Multi-Channel Signal Correction for Non-Ideal Channel Errors
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Solution Overview
Problem
Existing correction methods for non-ideal channels in communication circuits are inefficient due to direct signal correction on a single channel, failing to accurately account for differences between channels, leading to suboptimal accuracy and efficiency in signal correction.
Innovation Solution
A correction apparatus and method that decompose the circuit into a drive channel and multiple non-ideal channels, using separate adjustment modules to correct error values, with a correction calculation module obtaining and outputting specific adjustment parameters to each channel to address unique error factors such as nonlinearity, IQ imbalance, and channel delay errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a correction circuit is disposed between an input end of a single signal channel and each non-ideal channel to perform correction calculation, then the circuit can output a normal signal by adjusting the global circuit, but the accuracy and efficiency of correction are not high because differences between non-ideal channels are not considered
Solution Approach 1:
The correction apparatus is segmented into a correction calculation module and multiple correction units, where each correction unit corresponds to a specific non-ideal channel. The correction calculation module obtains first correction parameters for global adjustment and second correction parameters for individual channel adjustment, enabling differentiated correction that considers channel-specific differences while maintaining overall system coordination.
Solution Approach 2:
The patent implements local quality by providing individual correction units for each non-ideal channel, where each correction unit applies channel-specific second correction parameters obtained from the correction calculation module. This allows each channel to receive customized correction tailored to its specific characteristics (nonlinearity, IQ imbalance, delay errors), rather than applying a uniform correction to all channels.
2Device complexity
If direct signal correction is performed on the single signal channel without considering channel differences, then the correction process is simplified, but the accuracy of signal correction deteriorates
Solution Approach 1:
The correction system is divided into a central correction calculation module and distributed correction units. Each correction unit is responsible for a specific non-ideal channel and receives both first correction parameters (global) and second correction parameters (channel-specific) from the correction calculation module, enabling accurate per-channel correction without requiring complete redesign of the entire correction architecture.
Solution Approach 2:
The correction calculation module acts as an intermediary between the single signal channel and multiple non-ideal channels. It processes the input signal, generates both global first correction parameters and channel-specific second correction parameters, and distributes them to appropriate correction units, thereby coordinating the correction process across the entire system while maintaining accuracy.
Data Source
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AI summary
Embodiments of this application provide a correction apparatus and a correction method. The correction apparatus includes a first adjustment module, a plurality of second adjustment modules, a correction calculation module, and a plurality of non-ideal channels. One second adjustment module is disposed on one non-ideal channel. The first adjustment module is connected to each non-ideal channel. The correction calculation module is separately connected to the first adjustment module and the plurality of second adjustment modules. The correction calculation module is connected to an output end of each non-ideal channel. The non-ideal channel is such a channel that an output signal output in response to a drive signal has an error value. The first adjustment module uniformly corrects error values of output signals of the plurality of non-ideal channels. On each non-ideal channel, the second adjustment module performs complementary correction on an error value of an output signal of a non-ideal channel to which the second adjustment module belongs, to correct a part that is of the error value and that is not corrected by the first adjustment module. The two adjustment modules cooperate with each other, to improve efficiency of adjusting an error value of a circuit signal.