Random Perturbation Beamforming for Signal Strength Optimization
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Solution Overview
Problem
Current beamforming techniques in high-frequency wireless communication systems face challenges in increasing propagation distance and reducing signal attenuation, especially in cellular environments, due to the need for complex channel estimation and increased beam link acquisition time.
Innovation Solution
A method and apparatus that configure beamforming coefficients based on signal strength by adjusting the phase of antennas through random perturbation, eliminating the need for channel information collection and reducing overhead, thereby optimizing beamforming coefficients without channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If traditional beamforming techniques are used to improve signal propagation distance, then beamforming gain is achieved, but channel estimation complexity and beam link acquisition time increase
Solution Approach 1:
The patent extracts only the essential information needed for beamforming (signal strength) while discarding the complex channel estimation process. By measuring only received signal strength rather than full channel state information, the system achieves beamforming without the computational burden of traditional channel estimation, directly resolving the contradiction between propagation distance and complexity
Solution Approach 2:
The patent changes the measurement parameter from complex channel state information to simple signal strength metric. This parameter transformation simplifies the beamforming process while maintaining effectiveness in improving propagation distance, as signal strength alone is sufficient to determine optimal beam direction without requiring full channel characterization
2Reliability
If channel information is collected through traditional methods, then accurate beamforming can be achieved, but beam link acquisition time increases
Solution Approach 1:
The patent applies partial action by collecting only the necessary portion of information (signal strength) rather than complete channel information. This partial measurement approach achieves sufficient beamforming accuracy for reliable communication while dramatically reducing the time required for beam link acquisition, as the system performs only the essential measurement needed for beam direction determination
3Productivity
If high-frequency band is used to increase data rate, then frequency bandwidth is secured, but signal attenuation increases
Solution Approach 1:
The patent implements feedback by continuously measuring received signal strength and using this information to adjust beamforming coefficients in real-time. This feedback mechanism allows the system to compensate for high-frequency signal attenuation by dynamically optimizing beam direction and gain, thereby maintaining data rate performance while mitigating the inherent attenuation problems of high-frequency operation
Data Source
AI summary
A method and apparatus configures a beamforming coefficient based on the signal strength information without collecting channel information by adjusting the phase of the antennas through random perturbation. An antenna control method of a base station in a wireless communication system using a beamforming technique includes measuring nth received signal strength at nth phase of at least one receive antenna, measuring (n+1)th received signal strength at (n+1)th phase shifted randomly from the nth phase in one of forward and backward directions, and configuring a beamforming coefficient with the phase at which the received signal strength is greatest through comparison of received signal strengths. The random perturbation-based beamforming method and apparatus of the present disclosure is capable of configuring the beamforming coefficient appropriate for the normal cellular environment using a plurality analog array antenna without channel estimation overhead.