Dynamic Radio Receiver Filtering for Mixed Packet Bandwidths
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Solution Overview
Problem
Modern wireless communication devices need to support multiple versions of a protocol while maintaining backward compatibility, leading to increased silicon area and power consumption due to the requirement of separate components for each data packet type.
Innovation Solution
A configurable filter, re-sampler, and mixer are used to process both types of data packets, dynamically adjusting their configuration based on the packet type to optimize filtering and reduce unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate components are provided for each data packet type, then processing reliability is improved, but device complexity and silicon area increase
Solution Approach 1:
The patent implements a universal receiver architecture where a single filter, re-sampler, and mixer can process multiple types of data packets (both first type with wider frequency range and second type with narrower frequency range). The components are configured dynamically based on packet type detection, eliminating the need for separate dedicated components for each packet type while maintaining processing reliability.
Solution Approach 2:
The patent employs dynamic configuration of the filter, re-sampler, and mixer based on the detected packet type. When a second type packet (narrower bandwidth) is detected, the filter is reconfigured to attenuate frequencies outside the second range, and the re-sampler and mixer are adjusted accordingly. This dynamic adaptation allows single components to optimally handle different packet types without requiring separate static components for each type.
2Measurement precision
If separate components are provided for each data packet type, then processing precision is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic reconfiguration of the filter, re-sampler, and mixer based on the type of data packet being received. Rather than maintaining multiple sets of components in constant operation, the system dynamically switches configurations periodically as different packet types are detected, reducing overall power consumption while maintaining processing precision for each packet type.
Solution Approach 2:
The patent changes operational parameters of the filter, re-sampler, and mixer based on packet type detection. For second type packets with narrower frequency ranges, the filter parameters are adjusted to attenuate out-of-band frequencies more aggressively, and the re-sampler and mixer parameters are modified accordingly. This parameter adaptation maintains processing precision while avoiding the power consumption of dedicated components.
3Adaptability or versatility
If a fixed filter configuration is used for the wider frequency range, then compatibility with first type packets is improved, but signal-to-noise ratio for second type packets deteriorates
Solution Approach 1:
The patent implements dynamic filter configuration that adapts to the detected packet type. When a second type packet is detected, the filter is reconfigured to attenuate frequencies outside the narrower second range, improving signal-to-noise ratio for these packets. This dynamic adjustment maintains broad protocol compatibility while optimizing performance for specific packet types.
Solution Approach 2:
The patent changes the filter's frequency attenuation parameters based on packet type detection. For first type packets, the filter maintains a wider passband to ensure compatibility. For second type packets, the filter parameters are modified to provide sharper attenuation outside the narrower frequency range, thereby improving signal-to-noise ratio without sacrificing compatibility with either packet type.
Data Source
AI summary
A digital radio receiver comprises a configurable filter, a configurable re-sampler and a configurable mixer, and operates in accordance with a predetermined radio communication protocol which defines a first type of data packet that, when transmitted, occupies a first range of frequencies, and a second type of data packet that, when transmitted, occupies a second range of frequencies, the first range being wider than the second range. The filter, re-sampler and mixer process data packets of both the first and second type. By default, the filter attenuates frequencies that fall outside of the first range. When the receiver receives a data packet transmitted by a remote device it determines whether the data packet is of the second type and, if so, it configures the filter to attenuate frequencies that fall outside of the second range, and configures the re-sampler and mixer in dependence on the determination.