OTFS QLO Modulation Combining OAM for Spectral Efficiency
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Solution Overview
Problem
Current communication systems face challenges in increasing spectral efficiency to support the growing demand for voice and data transmissions, particularly in mobile communication networks, due to limitations in bandwidth and interference, especially when handling video communications.
Innovation Solution
The system combines quantum level overlay (QLO) modulation with orthogonal time frequency space (OTFS) modulation to generate an OTFS/QLO modulated data stream, which is then transmitted, utilizing orbital angular momentum to enhance spectral efficiency by creating independent channels within the symbol and allowing for efficient multiplexing and demultiplexing of data streams on the same frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional bandwidth expansion methods are used to increase capacity, then more channels or higher transmission speeds can be achieved, but interference increases and spectral efficiency remains limited
Solution Approach 1:
The patent introduces a new dimension for signal differentiation by applying orbital angular momentum (OAM) to create multiple independent data streams that can be multiplexed on the same frequency. This transforms the traditional single-dimensional frequency usage into multi-dimensional signal space, allowing multiple channels to coexist without interfering with each other, thereby increasing capacity while maintaining spectral efficiency
Solution Approach 2:
The patent segments the data stream into multiple independent layers, each modulated with different OAM modes. This segmentation allows parallel transmission of multiple data streams through the same physical channel, effectively multiplying the capacity without requiring additional frequency resources or increasing interference
2Productivity
If more channels are created to increase bandwidth capacity, then more communications can be transmitted, but the system complexity and interference management become more difficult
Solution Approach 1:
The patent merges multiple data streams into a single transmission medium by using OAM-based spatial multiplexing. Instead of creating physically separate channels, the system combines multiple logical channels into one frequency band, using the spatial dimension of OAM modes to distinguish between them. This reduces channel management complexity while increasing the number of simultaneous communications
3Productivity
If transmission speed is increased to provide greater throughput, then existing channel resources are utilized more efficiently, but signal-to-noise ratio deteriorates and distance coverage is reduced
Solution Approach 1:
The patent uses OAM modes to create additional orthogonal dimensions for data transmission. Each OAM mode represents an independent channel that can carry data at high speeds without interfering with other modes. This allows the system to achieve high throughput through spatial multiplexing rather than simply increasing the speed of a single channel, thereby maintaining signal-to-noise ratio and distance coverage
Data Source
AI summary
A system for wirelessly transmitting data provides an input for receiving an input data stream. First modulation circuitry applies quantum level overlay (QLO) modulation to the input data stream to generate a QLO modulated data stream. Second modulation circuitry applies quantum level orthogonal time frequency space (OTFS) modulation to the QLO modulated data stream to create an OTFS/QLO modulated data stream. A transmitter transmits the OTFS/QLO modulated data stream.