Broadband signal synthesizing method based on multi-sending and multi-receiving frequency division radar

Abstract

The present invention provides a wideband signal synthesizing method based on multi transmitting and multi receiving frequency-division radar, which comprises the following steps: 1) synchronously transmitting M subband signals from M transmitting array elements of transmitting array at the transmitting side of multi transmitting and multi receiving radar; 2) receiving echo signal by N receiving array elements in the receiving array at the receiving end of multi transmitting and multi receiving radar, and obtaining N*M path of receiving signals corresponding to different frequency bands and different array elements as each receiving array element is set with M receiving channels; and 3) executing beam forming processing and matched filtering processing, obtaining M narrow-band signals, adding the frequency spectrum of M narrow-band signals for obtaining the synthesized wideband signal, wherein the final wideband signal is obtained through multiplexing the wideband signal with the reciprocal frequency spectrum window. The invention effectively overcomes the problem that side-lobe generates when a plurality of narrow bands synthesize a broadband signal. Therefore a plurality of narrow-band receiving and transmitting channels can be used for realizing high-resolution distance image according to the invention thereby greatly reducing the requirement of imaging radar to the capability of broadband device.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for better performance over wider ranges than current methods such as SAR/Inverse Scene Radars due to its ability to combine signals from different sources without affecting each other's reception capabilities. It also improves spectral efficiency compared to traditional techniques like spaceborne waveforms while maintaining good quality images captured under specific conditions.

Problems solved by technology

Technological Problem addressed in this patented text relates to achieving both high definition imagery capabilities without increasing complexity and cost associated with traditional systems such as radio astronomy and sonars. Current methods require expensive equipment like large antenna arrays and complex algorithms requiring long data transfer times. Therefore, there has been an effort towards developing more efficient ways to generate wider ranges of millimeter waves through advanced techniques called multifunctional communication receivers.

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