1) orthogonal function transformation
正交函数变换
2) tangent function transformation
正切函数变换
1.
Based on the tangent function transformation, a modified global base expansion method(MGBEM) is proposed.
基于正切函数变换 ,本文提出了改进型全域基展开法 (MGBEM) 。
3) regular varying function
正规变换函数
4) digital orthogonal transform
数字正交变换
1.
The design of the high speed digital orthogonal transformer which architecture based on the digital channelization in frequency domain is introduced in this paper.
介绍了一种基于频域数字信道化的高速数字正交变换器的设计方法和实现结构。
2.
An approach for designing digital-intermediate frequency(IF) receiver is introduced,the principle analysis and deduction of all parts of the receiver are performed including design of available-band filter,Analog-to-Digital Converter(ADC),digital orthogonal transforms based on digital polyphase filter,decimation filter,baseband signal processing unit.
介绍了一种数字中频接收机的设计,对接收机的各个组成部分进行了原理分析和推导,包括可变带宽滤波器、ADC、基于多相滤波器的数字正交变换、抽取滤波器设计、基带信号处理单元设计,得出样机的各样性能参数。
5) digital orthogonal transformation
数字正交变换
1.
The application of IP core-based FIR filter to digital orthogonal transformation;
基于IP核的FIR滤波器在数字正交变换中的应用
2.
This paper investigates the principle of the digital orthogonal transformation based on multiphase filtering,and proved that the interpolation delay filters could be replaced with branch filters from a multiphase filter according to the theory of multi-sampling rate signal processing.
对多相滤波法实现数字正交变换的原理进行详细的分析,用多相滤波器组中的子滤波器实现内插滤波器的设计。
6) digital quadrature transformation
数字正交变换
1.
A method & error analysis of phase difference measurement based on digital quadrature transformation;
基于数字正交变换的相位差测量方法及误差分析
2.
Structures similar to analog receiver are often applied in the design of direct IF sampling,however,the digital quadrature transformation based on polyphase structure does not need quadrature LO,therefore,it’s more suitable for real-time processing system in terms of structure.
直接中频采样的设计通常采用类似模拟接收机的结构,而基于多相结构的数字正交变换无需正交本振,结构上更适用于实时处理系统。
3.
In order to implement processing functions of receiver in communication and radar systems by software as far as possible, it is necessary to use the direct IF sampling and digital quadrature transformation to obtain baseband inphase and quadrature components.
为了尽可能多地用软件来实现通信和雷达接收机的处理功能,需要直接对中频信号进行采样,然后通过数字正交变换的方法得到同相和正交分量。
补充资料：正切函数
形式是y=tanx,是直角三角形两条直角边的比值.
它是区别于正弦函数的又一三角函数,它与正弦函数的最大区别是定义域的不连续性.
正切函数是周期函数,正切函数的周期为π,是奇函数.
正切曲线除了原点是它的对称中心以外,实际上所有点都是它的对称中心.
正切函数性质：
正切函数
图象：如图
定义域：{x|x≠(π/2)+kπ,k∈z}
值域：r
最值：无最大值与最小值
零值点：(kπ,0)
对称性：
轴对称：无对称轴
中心对称：关于点(kπ,0)对称
周期：π
奇偶性：奇函数
单调性：在(-π/2+kπ,π/2+kπ)上都是增函数
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条