8-Antenna Uplink Precoding With Reduced Signaling Overhead
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Solution Overview
Problem
Existing wireless communication devices face challenges in efficiently configuring 8 transmit antenna uplink operations, which can strain battery life while maintaining accurate signal transmission and reception, particularly in devices with multiple wireless communication standards.
Innovation Solution
The use of sounding reference signal resource indicators and transmit precoding matrix indicators to configure 8 transmit antenna port configurations for non-codebook and codebook-based uplink communications, allowing selection of combinations with reduced signaling overhead and coherent or partial coherent codebook designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 8 transmit antenna uplink operation is implemented, then signal transmission capability is improved, but power consumption increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the transmit antenna port configuration based on channel conditions and traffic requirements. The system can switch between different antenna configurations (4T4R, 8T4R, 8T8R) and adapt the precoding matrix indicators accordingly, allowing the device to achieve high signal transmission capability when needed while reducing power consumption during normal operation by using fewer antenna ports.
2Reliability
If 8 transmit antenna port configuration is used, then uplink communication performance is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the 8 transmit antenna operation into multiple configurations: 4T4R (4 transmit antennas, 4 receive antennas), 8T4R (8 transmit antennas, 4 receive antennas), and 8T8R (8 transmit antennas, 8 receive antennas). This segmentation allows the system to achieve 8 transmit antenna capability when needed while maintaining lower complexity during normal operation by using the simpler 4T4R configuration, thus resolving the contradiction between performance improvement and complexity increase.
3Adaptability or versatility
If all possible combinations of sounding reference signal resources are allowed, then configuration flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by not requiring all possible combinations of sounding reference signal resources to be configured. Instead, the system configures only the necessary combinations based on the specific 8 transmit antenna operation requirements. The SRI field in DCI formats is designed to indicate only the required SRS resources for the current transmission, avoiding the need to signal all possible combinations, thus reducing signaling overhead while maintaining sufficient configuration flexibility.
Data Source
AI summary
This disclosure relates to techniques for configuring 8 transmit antenna uplink operation in a wireless communication system. A wireless device and a cellular base station may establish a wireless link. The wireless device may receive an indication from the cellular base station of an 8 transmit antenna port uplink configuration to use, which may include a one or more transmit precoding matrix indicators. The wireless device may perform uplink communication with the cellular base station using the 8 transmit antenna port configuration.