Soft-Value Signal Decoding Under Phase Error Compensation
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Solution Overview
Problem
Conventional signal processing systems fail to correctly process received signals due to phase errors such as sampling time offset, carrier frequency offset, phase noise, and sampling clock offset, which are not adequately addressed by existing technologies.
Innovation Solution
A signal processing system and method that calculates phase errors and generates weights based on these errors to adjust signals, allowing for improved decoding performance by calibrating and mapping signals into soft values for accurate decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional phase calibration is used to correct phase errors, then phase alignment is improved, but decoding performance deteriorates due to residual phase errors affecting soft values
Solution Approach 1:
The patent applies preliminary action by calculating and compensating for phase errors before the decoding process. The phase error is calculated from the received signal, and soft values are adjusted using this phase error information before being passed to the decoder, ensuring that decoding operates on corrected data without requiring complex phase tracking during decoding itself
Solution Approach 2:
The patent introduces an intermediary mechanism by using phase error information as a mediator between the received signal and the decoder. Instead of directly correcting the signal or using complex phase tracking, the phase error serves as an intermediate parameter that adjusts the soft values, bridging the gap between phase-corrected and phase-uncorrected processing paths
2Measurement precision
If phase error information is incorporated into decoding, then decoding accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies local quality by incorporating phase error information only where it is most needed - in the calculation and adjustment of soft values - rather than throughout the entire decoding system. This localized approach allows phase error compensation to improve decoding accuracy without requiring complex phase tracking mechanisms across all decoding operations
Solution Approach 2:
The patent uses parameter changes by modifying the soft values based on phase error parameters. Instead of changing the fundamental decoding algorithm or adding complex phase tracking parameters, the system adjusts existing soft value parameters using phase error information, achieving improved accuracy through simple parameter adjustment rather than structural complexity
Data Source
AI summary
A signal processing system is provided. The system includes a calculating apparatus, for calculating a phase error of a received signal and generating a weight according to the phase error; a signal adjusting apparatus, coupled to the calculating apparatus, for generating a plurality of soft values according to the weight and the received signal; and a decoder, coupled to the signal adjusting apparatus, for decoding the soft values to generate data.