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Method and system for processing one-bit SAR echo data

A technology of echo data and processing method, which is applied in the field of signal processing, and can solve problems such as inability to achieve efficient and high-precision echo data processing, and inability to realize simplified calculation and imaging quality.

Active Publication Date: 2019-07-23
SHENZHEN UNIV
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Problems solved by technology

[0009] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method and system for processing one-bit SAR echo data, aiming at solving the problem of inability to realize simplified calculations while ensuring imaging when processing one-bit SAR data in the prior art. quality, can not achieve efficient and high-precision echo data processing defects

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  • Method and system for processing one-bit SAR echo data

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Embodiment Construction

[0050] In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0051] The invention provides a processing method for one-bit SAR echo data, such as figure 1 shown, including steps:

[0052] Step S1. Perform one-bit quantization on the received SAR echo data to obtain a one-bit quantized echo data sequence.

[0053] This step performs sampling processing on the one-bit quantized echo data sequence, and sequentially extracts echo data from the one-bit quantized echo data sequence according to a preset sampling interval. Wherein the preset sampling interval is a natural number greater than 1, preferably, the preset sampling interval can be set to 4 data intervals, thereby simplifying the amount of data contain...

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Abstract

The invention provides a method and a system for processing one-bit SAR echo data. The method comprises the following steps: obtaining one-bit quantization on received SAR echo data to obtain an echosequence subject to one-bit quantization; and respectively performing convolution operation on data values in the echo sequence subject to one-bit quantization and the data values in a matched filtersequence to obtain an SAR echo data sequence subject to convolution operation. The calculated amount and complexity of the convolution operation are reduced, the cost of an SAR system is reduced, theoperation speed and efficiency of the system are improved, and meanwhile the imaging quality of an SAR image subject to matched filtering is ensured, therefore having better instantaneity and higherperformance per watt on data processing.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a method and system for processing one-bit SAR echo data. Background technique [0002] SAR (Synthetic Aperture Radar) imaging has all-day, all-weather, long-range, high-resolution detection capabilities, and plays an important role in many fields such as remote sensing mapping, regional detection, geological exploration, and disaster relief. Research hotspots of scholars at home and abroad. However, with the increase of SAR signal bandwidth, the burden of data acquisition, storage, transmission and processing has gradually increased. On the one hand, the SAR system needs to sample the echo data with high precision to preserve the complete signal characteristics, resulting in an increase in the data processing bit width, which puts forward higher requirements on the hardware performance of the system; on the other hand, the signal sampling rate also requires Increase ...

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Application Information

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IPC IPC(8): G01S13/90
Inventor 黄磊林卓翔赵博潘天伦侯万幸
Owner SHENZHEN UNIV
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