Digital Interface Word-Length Switching for SNR and Power Balance
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Solution Overview
Problem
Current digital interfaces in mobile devices, such as the DigRF interface, face challenges in efficiently transferring digital data due to fixed word lengths, which do not adapt to changing signal quality, leading to suboptimal performance in terms of signal-to-noise ratio (SNR) and power consumption.
Innovation Solution
The system dynamically adjusts the word length of digital words based on signal quality parameters like SNR, modulation scheme, and transmission power by preconfiguring multiple word lengths and switching between them using logical channels, ensuring optimal data transfer while maintaining acceptable SNR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed word length is used for digital data transfer, then the interface is simple to implement, but the signal-to-noise ratio performance is suboptimal under changing signal conditions
Solution Approach 1:
The patent implements dynamic word length adjustment by introducing a word length indicator that switches between different predetermined word lengths (first and second word lengths) based on signal quality parameters. This transforms the static digital interface into a dynamic system that adapts to changing signal conditions, resolving the contradiction between fixed simplicity and adaptive performance.
Solution Approach 2:
The patent changes the word length parameter of digital words being transmitted through the interface based on signal quality. By monitoring signal quality parameters and adjusting the word length accordingly (using a first word length under certain conditions and a second word length under other conditions), the system optimizes SNR performance while managing interface complexity through parameter adaptation.
2Reliability
If a longer word length is used for digital words, then the signal-to-noise ratio is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts word length based on actual signal quality conditions rather than using a fixed long word length. When signal quality is good, a shorter word length is used to reduce power consumption; when signal quality degrades, the word length is extended to maintain SNR performance. This dynamic adaptation resolves the trade-off between power consumption and reliability.
Solution Approach 2:
The patent implements parameter changes by switching between different word length values (first and second predetermined word lengths) based on signal quality thresholds. This allows the system to optimize the balance between SNR and power consumption by using only the necessary word length for current operating conditions, avoiding the continuous power overhead of fixed long word lengths.
3Productivity
If the word length is dynamically adjusted, then the data transfer efficiency is optimized, but the device complexity increases
Solution Approach 1:
The patent applies preliminary action by preconfiguring multiple predetermined word lengths and their corresponding signal quality thresholds before operation. The system has a set of ready-to-use word length values stored in advance, eliminating the need for complex real-time calculations or dynamic allocations during data transfer. This preconfiguration simplifies the control mechanism while enabling efficient adaptive word length selection.
Solution Approach 2:
The system introduces dynamic word length adjustment through a control mechanism that monitors signal quality and selects appropriate predetermined word lengths. This dynamic capability optimizes data transfer efficiency by matching word length to signal conditions, while the use of predetermined values keeps the added complexity manageable through structured adaptation rather than arbitrary adjustments.
4Adaptability or versatility
If multiple predetermined word lengths are supported, then the adaptability to signal conditions is improved, but the interface complexity increases
Solution Approach 1:
The patent implements preliminary action by predefining a set of discrete word length values and their associated signal quality ranges before system operation. This preconfiguration allows the interface to support multiple word lengths without requiring complex runtime decision-making or dynamic resource allocation. The interface structure remains relatively simple because the adaptation choices are predetermined and stored in advance.
Solution Approach 2:
The system supports parameter changes by implementing a mechanism that selects from multiple predetermined word length values based on signal quality measurements. This approach provides adaptability to varying signal conditions while managing interface complexity through structured parameter selection rather than unbounded flexibility. The interface handles parameter changes in a controlled manner by switching between predefined options.
Data Source
AI summary
There are disclosed systems and methods that dynamically vary the word length of data being transmitted through a digital interface. In one embodiment, the method comprises: (i) obtaining at least one parameter indicative of a quality of a signal; (ii) if the at least one parameter indicates that the quality of the signal is above a threshold, then transmitting the data as a number of digital words at a first predetermined word length; (ii) if the at least one parameter indicates that the quality of the signal is below the threshold, then transmitting the data as a number of digital words at a second predetermined word length. The second predetermined word length is different from the first predetermined word length.