Antenna Group Selection Using Trigger Frames for Fast Channel Estimation
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Solution Overview
Problem
Existing communication systems with multiple antennas require lengthy processing times for antenna selection due to the need to collect and analyze signals over a long period, reducing efficiency.
Innovation Solution
The use of trigger frames to sequentially transmit packets and analyze channel information from multiple antenna groups, allowing for rapid selection of the most suitable antenna group based on channel information from individual packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signals are collected and analyzed over a long period to select antennas, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The system performs preliminary channel information collection by sending trigger frames and receiving packets from multiple antenna groups before actual data transmission. This preliminary action allows the system to pre-determine the optimal antenna group, so when data transmission begins, the selection is already complete, thus reducing the time loss without sacrificing measurement precision
Solution Approach 2:
The system uses periodic trigger frames to sequentially activate different antenna groups for packet transmission. By dividing the antenna selection process into periodic cycles where each antenna group is tested in sequence, the system efficiently collects channel information from multiple antenna groups within a compressed time frame, resolving the contradiction between thorough measurement and time efficiency
2Adaptability or versatility
If multiple antenna combinations are tested sequentially, then adaptability is improved, but productivity decreases
Solution Approach 1:
The system performs antenna group evaluation and selection before actual data transmission begins. By conducting the adaptability testing in advance through trigger frame exchanges, the system identifies the optimal antenna combination beforehand, so that during productive data transmission, no time is lost to antenna switching or selection, thus maintaining both adaptability and productivity
Solution Approach 2:
The system divides the antenna array into multiple antenna groups and evaluates them separately through sequential trigger frame exchanges. This segmentation allows for systematic comparison of different antenna combinations' channel conditions, enabling adaptive selection while keeping the evaluation process organized and efficient, thus balancing adaptability with productivity
Data Source
AI summary
A communication system includes a transceiver circuit and a controller circuit. The transceiver circuit sequentially transmits first and second trigger frames to an electronic device, so that the electronic device uses a first number of spatial streams to transmit a first packet in response to the first trigger frame, and uses a second number of spatial streams to transmit a second packet in response to the second trigger frame. The transceiver circuit receives the first packet via a first antenna group and receives the second packet via a second antenna group. The controller circuit determines first channel information according to the first packet, determines second channel information according to the second packet, and selects a corresponding antenna group from those two antenna groups according to the first and second channel information, to receive data from the electronic device via the corresponding antenna group.