Timing Synchronization for Multi-Carrier Signals
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Solution Overview
Problem
Multi-carrier modulation signals are sensitive to timing errors, leading to inter-symbol interference and inter-channel interference, which degrade signal quality and require effective timing synchronization to improve communication system performance.
Innovation Solution
A timing synchronization apparatus and method that includes a predicting unit to denoise symbol delays and predict delays based on denoised symbol delays and sampling clock frequency offsets, followed by a timing synchronization unit to perform synchronization according to the predicted values, thereby improving signal-to-noise ratio and reducing timing error effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If timing synchronization is performed on multi-carrier modulation signals, then signal quality is improved, but device complexity increases due to the need for symbol synchronization and sampling clock recovery
Solution Approach 1:
The patent performs timing error prediction in advance using denoised delay values from previous symbols and sampling clock frequency offsets. This preliminary action allows the system to proactively compensate for timing errors before they affect current symbol detection, improving signal quality while managing complexity through predictive rather than reactive synchronization
Solution Approach 2:
The patent introduces a predicting unit as an intermediary component that processes denoised delay values and frequency offsets to generate predicted timing errors. This intermediary layer separates the complex synchronization task into manageable stages: denoising, prediction, and compensation, making the overall system more tractable while maintaining high signal quality
2Measurement precision
If denoising and prediction processing is applied to symbol delays, then timing accuracy is improved, but processing time increases
Solution Approach 1:
The patent performs denoising of delay values using previously received symbols before current symbol processing. This preliminary denoising action prepares cleaner timing error estimates in advance, improving subsequent timing accuracy while distributing processing load over time to minimize real-time processing delays
Solution Approach 2:
The system uses previously received symbols and their denoised delay values to serve the current timing synchronization needs. By leveraging historical data that is already available in the system, the patent avoids additional external measurements or complex real-time processing, thus improving timing accuracy without proportionally increasing processing time
Data Source
AI summary
Embodiments of the present invention provide a timing synchronization apparatus and method for multi-carrier modulation signals. Wherein the apparatus includes: a predicting unit configured to denoise delay of symbols received before a currently received symbol, and to predict delay of the currently received symbol or of a symbol received after the currently received symbol according to the denoised symbol delay and a sampling clock frequency offset; and a timing synchronization unit configured to perform timing synchronization according to a predicted value of the delay of the currently received symbol or of the symbol received after the currently received symbol. With the apparatus and method, a signal to noise ratio of multi-carrier modulation signals may be effectively improved, and an effect of a timing error on a communication system may be lowered, thereby improving performance of the communication system.