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Broadband phased array radar echo simulator emission multichannel time-delay compensation method and system

A broadband phased array and radar echo technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as high difficulty and large amount of filter coefficient calculation, and achieve the effect of reducing hardware requirements and high compensation accuracy.

Inactive Publication Date: 2018-05-18
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0009] Furthermore, the variable fractional delay filter based on the Farrow structure can effectively avoid this problem, but the Farrow structure requires a large number of multipliers and adders as the order of the filter increases, and the calculation of the filter coefficients is large and difficult. high

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  • Broadband phased array radar echo simulator emission multichannel time-delay compensation method and system
  • Broadband phased array radar echo simulator emission multichannel time-delay compensation method and system
  • Broadband phased array radar echo simulator emission multichannel time-delay compensation method and system

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Embodiment Construction

[0054] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0055] see figure 1 As shown in the figure, it is a flow chart of the steps of the multi-channel delay compensation method for the broadband phased array radar echo simulator of the present invention.

[0056] In one embodiment, the broadband phased array radar echo simulator launches a multi-channel delay compensation method, such as figure 1 and figure 2 shown, including the following steps:

[0057] (1) Determine the delay of each unit of the radar relative to the reference unit according to the geometric structure of the antenna array, and decompose the delay into integer delay and fractional delay;

[0058] (2) Utilize a variable fractional delay filter obtained based on the Taylor expansion method and carry out time-domain filtering to the broadband signal according to the fractional delay amount, so as to realize the high-precision...

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Abstract

The invention relates to a broadband phased array radar echo simulator emission multichannel time-delay compensation method and system, and belongs to the technical field of electronics. The broadbandphased array radar echo simulator emission multichannel time-delay compensation method and system perform time domain filtering on a broadband signal by means of a variable fraction time-delay filterwhich is obtained based on a Taylor expansion method, realize high precision fraction time-delay, realize high precision integer time-delay through a shift register, and then realize multipath emission channel time-delay compensation of the broadband phased array radar echo simulator. The scheme of the broadband phased array radar echo simulator emission multichannel time-delay compensation method and system can effectively reduce the hardware demand for the system and has high compensation precision, on the basis of the FPGA-based accurate sequential control and quick parallel processing capability, by integrating with the digital signal processing technology, and is specially suitable for time-delay compensation of the variable bandwidth scene.

Description

technical field [0001] The present invention relates to the field of electronic technology, in particular to the field of radar simulation technology, in particular to a multi-channel delay compensation method and system for wideband phased array radar echo simulator emission. Background technique [0002] Phased array radar using broadband signals can obtain very high range resolution and will be widely used in the next generation of multifunctional radar systems. In the process of developing and debugging the broadband phased array radar system and each subsystem, the traditional radar simulator cannot meet the test requirements of wideband digital array radar such as large bandwidth, multi-channel, and multi-working mode, so it is necessary to develop a dedicated broadband digital array radar simulator. Array radar simulator. When the wide-band phased array is used for wide-angle scanning, the beam cannot be effectively formed only by phase control, and precise beam poin...

Claims

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Application Information

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IPC IPC(8): G01S7/28
CPCG01S7/28
Inventor 舒汀詹健
Owner SHANGHAI JIAO TONG UNIV
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