Network Signal Processing Apparatus Clock Synchronization
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Solution Overview
Problem
In communication systems, the constant phase adjustment of the receiver's clock signal to synchronize with the transmitter's clock signal leads to reduced system efficiency due to unstable phase conditions, requiring repeated calculations and operations.
Innovation Solution
A network signal processing apparatus comprising a first and second sampling rate converter, and a timing controller, which convert signals between synchronous and asynchronous domains using timing adjustment signals to facilitate efficient clock synchronization and phase tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant phase adjustment of the receiver's clock signal is performed to synchronize with the transmitter's clock signal, then clock synchronization is achieved, but system efficiency is reduced due to repeated calculations and operations
Solution Approach 1:
The patent segments the clock synchronization process into two distinct domains: an asynchronous domain for initial clock signal generation and phase adjustment, and a synchronous domain for stable signal processing. By dividing the system into these separate domains with different operational characteristics, the patent enables efficient operation in each domain without requiring continuous phase adjustments across the entire system, thus resolving the contradiction between achieving synchronization and maintaining system efficiency
Solution Approach 2:
The patent introduces a sampling rate converter as an intermediary component between the asynchronous and synchronous domains. This converter acts as a mediator that transforms signals from the asynchronous domain (where phase adjustment occurs) to the synchronous domain (where stable processing occurs), eliminating the need for repeated phase adjustments in the synchronous domain and thereby improving system efficiency while maintaining clock synchronization
2Measurement precision
If signals are processed in a synchronous domain requiring constant phase tracking, then accurate timing is maintained, but repeated operations are required due to unstable phase conditions
Solution Approach 1:
The patent applies dynamics by allowing the system to operate in different operational modes depending on the domain: the asynchronous domain dynamically adjusts phase and sampling rate to achieve synchronization, while the synchronous domain maintains stable, fixed-parameter operation. This dynamic approach enables timing accuracy to be achieved during the transition phase without requiring continuous complex adjustments during normal synchronous operation, thereby reducing operational complexity
Data Source
AI summary
A network signal processing circuit includes a first signal processing module, a first sampling rate converter, a second signal processing module, a second sampling rate converter and a timing controller. The first signal processing module is utilized for processing a network signal to output a first processed signal. The first sampling rate converter is utilized for performing signal frequency conversion on the first processed signal according to a first clock timing adjusting signal and outputting a first converted signal. The second signal processing module is utilized for processing the first converted signal to output a second processed signal. The second sampling rate converter is utilized for performing signal frequency conversion on the second processed signal according to a second clock timing adjusting signal and outputting a second converted signal. The timing controller is utilized for generating the first and second clock timing adjusting signals.