Quantization noise caused by analog-to-digital converter(ADC)gives rise to the reliability performance degradation of communication systems.In this paper,a quantized non-Hermitian symmetry(NHS)orthogonal frequency-div...Quantization noise caused by analog-to-digital converter(ADC)gives rise to the reliability performance degradation of communication systems.In this paper,a quantized non-Hermitian symmetry(NHS)orthogonal frequency-division multiplexing-based visible light communication(OFDM-VLC)system is presented.In order to analyze the effect of the resolution of ADC on NHS OFDM-VLC,a quantized mathematical model of NHS OFDM-VLC is established.Based on the proposed quantized model,a closed-form bit error rate(BER)expression is derived.The theoretical analysis and simulation results both confirm the effectiveness of the obtained BER formula in high-resolution ADC.In addition,channel coding is helpful in compensating for the BER performance loss due to the utilization of lower resolution ADC.展开更多
A novel wrist-inspired soft actuator,which is driven by a magneto-pneumatic hybrid system and based on a Kresling origami unit,is proposed.The geometric model,kinematic analysis model,and quasistatic analysis model of...A novel wrist-inspired soft actuator,which is driven by a magneto-pneumatic hybrid system and based on a Kresling origami unit,is proposed.The geometric model,kinematic analysis model,and quasistatic analysis model of the Kresling origami unit are presented.A key focus is on the formulation and investigation of the variation in rotation angle using the kinematic analysis model.A wrist-inspired soft actuator is designed,and its quasistatic characteristics are validated through various experiments.The paper proposes an innovative magneto-pneumatic hybrid actuation method,capable of achieving bidirectional torsion.This actuation method is experimentally validated,demonstrating the actuator's ability to maintain 3 steady states and its capability for bidirectional torsion deformation.Furthermore,the paper highlights the potential of the Kresling origami unit in designing soft actuators capable of achieving large rotation angles.For instance,an actuator with 6 sides(n=6)is shown to achieve a rotation angle of 239.5°,and its rotation ratio exceeds 277°,about twice the largest one reported in other literature.The actuator offers a practical and effective solution for bidirectional torsion deformation in soft robotic applications.展开更多
基金supported by the National Natural Science Foundation of China(No.62201508)the Zhejiang Provincial Natural Science Foundation of China(Nos.LZ21F010001 and LQ23F010004)the State Key Laboratory of Millimeter Waves of Southeast University,China(No.K202212).
文摘Quantization noise caused by analog-to-digital converter(ADC)gives rise to the reliability performance degradation of communication systems.In this paper,a quantized non-Hermitian symmetry(NHS)orthogonal frequency-division multiplexing-based visible light communication(OFDM-VLC)system is presented.In order to analyze the effect of the resolution of ADC on NHS OFDM-VLC,a quantized mathematical model of NHS OFDM-VLC is established.Based on the proposed quantized model,a closed-form bit error rate(BER)expression is derived.The theoretical analysis and simulation results both confirm the effectiveness of the obtained BER formula in high-resolution ADC.In addition,channel coding is helpful in compensating for the BER performance loss due to the utilization of lower resolution ADC.
基金supported by the National Natural Science Foundation of China(Grant Nos.91748209 and 11402229)the specialized research projects of Huanjiang Laboratory.
文摘A novel wrist-inspired soft actuator,which is driven by a magneto-pneumatic hybrid system and based on a Kresling origami unit,is proposed.The geometric model,kinematic analysis model,and quasistatic analysis model of the Kresling origami unit are presented.A key focus is on the formulation and investigation of the variation in rotation angle using the kinematic analysis model.A wrist-inspired soft actuator is designed,and its quasistatic characteristics are validated through various experiments.The paper proposes an innovative magneto-pneumatic hybrid actuation method,capable of achieving bidirectional torsion.This actuation method is experimentally validated,demonstrating the actuator's ability to maintain 3 steady states and its capability for bidirectional torsion deformation.Furthermore,the paper highlights the potential of the Kresling origami unit in designing soft actuators capable of achieving large rotation angles.For instance,an actuator with 6 sides(n=6)is shown to achieve a rotation angle of 239.5°,and its rotation ratio exceeds 277°,about twice the largest one reported in other literature.The actuator offers a practical and effective solution for bidirectional torsion deformation in soft robotic applications.
