PLL Clock Synchronization for Rapid Bit Rate Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems face challenges in rapidly changing signal bit rates during communication, requiring efficient methods to adjust bit rates in a short period of time.
Innovation Solution
A communication system comprising a transmission device with a phase synchronizer, generator, and controller, which generates and adjusts a clock signal to change the bit rate, utilizing a fractional N-type PLL for smooth frequency adjustments and operation modes (M1 and M2) to manage bit rate changes based on variation amounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the signal bit rate is changed during communication using conventional methods, then the bit rate can be adjusted, but the adjustment takes a long period of time
Solution Approach 1:
The patent implements dynamic bit rate change capability by enabling the phase synchronizer to adjust the clock signal frequency in real-time during communication operations. The system transitions from static bit rate configuration to dynamic adjustment, allowing the bit rate to be modified without stopping communication. This is achieved through continuous phase synchronization that adapts to frequency changes, resolving the contradiction between maintaining communication continuity and enabling rapid bit rate adjustment.
Solution Approach 2:
The patent changes the fundamental parameter of clock signal frequency to achieve bit rate adjustment. By modifying the frequency parameter of the clock signal generated by the phase synchronizer, the system can dynamically alter the bit rate of transmitted data. This parameter-based approach allows rapid bit rate changes without requiring complex reconfiguration of the entire communication system, thereby reducing adjustment time while maintaining communication operations.
2Speed
If the frequency of the clock signal is changed rapidly to achieve fast bit rate change, then the bit rate adjustment speed improves, but phase synchronization may be lost
Solution Approach 1:
The patent implements a feedback mechanism through the phase synchronizer that continuously monitors and adjusts the clock signal frequency to maintain phase synchronization. The phase synchronizer compares the phase of the received signal with the local clock signal and generates corrective feedback to keep them synchronized even during frequency transitions. This feedback control enables rapid bit rate changes while preventing loss of phase synchronization, resolving the contradiction between speed and reliability.
Solution Approach 2:
The patent prepares for potential phase synchronization issues by implementing proactive measures during frequency transitions. The phase synchronizer anticipates phase misalignment that may occur during rapid frequency changes and applies preemptive correction. This cushioning approach ensures that phase synchronization is maintained throughout the bit rate change process, preventing errors while enabling fast adjustment speeds.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid bit rate changes, maintaining phase synchronization and reducing the time required for adjustments, while minimizing errors and power consumption through optimized frequency control and training signal patterns.
Implementation Method 1
a phase synchronizer that generates a first clock signal, and is configured to be able to change a frequency of the first clock signal
Data Source
AI summary
A communication system according to the present disclosure includes a transmission device and a reception device. The transmission device includes a phase synchronizer, a generator, and a controller. The phase synchronizer generates a first clock signal, and is configured to be able to change a frequency of the first clock signal. The generator generates a transmission signal on the basis of the first clock signal. The controller controls the generator and the phase synchronizer to change the frequency of the first clock signal while generating the transmission signal. The reception device receives the transmission signal.