Phased array digital multi-beam forming machine for electron reconnaissance

Abstract

The invention discloses a phased array digital multi-beam generator for electronic reconnaissance, for the high resolution direction measurement having strong and weak signals or coherent multi signals, and forming the multi-target signal into anti-interference digital multi-beam to form a multi-beam process: first, in a data acquisition pretreatment board, an AD samples intermediate frequency analogue real signals output by each array antenna receiver, a DPS and a FPGA chip are cooperated to complete quadrate sampling and amplitude phase error correction; the intermediate frequency analogue actual signals are converted into a baseband digital complex signal and the amplitude phase error between the multi channels is corrected; a LVDS channel transmits the baseband digital complex signal to a signal processing board, the DPS completes the high resolution direction measurement having strong and weak signals or coherent multi signals and calculates the weight value group formed by the adaptive beam; the weight value group is added into the wave beam in the signal processing board FPGA to form a network; completing forming anti-interference digital multi-beam of the multi-target signal; an up frequency converter converts the output of the anti-interference digital multi-beam into needed intermediate frequency analogue signal.

Description

technical field [0001] The invention relates to the technical field of electronic reconnaissance, in particular to a phased array digital multi-beam former for electronic reconnaissance, which can be used for precise direction finding and anti-interference beam formation of multiple narrowband targets in electronic reconnaissance. Background technique [0002] In modern warfare, electronic reconnaissance plays an extremely important role, and has become an important means of obtaining tactical intelligence in modern high-tech warfare. In order to effectively obtain target information in a complex electromagnetic environment, foreign countries are vigorously developing new phased array antenna technologies, such as the U.S. directional phased array antenna and conformal phased array antenna; Controlled array antenna; Sweden is developing the "similar balance technology" double-sided phased array antenna, etc. Since digital beamforming technology is commonly used in phased ar...

AI Technical Summary

Problems solved by technology

[0005] 1) When there are strong and weak signals in the target, the weak signals will be submerged;

[0006] 2) When there are coherent signals and partially correlated signals in the target, the traditional direction finding algorithm is no longer effective;

[0007] 3) Multi-channel hardware implementation faces problems such as huge data throughput, data synchronization, and real-time performance of algorithm implementation

[0008] These problems are the big problems for phased array receivers in electronic reconnaissance to realize accurate detection of multi-narrowband targets

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