Digital Chaos Spreading Sequences for Wireless Network Capacity
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Solution Overview
Problem
Current wireless communication systems face challenges in increasing transmission range without reducing data rate, while also minimizing interference and maintaining network capacity, especially in high connectivity environments.
Innovation Solution
The use of digital chaos spreading sequences with distinct waveforms for cooperative wireless transmission, allowing for multiple data streams to be aggregated and embedded within multiple digital chaos waveforms, which are then transmitted using a multiplicity of digital chaos spreading sequences, enabling low probability intercept and low probability of detection, reduced peak-to-average ratio, and increased network capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If transmit power is increased to improve transmission range, then transmission range is improved, but interference to other users increases
Solution Approach 1:
The patent segments the transmission by embedding multiple distinct digital chaos waveforms carrying different data streams simultaneously. Each waveform acts as an independent segment that can be detected separately at the receiver, allowing multiple users to share the same frequency channel without mutual interference, thus improving range without increasing harmful interference.
Solution Approach 2:
The patent changes the fundamental parameter of the signal from traditional modulated carriers to digital chaos waveforms with distinct spreading sequences. This parameter change enables the system to achieve better signal detection through correlation processing at the receiver, improving transmission range without requiring increased transmit power that would cause interference to other users.
2Length of moving object
If data rate is reduced to increase symbol duration for improved range reception, then range reception is improved, but network capacity decreases
Solution Approach 1:
The patent divides the data transmission into multiple parallel channels by embedding different data streams in distinct digital chaos waveforms. Each waveform maintains its own symbol duration and data rate, allowing the system to achieve improved range reception through better detectability while simultaneously maintaining high network capacity through parallel data transmission.
Solution Approach 2:
The patent adds a new dimension to the communication system by using multiple distinct digital chaos waveforms with different spreading sequences. This dimensional expansion allows the system to transmit multiple data streams simultaneously in the same frequency band, achieving both improved range reception and maintained network capacity.
3Productivity
If multiple signals are transmitted to increase network capacity, then network capacity is increased, but signal detection and measurement difficulty increases
Solution Approach 1:
The patent applies local quality by assigning distinct digital chaos spreading sequences to different signals or users. Each signal has its own unique local characteristics (spreading sequence) that enables the receiver to selectively detect and measure individual signals through correlation processing, even when multiple signals are transmitted simultaneously, thus increasing network capacity while maintaining easy signal detection.
Data Source
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AI summary
The present invention teaches a system and method for cooperatively networking digital chaos transmissions. The invention involves using generated digital chaos sequences as spreading sequences at a transmit side, receiving the spreaded signals at a receive side and despreading the signal, recovering signals at the receive side, comparing a stored replica of the digital chaos spreading codes to the digital chaos spreading codes used at the transmit side to, determining if the signals belong to predefined groups based on a predetermined criteria, and forward the signals to a group member based on its group member assignment.