Topics in Synthetic Aperture Radar and Sparse Filter Design,

1995 ◽  
Author(s):  
Jennifer L. Webb
Keyword(s):  
Synthetic Aperture Radar ◽  
Filter Design ◽  
Synthetic Aperture ◽  
Sparse Filter Design ◽  
Aperture Radar

scholarly journals Optimization Design of Non-Integer Decimation Filter for Compressing Satellite Synthetic Aperture Radar On-board Data

2021 ◽  
Vol 24 (5) ◽  
pp. 475-481
Author(s):  
Tae-Woong Kang ◽  
Hyon-Ik Lee ◽  
Young-Bok Lee
Keyword(s):  
Synthetic Aperture Radar ◽  
Optimization Design ◽  
Resource Constraints ◽  
Filter Design ◽  
Finite Impulse Response ◽  
Transmission Efficiency ◽  
Operating Conditions ◽  
Synthetic Aperture ◽  
Decimation Filter ◽  
Aperture Radar

The on-board processor of satellite Synthetic Aperture Radar(SAR) digitizes the back-scattered echoes and transmits them to the ground. As satellite SAR image of various operating conditions including broadband and high resolution is required, an enormous amount of SAR data is generated. Decimation filter is used for data compression to improve the transmission efficiency of these data. Decimation filter is implemented with the FIR(Finite Impulse Response) filter and here, the decimation ratio and tap length are constrained by resource requirements of FPGA used for implementation. This paper suggests to use a non-integer ratio decimation filter in order to optimize the data transmission efficiency. Also, it proposes a filter design method that remarkably reduces the resource constraints of the FPGA in-use via applying a polyphase filter structure. The required resources for implementing the proposed filter is analysed in this paper.

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