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Nonlinear Frequency Offset Beam Design for FDA-MIMO Radar.

Yanjie Xu¹, Chunyang Wang¹, Guimei Zheng¹

¹College of Air and Missile Defense, Air Force Engineering University, Xi'an 710051, China.

Sensors (Basel, Switzerland)

|February 11, 2023

Summary

This summary is machine-generated.

Frequency diversity array (FDA) radar offers anti-jamming capabilities. This study introduces a novel FDA-MIMO approach to decouple range-angle, creating a stable beam pattern for enhanced radar performance.

Keywords:

Chebyshev window based frequency offset FDA-MIMO radar array structure design nonlinear frequency offset

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Area of Science:

Radar Systems Engineering
Signal Processing
Electromagnetics

Background:

Frequency diversity array (FDA) radar offers a two-dimensional range-angle degree of freedom for target discrimination and anti-jamming.
Conventional linearly frequency-biased FDA radar exhibits range-angle coupling and time-varying beam patterns, limiting performance.
Nonlinear frequency bias has been explored to mitigate coupling and improve beam characteristics.

Purpose of the Study:

To develop a frequency diversity array-multi-input-multi-output (FDA-MIMO) radar scheme.
To achieve a decoupled and time-invariant beam direction map.
To generate a sharp, pencil-shaped main beam pattern with range-angle dependence for improved radar capabilities.

Main Methods:

Implementation of an FDA-MIMO radar architecture.
Application of a nonlinear frequency bias strategy to decouple range and angle.
Utilizing a linear frequency offset scheme weighted by a Chebyshev window to shape the beam pattern.

Main Results:

Successfully obtained a decoupled and time-invariant beam direction map.
Generated a sharp pencil-shaped main sphere beam pattern with distinct range-angle dependence.
Demonstrated effective anti-interference performance through experimental verification.

Conclusions:

The proposed FDA-MIMO scheme effectively decouples range and angle, overcoming limitations of conventional FDA radar.
The developed beamforming technique provides superior beam pattern control and enhanced anti-jamming capabilities.
This research offers a significant advancement in radar anti-jamming technology.