Wireless Device Mismatch Correction via Shared Receiver Path
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Solution Overview
Problem
Conventional wireless devices face complexity in implementing digital signal processing due to the need for customized hardware-specific methods, and there is a challenge in efficiently compensating for in-band interference and power amplifier noise in 5G wireless communications systems.
Innovation Solution
The implementation of a coefficient calculator that utilizes feedback signals to determine the efficiency of digital pre-mismatch (DPM) and digital pre-distortion (DPD) filters, which are used to compensate for in-phase/quadrature (I/Q) imbalance and nonlinear power amplifier noise, leveraging a time division duplexing (TDD) configured radio frame to share a single receiver path for both feedback and signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate receiver paths are used for feedback and signal processing, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the feedback receiver path and the signal processing receiver path into a single shared receiver path. The coefficient calculator uses feedback signals processed through this shared path to determine DPM and DPD filter coefficients, eliminating the need for separate dedicated receiver hardware while maintaining processing reliability.
Solution Approach 2:
The single receiver path is designed to serve multiple functions: it processes both the feedback signals needed for coefficient calculation and the actual wireless transmission signals. This multi-functional design reduces hardware complexity while ensuring that the receiver can reliably handle different signal types through the same physical path.
2Manufacturing precision
If customized hardware-specific signal processing methods are implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent changes the approach from hardware-specific customization to parameter-based configuration. The coefficient calculator determines filter coefficients based on measured feedback signal characteristics, allowing the system to adapt to different hardware implementations through parameter adjustment rather than requiring customized hardware designs for each signal processing scenario.
Solution Approach 2:
The system uses feedback signals from the wireless transmission process to calculate optimal filter coefficients. This feedback mechanism allows the system to automatically adapt to hardware-specific characteristics and environmental conditions, achieving precise signal processing without requiring pre-customized hardware for each specific case.
3Measurement precision
If multiple dedicated receiver paths are used for feedback and signal processing, then measurement precision is improved, but board space increases
Solution Approach 1:
The patent merges multiple receiver paths into a single shared path, reducing board space requirements. The same receiver hardware is used to process both feedback signals for coefficient calculation and actual transmission signals, eliminating the need for separate dedicated receiver components that would consume additional board real estate.
Solution Approach 2:
The single receiver path is designed with multi-functionality to handle both feedback signal measurement and transmission signal processing. This universal design maintains measurement precision for feedback signals while avoiding the board space penalty of implementing separate dedicated receiver paths.
Data Source
AI summary
Systems, methods, and apparatuses for wireless communication are described. Input data for in-phase branch/quadrature branch (I/Q) imbalance or mismatch may be compensated for or non-linear power amplifier noise may be used to generate compensated input data. In some examples, a transmitter may be configured to transmit communications signaling via a first antenna, the transmitter including a filter configured for digital mismatch correction; a receiver may be configured to receive communications signaling via a second antenna; and a switch may be configured to selectively activate a first switch path to couple the transmitter and the first antenna and a second switch path to couple the receiver and the transmitter to provide communications signaling received via the transmitter as feedback for the filter through the receiver.