Digital IQ Transmitter Sample Rate Control for Lower Power Use
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently managing power consumption due to high sample rates in digital IQ RF transmitters, especially when fewer resource blocks are used, leading to increased power consumption without corresponding reductions in transmission bandwidth or power.
Innovation Solution
Adaptive Sample Rate Reduction (ASRR) dynamically adjusts the sampling rate in the digital front end of transmitters based on actual resource block allocation and transmission bandwidth, reducing power consumption without degrading communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high sample rates are used in digital IQ RF transmitters, then communication quality is maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic sample rate adjustment by monitoring resource block allocation and transmission bandwidth in real-time. The sample rate is adaptively changed based on current transmission conditions - using higher sample rates when resource blocks are abundant and lower sample rates when resource blocks are limited, thereby maintaining communication quality while optimizing power consumption
Solution Approach 2:
The patent changes the sampling rate parameter based on resource block allocation and transmission bandwidth conditions. By adjusting this critical parameter dynamically, the system achieves different operating points that balance communication quality and power consumption according to actual network conditions
2Measurement precision
If high sample rates are used in digital IQ RF transmitters, then signal processing accuracy is maintained, but resource consumption increases
Solution Approach 1:
The system dynamically adjusts sample rate based on resource block allocation and transmission bandwidth. When resource blocks are limited, the sample rate is reduced proportionally, maintaining signal processing accuracy appropriate for the available resources while reducing overall resource consumption
Solution Approach 2:
The sampling rate parameter is changed according to resource block allocation and transmission bandwidth conditions, allowing the system to optimize the balance between signal processing accuracy and resource consumption based on actual network state
3Reliability
If fixed high sample rates are used, then communication performance is consistent, but power consumption cannot be reduced during low bandwidth scenarios
Solution Approach 1:
The patent transitions from fixed to dynamic sample rate operation. The sample rate is continuously adjusted based on resource block allocation and transmission bandwidth, enabling power consumption to scale with actual transmission needs while maintaining communication performance consistency through adaptive optimization
Solution Approach 2:
The system implements feedback mechanisms by monitoring resource block allocation and transmission bandwidth conditions. Based on this feedback, the sample rate is adjusted in real-time, creating a closed-loop control system that balances communication performance and power consumption
Data Source
AI summary
A communication system using adaptive sample rate reduction (ASRR) is disclosed. The system includes a digital front end (DFE) and a radio frequency (RF) interface. The DFE is configured to receive a baseband signal, identify reduced performance parameters for the baseband signal, reduce a sampling rate for the baseband signal based on the reduced performance parameters and generate a digital interface signal using the reduced sampling rate. The RF interface is configured to generate an analog TX signal from the digital interface signal.