Receiver Clock Adjustment for Multi-Receiver Frequency Drift
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Solution Overview
Problem
The receiving performance of receivers connected to a crystal oscillator is affected when one receiver adjusts the oscillator based on frequency deviation, impacting other receivers.
Innovation Solution
A receiver design that includes a crystal oscillator, phase-locked loop, radio frequency module, analog baseband processing module, digital baseband processing module, and an adjusting module, where the digital baseband processing module detects rate deviations and sends them to the phase-locked loop to adjust the frequency, and the adjusting module ensures the rate of the digital baseband signal matches a preset reference signal, thereby minimizing frequency deviations without affecting other receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the TCXO clock signal is adjusted according to frequency deviation information of one receiver, then the receiving performance of that receiver is improved, but the receiving performance of other receivers connected to the same TCXO is affected
Solution Approach 1:
The patent introduces a separate frequency adjustment path for each receiver by adding an adjusting module specific to each receiver. This allows each receiver to independently adjust its own working clock based on its specific frequency deviation, rather than all receivers sharing a single TCXO clock signal. The segmentation enables simultaneous optimization of multiple receivers without mutual interference.
Solution Approach 2:
The adjusting module acts as an intermediary between the TCXO and each receiver's working clock. It receives the TCXO clock signal, applies receiver-specific frequency adjustments based on detected rate deviations, and outputs adjusted clock signals to individual receivers. This intermediary structure allows frequency customization for each receiver while maintaining a shared crystal oscillator source.
2Measurement precision
If the TCXO working clock is adjusted to correct frequency deviation, then clock frequency accuracy is improved, but the working clocks of multiple receivers become inconsistent
Solution Approach 1:
The patent implements dynamic frequency adjustment for each receiver's working clock based on real-time rate deviation detection. Each receiver can dynamically adjust its clock frequency independently according to its specific needs and environmental conditions, allowing the system to adapt to changing conditions while maintaining both accuracy and consistency through individualized optimization.
Solution Approach 2:
The adjusting module changes the frequency parameter of each receiver's working clock independently based on detected rate deviations. By allowing each receiver to have its own frequency adjustment parameter, the system achieves both high frequency accuracy for each individual receiver and overall system consistency, as each receiver operates at its optimal frequency point.
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
This solution effectively adjusts frequency deviations within the receiver while maintaining the receiving performance of other connected receivers, ensuring consistent data rates and minimizing errors caused by temperature-induced frequency drifts in crystal oscillators.
Implementation Method 1
The phase-locked loop is configured to: adjust a frequency adjustment coefficient according to a rate deviation sent by the digital baseband processing module; perform frequency division or frequency multiplication processing on the first clock signal according to an adjusted frequency adjustment coefficient, to obtain a second clock signal
Data Source
AI summary
The present invention provides a receiver, including: a crystal oscillator, a phase-locked loop, a radio frequency module, an analog baseband processing module, an adjusting module, and a digital baseband processing module, where the radio frequency module demodulates a radio signal to obtain an original analog baseband signal; the analog baseband processing module processes the original analog baseband signal to obtain a first digital baseband signal; when demodulating the first digital baseband signal, the digital baseband processing module detects the rate deviation and sends the rate deviation to the phase-locked loop; and the adjusting module adjusts the first digital baseband signal, so that a rate of an adjusted first digital baseband signal is consistent with a rate of a preset reference signal.