The traditional differential space-time block code (DSTBC) suffers from the signal constellation expansion for QPSK modulation.
传统的差分空时分组编码(DSTBC)在QPSK调制时存在着信号星座扩展。
Relying on basis expansion model, this paper presents a differential space-time modulation method for flat rapidly fading channels.
利用基扩展模型，针对平坦快衰落信道提出了差分空时调制方法。
Different differential space are allowed to be used for different waveguide layers, while the identical one needs uniform dissection.
允许不同波导层采用不同的差分间距，但同一波导要求采用均匀剖分。
In this thesis, space-time block coding and differential space-time coding are discussed on the basis of "one-ring" correlated channel model.
本文基于一种“单环”相关信道模型，对空时分组码和差分空时码进行了分析和研究。
Based on OFDM system, a novel space-frequency-time code which combined trellis-coded modulation with differential space-time block code was proposed.
基于OFDM(正交频分复用)系统，提出了一种新的空频时三维编码，将网格编码调制和差分空时分组码进行组合链接设计。
This letter present a differential space-frequency coded orthogonal frequency-division multiplexing (OFDM) scheme over frequency-selective fading channels.
本文提出了频率选择性衰变信道中采用了差分空频编码的正交频分复用(OFDM)传输方法。
To combine multilevel code (MLC) with differential space-time modulation (DSTM), a new scheme based on an multilevel low-density parity-check (LDPC) code with iterative decoding is proposed.
提出一种新的结合多级编码和差分空时调制的联合编码调制方案。
Based on the above, the impact of amplitude coefficient ratio on amplitude-phase Double Differential Space-Time Codes is discussed, and an optimal selection scheme in amplitude coefficient is given.
在此基础上，讨论了幅度系数比对幅度相位双差分空时码的影响，并给出了一种最佳的幅度系数选择方案。
The current study was designed to investigate MRI differential diagnosis and clinical value of lymphoadiopathies in the retrocrural space.
当前的研究旨在调查MRI鉴别诊断和后路间隙淋巴性病变的临床价值。
Besides dispensing with the traditional engine bay on a car, hub motors save space and weight because there is no need for a mechanical transmission, with its driveshafts and differential units.
除了不需在汽车上配置传统发动机舱，由于轮毂电机不需要机械传动(一般有传动轴和差别单位)，轮毂电机能节省汽车空间并减少重量。
The State-Space method is applied to compute the differential equation of the elastodynamics of mechanism.
应用基于状态空间法的闭式算法对机构弹性动力学微分方程进行求解。
The dynamical property of this model is described by dual differential equations and it can find out several stable equilibrium points from any initial point in the state space.
该模型的动态特性可由对偶微分方程描述，它具有从状态空间内任一初始点找出多个稳定平衡点的能力。
By the parametric representation, fuzzy number means a bounded continuous curve in the two-dimensional metric space R2, so that it is easy to analyze fuzzy differential equations.
在此参数表示下，模糊数可直接视为二维度量空间r 2中的有界连续曲线，这给分析模糊微分方程带来了便利。
Besides there is also some alternatives such as an inductance conversion using differential transformer and space curve deformeter and variable resistance pressure transmitter.
除此之外还有利用差动变压器和扰曲线应变计的电感变换方式，以及变电阻式压力变送器。
The mixed partial differential terms of time variables and space variables in the pseudo-parabolic equation make the discussion of the difference scheme more difficult.
伪抛物型方程中关于时间与空间变量的混合偏导项给差分格式的讨论带来了一定难度。
To reduce the horizontal vibrations of high-speed elevator, a 4DOF dynamic model of elevator was developed, and the differential equations and the state space model were also given.
为了降低高速电梯的水平振动，建立了4自由度的电梯轿厢水平振动主动控制的动力学模型，给出了微分方程，建立了状态空间模型；
Quantity and space both play a role in analytic geometry, differential geometry, and algebraic geometry.
数量和空间在解析几何，微分几何和代数几何中都发挥作用。
In the classical differential geometry which deals with the theory of curves and surfaces of three dimensional Euclidean space, the most distinctive study is the Weingarten surface.
经典微分几何研究三维欧氏空间中曲线曲面理论，其最具有特色的研究是主曲率函数满足某些关系的魏因加吞曲面。
The state space method coupled with the technique of differential quadrature (SSDQM) was presented for plane stress problems.
针对平面应力问题，提出了利用状态空间法和微分积分法的混合解法（SSDQM）。
The centerline of elastic rod or elastic filament can be abstracted as space curves to deal with them by the knowledge of the theory of space curve and differential geometry.
由于弹性杆的中心线或弹性细丝可以抽象成空间曲线，然后根据空间曲线论和微分几何的知识进行处理。
Objective: To study ct diagnosis and differential diagnosis of splenic space occupying lesion.
目的：探讨脾脏占位性病变的CT诊断及鉴别诊断。
The derivation of state space models is no different from that of transfer function in that the differential equations describing the system dynamics are written first.
状态空间模型的推导与传递函数的推导没有什么不同，总是先将描述系统特性微分方程写出来。
State equations the derivation of state space models is no different from that of transfer function in that the differential equations describing the system dynamics are written first.
状态空间模型的推导与传递函数的推导没有什么不同，总是先将描述系统特性微分方程写出来。
Utilizing principle of potential energy to obtain governing differential equations, to turn differential equations into state equations by means of state space method.
用最小势能原理得到控制微分方程组，采用状态空间法将微分方程化为状态方程。
A mathematical analysis was conducted for the ventilation process in the space of mining area underground and the differential equations were derived.
对井下采场空间的通风过程进行了数学分析，导出了通风微分方程序。
As a important basis of calculating the distortion and strength of the buried pipeline, the paper gives out the space curve differential equations of elastic foundation-beam (displacement equation).
作为计算埋地管道变形和强度的重要基础，给出了弹性地基梁的挠曲线微分方程(位移方程)。
Objective: To improve the levels of diagnosis and differential diagnosis for cavity or air containing space pulmonary lesions.
目的：提高对肺部空洞或空腔性病变的诊断及鉴别诊断水平。
The human dose assessment for space radiation was obtained from the proton differential spectrum and the integral of the differential dose energy spectrum.
对空间质子微分注量谱和微分剂量能谱积分，得到空间辐射剂量估计值。
Analyze the space correlation in the single differential image: sample the wavelet coefficients with window and segment the image into the equal blocks.
分析单幅差分图像的空间相关性：使用采样窗口对单幅差分图像的小波域采样并将图像分割成若干个均匀分布的小块。
The differential rent of urban land is the lever to adjust the urban land makes use of the types space structure.
城市土地级差地租是调节城市用地类型空间结构的杠杆。
应用推荐