Matrix Equalizer Reuse for MIMO Beamsteering
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Solution Overview
Problem
The complexity of calculating beamsteering coefficients in MIMO systems increases significantly with the number of transmission and receiver antennas, leading to increased system complexity and processing overhead, which hampers efficient beamforming operations.
Innovation Solution
The method involves reusing the matrix equalizer computational device to perform beamsteering calculations, leveraging the existing computational structure for both matrix equalization and beamforming operations, thereby reducing the computational load and circuitry required for steering matrix determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of transmission and receiver antennas is increased to improve transmission reliability and capacity, then the beamforming performance is improved, but the complexity of calculating beamsteering coefficients increases significantly
Solution Approach 1:
The patent applies multi-functionality by making the matrix equalizer computational device perform dual purposes: traditional matrix equalization for signal reception and beamsteering coefficient calculation for transmission. This eliminates the need for separate dedicated beamsteering calculation hardware, thereby reducing overall system complexity while maintaining the ability to handle multiple antenna configurations for improved reliability
Solution Approach 2:
The patent merges the beamsteering calculation function with the existing matrix equalizer computational device. By combining these two previously separate functions into a single computational resource, the system reduces the total number of required computational components and processing overhead, directly addressing the complexity issue while preserving beamforming capabilities
2Measurement precision
If dedicated computational resources are allocated for beamsteering calculations, then beamforming accuracy is improved, but the processing overhead and system complexity increase
Solution Approach 1:
The matrix equalizer computational device is designed to perform multiple functions including signal equalization and beamsteering coefficient calculation. This multi-functional approach ensures that beamsteering accuracy is maintained through dedicated computational capability while avoiding the processing overhead associated with separate dedicated resources, as the same hardware is reused for different computational tasks
3Productivity
If more computational devices are added for beamforming operations, then transmission performance is improved, but the circuitry and hardware requirements increase
Solution Approach 1:
The patent implements multi-functionality where the matrix equalizer computational device serves both as a signal equalization component and a beamsteering calculation unit. This approach maintains transmission performance through adequate computational capability for beamforming while avoiding the need to add separate dedicated hardware circuits, thus reducing overall circuitry requirements
Solution Approach 2:
The existing matrix equalizer computational device serves itself by performing additional beamsteering calculations without requiring external dedicated computational resources. This self-service capability allows the system to maintain transmission performance through the reuse of existing hardware, avoiding increased circuitry requirements
Data Source
AI summary
An equalizer is applied to a signal to be transmitted via at least one multiple input, multiple output (MIMO) channel or received via at least one MIMO channel using a matrix equalizer computational device. Channel state information (CSI) is received, and the CSI is provided as an input to the matrix equalizer computational device when the matrix equalizer computational device is not needed for matrix equalization. One or more transmit beamsteering codewords are selected from a transmit beamsteering codebook based on output generated by the matrix equalizer computational device in response to the CSI input to the matrix equalizer computational device.