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Updated: Oct 2, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Published on: April 1, 2020

The enhanced beam sweeping algorithm for DOA estimation in the hybrid analog-digital structure with nested array.

Shujun Ye¹, Guanhao Liu¹, Yan Zhou¹

¹School of Information Science and Technology, Northwest University, Xian, 710127, China.

Scientific Reports

|February 23, 2022

Summary

This summary is machine-generated.

This study introduces an enhanced beam sweeping algorithm (EBSA) for millimeter-wave communications. EBSA improves direction of arrival (DOA) estimation accuracy and reduces computational cost in hybrid systems.

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

Area of Science:

Electrical Engineering
Signal Processing
Telecommunications

Background:

Hybrid analog-digital structures are promising for future millimeter-wave communications, offering reduced hardware cost and power consumption.
Accurate spatial covariance matrix (SCM) estimation is crucial for direction of arrival (DOA) estimation in these systems.
Existing beam sweeping algorithms (BSA) for SCM reconstruction are computationally intensive due to high-dimensional matrix operations.

Purpose of the Study:

To address the computational intractability of traditional BSA for DOA estimation in hybrid analog-digital systems.
To propose an enhanced beam sweeping algorithm (EBSA) that improves both accuracy and computational efficiency.
To leverage the benefits of nested arrays for enhanced DOA estimation performance.

Main Methods:

Application of a nested array configuration to the hybrid analog-digital structure.
Development of the enhanced beam sweeping algorithm (EBSA) by identifying and removing redundant elements in the SCM.
Simulation experiments to evaluate the performance of the proposed EBSA.

Main Results:

The proposed EBSA significantly reduces the computational cost associated with SCM reconstruction.
The nested array provides high degrees of freedom, contributing to improved estimation capabilities.
Simulation results demonstrate superior performance of EBSA compared to state-of-the-art methods in terms of estimation accuracy and computational load.

Conclusions:

The enhanced beam sweeping algorithm (EBSA) effectively overcomes the computational limitations of traditional BSA for DOA estimation.
The integration of nested arrays with hybrid structures offers a promising approach for efficient and accurate millimeter-wave communication systems.
EBSA presents a viable solution for practical implementation of advanced DOA estimation techniques in future wireless communication.