1) I/Q sub-sampling
正交欠采样
1.
Based on analysis of the traditional carrier recovery loop,using I/Q sub-sampling technique,this work presented a receiver architecture based on all digital carrier recovery loop using coordinate rotation digital computer(CORDIC) algorithm.
在分析已有载波恢复方法的基础上,采用正交欠采样技术,提出了一种基于CORDIC算法的全数字载波恢复环接收机结构。
2) quadrature sampling
正交采样
1.
In this paper, three bandpass digital quadrature sampling are discussed, based on discrete lowpass filter, Hil-bert transform and discrete Fourier transform.
带通信号的正交采样与处理是在对带通信号进行A/D变换后直接利用数字信号处理算法进行相干检波。
2.
Signals can be sampled with A/D converter module embedded PIC single chip and a quadrature sampling approach is adopted to process data and measure RLC parameter.
该测量仪利用PIC单片机内置的A/D转换模块对信号进行采样,并采用正交采样算法对数据进行处理从而得出待测元件的参数值。
3.
A high-efficiency algorithm realizing quadrature sampling and pulse compression through frequency domain is presented to obviously reduce the amount of computation and improve the speed and real-time performance of radar signal processing.
针对雷达信号处理中数字正交采样和脉冲压缩的大运算量问题,提出了用频域方法把正交采样和脉冲压缩结合实现的高效算法,大大减少了运算量,提高了雷达信号处理的吞吐率和实时性。
3) undersampling
欠采样
1.
Uniform undersampling technique of bandpass signal and its engineering application in software digital IF receiver;
带通欠采样技术及在数字中频软件接收机中的工程应用
2.
Project of Convex Set Method for Reconstructing A Super-resolution Image from Multiframe Undersampling Images;
一种多幅欠采样图像的凸集投影超分辨率重建方法
3.
Application of bandpass undersampling principle in software radio;
带通欠采样定理在软件无线电中的应用
4) sub-sampling
欠采样
1.
Time-delay estimation for sub-sampling sinusoidal signals;
欠采样条件下的正弦信号时差估计
2.
In order to break through the limitation of Electronic analog-to-digital converter in speed and time-delay precision,a wideband digital frequency measurement method based on optical sub-sampling is proposed.
为了突破高速电模数转换器采样速率和时延控制精度对测频带宽的限制,文中提出了一种采用光脉冲欠采样的超宽带、高分辨率数字测频方法。
3.
In the algorithm for estimation of frequency of ultra-wideband LFM signal based on multi-channel and sub-sampling,even tiny error of the remainder can lead to huge error of the frequency.
针对基于多速率欠采样的超宽带LFM信号瞬时频率估计方法中,余数的很小测量误差将导致很大的测频误差问题,提出一种基于欠采样的超宽带LFM信号参数估计算法。
5) under-sampling
欠采样
1.
According to the characteristics of the wayside frequency-shift signal spectrum,and based on a great number of computer emulators and real-time experiments and on non-complete periods sampling,the feasibility of applying the under-sampling technology to the real-time FFT analytical method of tramroad FSK signal is validated.
针对轨道移频信号的频谱特点,采用欠采样技术对轨道移频信号进行非整周期的采样,经过计算机仿真实验,验证了基于非整周期采样方法对轨道移频信号进行实时傅里叶变换(FFT)分析检测的可行性,证明采样方法满足检测指标的要求。
2.
Based on the theoretic modeling and analysis of the IF GPS signals,an accurate software simulator of IF GPS signals is implemented in Matlab/Simulink,the effects of noise,under-sampling and receiver clock error are also simulated.
在对中频GPS信号理论建模与分析的基础上,采用Matlab/Simulink构建了一种精确的数字中频GPS信号软件模拟器,考虑了噪声、欠采样以及接收机时钟误差等的影响。
3.
The theoretical analysis has proved that in the condition of under-sampling, because the paired echoes will be appeared, the system’s multi-object resolution will be affected.
理论分析证明:在欠采样情况下,脉冲压缩后会出现成对回波,因而系统的多目标分辨能力受到影响;由于信号带宽的损失,脉压输出回波信号的主瓣展宽,距离分辨力下降;另外,主瓣幅度或相位还会受到调制。
6) sub-Nyquist sampling
欠采样
1.
Using Different Frequencies Method to Solve Bandpass sub-nyquist sampling;
欠采样信号多采样频率处理方法
2.
In view of the present sub-Nyquist sampling frequency estimation method,in order to overcome the existing problems such as complex arithmetic and difficult to engineer realizing,the paper puts forward a three-sample rates switching frequency estimation method based in virtual instruments.
为了克服现有的欠采样频率估计方法存在的算法复杂、工程实现困难等问题,本文提出了一种基于虚拟仪器的三采样率切换的频率估计方法。
3.
Based on an auxiliary time-delay channel and ESPRIT approach,a new algorithm for wide band frequency estimation with sub-Nyquist sampling was proposed.
基于时延和旋转不变子空间技术 (ESPRIT) ,本文提出了一种新的欠采样宽频带信号频率的高分辨估计方法 。
补充资料：Fourier级数(关于正交多项式的)
Fourier级数(关于正交多项式的)
rthogonal polynomials) Fourier series (in
F血的er级数(关于正交多项式的)【I饭的er sedes(加川如卿.1州ylm血‘);。”晓p，八(no opTOroHa‘-眼M，。oro呱。aM)] 形式为 艺。。p。(l) 月之0的级数，其中{尸。}是在区间(a，b)上关于权函数h正交的多项式系(见正交多项式(ort加即间即妙-no而alS))，系数{。。}由公式 b a。一J儿(*)f(*)尸。〔二)、(2)给出.这里，f属于函数类L:=L之f(a，b)，h]，即它的平方在正交性区间(a，b)上关于权函数h可和(玫比g比可积). 对任意正交级数，(l)的部分和{s。(x，f)}是f的依L:度量的最佳逼近，且a，满足条件 浊a。=0·(3)在证明级数(l)在一个点x或在(a，b)中的某个集合上收敛时，通常利用等式f(x)一s。(戈，f)=拜。汇a。(甲二)只十;一a。+:(价二)只(x)l，其中{a。(叭)}是辅助函数毋二的Founer系数，对于固定的x， 川门=力匕2二丛兰上.。。(。.bl. X一汇而拼。是由Cll南.川回{抽均.以公式(Ch由toffel一Dar·boux fonn“巨)给出的系数.如果正交性区间[a，b]有限，毋乒几且序列笼只圣在给定的点x有界，则级数(l)收敛到值f(x). 对于f6L一L:l(a，b)，h」，即在区间(a，b)上关于权函数h可和的函数类，也可定义系数(2).对有限区间!a，b]，如果f“L，【(a，b)，hl且序列{凡}在整个区间[a，b]上一致有界，则条件(3)成立.在这些条件下，在点x可a，bJ处如果叭〔L，I(a，b)，h]，则级数(l)收敛到值f(x). 设A是区间(a，b)中的某个集合，序列王尸。}在A上一致有界，设B=[a，b〕\A，记L，(A)‘L，【A，川是在A上关于权函数h的p次可和的函数类.如果对固定的x已Al，有叭任L，(A)及叭。
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