Power Line Preamble Polarity Transitions for Noise Resilience
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Solution Overview
Problem
Narrow-band low-rate communications over power line channels face decreased data throughput due to impulsive noise interfering with packet boundary detection, as it often corrupts single polarity transitions in the preamble.
Innovation Solution
Incorporating at least two polarity transitions in the preamble of communication signals transmitted over power line channels, ensuring that even if one transition is corrupted by noise, the other can be detected by the receiving device to determine the boundary between the preamble and header.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single polarity transition is used in the preamble, then the communication signal structure is simple, but the packet boundary detection reliability decreases due to impulsive noise interference
Solution Approach 1:
The patent applies local quality by making different portions of the preamble have different polarity characteristics. Specifically, the preamble is divided into multiple symbols where at least one symbol has a polarity different from adjacent symbols, creating localized polarity transitions that serve as reliable boundary markers resistant to impulsive noise interference.
Solution Approach 2:
The patent segments the preamble into multiple symbols with different polarities rather than using a single uniform polarity transition. This segmentation allows the receiver to detect packet boundaries by identifying polarity changes between adjacent symbols, providing multiple detection opportunities that improve reliability in noisy power line environments.
2Productivity
If narrow band low-rate communications are used over power line channel, then the existing power delivery infrastructure can be utilized, but data throughput decreases due to decreased ability to detect packets
Solution Approach 1:
The patent implements a feedback mechanism where the transmitter sends a preamble with known polarity patterns, and the receiver uses these patterns to detect packet boundaries and provide feedback on detection success. This allows the system to adapt and maintain reliable packet detection despite impulsive noise, thereby preserving data throughput when using existing power line infrastructure.
Data Source
AI summary
Systems, methods, and other embodiments associated with using a preamble with at least two polarity transitions to communicate over a power line channel are described. According to one embodiment, an apparatus includes a transmitter configured to transmit a communication signal on a communication channel for communicating with a remote device. The communication channel is a power line channel that carries electric power transmissions. The apparatus also includes a transmission logic configured to control the transmitter to generate at least two polarity transitions in a preamble of the communication signal.