Dynamic Rx Beam Sweeping for OFDM Signal Measurement
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Solution Overview
Problem
Current radio communication systems face challenges in efficiently managing beam configurations for optimal signal reception, particularly in scenarios where reference signals are sparsely allocated within OFDM symbols, leading to suboptimal beam selection and measurement accuracy.
Innovation Solution
The implementation of dynamic receive beam sweeping and frequency domain intra-orthogonal frequency-division multiplexing (OFDM) symbol multi-Rx beam measurement techniques, which allow communication devices to switch between multiple receive configurations during a single OFDM symbol reception period, enabling more accurate signal quality assessments and faster beam selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If reference signals are sparsely allocated in OFDM symbols, then resource efficiency is improved, but beam measurement accuracy deteriorates
Solution Approach 1:
The patent segments the OFDM symbol into multiple reception periods, with each period dedicated to receiving reference signals for a specific receive beam. This segmentation allows the system to maintain sparse overall allocation while ensuring sufficient reference signal density for each individual beam measurement, thereby resolving the contradiction between resource efficiency and measurement accuracy.
Solution Approach 2:
The patent implements dynamic receive beam switching during the OFDM symbol reception, where the receive beam is changed between different reception periods within the same OFDM symbol. This dynamic approach enables multiple beam measurements to be performed efficiently within a single symbol duration, maintaining both resource efficiency and measurement accuracy.
2Reliability
If beam sweeping is performed across multiple OFDM symbols, then comprehensive beam measurement is improved, but time consumption increases
Solution Approach 1:
The patent merges multiple reception periods into a single OFDM symbol, allowing the receiver to perform measurements for multiple receive beams within one symbol duration. By combining what would traditionally require multiple symbols into one, the system achieves comprehensive beam measurement while significantly reducing time consumption.
Solution Approach 2:
The patent maintains continuous reception and measurement action throughout the entire OFDM symbol by dividing it into multiple reception periods without idle gaps. This continuous utilization of the OFDM symbol ensures that no measurement opportunity is lost, achieving comprehensive beam coverage efficiently within the time constraint.
3Productivity
If multiple receive configurations are measured within a single OFDM symbol, then measurement speed is improved, but signal reception complexity increases
Solution Approach 1:
The patent segments the single OFDM symbol into multiple distinct reception periods, with each period assigned to a specific receive beam configuration. This segmentation simplifies the reception process by providing a structured, periodic approach to handling multiple beams, making the system manageable despite the increased measurement capacity.
Solution Approach 2:
The patent employs periodic switching between receive beam configurations during the OFDM symbol, where each receive beam is activated in a regular, periodic manner across different reception periods. This periodic action pattern simplifies the control logic and signal processing requirements compared to arbitrary or simultaneous multi-beam reception, thereby managing complexity while achieving high measurement speed.
Data Source
AI summary
A communication device comprises a receiver including at least two receive antennas and configured to receive at least one reference signal of a plurality of reference signals, each reference signal being transmitted from at least one base station at a predefined reference signal transmission time; a controller configured to switch between at least two receive configurations of the at least two antennas during a reception period of the at least one reference signal; and a signal quality determiner configured to determine a parameter indicative of a first signal quality of the received reference signal for each receive configuration.