Multi-pulse combination method for sar imaging and moving target detection
A moving target and combination method technology, applied in the radar field, can solve the problems of SAR imaging and moving target performance limitations, and achieve the effect of meeting the requirements of SAR imaging performance and moving target detection performance
Active Publication Date: 2019-12-20
INST OF ELECTRONICS CHINESE ACAD OF SCI
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When the two modes work in time-sharing, the pulse repetition frequency can be set separately, but when the two modes are required to work at the same time, that is, the SAR / GMTI simultaneous working mode, the repetition frequency needs to be compromised, which will affect the two The performance of both SAR imaging and moving object detection is limited
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[0039] In order to make the objectives, methods and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0040] According to an embodiment of the present invention, a multi-pulse combination method based on simultaneous SAR imaging and moving target detection is provided, such as Image 6 Shown mainly include:
[0041] S1: Divide the transmission pulse of the radar into multiple pulse groups, the multiple pulse groups constitute a cyclic group for cyclic transmission; the multiple pulse groups constitute a cyclic group for cyclic transmission; and each pulse group is coded, where each pulse The widths of the sub-pulses contained in the group are equal, and the receiving window between two adjacent sub-pulses is used as the receiving window. The width of the interface window is an integer multiple of the sub-pulse width and is smaller th...
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The invention provides a multi-pulse combination method for SAR imaging and moving target detection simultaneously which comprises the following steps: dividing multi-pulse into a plurality of pulse groups, wherein the plurality of pulse groups form a cyclic group to be circularly transmitted and coded and the width of sub-pulses contained in each pulse group is equal, two adjacent sub-pulses areused as a receiving window, the width of an interface window is an integer multiple of the width of the sub-pulses and is smaller than the width corresponding to all the sub-pulses contained in each pulse group; receiving an echo signal based on the receiving window; determining an initial decoding position of the cyclic group according to the operation mode, and constructing a grouping integer coefficient matrix of the received echo signal according to the initial decoding position to recover a target signal. According to the multi-pulse combination method for SAR imaging and moving target detection simultaneously, the multi-pulse are combined and circularly transmitted, and each group of sub-pulses are encoded by adopting phase weighting; when receiving and decoding, respectively carrying out signal recovery processing to obtain radar signals suitable for SAR imaging and radar signals suitable for moving target detection.
Description
Technical field [0001] The present invention generally relates to the field of radar technology, in particular to a multi-pulse combination method used for SAR imaging and moving target detection at the same time. Background technique [0002] Radar is a radio remote sensing detection device that acquires target information by transmitting detection signals and receiving reflected signals from the target. In the prior art, the working system of radar can be divided into two working modes: pulse and continuous wave. [0003] In the pulse operation mode, the radar (also called "pulse radar") transmits the detection signal in the form of pulse, and then receives the echo signal of the target. The transmission and reception of the pulse radar are separated in time; in the continuous wave operation mode Next, the radar (also called "continuous wave radar") emits continuous wave detection signals and at the same time receives the echo signal of the target. The continuous wave radar tran...
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IPC IPC(8): G01S13/90G01S7/285
CPCG01S7/285G01S13/90G01S13/9029
Inventor 王岩飞刘畅樊邦奎韩松徐向辉
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI