Adaptive Beamforming Phased Array Antenna for Wireless Interference Avoidance
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Solution Overview
Problem
Current wireless communication systems face challenges in maintaining secure and efficient transmission of high-definition content over unlicensed millimeter-wave frequencies, particularly in adapting beamforming to avoid interference and ensure content protection.
Innovation Solution
The implementation of a method using a digitally controlled phased array antenna that adapts its beam based on antenna location information and performance data, with a separate wireless communication channel for transmitting antenna and content protection information to steer the beam and maintain secure content transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used to transmit content over unlicensed millimeter-wave frequencies, then transmission capacity and signal quality are improved, but interference from obstacles and other transmitters increases
Solution Approach 1:
The beamforming system dynamically adjusts beam direction and characteristics based on real-time feedback about obstacles and interference. The transmitter continuously adapts the beamforming weights and steering vectors to optimize signal quality while avoiding harmful interference from or to other transmitters in the unlicensed spectrum environment.
Solution Approach 2:
The system implements feedback mechanisms where the receiver provides information about channel conditions, obstacle detection, and interference levels back to the transmitter. This feedback enables the transmitter to adjust beamforming parameters to maintain reliable transmission while avoiding harmful effects in the shared unlicensed spectrum.
2Productivity
If adaptive beamforming with feedback is implemented, then transmission capacity is maximized, but system complexity and computational requirements increase
Solution Approach 1:
The beamforming computation is segmented into separate functions: the transmitter performs channel estimation and initial beamforming weight calculation, while the receiver performs channel feedback and refinement. This segmentation distributes computational complexity across multiple devices rather than concentrating it all in one location, making the overall system more manageable.
Solution Approach 2:
The system uses predetermined weight vectors and classification into sets as approximations rather than computing optimal beamforming weights from scratch for every transmission. This partial action approach reduces computational complexity while still achieving high transmission capacity by focusing computations only on the most critical parameters.
3Reliability
If content protection encryption is applied, then security against copying is improved, but processing time and computational overhead increase
Solution Approach 1:
Content protection encryption and authentication are performed in advance before the actual content transmission begins. The HDCP protocol establishes encrypted communication channels and validates device licenses beforehand, so that during the content streaming phase, the encryption/decryption operations are already established and do not add continuous processing delays.
Data Source
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AI summary
A method and apparatus is disclosed herein for wireless communication with adaptive beamforming. In one embodiment, the apparatus comprises a processor, a radio frequency (RF) transmitter having a digitally controlled phased array antenna coupled to and controlled by the processor to transmit content using adaptive beamforming, and an interface to a wireless communication channel coupled to the processor to communicate antenna information relating to the use of the phased array antenna and to communicate information to facilitate playing the content at another location.