RF Signal Calibration Using Shared Bandwidth Parameters
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Solution Overview
Problem
The transmission of wideband signals in RF communication circuits leads to Inter Symbol Interference (ISI) due to channel multipath effects and undesirable RF component characteristics, necessitating separate calibration parameters for each type of communication service, which occupies excessive storage space.
Innovation Solution
A method for calibrating signals involves generating a calibration parameter for a signal with a preset bandwidth, using frequency conversion, sampling, and equalization to obtain a calibrated signal, allowing reuse across different signals within a frequency band, thereby reducing the need for dynamic adaptation and parameter storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate calibration parameters are used for each type of communication service, then the calibration accuracy for different services is improved, but the storage space occupied by parameters increases and the system complexity increases
Solution Approach 1:
The patent applies universality by designing a calibration parameter generation apparatus that can generate calibration parameters applicable to multiple communication services (e.g., NR, LTE, NR-LAA) using a unified approach. The apparatus generates calibration parameters based on frequency and sampling rate without requiring separate parameter sets for each service type, thereby reducing storage space while maintaining calibration accuracy across different services.
2Measurement precision
If separate calibration parameters are used for each type of communication service, then the calibration accuracy for different services is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by creating a unified calibration parameter generation apparatus that handles multiple communication services (NR, LTE, NR-LAA) through a single system. The apparatus uses frequency and sampling rate as key inputs to generate appropriate calibration parameters regardless of service type, eliminating the need for complex service-specific calibration paths and reducing overall system complexity.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting calibration parameters based on frequency and sampling rate variations rather than maintaining separate parameter sets for each service. The apparatus modifies parameters like frequency offset and sampling rate compensation values according to the specific signal characteristics, achieving service-specific calibration accuracy through continuous parameter adaptation rather than discrete parameter storage.
3Reliability
If dynamic adaptation is implemented for different signals, then the calibration performance is improved, but the computational complexity and processing time increase
Solution Approach 1:
The patent applies preliminary action by pre-establishing the calibration parameter generation framework and algorithms before actual signal processing. The apparatus is configured with predefined relationships between frequency, sampling rate, and calibration parameters, allowing it to quickly generate appropriate calibration values without requiring complex real-time computations. This preliminary setup enables fast adaptation to different signals while maintaining high calibration performance.
Data Source
AI summary
In a method for calibrating a signal, a calibration parameter corresponding to a signal having a preset bandwidth is obtained and a calibrated signal is obtained by calibrating, based on a frequency of a signal to be calibrated and the calibration parameter, the signal to be calibrated.