Pre-Distortion Signal Combining for Stable Frequency-Hopping Correction
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Solution Overview
Problem
Existing pre-distortion technologies have inadequate correction effects on narrowband signals and frequency hopping signals due to inconsistent amplitude-frequency characteristics and defects in the pre-distortion algorithm, leading to poor signal stability and increased jitter.
Innovation Solution
A pre-distortion processing device that combines a wideband signal with a system input signal, using a generation unit and combiner unit to create a stable input for the pre-distortion unit, which includes a filtering unit to remove spurious signals and improve the pre-distortion correction effect on narrowband and frequency hopping signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-distortion technology is applied to narrowband signals and frequency hopping signals, then the correction ability is limited, but the signal stability deteriorates and jitter increases
Solution Approach 1:
The patent combines multiple narrowband signals or frequency hopping signals into a composite wideband signal for pre-distortion processing. By merging the signals in the frequency domain and processing them together through a unified pre-distortion algorithm, the system achieves improved correction effects while maintaining signal stability that would be difficult to achieve when processing each signal separately.
2Manufacturing precision
If pre-distortion algorithm is used for frequency hopping signals, then the correction ability is insufficient, but the signal quality deteriorates
Solution Approach 1:
The patent transforms the processing parameters by converting frequency hopping signals into a wideband signal representation in the frequency domain. This parameter transformation allows the pre-distortion algorithm to operate on a unified frequency spectrum rather than attempting to track rapid frequency changes, thereby improving correction precision while maintaining signal quality.
3Adaptability or versatility
If conventional pre-distortion processing is applied to narrowband signals, then the algorithm has defects, but the linear index improvement is insufficient
Solution Approach 1:
The patent transitions the pre-distortion processing from the time domain to the frequency domain, adding a dimensional perspective to the processing approach. By representing narrowband signals as wideband signals in the frequency domain and applying pre-distortion in this transformed dimension, the algorithm achieves better adaptability and improved linearization performance that cannot be achieved with conventional time-domain processing.
Data Source
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AI summary
A pre-distortion processing device, a signal transmission system, and a pre-distortion processing method are provided. The pre-distortion processing device comprises a pre-distortion unit (101), a transmission unit (102) and a coupling unit (103) which are sequentially connected. A feedback path (104) of the coupling unit (103) is connected to the pre-distortion unit (101). The pre-distortion processing device further comprises a generation unit (105) and a combiner unit (106). The generation unit (105) is used to generate a non-hopping wideband signal having a bandwidth greater than a bandwidth of a system input signal. A first input terminal of the combiner unit (106) is connected to an output terminal of the generation unit (105). A second input terminal of the combiner unit (106) is used to receive the system input signal. An output terminal of the combiner unit (106) is connected to an input terminal of the pre-distortion unit (101).