针对滤波器组多载波(Filter Bank Multicarrier,FBMC)系统的信道估计问题,对系统进行了简要介绍并提出一种基于线性最小均方误差(Liner Minimum Mean-Square Error,LMMSE)算法改进的信道估计算法。在原有的LMMSE算法基础上结合离散傅里...针对滤波器组多载波(Filter Bank Multicarrier,FBMC)系统的信道估计问题,对系统进行了简要介绍并提出一种基于线性最小均方误差(Liner Minimum Mean-Square Error,LMMSE)算法改进的信道估计算法。在原有的LMMSE算法基础上结合离散傅里叶变换(Discrete Fourier Transform,DFT)算法,并进行迭代估计,同时利用奇异值分解(Singular Value Decomposition,SVD)算法降低了计算的复杂度。仿真结果表明,改进的LMMSE算法明显提高了系统的性能。展开更多
针对滤波器组多载波(Filter Bank Multicarrier,FBMC)系统的信道估计问题,对系统进行简要介绍,并提出一种基于导频的信道估计算法。基于对导频预编码算法的改进,结合传统的预编码和干扰消除算法,在减少预编码复杂度的同时降低了误码率...针对滤波器组多载波(Filter Bank Multicarrier,FBMC)系统的信道估计问题,对系统进行简要介绍,并提出一种基于导频的信道估计算法。基于对导频预编码算法的改进,结合传统的预编码和干扰消除算法,在减少预编码复杂度的同时降低了误码率。仿真结果表明,通过算法的改进,系统性能得到相对提高,系统的复杂度也得到了改善并和传统的正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)进行了对比,结果表明改进后的算法性能更加优越。展开更多
In this paper,an analytical method based on a chemical reaction between KSCN and sodium dichloroisocyanurate-dihydrate in a buffer system was applied to quantify the total alkaloid in tobacco.The proposed method repla...In this paper,an analytical method based on a chemical reaction between KSCN and sodium dichloroisocyanurate-dihydrate in a buffer system was applied to quantify the total alkaloid in tobacco.The proposed method replaced the No.35 Recommended Method of CORESTA(CRM 35)with the advantage that this method is safer compared to the CRM35 which uses KCN,a highly toxic chemical.In addition,compared to the current national standard method YC/T 468一2013,the buffer solution preparation was optimized to improve the detection efficiency.The validation results indicated that the new method met the test requirements,and the results were consistent with the ones obtained from the CORESTA CRM 35 and the YC/T 468一2013 methods.展开更多
文摘针对滤波器组多载波(Filter Bank Multicarrier,FBMC)系统的信道估计问题,对系统进行了简要介绍并提出一种基于线性最小均方误差(Liner Minimum Mean-Square Error,LMMSE)算法改进的信道估计算法。在原有的LMMSE算法基础上结合离散傅里叶变换(Discrete Fourier Transform,DFT)算法,并进行迭代估计,同时利用奇异值分解(Singular Value Decomposition,SVD)算法降低了计算的复杂度。仿真结果表明,改进的LMMSE算法明显提高了系统的性能。
文摘针对滤波器组多载波(Filter Bank Multicarrier,FBMC)系统的信道估计问题,对系统进行简要介绍,并提出一种基于导频的信道估计算法。基于对导频预编码算法的改进,结合传统的预编码和干扰消除算法,在减少预编码复杂度的同时降低了误码率。仿真结果表明,通过算法的改进,系统性能得到相对提高,系统的复杂度也得到了改善并和传统的正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)进行了对比,结果表明改进后的算法性能更加优越。
文摘In this paper,an analytical method based on a chemical reaction between KSCN and sodium dichloroisocyanurate-dihydrate in a buffer system was applied to quantify the total alkaloid in tobacco.The proposed method replaced the No.35 Recommended Method of CORESTA(CRM 35)with the advantage that this method is safer compared to the CRM35 which uses KCN,a highly toxic chemical.In addition,compared to the current national standard method YC/T 468一2013,the buffer solution preparation was optimized to improve the detection efficiency.The validation results indicated that the new method met the test requirements,and the results were consistent with the ones obtained from the CORESTA CRM 35 and the YC/T 468一2013 methods.
