FBMC Receiver Interference Attenuation via Banded Channel Matrix
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Solution Overview
Problem
The FBMC wireless communication system experiences interference due to multipath fading and overlapping symbol structures, leading to deteriorated reception performance, especially in the absence of cyclic prefix (CP), which existing 1-tap equalizers cannot effectively address.
Innovation Solution
A receiver apparatus and method that includes a signal extractor, channel estimator, interference channel matrix recovering unit, bended channel reconfiguration unit, and interference attenuator to separate and attenuate interference, reconfiguring the channel matrix to a banded form using diagonal and non-diagonal components, and utilizing filter information to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If FBMC system uses overlapping symbol structure without cyclic prefix to increase symbol transmission rate, then productivity is improved, but interference from adjacent symbols occurs causing reception performance to deteriorate
Solution Approach 1:
The patent extracts and separately processes interference components from the received signal. The receiver identifies and isolates interference from adjacent symbols, then removes it through separate equalization processing, allowing the main signal to be recovered without interference contamination
Solution Approach 2:
The patent segments the channel matrix into banded structure where diagonal elements represent desired symbols and off-diagonal elements represent interference from adjacent symbols. This segmentation allows targeted processing of interference components while preserving the main signal path
2Productivity
If FBMC system transmits data at high speed beyond 4G requirements, then productivity is improved, but interference cancellation capability is needed to maintain reliability
Solution Approach 1:
The patent performs preliminary channel estimation and interference identification before final signal recovery. By pre-processing the received signal to identify interference patterns and channel characteristics, the system prepares cancellation parameters in advance, enabling reliable high-speed data recovery
Solution Approach 2:
The patent uses feedback mechanisms where the receiver estimates channel conditions and interference levels, then adjusts equalization parameters accordingly. The processed signal information feeds back into the interference cancellation process to iteratively improve reception accuracy at high transmission speeds
Data Source
AI summary
This disclosure relates to a 5G or a pre-5G communication system to be provided to support a higher data rate following 4G communication systems such as LTE. A method according to one embodiment of the present invention is a method for attenuating interference of a signal received in a receiver of a filter bank multicarrier (FBMC) system, the method comprising the steps of: separately extracting data and a reference signal in a received FMBC symbol; obtaining a diagonal element channel of a desired symbol through a channel estimation from the extracted reference signal; generating an interference channel matrix of a non-diagonal component of the desired symbol, a diagonal component and a non-diagonal component of an interference symbol using a channel estimated diagonal component; reconfiguring to a banded channel matrix using an interference channel matrix; and attenuating the interference contained in the extracted data using the reconfigured banded channel matrix information and filter information of a transmitter of the filter bank multicarrier system.