Correlation Device Single Delay Element WPAN Power Reduction
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Solution Overview
Problem
Existing correlation devices for wireless personal area networks (WPANs) have high complexity and power requirements due to the need for multiple delay elements, which complicates hardware and software realization and increases power consumption.
Innovation Solution
A correlation device with a single delay element that serves both for correlation and IIR filtering, achieved by permuting the signal processing sequence to omit one delay element, allowing for efficient hardware or software realization and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple delay elements are used for correlation and IIR filtering, then the correlation function can be performed, but the device complexity and power consumption increase
Solution Approach 1:
The patent combines the correlation function and IIR filtering function into a single unified structure. The delay element serves dual purposes: it provides the necessary delay for correlation computation and simultaneously implements the IIR filtering feedback mechanism. This merging eliminates the need for separate delay elements for each function, reducing device complexity while maintaining both functionalities.
Solution Approach 2:
The delay element is designed to perform multiple functions within the correlation device. It not only delays the signal for correlation purposes but also provides the feedback path required for IIR filtering. This multi-functionality reduces the overall number of components needed in the system, directly addressing the contradiction between reliability and device complexity.
2Reliability
If multiple delay elements are used for correlation and IIR filtering, then the correlation function can be performed, but the power consumption increases
Solution Approach 1:
By merging the correlation and IIR filtering functions into a single operational framework using one delay element, the patent reduces the total number of active components that consume power. The unified structure allows the system to perform both functions with fewer computational operations and less energy expenditure compared to having separate dedicated elements for each function.
Solution Approach 2:
The multi-functional delay element reduces power consumption by eliminating redundant computational paths. Instead of powering separate delay elements for correlation and filtering, a single element performs both tasks, reducing the overall energy budget required for the correlation device operation.
3Device complexity
If the signal processing sequence is permuted to use a single delay element, then the power requirement and structure are simplified, but the implementation must maintain both correlation and IIR filtering functions
Solution Approach 1:
The patent inverts the conventional approach by having the delay element feed back into the addition operation rather than having separate processing paths. This inversion of the signal processing sequence allows a single delay element to serve both correlation and IIR filtering functions, simplifying the overall structure while maintaining computational correctness through careful reordering of operations.
Data Source
AI summary
In certain embodiments, a device includes a first filter. The first filter is operable to produce at least one correlation result by at least correlating an input signal sequence with a link sequence. The first filter includes a delay element. The device also includes a second filter sharing the delay element of the first filter.