Virtual Signal Cancellation for Satellite Interference Removal
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Solution Overview
Problem
The scarcity of available frequencies for radio signal communication in satellite systems and the challenge of signal interference lead to inefficiencies in information transmission, necessitating the optimization of frequency use and interference cancellation.
Innovation Solution
Implementing virtual network functions (VNFs) for signal cancellation by digitizing received signals, performing virtualized demodulation and modulation, and dynamically adjusting delays to produce a clean copy of the interferer signal, which is then subtracted from the received signal to enhance throughput and improve signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If signal interference is present in satellite communication, then frequency utilization appears efficient, but signal detection accuracy deteriorates due to carrier interference
Solution Approach 1:
The patent extracts the interferer signal from the received signal by performing virtualized demodulation to recover the bit sequence, then performing virtualized modulation to regenerate the interferer signal waveform. This extracted interferer is then subtracted from the received signal, effectively removing carrier interference while preserving the desired signal and improving detection accuracy.
Solution Approach 2:
The patent introduces an intermediary processing chain consisting of virtualized demodulation and modulation functions that act as mediators between the received signal and the final cleaned signal. These virtual network functions process the signal through intermediate representations (bit sequences and digital waveforms) to achieve interference cancellation without direct physical interference removal.
2Measurement precision
If virtual network functions are implemented for signal cancellation, then signal detection improves, but device complexity increases
Solution Approach 1:
The patent implements universal virtual network functions that can perform multiple operations through software configuration. The same virtualized demodulation and modulation functions can adapt to different modulation schemes and signal conditions, providing flexible interference cancellation capability without requiring dedicated hardware for each specific interference scenario, thus managing complexity through software versatility.
Solution Approach 2:
The patent replaces traditional mechanical/electronic signal processing hardware with software-based virtual network functions. The virtualized demodulation and modulation processes substitute for conventional analog and digital signal processing circuits, enabling flexible interference cancellation through software algorithms rather than fixed hardware architectures, thereby reducing physical device complexity.
Data Source
AI summary
Described herein are systems, methods, and other techniques for canceling an interferer signal from a received signal in a satellite communication system. A signal cancellation function is instantiated at a compute infrastructure. A received signal is digitized to produce a digital waveform of the received signal. A virtualized demodulation is performed on the digital waveform of the received signal to produce a bit sequence of the interferer signal. A virtualized modulation is performed on the bit sequence of the interferer signal to produce a digital waveform of the interferer signal. The digital waveform of the received signal is delayed based on one or more delay factors to produce a delayed digital waveform of the received signal. The digital waveform of the interferer signal is subtracted from the delayed digital waveform of the received signal to produce an output digital waveform.