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In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
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Related Experiment Video

Updated: Sep 29, 2025

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Analog-Domain Suppression of Strong Interference Using Hybrid Antenna Array.

Kai Wu1, J Andrew Zhang1, Xiaojing Huang1

  • 1Global Big Data Technology Centre (GBDTC), University of Technology Sydney (UTS), Sydney, NSW 2007, Australia.

Sensors (Basel, Switzerland)
|March 26, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a versatile interference suppression technique for wireless systems using hybrid analog arrays. The method effectively steers nulls towards interference, significantly reducing signal disruption without needing coordination.

Keywords:
angle-of-arrival (AoA) estimationbeamformingconstant-modulus phase shifterhybrid antenna arrayinterference suppressionnull steering

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Wireless Communications

Background:

  • Increasing wireless applications and cell densification exacerbate radio frequency interference.
  • Existing interference mitigation methods are often problem-specific and require system cooperation.

Purpose of the Study:

  • To develop a versatile and effective solution for counteracting severe interference in wireless systems.
  • To reduce the power consumption and quantization requirements of analog-to-digital converters.

Main Methods:

  • Utilizing a hybrid array of analog subarrays for interference suppression in the analog domain.
  • Designing a real-time algorithm employing constant-modulus phase shifters to steer nulls towards interference.
  • Developing a two-stage method for accurate estimation of interference directions.

Main Results:

  • Achieved over 65 dB of suppression for three spatially resolvable interference signals with random directions.
  • Demonstrated applicability to most wireless systems without requiring training signals or inter-system coordination.

Conclusions:

  • The proposed analog domain interference suppression technique offers a versatile and efficient solution.
  • Significant interference reduction is achievable with reduced analog-to-digital converter complexity and power consumption.