A new cyclic prefix(CP)-based nonoverlapping FBMC-QAM(CP-NO-FBMC-QAM)system with two prototype filters is proposed in this paper,which satisfies complex orthogonality conditions and good frequency energy confinement a...A new cyclic prefix(CP)-based nonoverlapping FBMC-QAM(CP-NO-FBMC-QAM)system with two prototype filters is proposed in this paper,which satisfies complex orthogonality conditions and good frequency energy confinement at the same time.We analyze its inter-carrier interference/inter-symbol interference(ICI/ISI)over multipath channels.Owing to the additional CP,the ISI of received symbols over multipath channels is eliminated in the proposed system,and the resulting improvement in the signal-to-interference ratio(SIR)performance is evaluated by theoretical analysis.Moreover,for the ICI caused by multipath propagation in received symbols,we develop a method that eliminates the ICI by frequency-domain channel estimation and equalization before the receiver filtering process.The proposed CP-NO-FBMC-QAM system and ICI cancellation method(ICICM)are validated by comparisons of implementation complexity,power spectral density(PSD),bit error rate(BER)and channel estimation performance with conventional CP-based orthogonal frequency division multiplexing(CP-OFDM)and FBMC-QAM systems.展开更多
Quantitatively describing the signal transduction process is important for understanding the mechanism of signal regulation in cells,and thus,poses both a challenge and an opportunity for chemical and biochemical engi...Quantitatively describing the signal transduction process is important for understanding the mechanism of signal regulation in cells,and thus,poses both a challenge and an opportunity for chemical and biochemical engineers.An artificial neural network(ANN),in which we took the signal molecules as neural nodes,was constructed to simulate the generation of active oxygen species(AOS)in Taxus chinensis cells induced by a bio-elicitor.The relative contents of AOS in cells predicted by the ANN model agreed well with the experimental data and three notable stages of AOS increase were observed from the 3D figure of AOS generation.The robustness of AOS trajectories indicated that signal regula-tion in vivo was an integral feedback control model that ensured the adaptation of Taxus chinensis to environmental stress.The artificial neural network was able to predict taxol production as well as determine the optimal concentration of oligosaccharides needed for it.展开更多
文摘A new cyclic prefix(CP)-based nonoverlapping FBMC-QAM(CP-NO-FBMC-QAM)system with two prototype filters is proposed in this paper,which satisfies complex orthogonality conditions and good frequency energy confinement at the same time.We analyze its inter-carrier interference/inter-symbol interference(ICI/ISI)over multipath channels.Owing to the additional CP,the ISI of received symbols over multipath channels is eliminated in the proposed system,and the resulting improvement in the signal-to-interference ratio(SIR)performance is evaluated by theoretical analysis.Moreover,for the ICI caused by multipath propagation in received symbols,we develop a method that eliminates the ICI by frequency-domain channel estimation and equalization before the receiver filtering process.The proposed CP-NO-FBMC-QAM system and ICI cancellation method(ICICM)are validated by comparisons of implementation complexity,power spectral density(PSD),bit error rate(BER)and channel estimation performance with conventional CP-based orthogonal frequency division multiplexing(CP-OFDM)and FBMC-QAM systems.
基金financial support from the National Natural Science Foundation of China(Grant No.20236040)the National Fund for Distinguished Young Scholars(Grant No.20425620)the Program for Changjiang Scholars and Innovative Research Team in University from the Ministry of Education of China.
文摘Quantitatively describing the signal transduction process is important for understanding the mechanism of signal regulation in cells,and thus,poses both a challenge and an opportunity for chemical and biochemical engineers.An artificial neural network(ANN),in which we took the signal molecules as neural nodes,was constructed to simulate the generation of active oxygen species(AOS)in Taxus chinensis cells induced by a bio-elicitor.The relative contents of AOS in cells predicted by the ANN model agreed well with the experimental data and three notable stages of AOS increase were observed from the 3D figure of AOS generation.The robustness of AOS trajectories indicated that signal regula-tion in vivo was an integral feedback control model that ensured the adaptation of Taxus chinensis to environmental stress.The artificial neural network was able to predict taxol production as well as determine the optimal concentration of oligosaccharides needed for it.
