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A Novel Approach for Direction of Arrival Estimation in Co-Located MIMO Radars by Exploiting Extended Array Manifold

Sadiq Akbar1, Muhammad Sohail2, Fawad Zaman3

  • 1Department of Mechanical Engineering, Chulalongkorn University, Bangkok 10330, Thailand.

Sensors (Basel, Switzerland)
|March 11, 2023
PubMed
Summary

This study introduces flower pollination optimization for Multiple-Input Multiple-Output (MIMO) radar direction-of-arrival estimation. The novel method enhances accuracy and outperforms existing algorithms.

Keywords:
MIMO systemsco-located radardirection of arrival estimationflower pollination algorithm

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Radar Systems

Background:

  • Traditional radar systems have limitations in estimation accuracy and resolution.
  • Multiple-Input Multiple-Output (MIMO) radars offer significant improvements, attracting research interest.
  • Accurate direction-of-arrival (DOA) estimation is crucial for radar applications.

Purpose of the Study:

  • To propose a novel and efficient method for DOA estimation in co-located MIMO radar systems.
  • To introduce the flower pollination optimization algorithm for solving complex DOA estimation problems.
  • To enhance the performance of MIMO radar systems through improved DOA estimation.

Main Methods:

  • Received data is processed using a matched filter to improve the signal-to-noise ratio.
  • A novel flower pollination optimization algorithm is employed for DOA estimation.
  • The fitness function is optimized using virtual or extended array manifold vectors.

Main Results:

  • The proposed flower pollination approach demonstrates superior performance compared to existing algorithms.
  • Statistical tools including RMSE, CDF, histograms, and box plots validate the effectiveness of the method.
  • The algorithm effectively estimates the direction of arrival for targets in MIMO radar systems.

Conclusions:

  • Flower pollination optimization is a simple, implementable, and effective method for DOA estimation in MIMO radars.
  • The proposed approach offers enhanced accuracy and resolution for radar systems.
  • This work contributes a valuable optimization technique for advanced radar signal processing.