Study of effect of raw data compression on azimuth multi-channel SAR system

Zhao Yao, Deng Yunkai, Wang Yu, Li Ning, Wang Wei

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

An effective way to achieve High Resolution and Wide Swath (HRWS) imaging capability is the multi-channel technique in azimuth. Improved resolution and swath can dramatically increase the volume of echo data in the SAR system. However, the onboard data storage and data-transmission bandwidth are limited, so data compression technique is typically used to reduce the volume of echo data. To study the effect of raw data compression on the azimuth multi-channel SAR system, in this paper, we establish a multi-channel SAR signal model based on data compression. We then derive and analyze the effects of data compression on the Signal-to-Noise Ratio (SNR) scaling factor of the multi-channel SAR system and quantization noise. Finally, we verify the validity of the proposed model and analysis results using simulation and real data and discuss the effect of data compression on the Peek-to-Ghost Ratio (PGR). The results of this paper provide an important theoretical basis for the choice of compression method in the multi-channel SAR system.

Original languageEnglish
Pages (from-to)397-407
Number of pages11
JournalJournal of Radars
Volume6
Issue number4
DOIs
Publication statusPublished - 28 Aug 2017
Externally publishedYes

Keywords

  • Block adaptive quantization
  • High Resolution
  • Multi-channel SAR system
  • Signal-to-quantization-noise ratio
  • Wide Swath (HRWS)

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