Signal Reception via Windowed Resource Block Selection
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Solution Overview
Problem
Severe spectrum leakage occurs when non-OFDM signals, such as GSM, share a spectrum with OFDM signals like LTE, leading to interference and reduced receiving performance in multi-standard spectrum sharing scenarios.
Innovation Solution
The method involves replicating the time-domain signal into multiple time-domain signals, each shaped with a window function of different lengths, converting them into frequency-domain signals, and selecting and arranging resource blocks (RBs) based on their interference characteristics to minimize interference and optimize signal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-standard spectrum sharing is used to improve spectrum resource utilization, then spectrum utilization is improved, but severe spectrum leakage occurs causing interference and reduced receiving performance
Solution Approach 1:
The patent segments the frequency-domain signal into multiple resource blocks (RBs) and processes them differently based on their spectral characteristics. By dividing the signal into manageable RB units, the system can apply selective filtering and windowing operations to suppress spectrum leakage in specific frequency regions while maintaining overall signal integrity and spectrum sharing capability.
Solution Approach 2:
The patent applies different window functions and filtering operations to different resource blocks based on their local spectral characteristics. RBs experiencing severe spectrum leakage are processed with appropriate windowing functions, while RBs with good spectral containment are processed differently. This localized processing optimizes interference suppression without unnecessarily degrading signal quality across the entire spectrum.
2Device complexity
If a single window function is used for signal processing, then processing complexity is reduced, but interference suppression performance is insufficient
Solution Approach 1:
The patent changes the parameters of window functions (such as window length, shape, and application position) based on the spectral characteristics of different resource blocks. By dynamically adjusting window function parameters rather than using a fixed single window function, the system achieves better interference suppression performance while managing processing complexity through parameter optimization rather than structural complexity.
Data Source
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AI summary
Embodiments of this application disclose a signal receiving method, apparatus, and device. The method includes: receiving a time-domain signal sent by a sending device; replicating the time-domain signal to obtain N time-domain signals; configuring N window functions, where the N window functions are in a one-to-one correspondence with the N time-domain signals; performing an operation on each of the N time-domain signals based on a corresponding window function to obtain N windowed time-domain signals; separately converting the N windowed time-domain signals to obtain N frequency-domain signals; determining an RB corresponding to an interference frequency; selecting several RBs from each of the N frequency-domain signals; and arranging the selected RBs in sequence based on indexes to obtain a target frequency-domain signal. According to the technical solutions in the embodiments of this application, in a scenario in which signals of a plurality of standards share a spectrum and a signal of at least one standard uses an OFDM transmission technology, interference caused by spectrum leakage can be effectively suppressed, thereby optimizing signal receiving performance.