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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

Beamforming Based Full-Duplex for Millimeter-Wave Communication.

Xiao Liu^1,2,3, Zhenyu Xiao^4,5,6, Lin Bai^7,8,9

¹School of Electronic and Information Engineering, Beihang University, Beijing 100191, China. eeliuxiao@buaa.edu.cn.

Sensors (Basel, Switzerland)

|July 26, 2016

Summary

This summary is machine-generated.

This study presents new beamforming methods for full-duplex (FD) millimeter-wave (mmWave) systems to boost data rates by reducing self-interference (SI). Proposed iterative and closed-form solutions offer efficient performance with varying robustness to system parameters.

Keywords:

beamforming full duplex millimeter-wave mmWave self-interference cancellation

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Area of Science:

Electrical Engineering
Wireless Communications
Signal Processing

Background:

Full-duplex (FD) systems enable simultaneous data transmission and reception, significantly enhancing spectral efficiency.
Millimeter-wave (mmWave) frequencies offer vast bandwidth but face challenges like self-interference (SI) and propagation loss.
Beamforming is crucial for directing signals and mitigating interference in mmWave FD systems.

Purpose of the Study:

To develop and analyze beamforming techniques for FD mmWave systems.
To maximize achievable data rates by effectively mitigating SI.
To propose low-complexity and closed-form solutions for practical implementation.

Main Methods:

Formulation of a joint transmission and reception (Tx/Rx) beamforming problem to maximize the achievable rate.
Development of a low-complexity iterative algorithm to maximize signal power while suppressing SI.
Derivation of two closed-form solutions using Minimum Mean Square Error (MMSE), Zero-Forcing (ZF), and Maximum Ratio Transmission (MRT) criteria.

Main Results:

The proposed iterative scheme converges rapidly (average of two iterations) and achieves near-optimal performance.
Closed-form solutions provide appealing performance, with variations from the upper bound influenced by channel conditions.
The iterative and closed-form schemes exhibit distinct robustness characteristics concerning antenna array geometry and channel estimation errors.

Conclusions:

The developed beamforming strategies effectively address SI in mmWave FD systems.
Iterative and closed-form solutions offer practical trade-offs between complexity, performance, and robustness.
Further research can explore optimizing these schemes under diverse and challenging mmWave channel conditions.