MoCA Preamble Generator for High Throughput Mode
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Solution Overview
Problem
Current MoCA devices in home networking over coaxial cables have limited transmission speed, which restricts the throughput and efficiency of data transmission in MoCA networks.
Innovation Solution
Implementing a high throughput mode for MoCA devices by doubling the bandwidth to 100 MHz, adjusting RF circuitry, and increasing the preamble length to reduce intersymbol and intercarrier interference, while maintaining compatibility with existing MoCA 1.1 standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the bandwidth is doubled to 100 MHz for high throughput mode, then the transmission speed and PHY rate performance are improved, but the preamble length must be increased to reduce intersymbol and intercarrier interference
Solution Approach 1:
The patent changes the bandwidth parameter from 50 MHz to 100 MHz to achieve high throughput mode, and simultaneously adjusts the preamble length parameter to maintain signal integrity. This parameter change resolves the contradiction by optimizing both transmission speed and interference reduction through coordinated parameter adjustment.
Solution Approach 2:
The patent incorporates a longer preamble before the actual data transmission to prepare the receiver for the high-speed signal. This preliminary action reduces intersymbol and intercarrier interference by providing additional training symbols that enable the receiver to synchronize and equalize the high-speed signal more effectively.
2Reliability
If the preamble length is increased to reduce intersymbol and intercarrier interference, then the signal acquisition issues are reduced, but the time required for signal acquisition increases
Solution Approach 1:
The patent adjusts the preamble length parameter to an optimized value that balances signal acquisition reliability with acquisition time. By carefully selecting the preamble length, the system achieves sufficient training symbols for reliable signal acquisition while minimizing the time penalty.
Solution Approach 2:
The patent uses a preamble that is longer than the minimum required for basic synchronization, providing excessive training symbols that improve signal acquisition reliability. This partial excessive action ensures robust signal acquisition in high-throughput mode while the overall time increase remains acceptable for the application.
3Productivity
If the bandwidth is increased to 100 MHz, then the PHY rate performance is improved by approximately 40%, but the susceptibility to intersymbol and intercarrier interference increases
Solution Approach 1:
The patent changes the bandwidth parameter to 100 MHz to achieve approximately 40% higher PHY rate performance, and simultaneously adjusts the preamble length parameter to compensate for the increased susceptibility to intersymbol and intercarrier interference. This coordinated parameter change resolves the contradiction between productivity and harmful factors.
Solution Approach 2:
The patent uses a longer preamble as a preliminary action to train the receiver on the high-bandwidth signal characteristics before data transmission begins. This preliminary training enables the receiver to better equalize and filter out intersymbol and intercarrier interference that arises from the increased bandwidth operation.
Data Source
AI summary
Systems and methods for increasing preambles are provided. In some aspects, an electronic device configured for use as a node in a home network is provided. The electronic device includes a preamble generator configured to generate an outbound preamble for a data signal. The electronic device also includes a preamble increasing circuit configured to increase a size of the outbound preamble based on a switching signal.