Adaptive Flexible Bandwidth Waveforms for Spectrum Utilization
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Solution Overview
Problem
Wireless communication systems face inefficiencies due to unused portions of spectrum that are not large enough to fit standard waveforms, leading to underutilization of bandwidth and requiring additional infrastructure for capacity and peak data rate support.
Innovation Solution
Implementing flexible bandwidth waveforms and channels that can adapt chip rates dynamically to fit into unused spectrum, allowing for both smaller and larger bandwidths, and enabling the splitting or combining of channels to optimize capacity and data rates without increasing infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard waveforms are used with fixed bandwidth channels, then system reliability is maintained, but spectral efficiency deteriorates due to unused spectrum portions that are not large enough to fit standard waveforms
Solution Approach 1:
The patent implements dynamic bandwidth adjustment by allowing wireless communication systems to adaptively change channel bandwidth based on available spectrum resources. The system can dynamically select from multiple bandwidth configurations (e.g., 1.4, 3, 5, 10, 15, 20 MHz) to match available spectrum portions, transforming the static fixed-bandwidth approach into a dynamic adaptive one that optimizes spectral efficiency while maintaining reliable communication.
Solution Approach 2:
The patent changes the bandwidth parameter of communication channels from fixed to variable. By supporting multiple bandwidth configurations and allowing seamless switching between them, the system can adapt to different spectrum availability conditions. This parameter change enables the system to utilize previously unusable small spectrum portions while maintaining compatibility with standard waveforms through appropriate parameter selection.
2Productivity
If cell splitting is performed in the spatial domain to support higher capacity, then user capacity increases, but device complexity and infrastructure requirements worsen due to need for more towers, equipment, and backhaul connections
Solution Approach 1:
Instead of dividing the spatial dimension (cell splitting into smaller geographical areas requiring more towers), the patent divides the frequency dimension by supporting multiple bandwidth configurations within the same spatial coverage area. This dimensional shift allows the system to increase user capacity by efficiently packing more communication channels into the available spectrum without adding physical infrastructure.
Solution Approach 2:
The patent makes the communication system universal by designing it to handle multiple bandwidth configurations (1.4, 3, 5, 10, 15, 20 MHz) within a single infrastructure. This multi-functionality allows the same base station and tower to serve multiple users with different bandwidth requirements, eliminating the need for separate infrastructure for different capacity levels.
3Speed
If multiple independent channels are assigned to one user to support higher peak data rates, then peak data rate increases, but device complexity increases due to need for separate channel management
Solution Approach 1:
The patent merges multiple channel assignments into a single unified channel with variable bandwidth. Instead of assigning multiple independent channels to one user, the system provides a single channel that can dynamically adjust its bandwidth to deliver the required peak data rate. This consolidation simplifies channel management while maintaining the ability to support high data rates through bandwidth adaptation.
Data Source
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AI summary
Methods, systems, and devices are described for providing flexible bandwidth waveforms and channels for wireless communication. Embodiments may utilize portions of spectrum that may not be large enough to fit a standard or normal waveform. Chip rates may be adapted dynamically to generate and/or to receive flexible bandwidth waveforms to fit these portions of spectrum. Scaling factors and/or center frequencies may also be utilized to generate flexible waveforms. A mobile device may receive adjustment information from a base station so that the mobile device may dynamically adjust its chip rate to utilize a flexible bandwidth channel. A base station may simultaneously transmit on a normal bandwidth channel and a flexible bandwidth channel in some cases. Some flexible bandwidth waveforms may be utilized that are larger, or take more bandwidth, than a normal waveform. Flexible bandwidth may also be utilized to split and/or combine frequency channels.