Matrix Resource Element Mapping for Millimeter Wave Port Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently mapping resource elements to ports for reference signals, particularly in millimeter wave communication, where a large number of antennas are paired with a smaller number of RF chains, leading to inefficiencies in beamforming and data transmission.
Innovation Solution
The implementation of matrix-based techniques for mapping resource elements to ports, which allows for independent mapping periodicities in time and frequency, minimizing overhead and enabling simultaneous sweeping of transmit and receive beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a large number of antennas are paired with a smaller number of RF chains in millimeter wave communication, then the device complexity is reduced, but the productivity of data transmission decreases due to inefficiencies in beamforming and resource element mapping
Solution Approach 1:
The patent segments the mapping process into separate time and frequency components, allowing independent optimization of each dimension. This enables efficient resource element to port mapping even with fewer RF chains by systematically organizing the mapping across time periods and frequency subcarriers
Solution Approach 2:
The patent introduces independent mapping periodicities in both time and frequency dimensions, transforming a single-dimensional mapping problem into a two-dimensional solution space. This allows the system to achieve higher productivity by utilizing both time and frequency resources more effectively despite having fewer RF chains
2Device complexity
If traditional resource element mapping is used without independent time and frequency periodicities, then the device complexity is low, but the loss of time increases due to inability to perform simultaneous beam sweeping
Solution Approach 1:
The patent makes the mapping periodicities dynamic and configurable in both time and frequency domains, allowing the system to adapt to different beamforming requirements. This dynamic approach enables simultaneous beam sweeping operations by independently controlling the mapping periodicity in each dimension
Solution Approach 2:
The patent implements periodic mapping patterns in both time and frequency dimensions with independently configurable periodicities. This periodic structure enables coordinated beam sweeping operations where transmit and receive beams can be swept simultaneously by aligning the periodic mappings appropriately
3Ease of operation
If reference signals are mapped without optimized resource element distribution, then the ease of operation is high, but the loss of information increases due to overhead and reduced data rates
Solution Approach 1:
The patent changes the mapping parameters by introducing independent periodicities for time and frequency dimensions. This parameter optimization allows reference signals to be distributed more efficiently across resource elements, reducing overhead while maintaining ease of operation through systematic mapping patterns
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Techniques are described for wireless communication. A method of wireless communication at a first wireless device includes identifying a template mapping of a plurality of ports to a first plurality of frequency subcarriers and a first plurality of time periods of a template time-frequency resource grid; mapping a plurality of resource elements of an orthogonal frequency-division multiplexing (OFDM) time-frequency resource grid to the plurality of ports based at least in part on the template mapping; receiving a reference signal from a second wireless device, on a subset of the plurality of ports, based at least in part on the mapping; and decoding the reference signal from a subset of the plurality of resource elements based at least in part on the mapping. In some cases, each port of the plurality of ports is associated with a corresponding radio frequency (RF) chain.