Adjustable DTC Noise Shaper for Wireless Transmitter Power
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Solution Overview
Problem
The high average power requirements of wireless communication transmitters, particularly in 3GPP standards, significantly reduce battery life in mobile electronics since the entire transmit system must be capable of operating at high transmission power levels, even though it typically operates at lower levels.
Innovation Solution
Implementing a digital-to-time converter (DTC) with adjustable noise shaping and dynamic configuration based on operating conditions, such as transmission power and coexistence bands, to relax noise constraints and reduce power consumption by disabling or adjusting components of the DTC and noise shapers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the transmitter system is designed to operate at high transmission power levels, then the transmitter can achieve high transmission capability, but the battery life is significantly reduced due to high power consumption
Solution Approach 1:
The patent applies dynamics by making the DTC resolution and noise shaper order adjustable based on operating conditions. The system dynamically switches between high-resolution modes (for high power transmission) and low-resolution modes (for low power transmission), allowing the transmitter to adapt its performance characteristics to match current operational requirements rather than maintaining fixed high-capability settings continuously
Solution Approach 2:
The patent implements parameter changes by varying the resolution of the DTC and the order of the noise shaper based on transmission power levels and operating conditions. By changing these parameters dynamically, the system can operate with lower power consumption during low-power transmission while maintaining high-resolution capability when needed, directly addressing the contradiction between power capability and energy consumption
2Reliability
If the DTC operates with high resolution to maintain noise constraints, then the reception quality is improved, but the power consumption increases
Solution Approach 1:
The patent applies partial action by using only the necessary resolution and noise shaping capability required for current operating conditions. Instead of always employing full DTC resolution and high-order noise shapers, the system uses minimal sufficient resources - for example, using lower DTC resolution when transmission power is low and noise constraints are relaxed, thereby reducing power consumption while maintaining adequate reception quality
Solution Approach 2:
The system changes operational parameters (DTC resolution and noise shaper order) based on detected operating conditions such as transmission power level and presence of coexistence bands. This allows the receiver to maintain appropriate noise performance for reliable reception while consuming less power by avoiding unnecessary high-resolution processing when conditions permit
3Power
If the transmitter components are continuously enabled to maintain readiness, then the transmission capability is maintained, but the battery life is reduced
Solution Approach 1:
The patent implements periodic action through dynamic detection of operating conditions and periodic adjustment of DTC and noise shaper configurations. The system periodically assesses whether high-performance modes are needed based on current transmission requirements, switching between high-capability and low-power states rather than maintaining continuous high-readiness, thereby extending battery life while preserving transmission capability when needed
Solution Approach 2:
The system dynamically adjusts its operational state based on real-time detection of transmission power requirements and coexistence band conditions. By making components dynamically adjustable rather than continuously enabled, the transmitter can enter lower-power states during periods when full capability is not required, extending battery life while maintaining the ability to quickly restore full transmission capability when conditions change
Data Source
AI summary
This document discusses apparatus and methods for reducing energy consumption of digital-to-time converter (DTC) based transmitters. In an example, a wireless device can include a digital-to-time converter (DTC) configured to receive phase information from a baseband processor and to provide a first modulation signal for generating a wireless signal, and a detector configured to detect an operating condition of the wireless device and to adjust a parameter of the DTC in response to a change in the operating condition.