RF Beam Selection Using Segmented Codebook Search
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Solution Overview
Problem
In 5G wireless communication systems, the complexity and time required for RF beam search increase due to the need to consider all possible RF beam combinations to acquire optimal channel information for multiple antennas, hindering system performance.
Innovation Solution
A method and apparatus that determine reference signal intervals for partial channel estimation, allowing for the selection of reception and transmission RF beams based on full channel information, reducing system complexity and time while enhancing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all possible RF beam combinations are considered to search for optimal RF beam, then performance is improved, but system complexity increases and time required for RF beam search increases
Solution Approach 1:
The patent segments the RF beam search process into two distinct phases: coarse beam search using a first codebook with fewer beams, and fine beam search using a second codebook with more beams. This segmentation allows the system to first quickly identify a candidate beam from a reduced set, then refine the selection, thereby reducing overall system complexity and search time while maintaining performance.
Solution Approach 2:
The patent performs preliminary action by conducting the coarse beam search first to identify candidate beams before performing the fine beam search. This preliminary identification of promising beams from the first codebook narrows down the search space for the second codebook, reducing the total number of beam combinations that need to be evaluated and thus lowering system complexity and search time.
2Reliability
If all possible RF beam combinations are considered to search for optimal RF beam, then performance is improved, but time required for RF beam search increases
Solution Approach 1:
The patent segments the RF beam search process into two distinct phases: coarse beam search using a first codebook with fewer beams, and fine beam search using a second codebook with more beams. This segmentation allows the system to first quickly identify a candidate beam from a reduced set, then refine the selection, thereby reducing overall system complexity and search time while maintaining performance.
Solution Approach 2:
The patent performs preliminary action by conducting the coarse beam search first to identify candidate beams before performing the fine beam search. This preliminary identification of promising beams from the first codebook narrows down the search space for the second codebook, reducing the total number of beam combinations that need to be evaluated and thus lowering system complexity and search time.
3Reliability
If channel information for all antennas is acquired simultaneously, then system performance is improved, but device complexity increases when using multiple ADCs
Solution Approach 1:
The patent segments the channel information acquisition process into multiple time intervals, where channel information for different antennas is acquired sequentially rather than simultaneously. Each antenna's channel information is obtained in a separate time slot, allowing the system to use a single ADC for all measurements, thereby reducing device complexity while still acquiring complete channel information for all antennas.
Solution Approach 2:
The patent employs periodic action by acquiring channel information for different antennas in periodic time intervals. The system sequentially switches between antennas and performs channel measurements in each time slot, creating a periodic measurement pattern that enables complete channel state information acquisition over time without requiring multiple simultaneous ADCs, thus reducing hardware complexity.
Data Source
AI summary
The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method for selecting a radio frequency beam by a receiving apparatus in a wireless communication system supporting a beamforming scheme includes determining a number of reference signal intervals in which a reference signal is transmitted based on a number of transmitting apparatuses, estimating full channel information by repetitively performing a partial channel estimating based on the number of reference signal intervals, and selecting a reception RF beam and a transmission RF beam for each of the transmitting apparatuses based on the full channel information.