Equalization Processor Spatial Temporal Weight Update
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Solution Overview
Problem
The multi-tap phase diversity method struggles with achieving effective spatial equalization due to equal handling of spatial and temporal equalization weights, requiring complex calculations and large circuits, making it impractical for devices like in-vehicle radio receivers.
Innovation Solution
A receiving device with multiple delay equalizers performs spatial and temporal equalization by calculating and updating weights separately, using a specific tap's error to minimize weight adjustments for spatial equalization and propagating these updates for temporal equalization, allowing for simultaneous coefficient updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the multi-tap phase diversity method handles spatial and temporal equalization weights equally in one update rule, then the adaptive processing can be implemented, but the calculation becomes complicated requiring large calculation circuits and time
Solution Approach 1:
The patent divides the equalization process into separate spatial equalization and temporal equalization stages. First, spatial equalization weights are calculated using a specific tap, then these weights are propagated to other taps for temporal equalization. This segmentation allows each equalization type to be handled independently with simpler calculations, avoiding the need for complex simultaneous optimization of all weights.
Solution Approach 2:
The patent introduces dynamic weight propagation where the spatial equalization weights are not fixed but are propagated dynamically to temporal equalization weights. This allows the system to adaptively adjust weights based on current signal conditions while maintaining simpler calculation rules at each stage, achieving automation without excessive complexity.
2Adaptability or versatility
If the multi-tap phase diversity method uses one update rule for spatial and temporal equalization weights, then the processing can be unified, but ideal equalization processing cannot be easily implemented
Solution Approach 1:
The patent segments the equalization into distinct spatial and temporal components with separate update rules. Spatial equalization uses a specific tap to calculate weights, while temporal equalization propagates these weights to all taps. This segmentation enables precise control over each equalization type, achieving ideal equalization processing that cannot be obtained with a single unified rule.
Solution Approach 2:
The patent applies different processing quality to different parts of the equalization system. The spatial equalization uses a specific tap with dedicated weight calculation, while temporal equalization uses propagated weights. This local differentiation allows each component to be optimized for its specific function, improving overall equalization precision.
3Reliability
If the receiving device performs complex calculation to converge correction value to optimum solution, then equalization effect is improved, but the calculation time and circuit size increase
Solution Approach 1:
The patent segments the equalization process into two sequential stages: spatial equalization followed by temporal equalization. Each stage uses a dedicated, simpler calculation rule rather than a single complex optimization process. This segmentation reduces calculation time while maintaining reliable equalization effects by focusing computation on specific aspects at each stage.
Solution Approach 2:
The patent performs preliminary spatial equalization to establish base weights before proceeding to temporal equalization. This preliminary action simplifies subsequent calculations by providing starting points for weight propagation, reducing the overall calculation time needed to achieve optimal equalization compared to simultaneous optimization.
Data Source
AI summary
A receiving device includes an equalization processor including multiple delay equalizers. The equalization processor is configured to: obtain a first error between an output of one specific tap in the multiple delay equalizers and a predetermined reference value, and calculate a first weight with which the first error is minimized; cause a calculation result of the first weight to be reflected in all taps in the multiple delay equalizers except the specific tap, obtain a second error between outputs of all taps in the multiple delay equalizers and the predetermined reference value, and calculate a second weight with which the second error is minimized; and update coefficients of all taps in the multiple delay equalizers at the same timing using the calculation result of the first weight and a calculation result of the second weight, and calculate an output of the equalization processor.