Receiver Filter Switching for Edge-Coverage Signal Quality
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Solution Overview
Problem
Current receiver devices face challenges in maintaining high signal quality and reducing noise interference, especially at the edge of cellular coverage, which limits data rate capabilities and requires either increasing base station infrastructure or complex diversity receivers.
Innovation Solution
A filter stage with a switching unit that selectively connects an antenna to different types of filters, such as bandpass, SAW, or BAW filters, to optimize signal reception and minimize noise interference, allowing for simpler and more cost-effective receiver architectures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of base stations is increased to minimize distance between terminal and base station, then signal quality is improved, but infrastructure cost increases
Solution Approach 1:
The patent implements dynamic filter selection that adapts to varying signal conditions. The receiver dynamically switches between different filter types (SAW, BAW, LC) based on the received signal characteristics, enabling optimal performance without requiring additional base stations or infrastructure.
2Reliability
If the number of reception paths is increased to achieve more accurate signal reconstruction, then signal quality is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameter of filter type rather than increasing the number of reception paths. By selecting from different filter types (SAW, BAW, LC) with different characteristics, the system achieves accurate signal reconstruction with a single reception path, avoiding the complexity of multiple parallel paths.
Solution Approach 2:
The receiver dynamically selects the appropriate filter type based on signal conditions, enabling adaptive optimization of signal reconstruction accuracy without requiring multiple fixed reception paths. This dynamic adaptation replaces the need for complex static multi-path architectures.
3Adaptability or versatility
If multiple filter types are integrated into the receiver, then adaptability to different signal conditions is improved, but device complexity increases
Solution Approach 1:
The patent implements a dynamic filter selection mechanism that switches between SAW, BAW, and LC filters based on received signal characteristics. This dynamic approach provides adaptability to different signal conditions while maintaining a manageable device complexity through systematic switch control.
Solution Approach 2:
The patent segments the filtering function into distinct filter types (SAW, BAW, LC), each optimized for specific signal conditions. This segmentation allows the system to achieve high adaptability by selecting the appropriate segment (filter type) for each signal condition, while keeping the overall device complexity manageable through modular architecture.
Data Source
AI summary
A filter stage for use in a receiver includes a switch with an input coupled to an antenna terminal, a first output and a second output; a first filter of a first type coupled to the first output; and a second filter of a second type different from the first type, coupled to the second output. A receiver includes a filter stage as mentioned above; and a switching unit coupled to the filter stage for controlling a switching state of the switch, to selectively connect the antenna terminal to the second output, depending on a selection signal.