Uplink Precoding Antenna Puncturing for Power and Interference Reduction
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Solution Overview
Problem
Current communication systems face challenges in managing power consumption and interference levels, particularly during uplink precoding operations in next-generation mobile communication systems, where high power usage and interference occur, affecting battery life and signal quality.
Innovation Solution
A system and method that dynamically identifies and removes or 'punctures' antenna elements from the codebook used for uplink precoding, reducing power consumption and interference by temporarily setting their transmit power to zero, based on path gain, interference, and battery life considerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all antenna elements are used for uplink precoding, then communication capacity and signal quality are improved, but power consumption and interference levels increase
Solution Approach 1:
The system dynamically adjusts the set of active antenna elements based on current communication conditions, path gains, and power constraints. The codebook is updated to reflect which antenna elements should be actively used versus punctured (set to zero power), allowing the system to adapt between using all antennas for maximum capacity and puncturing specific antennas to reduce power consumption and interference.
2Productivity
If all antenna elements are used for uplink precoding, then communication capacity is improved, but interference levels increase
Solution Approach 1:
The invention extracts or removes specific antenna elements from the active set by puncturing them in the codebook. By identifying antenna elements that contribute disproportionately to interference relative to their benefit, the system selectively removes these elements from precoding operations, thereby reducing overall interference levels while maintaining communication capacity using the remaining beneficial antenna elements.
3Reliability
If high power is used during precoding operations, then signal quality is improved, but battery lifetime is reduced
Solution Approach 1:
The system changes the power parameter for specific antenna elements by setting their power levels to zero through codebook puncturing. Instead of uniformly reducing power across all antennas (which would degrade signal quality), the system selectively adjusts power parameters for individual antenna elements based on their contribution to signal quality versus power consumption, thereby extending battery lifetime while maintaining acceptable signal quality.
Data Source
AI summary
System and method for uplink precoding in a communication system. In one embodiment, an apparatus is operable in a communication system and includes processing circuitry configured to identify an antenna element of a user equipment to disregard for uplink precoding, and provide an instruction to direct the user equipment to remove an antenna port associated with the antenna element from a codebook employed by the user equipment to precode a communication within the communication system.