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Adaptive Beamforming Applied to OFDM Systems.

Tiago F B de Sousa1, Dalton S Arantes2, Marcelo A C Fernandes3

  • 1Department of Computer Engineering and Automation, Federal University of Rio Grande do Norte⁻UFRN, Natal RN 59.078-970, Brazil. tiagoair@gmail.com.

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Summary
This summary is machine-generated.

This study introduces an adaptive beamforming method for Orthogonal Frequency-Division Multiplexing (OFDM) systems. The technique enhances system performance and capacity by reducing the guard interval, improving robustness.

Keywords:
Least Mean Squares (LMS)OFDMadaptive beamformingguard time

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Telecommunications

Background:

  • Orthogonal Frequency-Division Multiplexing (OFDM) systems are widely used in modern wireless communication.
  • Improving the performance and capacity of OFDM systems remains a key research area.
  • Existing adaptive beamforming techniques can be complex or require dedicated pilot signals.

Purpose of the Study:

  • To propose a novel adaptive beamforming scheme for time-domain, pre-FFT OFDM systems.
  • To enhance the performance and transmission capacity of OFDM systems.
  • To present a simplified approach for adaptive beamforming using existing system resources.

Main Methods:

  • An adaptive beamforming scheme is applied to time-domain, pre-FFT OFDM systems.
  • A supervised adaptive algorithm utilizes frequency domain multiplexed pilots as reference signals.
  • The proposed structure and reference signal acquisition method are detailed.

Main Results:

  • The proposed scheme significantly reduces the guard interval in OFDM systems.
  • Performance curves demonstrate improved system robustness and increased transmission capacity.
  • The method offers a simpler alternative to existing adaptive beamforming techniques.

Conclusions:

  • The adaptive beamforming scheme effectively enhances OFDM system performance and capacity.
  • The utilization of frequency domain multiplexed pilots simplifies the adaptive beamforming process.
  • The reduction in guard interval leads to more robust and higher-capacity communication systems.