Adaptive Error Correction for QAM Signal Capacity Optimization
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Solution Overview
Problem
Existing optical transmission systems using frequency-division multiplexing for quadrature amplitude-modulated signals face complexities in performance design due to differing receiving characteristics among signals with different multi-value levels, and the need for varying error correction codes affects transmission signal capacity.
Innovation Solution
A communication apparatus and system that include a transmitting unit for sending quadrature amplitude-modulated signals, an addition unit for adding error correction codes, and a control unit that adjusts the number of error correction bits based on the signal type, thereby optimizing transmission signal capacity and reducing differences in receiving characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If frequency-division multiplexing is used to transmit quadrature amplitude-modulated signals, then transmission speed is improved, but receiving characteristics differ among signals with different multi-value levels
Solution Approach 1:
The patent applies local quality by assigning different error correction code configurations to different signal types. Specifically, signals with different multi-value levels (e.g., 16QAM, 64QAM, 256QAM) are equipped with error correction codes tailored to their specific receiving characteristics, allowing each signal type to be optimized independently rather than using a uniform approach across all signals
Solution Approach 2:
The patent changes parameters by adjusting the error correction code strength and configuration based on the signal type and its multi-value level. The control unit dynamically modifies error correction parameters such as code rate and block length according to the specific QAM modulation order, thereby adapting the error correction capability to match the receiving characteristics of each signal type
2Reliability
If error correction codes are added according to multi-value level, then receiving reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies dynamics by implementing a control unit that dynamically selects and configures error correction codes based on the detected signal type and multi-value level. This dynamic adaptation allows the system to automatically adjust error correction parameters without manual intervention, reducing the complexity of performance design while maintaining high receiving reliability for each signal type
Solution Approach 2:
The patent achieves universality by designing a unified error correction framework that can handle multiple signal types (different QAM orders) through a single control mechanism. The same error correction code structure and processing architecture are used across all signal types, with only the parameters being adjusted, thereby reducing overall system complexity while maintaining reliability
3Reliability
If varying error correction codes are used for different signal types, then receiving characteristics are optimized, but transmission signal capacity is reduced
Solution Approach 1:
The patent applies partial action by applying error correction codes selectively based on the signal type and its specific requirements. Instead of applying maximum error correction to all signals, the system applies only the necessary level of error correction for each signal type, thereby optimizing receiving characteristics without unnecessarily reducing transmission capacity for signals that require less protection
Data Source
AI summary
A communication apparatus, a communication system, a communication method, and a non-transitory computer readable medium capable of reducing differences among receiving characteristics of a plurality of quadrature amplitude-modulated signals and optimizing the capacity of transmission signals are provided. A communication apparatus (1) according to the present disclosure includes a transmitting unit (2) capable of transmitting a plurality of types of quadrature amplitude-modulated signals, and an addition unit (3) that adds error correction codes to the quadrature amplitude-modulated signals. Further, the communication apparatus (1) includes a control unit (4) that changes the number of bits of the error correction code according to the type of the quadrature amplitude-modulated signal.