Intelligent Antenna Selection for MIMO Power Efficiency
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Solution Overview
Problem
In Multiple-Input-Multiple-Output (MIMO) systems, conventional antenna diversity methods fail to effectively utilize multiple power amplifiers when significant signal loss occurs in one signal path, leading to wasted output power due to inefficient transmission.
Innovation Solution
An intelligent transmission antenna selection method that dynamically chooses the optimal antenna based on calculated short-term signal qualities and channel characteristics, using a processor to estimate channel characteristics, determine an antenna switching period, and generate an antenna selection signal to direct uplink signals to the best available antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If antenna diversity is used to increase signal power, then transmission power is improved, but power wastage increases when signal loss occurs in one path
Solution Approach 1:
The patent implements dynamic antenna selection by continuously monitoring downlink signal qualities from multiple antennas and switching to the antenna with the best signal quality for uplink transmission. This dynamic adaptation prevents power wastage by ensuring the system always uses the most reliable antenna path, resolving the contradiction between maintaining high signal power and avoiding power wastage when signal loss occurs in one path.
Solution Approach 2:
The patent employs feedback mechanisms where the base station monitors downlink signal qualities and feeds this information back to the mobile terminal. The terminal uses this feedback to select the optimal antenna for uplink transmission, thereby improving power efficiency while maintaining signal quality without wasting power on deteriorated paths.
2Productivity
If multiple power amplifiers are used in MIMO system, then transmission capability is improved, but system complexity increases
Solution Approach 1:
The patent extracts and selects only the most effective antenna path from multiple available paths based on real-time signal quality assessment. By taking out only the necessary component (the best antenna) rather than utilizing all available power amplifiers simultaneously, the system maintains transmission capability while reducing the active complexity of the system.
Solution Approach 2:
The patent applies partial action by using only the optimal antenna path for transmission rather than activating all multiple power amplifiers. This selective activation maintains sufficient transmission capability through the best path while avoiding the excessive complexity and power consumption associated with using all available amplifiers simultaneously.
3Productivity
If dynamic antenna selection is implemented, then transmission efficiency is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent performs preliminary measurement of downlink signal qualities from all available antennas before making the selection decision. By conducting these measurements in advance and storing the signal quality information, the system simplifies the real-time selection process and reduces the complexity of detecting and measuring signal characteristics during actual transmission.
Solution Approach 2:
The patent introduces the base station as an intermediary that performs signal quality measurements and processing. The base station acts as a mediator between the mobile terminal and the multiple antennas, handling the complex measurement and detection tasks centrally and providing simplified selection information to the terminal, thereby reducing the detection and measurement difficulty at the mobile end.
Data Source
AI summary
A communications apparatus. Multiple antennas are arranged to receive downlink signals and transmit uplink signals. A transceiver module is arranged to receive the downlink signals from the antennas and pass the uplink signals to an antenna selection device. The antenna selection device is coupled between the antennas and the transceiver module and arranged to receive the uplink signals to be transmitted from the transceiver module and dynamically pass the uplink signals to one of the antennas according to an antenna selection signal. A processor is arranged to receive the downlink signals from the transceiver module, calculate short-term signal qualities of the downlink signals and generate the antenna selection signal according to the short-term signal qualities.