Configurable Resample Filter for Flexible Sampling Rate Conversion
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Solution Overview
Problem
Traditional resampling technologies have rigid converter structures, leading to excessive processing costs and inefficiencies, particularly in applications like spectrum analysis, where flexible sampling frequencies are needed.
Innovation Solution
A resampling apparatus with a configurable filter structure, comprising a control unit, memory device, phase rate generator, coefficient generator, and resample filter, which uses pipeline stages and converters to dynamically adjust sampling rates and support synchronization detection, allowing for efficient resampling with reduced operational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional resample filters with rigid converter structure are used, then device complexity is reduced, but adaptability deteriorates due to inability to configure different sampling frequencies
Solution Approach 1:
The patent implements a dynamic resampling apparatus where the converter structure can be reconfigured through control signals to support different interpolation/decimation ratios. The control unit receives configuration signals and dynamically adjusts the resampling operation, allowing the same hardware to adapt to various sampling frequency requirements without physical reconfiguration.
Solution Approach 2:
The patent changes the operational parameters of the resampling apparatus by introducing configurable interpolation/decimation ratios. The control unit modifies the resampling behavior based on input parameters, enabling flexible sampling frequency conversion while maintaining the same physical structure. This parameter-based configuration resolves the contradiction between fixed structure and variable functionality.
2Productivity
If traditional resample filters are used, then device complexity is reduced, but processing cost increases due to excessive computational requirements
Solution Approach 1:
The patent employs a dynamic processing structure that adjusts its operational mode based on the resampling requirements. The control unit optimizes the processing path by selecting appropriate interpolation/decimation ratios, enabling faster computation for specific cases while maintaining accuracy. This dynamic adaptation improves computational speed without requiring a completely redesigned processing architecture.
Solution Approach 2:
The resampling operation is segmented into distinct stages: input buffering, resampling computation with configurable ratios, and output formatting. The control unit manages each stage independently, allowing optimization of computational resources at each step. This segmentation enables efficient processing by focusing computational effort only where needed, reducing overall processing cost.
3Adaptability or versatility
If fixed sampling rate is used in analog-to-digital converter, then device complexity is reduced, but adaptability deteriorates for spectrum analyzer applications
Solution Approach 1:
The patent enables parameter changes in the sampling rate by introducing a control unit that receives configuration signals and adjusts the resampling operation accordingly. The system can switch between different interpolation/decimation ratios to achieve various output sampling rates, making it suitable for spectrum analyzer applications requiring flexible frequency analysis while maintaining a relatively simple base converter structure.
Data Source
AI summary
The present disclosure provides a resampling apparatus and a resampling method. The resampling apparatus includes a control unit, a memory device, a resolution identifier, a phase rate generator, a coefficient generator, and a resample filter. The control unit controls reading and writing operations of the resampling apparatus according to a control signal. The memory device transmits the control signal to the control unit. The resolution identifier sets a resolution bandwidth identity according to an interpolation/decimation (I/D) value of the control signal. The phase rate generator generates a phase select signal and a counter enable signal according to the resolution bandwidth identity. The coefficient generator generates a coefficient select signal according to the resolution bandwidth identity. The resample filter generates a resampled output data according to the phase select signal, the coefficient select signal, and an input data.