Injection-Locked Oscillator Lock Detection in Transceiver Arrays
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Solution Overview
Problem
The integration of injection-locked oscillators into transceiver arrays for advanced communication systems, particularly in 5G technology, poses challenges in maintaining injection-locking states and detecting whether oscillators are locked or unlocked, especially at high frequencies, which can lead to complex architectures and unwanted emissions.
Innovation Solution
A system and method that include a master clock generator, an injection-locked oscillator distribution circuit, and an injection-locked detector to determine the locked state of injection-locked oscillators, using a master clock signal and output signal to assess the operating frequency and maintain efficient communication across multiple antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If injection-locked oscillators are integrated into transceiver arrays for 5G communication, then communication capability at high frequencies (6 GHz to 30 GHz) is improved, but maintaining injection-locking states and detecting locked/unlocked states becomes complex
Solution Approach 1:
The patent introduces an intermediary detection circuit that simplifies the complex task of determining oscillator lock status. This circuit receives the injection signal and the oscillator output signal, processes them through mixing and filtering stages, and produces a simplified detection output that indicates whether the oscillator is locked. The intermediary circuit acts as a mediator between the complex oscillator system and the control logic, making the detection process manageable.
Solution Approach 2:
The detection process is segmented into distinct functional stages: signal reception, mixing of injection and output signals, filtering to extract difference frequency components, and final detection. By dividing the complex detection task into these manageable segments, each stage can be optimized independently and the overall system becomes more tractable.
2Adaptability or versatility
If injection-locked oscillators are used in transceiver arrays, then frequency coverage for multiple antennas is improved, but unwanted emissions may occur when oscillators are not properly locked
Solution Approach 1:
The patent implements a feedback mechanism where the detection circuit continuously monitors the lock status of injection-locked oscillators and provides this information back to the control system. When an oscillator is detected to be unlocked, the system can take corrective actions such as adjusting injection signals, modifying operating parameters, or disabling affected channels to prevent unwanted emissions. This closed-loop feedback ensures that harmful emissions are avoided while maintaining broad frequency coverage.
3Adaptability or versatility
If multiple antennas are used to implement communication at required frequency bands, then communication standard compliance is improved, but transceiver chip design complexity increases
Solution Approach 1:
The patent employs a universal detection circuit design that can be applied across multiple antenna channels and frequency bands. The same basic detection architecture (mixing, filtering, and detection stages) serves all injection-locked oscillators in the transceiver array, regardless of which specific antenna or frequency band they serve. This multi-functional approach allows the system to comply with various communication standards across multiple frequency bands while using a standardized, manageable circuit design that doesn't scale linearly in complexity with the number of antennas.
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 approach simplifies the detection of injection-locking states, reduces complexity, and ensures stable operation of injection-locked oscillators, enhancing the reliability and efficiency of transceiver arrays in high-frequency communication systems.
Implementation Method 1
an injection-locked oscillator distribution circuit including an injection-locked oscillator and configured to receive the master clock signal, the injection-locked oscillator configured to generate a reference clock signal based on the master clock signal
Implementation Method 2
an injection-locked detector configured to receive the master clock signal and the output signal, the injection-locked detector further configured to determine whether the injection-locked oscillator is in a locked state or in an unlocked state based on the master clock signal and the output signal
Data Source
AI summary
Systems and methods for integrating injection-locked oscillators into transceiver arrays are disclosed. In one aspect, there is provided an injection-locked oscillator (ILO) distribution system including a master clock generator configured to generate a master clock signal. The ILO distribution system also includes an ILO distribution circuit including an ILO and configured to receive the master clock signal. The ILO is configured to generate a reference clock signal based on the master clock signal. The ILO distribution circuit is further configured to generate an output signal indicative of an operating frequency of the ILO. The ILO distribution system further includes an injection-locked detector (ILD) configured to receive the master clock signal and the output signal. The ILD is further configured to determine whether the ILO is in a locked state or in an unlocked state based on the master clock signal and the output signal.