Receiver Timing Recovery Correction via Channel Pulse Response
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Solution Overview
Problem
Timing synchronization between a transmitting end and a receiving end in communication systems is often disrupted due to timing errors in clock oscillators, leading to desynchronization of symbol reception, which complicates communication protocols.
Innovation Solution
A feedback mechanism for timing recovery is implemented, utilizing a channel pulse response module to calculate correction signals based on peak times of symbols, allowing the receiving end to synchronize with the transmitting end by adjusting its timing recovery module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a clock oscillator is used to generate timing for symbol transmission and reception, then the communication system can operate at the specified transmission speed, but timing errors occur due to temperature changes and heat energy, causing desynchronization between transmitting and receiving ends
Solution Approach 1:
The patent implements a feedback mechanism where the receiving end detects timing errors in received symbols and generates correction signals that are fed back to adjust the timing recovery module. This closed-loop feedback system continuously corrects timing drift caused by temperature variations and oscillator inaccuracies, maintaining reliable synchronization despite environmental changes.
Solution Approach 2:
The patent adjusts timing parameters dynamically by calculating peak times of channel pulse responses and generating correction signals that modify the timing recovery module's operation. This parameter adjustment compensates for timing drift without changing the fundamental transmission speed, resolving the contradiction between maintaining speed and ensuring reliability.
2Adaptability or versatility
If the receiving end operates at a fixed timing specified by the communication protocol, then the system follows the protocol standard, but timing misalignment occurs when the transmitting end's actual timing deviates due to clock oscillator errors
Solution Approach 1:
The patent introduces dynamic timing adjustment capability to the receiving end through a timing recovery module that can adapt its sampling timing based on detected peak positions. This dynamic adjustment allows the system to maintain protocol compliance while compensating for transmitting end timing deviations, resolving the contradiction between fixed protocol operation and precise timing alignment.
Solution Approach 2:
The feedback mechanism detects timing deviations from protocol specifications and generates correction signals that adjust the timing recovery module. This allows the receiving end to maintain protocol compliance while dynamically adapting to actual transmitting timing, preserving both adaptability and measurement precision.
3Reliability
If timing correction is applied to each symbol at the receiving end, then reception errors are reduced and communication reliability improves, but the device complexity increases due to the need for timing recovery module and correction mechanism
Solution Approach 1:
The timing recovery module operates autonomously by automatically detecting peak times of channel pulse responses and generating correction signals without external intervention. This self-service capability reduces the need for complex external control systems while maintaining high communication reliability through continuous timing correction.
Solution Approach 2:
The feedback-based timing correction mechanism uses simple peak detection and correction signal generation rather than complex error correction codes or retransmission protocols. This feedback approach achieves high reliability with relatively simple device complexity by directly correcting timing errors at the source.
Data Source
AI summary
A correcting apparatus for timing recovery of a receiver is provided. The receiver includes a timing recovery module that outputs a first symbol and a second symbol. The correcting apparatus includes: a channel impulse response module, configured to generate a first set of peak times and a second set of peak times according to the first symbol and the second symbol, respectively; and a calculation module, configured to calculate a correction signal according to a relationship between the first and second sets of peak times and to send the correction signal to the timing recovery module.