reconstructed. With proper setting of the spreading signals in QuadCS, the
sensing matrix has the structures suitable for fast computation of
matrix-vector multiplication operations, which leads to the fast image
reconstruction. The performance of the proposed scheme is assessed using real
SAR image. The reconstructed SAR images with only one-fourth of the Nyquist
data achieve the image quality similar to that of the classical SAR images with
Nyquist samples.

27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat