Narrowband Pulse-Train Communication for Impulsive Noise Mitigation
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Solution Overview
Problem
Existing communication systems face challenges in mitigating non-Gaussian noise, particularly impulsive noise, which is often technogenic in origin, leading to reduced signal quality, increased bit errors, and increased power consumption, and current digital nonlinear filters are computationally intensive and unsuitable for real-time implementation.
Innovation Solution
Incorporating nonlinear analog filters before the analog-to-digital converter (ADC) to mitigate non-Gaussian noise, combined with linear filtering to separate signals with distinct temporal and amplitude structures, and employing intermittently nonlinear filters to maintain computational efficiency for real-time processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital nonlinear filters are used to mitigate non-Gaussian noise, then signal quality is improved, but computational complexity increases making real-time implementation difficult
Solution Approach 1:
The patent replaces complex digital nonlinear filtering operations with an analog nonlinear filter circuit that operates in the analog domain before ADC. This substitution transforms a computationally intensive digital signal processing task into a simple analog circuit operation, eliminating the computational complexity barrier while maintaining noise mitigation effectiveness.
Solution Approach 2:
The patent applies nonlinear filtering in advance, before the signal undergoes ADC and digital processing. By performing the noise mitigation operation preliminarily in the analog domain, the system avoids the need for complex real-time digital computation while ensuring signal quality improvement is achieved before further processing occurs.
2Reliability
If transmitter power output is increased to overcome interference, then signal quality is improved, but energy consumption increases and interference with nearby receivers worsens
Solution Approach 1:
The patent converts the harmful effect of non-Gaussian noise into a beneficial situation by using an analog nonlinear filter that specifically targets and suppresses impulsive noise components. This allows the system to maintain low transmit power while achieving good signal quality, as the filter effectively removes noise that would otherwise require power increases to overcome.
3Adaptability or versatility
If linear filtering is used to separate signals, then signals with distinct temporal and amplitude structures can be separated, but non-Gaussian noise mitigation is insufficient
Solution Approach 1:
The patent merges linear filtering and nonlinear filtering operations into a unified signal processing architecture. The analog nonlinear filter handles non-Gaussian noise mitigation while linear filtering performs signal separation, and both functions work together in coordination to achieve comprehensive signal processing performance that neither filter type could achieve alone.
Data Source
AI summary
Communications method and apparatus include encoding information into a high-peakedness designed pulse train, converting the designed pulse train into a low-peakedness signal suitable for modulating a narrowband carrier to generate a physical communication signal with desired spectral and temporal properties, and generating and transmitting the physical communication signal. The communications method and apparatus also include receiving and demodulating the physical communication signal, and further converting the demodulated signal into a high-peakedness received pulse train corresponding to the designed pulse train, so that the encoded information may be extracted from the received pulse train.