FBMC Pre-Equalization for Tail Effect Mitigation
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Solution Overview
Problem
Filter Bank Multiple Carrier (FBMC) modulation techniques face challenges in 5G communication systems due to the long tail effect in time domain waveforms, which reduces spectrum efficiency in IoT scenarios and causes interference, and existing methods to address this issue, such as cutting off the tail, lead to signal distortion and increased Inter-Carrier-Interference (ICI).
Innovation Solution
A configurable pre-equalization processing method is introduced for FBMC systems, where pre-equalization coefficients are generated based on channel status information and applied to transmission signals to mitigate the tail effect without cutting off the waveform, thereby maximizing spectrum efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the tail of FBMC time domain waveform is cut off to avoid interference, then interference between data blocks is reduced, but signal distortion occurs and Inter-Carrier-Interference (ICI) increases
Solution Approach 1:
The patent applies pre-equalization processing before modulation to counteract the tail effect. By generating pre-equalization coefficients based on channel status information and applying them to the transmission signal before FBMC modulation, the system proactively compensates for the long tail effect, preventing interference without needing to cut off the waveform tail.
Solution Approach 2:
The system performs pre-equalization in advance before the actual data transmission. The pre-equalization coefficients are generated based on channel status information obtained before modulation, and the pre-equalization processing is applied to the signal beforehand, so that when the signal is transmitted, the tail effect is already compensated for.
2Productivity
If FBMC modulation is used to improve spectrum efficiency, then data transmission efficiency increases, but the long tail effect in time domain causes interference in IoT scenarios
Solution Approach 1:
The patent applies pre-equalization processing before modulation to counteract the tail effect. By generating pre-equalization coefficients based on channel status information and applying them to the transmission signal before FBMC modulation, the system proactively compensates for the long tail effect, preventing interference without needing to cut off the waveform tail.
3Productivity
If pre-equalization is enabled to mitigate tail effect, then spectrum efficiency is maintained under heavy network loads, but system complexity increases due to additional processing
Solution Approach 1:
The patent implements configurable pre-equalization that can be dynamically enabled or disabled based on network conditions. The system can adaptively adjust whether to apply pre-equalization processing, making the complexity manageable by only activating it when needed for heavy network loads.
Solution Approach 2:
The system changes the processing mode parameter based on network conditions. By configuring whether pre-equalization is enabled or disabled, the system can switch between different processing complexities to match the network load conditions.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A signal transmission method based on a filter bank, includes obtaining by a transmitter pre-equalization information, wherein the pre-equalization configuration information indicates whether pre-equalization is enabled, if the pre-equalization configuration information indicates that the pre-equalization is enabled, generating by the transmitter pre-equalization coefficients according to a pre-equalization manner, and performing pre-equalization operation to transmission signals according to the pre-equalization coefficients, and performing modulation based on the filter bank.