Observation Receiver ADC Gating for Low-Power DPD Updates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Communication devices face power consumption challenges when updating digital predistortion (DPD) parameters due to the high-speed operation of multiple analog-to-digital converters (ADCs), which is inefficient and costly.
Innovation Solution
A communication device design that uses a separate observation receiver with a wideband ADC for DPD parameter updates, allowing only one or more ADCs to be turned on while the others are turned off, reducing power consumption and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all ADCs operate at high speed during DPD parameter updates, then processing accuracy is maintained, but power consumption increases significantly
Solution Approach 1:
The receiver's ADCs are divided into multiple groups, where only one or a few ADCs are activated at a time during DPD parameter updates. This segmentation allows the system to maintain processing capability while significantly reducing the number of simultaneously operating high-power components.
Solution Approach 2:
The patent introduces a separate observation receiver that copies the essential DPD parameter update function from the main receiver. This dedicated observation receiver handles the computationally intensive DPD updates, allowing the main receiver's ADCs to be deactivated or operated at lower power during these operations.
2Productivity
If multiple ADCs operate simultaneously at high speed, then signal processing capability is sufficient, but device cost increases
Solution Approach 1:
By segmenting the ADC operation into temporal phases and spatial groups, the system achieves sufficient signal processing capability with fewer simultaneously active ADCs, reducing the total number of high-speed ADCs required and thereby lowering device cost.
Solution Approach 2:
The observation receiver acts as an intermediary that handles the DPD parameter update processing, allowing the main receiver to use fewer or lower-speed ADCs while maintaining overall system performance through the coordinated operation of both receivers.
Data Source
AI summary
A communication device includes a transmitter that, in a first operation, distorts an input signal through a digital predistortion unit, converts the distorted input signal into an analog signal, performs frequency up-conversion on the converted analog signal to generate a first signal, amplifies the generated first signal through a power amplifier, and couples the amplified first signal; a receiver that, in the first operation, receives the coupled first signal from the transmitter, performs frequency down-conversion on the coupled first signal so as to generate a second signal, and converts the generated second signal into a digital signal through one or more analog-to-digital converters that are turned on, among a plurality of analog-to-digital converters; and a processor that, in the first operation, causes one or more of the plurality of analog-to-digital converters to be turned on and a remainder of the plurality of analog-to-digital converters to be turned off.