Signal Transmission PSD Optimization for Echo Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing copper wire-based broadband access technologies face challenges in meeting high bandwidth requirements due to issues like investment costs, operation and maintenance complexity, and signal interference caused by echo signals in hybrid loopback scenarios, especially with the increasing use of Fiber to the x technologies that shorten the distance between fiber and user equipment.
Innovation Solution
A signal transmission method that optimizes power spectral density (PSD) of transmitted signals by acquiring correlations between PSD and signal-to-noise ratio, and the number of bits for bearing signals, using an optimization algorithm to calculate optimal PSD levels for maximum line rate, thereby reducing echo signals and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same power spectral density is used for transmitting uplink and downlink signals in hybrid loopback mode, then the system structure is simple, but echo signals loop back to the receiver causing large interference and deteriorating system performance
Solution Approach 1:
The patent applies local quality by differentiating the power spectral density allocation between uplink and downlink signals. Instead of using a uniform PSD, the system calculates and applies different PSD levels for each direction based on their specific channel characteristics and interference conditions, thereby reducing echo interference while maintaining structural simplicity
Solution Approach 2:
The patent changes the parameter of power spectral density from a fixed uniform value to variable directional values. By calculating optimal PSD for uplink and downlink separately and adjusting them dynamically, the system reduces echo signal interference while maintaining manageable complexity through automated calculation
2Quantity of substance
If traditional DSL technology is used for broadband access, then investment costs and operation maintenance are advantageous, but it cannot meet the high bandwidth requirements of 400 Mb/s and above
Solution Approach 1:
The patent introduces dynamic PSD optimization that adapts to different channel conditions, user requirements, and traffic patterns. This dynamic adjustment enables the copper-based system to achieve higher bandwidth rates (up to 400 Mb/s and above) by optimizing signal transmission characteristics in real-time, thereby enhancing service capability while preserving the cost advantages of existing copper infrastructure
3Quantity of substance
If OFDM technology with OSD is used to increase bandwidth rate to 500 M, then the transmission rate is improved, but the system complexity and power consumption increase
Solution Approach 1:
The patent implements partial optimization by applying PSD optimization selectively to the most critical frequency bands and transmission directions. Rather than optimizing every parameter at maximum level, the system achieves high transmission rates (up to 500 M) by focusing computational resources on the most impactful parameters, thereby reducing overall system complexity and power consumption while maintaining high performance
Data Source
AI summary
Embodiments of the present invention disclose a signal transmission method. A first correspondence is acquired between both a PSD of transmitted signals of the first communications equipment and a PSD of transmitted signals of a second communications equipment and a signal-to-noise ratio of received signals of the first communications equipment. A second correspondence is acquired between the signal-to-noise ratio of received signals of the first communications equipment and the number of bits for bearing signals. An optimization algorithm is used to calculate a PSD of transmitted signals of the first communications equipment and a PSD of transmitted signals of the second communications equipment.