Joint optimization method of quadrature wide mainlobe phase-encoded signal and mismatch filter

A phase-encoded signal and mismatch filter technology, applied in the field of radar, can solve the problem of joint design of quadrature wide main lobe phase-encoded signal and mismatch filter, reduce range side lobe level and cross-correlation coefficient, etc. problems, to achieve the effect of reducing the autocorrelation peak side lobe level and peak cross-correlation level, increasing the difficulty and complexity of the structure

Active Publication Date: 2018-09-21
XIDIAN UNIV +1
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Problems solved by technology

However, for a fixed distributed radar system, its signal processing bandwidth is fixed. At this time, it is impossible to reduce the range sidelobe level and the cross-correlation coefficient by simply increasing the symbol length. At present, no orthogonal bandwidth for this problem has been proposed. Joint Design Method of Main Lobe Phase Encoded Signal and Mismatched Filter

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  • Joint optimization method of quadrature wide mainlobe phase-encoded signal and mismatch filter
  • Joint optimization method of quadrature wide mainlobe phase-encoded signal and mismatch filter
  • Joint optimization method of quadrature wide mainlobe phase-encoded signal and mismatch filter

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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] An embodiment of the present invention provides a joint optimization method for quadrature wide main lobe phase-encoded signals and mismatch filters, referring to figure 1 , the method includes the steps of:

[0022] Step 1, determine the number of sub-phase coded signals in the quadrature wide main lobe phase coded signal, and the symbol length of each sub-phase coded signal; determine the length of each sub-mismatched filter in the misma...

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Abstract

The invention belongs to the technical field of radar, and discloses a quadrature wide main lobe phase coded signal and mismatched filter joint optimization method, which can reduce autocorrelation peak side lobe level and peak cross-correlation level after quadrature wide main lobe phase coded signals are subjected to pulse compression through the mismatched filters. The method comprises steps: the number of sub phase coded signals in the quadrature wide main lobe phase coded signals and the symbol length of each sub phase coded signal are determined; the length of each sub mismatched filter in the mismatched filter group is determined, and the main lobe width control quantity after each sub phase coded signal passes through the corresponding sub mismatched filter is determined; according to the quadrature wide main lobe phase coded signals, the mismatched filters and the main lobe width control quantity, an objective function for the quadrature wide main lobe phase coded signals and the mismatched filters is built; and the objective function is solved, and the quadrature wide main lobe phase coded signals after optimization and the mismatched filters after optimization are obtained.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a joint optimization method of an orthogonal wide main lobe phase encoding signal and a mismatch filter, which is used to further reduce the autocorrelation of the orthogonal wide main lobe phase encoding signal passing through a mismatch filter bank Peak sidelobe levels and peak cross-correlation levels. Background technique [0002] MIMO (multiple-input multiple-out) radar is a very promising type of radar. The biggest difference between MIMO radar and phased array radar is that MIMO radar allows different antennas to transmit different signals, while phased array radar can only transmit the same signal. Due to the increased diversity of transmitted signals, MIMO radar can achieve higher spatial resolution and better detection performance. According to the distance between transmitting antennas, MIMO radar is divided into two types, one is centralized MIMO radar and the other ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 刘宏伟周生华徐磊磊王英华纠博
Owner XIDIAN UNIV
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