code division multiplexing是什么意思

网络释义

用法例句

In this case,the OFDM technique is considered to be unsuitable,so that a channel model is established and a new scheme based on orthogonal code division multiplexing(OCDM)combined with block coding is proposed.

低仰角下的宽带地空通信信道存在严重的多径衰落现象,其信道特性与地面移动通信的情况很不相同,不适于采用正交频分复用技术,为此建立了低仰角下的宽带地空信道模型,并提出了一种正交码分复用与分组编码技术相结合的通信系统方案。

In this paper, the effect of composition of transition metal oxides obtained by the orthogonal design , atmosphere and the nucleation agent on the gloss of metal glazes in ferric oxides was discussed.

采用廉价的铁系氧化物,研究了正交设计的过度金属氧化物组成、气氛、晶核剂等因素对釉面金属光泽的影响。

The second and the third step reaction conditions of the synthesis of L-carvone from d-limonene were studied by the use of orthogonal design, and the whole yield of these two reactions is more than 80% by the use of new reaction conditions.

利用正交法对d - 艹宁 烯合成L -香芹酮的第二步 (脱氯化氢 )和第三步 (水解反应 )反应的工艺条件进行分析 ,得到了较为理想的工艺 ,使二、三两步反应总收率达 80 %以上。

In this experiment,orthogonal design with three levels of four factors(Taq DNA polymerase, dNTPs,primer and Mg2+) was used to optimize the pepper ISSR-PCR reaction system.

本试验利用正交设计,以辣椒SS69为试材,从Taq酶、dNTPs、引物、Mg2+4因素3水平来优化辣椒ISSR-PCR反应体系。

Design of Two-direction Orthogonal Partially Prestressed Concrete Beam with 32.0m × 17.0m Span;

32.0m×17.0m跨双向正交部分预应力混凝土梁的设计介绍

Matri representation of the orthogonal complement in euclidan space;

欧氏空间中正交问题的矩阵描述

New Definition of the Conditional Number of a Matrix──Nonorthogonal Degree;

矩阵条件数的新定义──矩阵的非正交度

Completeness and orthogonality of scale transformation and its proof;

尺度变换函数的完全性和正交性及其证明

Regularity and orthogonality of a new family of bivariate wavelets;

一类新的二元小波的正则性及正交性

Orthogonality For Defining Hermite-polynomial;

利用正交性定义Hermite多项式

This paper analyzed the issues about the sideband and local oscillator leakage of a direct quadrature conversion transmitter, educed the quantitative relationship of the amplitude and phase imbalance in the modulation signal as well as local oscillator signal and the sideband and local oscillator leakage, and simulated it.

本文分析了直接正交上变频无线发射机中的边带和本振泄漏问题 ,导出了调制信号和本振信号的幅度和相位不平衡度与发射机的边带和本振泄漏抑制能力之间的定量关系 ,并进行了仿真。

The theory of digitial calibration for the gain and phase mismatches between the in-phase and quadrature branches is discussed.

讨论了正交双通道幅相不一致的数字校正原理 ,提出了两种获得幅相误差函数的方法 ,包括最小二乘法和改进的Gram Schmidt正交化方法 。

Structure based on nerve net time finity orthonormal wavelet;

基于神经网络的时有限正交小波构造

Characterization of Separable Bivariate Orthonormal Compactly Supported Wavelet Basis;

二元可分正交紧支集小波基的刻划

The paper introduces a kind of orthonormal frequrncy division multiplexing(FDM) digital modulation technique with a good performance which can solve,in some way,the fading problem of both the channel selective one resulted from multi\|path fading and Rayleigh fading.

介绍一种可较好地解决多径衰落所引起的信道选择性衰落 ,又可克服信道的瑞利衰落、性能优良的正交频分复用数字调制技术。