Reconfigurable Multiple-Antenna System for Unicast and SFN Beam Patterns
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Solution Overview
Problem
Current antenna systems in cellular wireless networks lack the ability to be reconfigurable and adjustable to meet the diverse requirements of different transmission modes, such as unicast and broadcast, which affects network performance.
Innovation Solution
A multiple-antenna system that includes a signal distribution network embedded in a base station transmitter, allowing for control and reconfiguration of antenna radiation patterns through gain settings and switch configurations to produce specific beam patterns for various applications, enabling seamless transitions between transmission modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed antenna system is used, then the device complexity is reduced, but the adaptability to different transmission modes deteriorates
Solution Approach 1:
The patent implements dynamic reconfigurability in the antenna system by using electronically controllable switches and variable gain amplifiers that can change the radiation pattern and beam direction in real-time based on transmission mode requirements, allowing the system to adapt between unicast, broadcast, and other modes without physical reconfiguration
Solution Approach 2:
The patent creates a universal antenna system that can perform multiple transmission functions (unicast, broadcast, sector-specific transmissions) through a single reconfigurable antenna array, eliminating the need for separate fixed antenna systems for each transmission mode by using controlled signal distribution and beamforming techniques
2Adaptability or versatility
If the antenna system is made reconfigurable with signal distribution networks, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The patent segments the antenna system into multiple independently controllable antenna elements or sub-arrays, each capable of being individually configured through the signal distribution network, allowing complex radiation patterns to be constructed from simpler modular components that can be controlled separately
Solution Approach 2:
The patent achieves reconfigurability by changing electrical parameters (gain, phase, amplitude) of signals distributed to different antenna elements through electronically controlled components, allowing the radiation pattern to be dynamically adjusted by modifying signal parameters rather than physical antenna structure
Data Source
AI summary
A reception method and apparatus for use in a multi-cell orthogonal frequency division multiple access (OFDMA) wireless system. In a unicast receive mode during a first receive time period, a first group of orthogonal frequency division multiplexing (OFDM) symbols is received by a mobile device from multiple of a plurality of antennas at a serving base station. In a single-frequency-network (SFN) receive mode during a second receive time period, a second group of OFDM symbols is received by the mobile device from one of a plurality of antennas at the serving base station. The transition between the first receive time period and the second receive time period occurs during a cyclic prefix or a cyclic postfix between OFDM symbols, and the plurality of antennas produce a first beam pattern during the unicast receive mode and a second beam pattern during the SFN receive mode.