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Optimization design method of LFM-PC composite modulation signal

A LFM-PC, composite modulation technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of lack of other modulation forms research, not involving discrete phase modulation methods, etc., to achieve fast speed, good effect, low normalization side lobe effect

Pending Publication Date: 2021-06-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0003] However, the traditional LFM-PC signal mostly adopts inter-pulse phase code modulation and intra-pulse linear frequency modulation. There is a lack of research on other modulation forms, and the only few studies basically do not involve discrete phase modulation methods.

Method used

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  • Optimization design method of LFM-PC composite modulation signal
  • Optimization design method of LFM-PC composite modulation signal
  • Optimization design method of LFM-PC composite modulation signal

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Embodiment Construction

[0065] The present invention will be described in detail below in conjunction with the embodiments and drawings, but it should be understood that the embodiments and drawings are only used for exemplary description of the present invention, and do not constitute any limitation on the protection scope of the present invention. All reasonable transformations and combinations within the scope of the gist of the present invention fall within the protection scope of the present invention.

[0066] The optimization design of LFM-PC composite modulation signal is carried out through the following process:

[0067] S1 builds the LFM-PC composite modulation signal model.

[0068] It can further include:

[0069] Construct the basic PC signal model as follows:

[0070]

[0071] Among them, u PC (t) represents the complex envelope of the PC signal, t represents the time, n represents the nth pulse, T represents the pulse width, N represents the code length, Indicates the coding s...

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Abstract

The invention discloses an optimization design method of an LFM-PC composite modulation signal. The method comprises the following steps: constructing a discrete model of a fuzzy function of the LFM-PC composite modulation signal; constructing an optimization model based on the discrete model; and solving the optimization model through an ADMM algorithm, wherein the composite modulation signal is obtained through intra-pulse linear frequency modulation and intra-pulse phase coding composite modulation. The optimized LFM-PC signal obtained by the optimization design method of the invention has a lower normalized sidelobe while maintaining wide Doppler tolerance, and has a higher radar detection capability.

Description

technical field [0001] The invention relates to the technical field of an optimization method for an LFM-PC composite modulation signal. Background technique [0002] PC signal is widely used because of its advantages of high resolution and measurement accuracy, but it can only be used in the occasion of narrow Doppler frequency shift, and the form is simple and the anti-interference ability is general. The LFM-PC signal based on the composite modulation of the LFM signal and the PC signal takes into account the advantages of the two signals, has high resolution and measurement accuracy, and at the same time expands the Doppler tolerance of the PC signal, and can also improve the complexity of the signal. degree, thereby improving the anti-jamming capability of the radar system. [0003] However, the traditional LFM-PC signal mostly uses inter-pulse phase code modulation and intra-pulse linear frequency modulation. There is a lack of research on other modulation forms, and ...

Claims

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 张劲东王玉莹赵家琛王娜胡婉婉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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