Asymmetric Receivers for Wireless Spectrum Overload
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Solution Overview
Problem
Wireless communication devices face receiver overload and inefficient utilization of electromagnetic radiation spectrum due to high-power signals and limited licensed and unlicensed spectrum availability, leading to suboptimal data rates and interference-limited performance.
Innovation Solution
Configuring asymmetric receivers in mobile devices to dynamically adjust and tune disparate portions of the electromagnetic radiation spectrum, allowing for interference-agile and self-adjusting operation, thereby maximizing spectrum utilization in overload conditions through techniques like transmit diversity and asymmetric multicarrier spreading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If receiver filters are designed with low quality factors for portability, then device compactness is improved, but adjacent carrier attenuation deteriorates
Solution Approach 1:
The system segments the electromagnetic spectrum into multiple frequency bands and assigns different receivers to different bands. Each receiver processes a specific portion of the spectrum, allowing the use of simpler filters while maintaining overall spectral selectivity through the coordinated operation of multiple receivers.
Solution Approach 2:
The patent employs asymmetric receiver configuration where different receivers have different quality factors and frequency responses optimized for their specific operating bands. This asymmetric design allows each receiver to be tailored for its specific function, achieving adequate adjacent carrier attenuation without requiring all receivers to have high Q-factor filters that would increase device volume.
2Productivity
If spectrum utilization is increased to improve data rates, then communication efficiency is improved, but receiver overload conditions worsen
Solution Approach 1:
The system divides the available spectrum into multiple bands and distributes traffic across these bands using multiple receivers. This segmentation prevents any single receiver from being overloaded by high-power signals in a single band, while the aggregate system achieves high data rates through parallel spectrum utilization.
Solution Approach 2:
The patent introduces an intelligent spectrum management system that acts as an intermediary, dynamically allocating receivers to different frequency bands based on signal strength and interference conditions. This mediator coordinates receiver operation to avoid overload conditions while maximizing overall spectrum utilization for high data rates.
3Productivity
If multiple receivers are configured to tune disparate spectrum portions, then spectrum utilization is improved, but device complexity increases
Solution Approach 1:
The patent designs receivers with universal functionality that can be dynamically configured to operate across different frequency bands. Each receiver is capable of tuning to multiple bands, and the system intelligently assigns receivers to appropriate bands based on current spectral conditions, reducing the need for dedicated hardware for each band while maintaining high spectrum utilization.
Solution Approach 2:
The system employs dynamic receiver configuration where receiver tuning parameters and assignments are adjusted in real-time based on spectral conditions. This dynamic approach allows the system to adapt to changing interference patterns and signal conditions, maintaining optimal spectrum utilization without requiring static complex hardware configurations for all possible scenarios.
Data Source
AI summary
Receivers in a mobile device are configured to mitigate receiver overload and fully or nearly-fully utilize available spectrum for communication. Configuration is dictated at least in part by at least one of radio link quality or available receiver specifications, and it can be affected by the mobile device or a base station that serves the mobile device. Receiver configuration includes various spectrally asymmetric receivers that tune respective disparate portions of the available spectrum to maximize utilization thereof in the spectral regions prone to overload conditions. In severe overload conditions, a single receiver can be configured to operate in a frequency band spectrally adjacent to a sub-band that leads to overload conditions when employed for telecommunication. To improve performance, the single receiver configuration can be supplemented with at least one of transmit diversity operation, asymmetric multicarrier spreading, or downlink power boost of asymmetrical multicarrier spreading.