Hybrid Beamforming for Multi-Numerology Interference Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing interference between different numerologies, particularly in multi-numerology systems, which affect beamforming performance and resource utilization.
Innovation Solution
A hybrid beamformer is employed to support multiple numerologies by using a method that includes acquiring channel information, generating precoding matrices, calculating transmission rates, and transmitting signals through multiple antennas, while employing techniques like zero-forcing precoding to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single numerology is used for beamforming, then beamforming performance is optimized for that specific numerology, but the system cannot support multiple numerologies simultaneously
Solution Approach 1:
The beamforming process is segmented into two independent stages: a first stage that generates beamforming weights for a first numerology, and a second stage that generates beamforming weights for a second numerology. This segmentation allows the system to handle multiple numerologies separately while maintaining optimal beamforming performance for each, resolving the contradiction between versatility and performance reliability.
Solution Approach 2:
The base station is designed with multi-functional capability to support both first and second numerologies using the same antenna array. The hybrid beamformer structure enables the system to universally serve multiple numerologies simultaneously, achieving both adaptability and maintained performance through a unified yet flexible architecture.
2Adaptability or versatility
If hybrid beamforming is used to support multiple numerologies, then adaptability improves, but device complexity increases
Solution Approach 1:
The complex beamforming task is divided into two separate, manageable stages, each handling a specific numerology. This segmentation reduces the complexity of designing a single unified beamformer by breaking down the problem into independent first and second stage processing paths, while still achieving multi-numerology support.
Solution Approach 2:
The beamforming system employs dynamic switching between different beamforming weight sets corresponding to different numerologies. This dynamic capability allows the system to adapt to different numerologies without requiring permanent complex hardware for all possibilities simultaneously, reducing overall device complexity through time-division or signal-division multiplexing.
3Productivity
If precoding matrices are generated for multiple numerologies, then transmission rate improves, but calculation complexity increases
Solution Approach 1:
The precoding matrix generation process is segmented into separate first and second stage calculations, each optimized for a specific numerology. This segmentation allows each stage to use numerology-specific algorithms and parameters, improving transmission rate for each numerology while reducing overall calculation complexity compared to a single unified approach that must accommodate all numerologies simultaneously.
Data Source
AI summary
The disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting higher data transmission rates than a 4th generation (4G) communication system such as long term evolution (LTE). A method performed by a base station in a wireless communication system is provided. The method includes acquiring, by the base station, channel information from one or more terminals using one or more numerologies, based on the channel information, generating, by the base station, a first precoding matrix for the one or more terminals, based on the first precoding matrix, calculating, by the base station, a first transmission rate, based on the first precoding matrix, calculating, by the base station, first power corresponding to input power of a radio frequency (RF) stage, based on the first power and the channel information, generating, by the base station, a second precoding matrix, based on the second precoding matrix, calculating, by the base station, a second transmission rate, in case that the first transmission rate is greater than or equal to the second transmission rate, generating, by the base station based on the first precoding matrix, a first signal corresponding to signals to be transmitted through multiple antennas of the base station, and transmitting, by the base station, the first signal through the multiple antennas.