Interference waveform self-adaptation offset method and device for continuous wave detection

An adaptive and interference cancellation technology, applied in the field of continuous wave detection, can solve the problems of not being able to approach signal waveform changes in real time, high hardware requirements, complex implementation, etc., and achieve the effect of convenient implementation, simple system implementation, and interference elimination

Inactive Publication Date: 2014-04-30
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0009] 3) The traditional cancellation technology simply adjusts the amplitude and phase of the transmitted signal and then cancels it with the interference signal, which has low precision and poor adaptability; and most of the current cancellation techniques require multi-channel A/D conversi

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  • Interference waveform self-adaptation offset method and device for continuous wave detection
  • Interference waveform self-adaptation offset method and device for continuous wave detection
  • Interference waveform self-adaptation offset method and device for continuous wave detection

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[0038] Example

[0039] Such as Figure 1a Shown is the system structure diagram of the interference signal active adaptive cancellation method of the present invention. The system includes a transmitting module, a transmitting antenna, a receiving antenna, an interference cancellation module, a receiving processing module, and a digital signal processing module. Such as Figure 1b Shown is the structure diagram of the transmitting module, such as Figure 1c Shown is the structure diagram of the interference cancellation module, such as Figure 1d Shown is the structure diagram of the receiving processing module. The transmitting module is composed of a D / A converter, an up-conversion module, a low-pass filter module, and a power amplifier. The interference cancellation module has a low-pass filter and a subtractor. The receiving processing module includes a down-conversion module, a filter amplifier and an A / D converter. The digital signal processing module is connected with the...

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Abstract

The invention discloses an interference waveform self-adaptation offset method for continuous wave detection. The method comprises the first step of performing initializing; the second step of shielding a target echo signal; the third step of carrying out transmitting, receiving and primary offset; the fourth step of judging whether a detection period includes training time or not, wherein if yes, a detection target echo is shielded, and the fifth step is executed, and if not, the shielding on a detection target is cancelled, and the sixth step is executed; the fifth step of carrying out training, namely, a digital signal processing module trains an interference transfer function according to a sent signal and the echo signal and executes the third step; the sixth step of carrying out secondary offset. The invention further discloses an interference waveform self-adaptation offset device for continuous wave detection. The device comprises a transmitting module, a transmitting antenna, a receiving antenna, an interference offset module, a receiving processing module and the digital signal processing module. The method and device have the advantages of being high in electrical level self-adaptation, good in effect, convenient to achieve, capable of achieving the system easily, stable, reliable and the like.

Description

technical field [0001] The invention relates to a continuous wave detection technology, in particular to a continuous wave detection interference waveform adaptive cancellation method and device. Background technique [0002] With the rapid development of electronic information technology, wireless detection has been widely used in the detection and early warning of various infrastructures such as railway transportation, power equipment, and bridge construction, as well as the quality inspection of industrial products such as aircraft, auto parts, pressure vessels, and oil and gas pipelines. Many industries, such as detection and early warning of biological tissue, play an irreplaceable role in various fields such as national defense construction, national economy, people's life and science and technology. [0003] Continuous wave wireless detection has certain advantages compared with other forms of detection signals. First of all, continuous wave detection has a large pul...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S7/36
CPCG01S7/36G01S7/41
Inventor 韦岗杨萃曹燕
Owner SOUTH CHINA UNIV OF TECH
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