Dynamic Diversity Receiver Control for Wireless Devices
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Solution Overview
Problem
Wireless communication devices face challenges in efficiently using diversity receivers, as they can lead to increased power drain when multiple receivers are operated, even if they do not improve reception in all situations.
Innovation Solution
A method for controlling diversity receivers in wireless communication devices that determines poor coverage by comparing statistics from one and two receivers, using both for diversity when coverage is poor and switching to single-receiver mode for reduced power consumption when coverage is good, allowing for efficient channel acquisition and scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If diversity receivers are used to improve reception, then signal quality is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic switching between diversity receiver mode and single receiver mode based on real-time coverage conditions. The system transitions from a static configuration to a dynamic one where the receiver mode is adjusted according to signal quality metrics, allowing the device to optimize between signal quality and power consumption adaptively.
Solution Approach 2:
The patent changes the operational parameters of the receiver system by switching between different modes (diversity mode with multiple receivers vs. single receiver mode). This parameter change allows the system to adjust the number of active receivers based on coverage conditions, directly addressing the contradiction between signal quality improvement and power consumption.
2Reliability
If multiple receivers are operated for diversity reception, then reception reliability is improved, but device complexity increases
Solution Approach 1:
The system dynamically adjusts the number of active receivers based on coverage conditions, transitioning between diversity mode (multiple receivers) and single receiver mode. This dynamic configuration simplifies the effective device complexity by using only necessary receivers, rather than always operating with maximum complexity.
Solution Approach 2:
The patent applies partial action by using only the necessary number of receivers for the current condition. Instead of always operating with full diversity reception capability, the system uses a single receiver when coverage is good, reducing complexity while maintaining sufficient functionality.
3Reliability
If diversity reception is always enabled, then signal quality is consistently improved, but power drain increases continuously
Solution Approach 1:
The system implements periodic evaluation of coverage conditions and switches receiver modes accordingly. Rather than continuously operating in diversity mode, the system periodically assesses signal quality and transitions to single receiver mode when conditions permit, reducing continuous power drain while maintaining signal quality consistency when needed.
Solution Approach 2:
The patent changes the operational state parameter of the receivers based on coverage conditions. When coverage is poor, the system changes to diversity mode with multiple receivers; when coverage is good, it changes to single receiver mode. This parameter change eliminates continuous power drain while maintaining signal quality improvement when necessary.
Data Source
AI summary
A method for controlling diversity receivers in a wireless communication device includes the steps of: determining if the wireless communication device is experiencing poor coverage (220), using a first receiver and a second receiver for diversity (230) if the wireless communication device is experiencing poor coverage, and using the second receiver for scanning (240) if the wireless communication device is not experiencing poor coverage. Thus, diversity can be used when needed to improve reception. Both receivers, however, can be used in a non-diversity mode to reduce current drain or to speed up channel acquisition when coverage is not poor.