A continuous wave detection interference waveform adaptive cancellation method and device

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...

AI Technical Summary

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 conversion, hardware requirements relatively high

This method realizes the estimation of interference level through hardware comparison, which requires multiple A / D and D / A, and the implementation is relatively complicated, and the estimated level cannot approach the signal waveform change in real time

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