In order to reduce the intrinsic interference of the filter bank multicarrier-quadrature amplitude modulation(FBMC-QAM)system,a novel filter optimization scheme based on discrete prolate spheroidal sequences(DPSS)is p...In order to reduce the intrinsic interference of the filter bank multicarrier-quadrature amplitude modulation(FBMC-QAM)system,a novel filter optimization scheme based on discrete prolate spheroidal sequences(DPSS)is proposed.Firstly,a prototype filter function based on DPSS is designed,since the eigenvalue can be used as an indicator of the energy concentration of DPSS,so a threshold is set,and the sequence with the most concentrated energy is selected under the threshold,that is,the sequence with the eigenvalue higher than the threshold,and the prototype filter function is rewritten as a weighted sum function of multiple eigenvectors.Under the energy constraints of the filter,the relationship between the eigenvectors and the intrinsic interference function is established,and the function problem is transformed into an optimization problem for the weighted coefficients.Through the interior point method,the most suitable weight is found to obtain the minimum intrinsic interference result.Theoretical analysis and simulation results show that compared with the prototype filters such as Type1 and CaseC,the DPSS filter applying the proposed optimization algorithm can effectively suppress the intrinsic interference of the system and obtain a better bit error rate(BER)performance.展开更多
An interference suppression design scheme based on conjugate weighted butterfly interleaving mapping(CWBIM)is proposed for inter-carrier interference(ICI)and inter-subband interference(IBI)in the received signals of u...An interference suppression design scheme based on conjugate weighted butterfly interleaving mapping(CWBIM)is proposed for inter-carrier interference(ICI)and inter-subband interference(IBI)in the received signals of universal filtered multi-carrier(UFMC)systems.It applies an interleaving mapping operation to subtract the interference coefficients of adjacent terms in ICI and IBI twice,thereby achieving suppression effects similar to the self-cancellation(SC)algorithm while maintaining the original data transmission efficiency.Meanwhile,conjugate and complex weighting operations can effectively suppress the impact of phase rotation errors in high-speed mobile channel environments,thereby further improving the bit error rate(BFR)performance of the system,Moreover,butterfly operation can effectively control the computational complexity of the interleaving mapping process.Theoretical analysis and simulation results show that,compared with the PSC-UFMC algorithm,the CWBIM-UFMC scheme proposed in this paper can effectively suppress ICI and IBI in the received signal without compromising data transmission efficiency and reducing computational complexity,thereby achieving good BER performance of the system.展开更多
Filter bank multicarrier quadrature amplitude modulation(FBMC-QAM)will encounter inter-ference and noise during the process of channel transmission.In order to suppress the interference in the communication system,cha...Filter bank multicarrier quadrature amplitude modulation(FBMC-QAM)will encounter inter-ference and noise during the process of channel transmission.In order to suppress the interference in the communication system,channel equalization is carried out at the receiver.Given that the con-ventional least mean square(LMS)equilibrium algorithm usually suffer from drawbacks such as the inability to converge quickly in large step sizes and poor stability in small step sizes when searching for optimal weights,in this paper,a design scheme for adaptive equalization with dynamic step size LMS optimization is proposed,which can further improve the convergence and error stability of the algorithm by calling the Sigmoid function and introducing three new parameters to control the range of step size values,adjust the steepness of step size,and reduce steady-state errors in small step sta-ges.Theoretical analysis and simulation results demonstrate that compared with the conventional LMS algorithm and the neural network-based residual deep neural network(Res-DNN)algorithm,the adopted dynamic step size LMS optimization scheme can not only obtain faster convergence speed,but also get smaller error values in the signal recovery process,thereby achieving better bit error rate(BER)performance.展开更多
目的探究全麻(GA)联合胸椎旁神经阻滞(TPVB)对肺癌手术患者术后镇痛和肺部感染的影响。方法接受胸腔镜下肺叶切除术的170例肺癌患者按用药方案分为GA组80例与GA联合TPVB组(联合组)90例。比较2组术中麻醉药物使用量,术后镇痛泵按压次数,...目的探究全麻(GA)联合胸椎旁神经阻滞(TPVB)对肺癌手术患者术后镇痛和肺部感染的影响。方法接受胸腔镜下肺叶切除术的170例肺癌患者按用药方案分为GA组80例与GA联合TPVB组(联合组)90例。比较2组术中麻醉药物使用量,术后镇痛泵按压次数,麻醉诱导前、麻醉诱导后及术毕舒张压(DBP)、收缩压(SBP)、心率(HR),术后48 h内疼痛视觉模拟评分(VAS)评估疼痛情况;酶联免疫吸附试验检测2组手术前后白细胞介素(IL)-6、肿瘤坏死因子-α(TNF-α)、IL-8水平;比较2组术后恢复时间、肺部感染和麻醉不良反应发生率。结果联合组术中瑞芬太尼、丙泊酚使用量,术后镇痛泵按压次数低于GA组(P<0.05);联合组麻醉诱导后及术毕DBP、SBP、HR高于GA组(P<0.05);联合组术后4、8、12、24、48 h VAS评分低于GA组(P<0.05);联合组术后IL-6、TNF-α、IL-8水平低于GA组(P<0.05);联合组术后自主呼吸恢复、拔管、苏醒室留置、术后首次下床、住院时间低于GA组(P<0.05);联合组术后肺部感染和麻醉不良反应发生率低于GA组(P<0.05)。结论肺癌手术患者麻醉应用GA联合TPVB术后镇痛效果优异,有助于降低患者术后肺部感染发生率。展开更多
针对5G移动通信中的通用滤波多载波(universal filtered multi-carrier,UFMC)系统中信号的峰均比(peak-to-average power ratio,PAPR)较高的问题,提出了一种改进二进制离散粒子群优化的免疫规划的部分传输序列算法(IPA-IBPSO-PTS)。该...针对5G移动通信中的通用滤波多载波(universal filtered multi-carrier,UFMC)系统中信号的峰均比(peak-to-average power ratio,PAPR)较高的问题,提出了一种改进二进制离散粒子群优化的免疫规划的部分传输序列算法(IPA-IBPSO-PTS)。该算法在IBPSO-PTS算法的基础上,采用差分算法中的变异来避免其在迭代搜索后期出现种群多样性丢失的问题,同时引入了新型免疫规划算法中的疫苗接种和免疫选择操作,进一步提升算法的全局收敛速度。理论分析和仿真表明,提出的IPA-IBPSO-PTS算法能够获得更好的PAPR抑制性能,有效地降低了军事移动通信系统的复杂度和误码率。展开更多
A correlation overlapping partial transmit sequence(C-OPTS) algorithm is proposed to solve the issue of high complexity of overlapping partial transmit sequence(OPTS) algorithm in suppressing the peak to average power...A correlation overlapping partial transmit sequence(C-OPTS) algorithm is proposed to solve the issue of high complexity of overlapping partial transmit sequence(OPTS) algorithm in suppressing the peak to average power ratio(PAPR) of filter bank multicarrier-offset quadrature amplitude modulation(FBMC-OQAM) signals.The V subblocks in partial transmit sequence(PTS) are regrouped into U combinations according to the correlation coefficient p,and overlapping subblocks are allowed between adjacent groups.The search starts from the first group and sets the phase factors of the subsequent groups to 1.When the phase factors of the non-overlapping subblocks in the first group are determined,the subsequent groups are searched in turn to determine their respective phase factors.Starting from the second data block,the data overlapped with it should be taken into account when determining its optimal phase factor vector.Theoretical analysis and simulation results indicate that compared with the OPTS algorithm,the proposed algorithm can significantly reduce the computational complexity at the cost of slight deterioration of PAPR performance.Meanwhile,compared with the even-odd iterative double-layers OPTS(ID-OPTS) algorithm,it can further reduce the complexity and obtain a better PAPR suppression effect.展开更多
基金the National Natural Science Foundation of China(No.61601296,61201244)the Science and Technology Innovation Action Plan Project of Shanghai Science and Technology Commission(No.20511103500)the Talent Program of Shanghai University of Engineering Science(No.2018RC43)。
文摘In order to reduce the intrinsic interference of the filter bank multicarrier-quadrature amplitude modulation(FBMC-QAM)system,a novel filter optimization scheme based on discrete prolate spheroidal sequences(DPSS)is proposed.Firstly,a prototype filter function based on DPSS is designed,since the eigenvalue can be used as an indicator of the energy concentration of DPSS,so a threshold is set,and the sequence with the most concentrated energy is selected under the threshold,that is,the sequence with the eigenvalue higher than the threshold,and the prototype filter function is rewritten as a weighted sum function of multiple eigenvectors.Under the energy constraints of the filter,the relationship between the eigenvectors and the intrinsic interference function is established,and the function problem is transformed into an optimization problem for the weighted coefficients.Through the interior point method,the most suitable weight is found to obtain the minimum intrinsic interference result.Theoretical analysis and simulation results show that compared with the prototype filters such as Type1 and CaseC,the DPSS filter applying the proposed optimization algorithm can effectively suppress the intrinsic interference of the system and obtain a better bit error rate(BER)performance.
基金Supported by the National Natural Science Foundation of China(No.61601296,61701295)the Science and Technology Innovation ActionPlan Project of Shanghai Science and Technology Commission(No.20511103500)the Talent Program of Shanghai University of Engineer-ing Science(No.2018RC43)。
文摘An interference suppression design scheme based on conjugate weighted butterfly interleaving mapping(CWBIM)is proposed for inter-carrier interference(ICI)and inter-subband interference(IBI)in the received signals of universal filtered multi-carrier(UFMC)systems.It applies an interleaving mapping operation to subtract the interference coefficients of adjacent terms in ICI and IBI twice,thereby achieving suppression effects similar to the self-cancellation(SC)algorithm while maintaining the original data transmission efficiency.Meanwhile,conjugate and complex weighting operations can effectively suppress the impact of phase rotation errors in high-speed mobile channel environments,thereby further improving the bit error rate(BFR)performance of the system,Moreover,butterfly operation can effectively control the computational complexity of the interleaving mapping process.Theoretical analysis and simulation results show that,compared with the PSC-UFMC algorithm,the CWBIM-UFMC scheme proposed in this paper can effectively suppress ICI and IBI in the received signal without compromising data transmission efficiency and reducing computational complexity,thereby achieving good BER performance of the system.
基金the National Natural Science Foundation of China(No.61601296,61701295)the Science and Technology Innovation Action Plan Project of Shanghai Science and Technology Commission(No.20511103500)the Talent Program of Shanghai University of Engineering Science(No.2018RC43).
文摘Filter bank multicarrier quadrature amplitude modulation(FBMC-QAM)will encounter inter-ference and noise during the process of channel transmission.In order to suppress the interference in the communication system,channel equalization is carried out at the receiver.Given that the con-ventional least mean square(LMS)equilibrium algorithm usually suffer from drawbacks such as the inability to converge quickly in large step sizes and poor stability in small step sizes when searching for optimal weights,in this paper,a design scheme for adaptive equalization with dynamic step size LMS optimization is proposed,which can further improve the convergence and error stability of the algorithm by calling the Sigmoid function and introducing three new parameters to control the range of step size values,adjust the steepness of step size,and reduce steady-state errors in small step sta-ges.Theoretical analysis and simulation results demonstrate that compared with the conventional LMS algorithm and the neural network-based residual deep neural network(Res-DNN)algorithm,the adopted dynamic step size LMS optimization scheme can not only obtain faster convergence speed,but also get smaller error values in the signal recovery process,thereby achieving better bit error rate(BER)performance.
文摘目的探究全麻(GA)联合胸椎旁神经阻滞(TPVB)对肺癌手术患者术后镇痛和肺部感染的影响。方法接受胸腔镜下肺叶切除术的170例肺癌患者按用药方案分为GA组80例与GA联合TPVB组(联合组)90例。比较2组术中麻醉药物使用量,术后镇痛泵按压次数,麻醉诱导前、麻醉诱导后及术毕舒张压(DBP)、收缩压(SBP)、心率(HR),术后48 h内疼痛视觉模拟评分(VAS)评估疼痛情况;酶联免疫吸附试验检测2组手术前后白细胞介素(IL)-6、肿瘤坏死因子-α(TNF-α)、IL-8水平;比较2组术后恢复时间、肺部感染和麻醉不良反应发生率。结果联合组术中瑞芬太尼、丙泊酚使用量,术后镇痛泵按压次数低于GA组(P<0.05);联合组麻醉诱导后及术毕DBP、SBP、HR高于GA组(P<0.05);联合组术后4、8、12、24、48 h VAS评分低于GA组(P<0.05);联合组术后IL-6、TNF-α、IL-8水平低于GA组(P<0.05);联合组术后自主呼吸恢复、拔管、苏醒室留置、术后首次下床、住院时间低于GA组(P<0.05);联合组术后肺部感染和麻醉不良反应发生率低于GA组(P<0.05)。结论肺癌手术患者麻醉应用GA联合TPVB术后镇痛效果优异,有助于降低患者术后肺部感染发生率。
文摘针对5G移动通信中的通用滤波多载波(universal filtered multi-carrier,UFMC)系统中信号的峰均比(peak-to-average power ratio,PAPR)较高的问题,提出了一种改进二进制离散粒子群优化的免疫规划的部分传输序列算法(IPA-IBPSO-PTS)。该算法在IBPSO-PTS算法的基础上,采用差分算法中的变异来避免其在迭代搜索后期出现种群多样性丢失的问题,同时引入了新型免疫规划算法中的疫苗接种和免疫选择操作,进一步提升算法的全局收敛速度。理论分析和仿真表明,提出的IPA-IBPSO-PTS算法能够获得更好的PAPR抑制性能,有效地降低了军事移动通信系统的复杂度和误码率。
基金Supported by the National Natural Science Foundation of China(No.61601296,61701295,61801286)the Major Scientific and Technological Innovation Projects in Chengdu(No.2019-YF08-00082-GX)the Talent Program of Shanghai University of Engineering Science(No.2018RC43)。
文摘A correlation overlapping partial transmit sequence(C-OPTS) algorithm is proposed to solve the issue of high complexity of overlapping partial transmit sequence(OPTS) algorithm in suppressing the peak to average power ratio(PAPR) of filter bank multicarrier-offset quadrature amplitude modulation(FBMC-OQAM) signals.The V subblocks in partial transmit sequence(PTS) are regrouped into U combinations according to the correlation coefficient p,and overlapping subblocks are allowed between adjacent groups.The search starts from the first group and sets the phase factors of the subsequent groups to 1.When the phase factors of the non-overlapping subblocks in the first group are determined,the subsequent groups are searched in turn to determine their respective phase factors.Starting from the second data block,the data overlapped with it should be taken into account when determining its optimal phase factor vector.Theoretical analysis and simulation results indicate that compared with the OPTS algorithm,the proposed algorithm can significantly reduce the computational complexity at the cost of slight deterioration of PAPR performance.Meanwhile,compared with the even-odd iterative double-layers OPTS(ID-OPTS) algorithm,it can further reduce the complexity and obtain a better PAPR suppression effect.
