Multi-Band Digital Predistortion for Lower-Rate Wideband Processing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently processing wideband signals due to high power consumption and heat dissipation issues caused by high sampling rates, leading to increased energy costs and reduced hardware lifespan.
Innovation Solution
Implementing multi-dimensional digital predistortion (DPD) techniques that partition wideband signals into sub-bands for processing at lower sampling rates, using a multi-band DPD kernel to reduce power consumption and energy costs while maintaining signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high sampling rates are used to process wideband signals, then signal processing quality is improved, but power consumption and heat dissipation increase
Solution Approach 1:
The patent divides the wideband signal into multiple sub-bands, each processed at a lower sampling rate. This segmentation allows the system to maintain overall signal processing quality while reducing the power consumption associated with high-rate sampling and processing of the entire wideband signal.
Solution Approach 2:
The patent transitions from a single-dimension high sampling rate approach to a multi-dimensional approach by processing different frequency sub-bands at different sampling rates. This dimensional change in the signal processing domain enables quality preservation while reducing energy consumption.
2Measurement precision
If high sampling rates are used to process wideband signals, then signal processing quality is improved, but heat dissipation increases
Solution Approach 1:
By segmenting the wideband signal into sub-bands processed at lower sampling rates, the computational load and associated heat generation are reduced while maintaining the necessary signal processing quality through coordinated processing of all sub-bands.
Solution Approach 2:
The patent employs a multi-dimensional processing strategy where different sub-bands are handled in different processing dimensions (frequency segments), reducing the thermal burden of single high-rate processing while preserving overall signal fidelity.
3Measurement precision
If high sampling rates are used to process wideband signals, then processing accuracy is maintained, but hardware lifespan is reduced
Solution Approach 1:
The patent segments the processing task into multiple lower-rate sub-band operations, reducing the stress and wear on hardware components while maintaining processing accuracy through the coordinated reconstruction of the full wideband signal from its sub-band components.
Solution Approach 2:
By changing from a single high-rate processing dimension to multiple lower-rate processing dimensions for different sub-bands, the patent reduces hardware stress and extends component lifespan while preserving the accuracy needed for wideband signal processing.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an apparatus may apply digital predistortion (DPD) to a wideband signal by splitting the wideband signal into respective distinct sub-bands, and inputting the respective distinct sub-bands to a multi-dimensional DPD apparatus. The multi-dimensional DPD apparatus may apply DPD based at least in part on using a multi-band DPD kernel that processes the respective distinct sub-bands. The multi-dimensional DPD apparatus may implement the multi-band DPD kernel as a DPD kernel set, and the DPD kernel set may be implemented using any combination of one or more envelope delay line components, one or more envelope selection components, one or more look-up-table (LUT) components, one or more computation delay line components, one or more computation selection components, one or more combiner components, and/or one or more adder components. Numerous other aspects are described.