Expected-Power-Value Estimation Using Convex Hull Vector Removal
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Solution Overview
Problem
The existing expected-power-value estimation devices face increased computation loads due to the large number of vector values that the array manifold vector can take, leading to inefficient processing.
Innovation Solution
The proposed solution includes a covariance matrix calculation unit and an unnecessary vector value removal unit that removes vector values within the convex hull of the array manifold vector, allowing the expected-power-value estimation unit to process only significant vector values, thereby reducing the computation load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all vector values that the array manifold vector can take are used for expected-power-value estimation, then estimation accuracy is improved, but computation load increases
Solution Approach 1:
The patent extracts and removes unnecessary vector values from the set of all possible array manifold vector values. Specifically, it identifies and eliminates vector values that lie within the convex hull of the array manifold vectors, retaining only the essential vector values that significantly contribute to expected-power-value estimation accuracy while reducing computation load.
Solution Approach 2:
The patent creates a simplified representation by using convex hull geometry to represent the set of unnecessary vector values. Instead of processing all individual vector values, it uses the convex hull boundary to identify and exclude redundant vectors, effectively copying the essential information while discarding redundant data.
2Measurement precision
If the number of vector values for estimation is increased, then estimation precision is improved, but processing time increases
Solution Approach 1:
The patent extracts only the necessary vector values for estimation by removing those contained within the convex hull. This extraction process identifies the minimal set of vector values that maintain estimation precision while reducing the total number of vectors processed, thereby decreasing processing time.
Solution Approach 2:
The patent applies partial action by using only the vector values that lie on or outside the convex hull boundary, rather than processing all possible vector values. This partial set of vector values is sufficient for accurate estimation while significantly reducing the computational burden and processing time.
3Adaptability or versatility
If redundant vector values are included in estimation processing, then comprehensive coverage is achieved, but device complexity increases
Solution Approach 1:
The patent removes redundant vector values by identifying and excluding those within the convex hull of the array manifold vectors. This extraction maintains comprehensive coverage of the essential signal space while eliminating unnecessary computational complexity in the processing architecture.
Solution Approach 2:
The patent changes the parameter of vector value selection from including all possible vectors to including only those on or outside the convex hull boundary. This parameter change simplifies the processing complexity while maintaining adequate adaptability for expected-power-value estimation across different scattering scenarios.
Data Source
AI summary
An expected-power-value estimation device is configured to in such a way as to include: a covariance matrix calculation unit that acquires a received signal vector of a reflected wave from a reception array antenna that receives the reflected wave from a target, and calculates a covariance matrix of the received signal vector; and an unnecessary vector value removal unit that removes a vector value present inside a convex hull of the array manifold vector from among a plurality of vector values that the array manifold vector of the reception array antenna can take. Furthermore, the expected-power-value estimation device includes an expected-power-value estimation unit that estimates an expected-power-value of the reflected wave using a vector value that is not removed by the unnecessary vector value removal unit among the plurality of vector values that the array manifold vector can take, and the covariance matrix calculated by the covariance matrix calculation unit.