FDMA

The user capacity in FDMA/ TDMA cellular system is frequency limited, while in CDMA cellular system, it is interference limited.

在FDMA/TDMA蜂窝系统中，用户容量是频带受限的。在CDMA蜂窝系统中，用户容量是干扰受限的。

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Methods: Image coding compression using wavelet transforms and CDMA DS/ FDMA technology were used for the digital data link.

方法：采用图像压缩技术和频分加码分复合通讯体制建立无线电数字化信息传输通道。

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It is important to calculate the intermodulation ( IM) interference for FDMA in satellite communications.

卫星通信中准确而方便地计算交调干扰对颖分多址（FDMA）有巨大的实际意义。

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A DFT Spread Generalized Multi-Carrier Based FDMA Scheme for Uplink Transmission

基于DFT扩频的广义多载波频分多址上行链路传输方案&DFT-S-GMC

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Orthogonal Frequency Division Multiple Access ( OFDMA ) gains an increasing attention for broadband wireless access ( BWA ) system.

OFDMA 在 BWA 系统中得到越来越多的应用.

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For TDMA and FDMA, they solve the interference problem by employing orthogonal waveforms for different users.

对于TDMA和FDMA，他们通过在不同用户间采用正交的波形来对抗用户间干扰。

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In the following, an analytical model of data capacity in TDMA/ FDMA cellular systems is developed for the performance simulation of the scheme.

同时建立了一个基于TDMA/FDMA蜂窝小区的数据容量解析模型来分析该体制的性能。

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CDMA system, compared with FDMA and TDMA systems, is more accessible to a large capacity.

CDMA系统相比于FDMA和TDMA系统更容易获得大的系统容量。

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In this system, continuously variable slope delta modulation ( CVSD) is used to change the analogy signal into digital, GFM is used to modulate the signal, FDMA, PLL frequency synthesizer.

这种系统采用连续可变斜率增量调制（CVSD）来实现语音信号的编码、GFM调制解调方式、FDMA、PLL频率合成器技术。

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A Comparison of the Spectral Efficiency Between FDMA, TDMA and CDMA Cellular Systems

FDMA，TDMA与CDMA蜂窝系统频谱效率的比较

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To meet the above requirement, it is suitable to use the hybrid techniques of CDMA/ TDMA/ FDMA. Among those, multi carrier CDMA schemes have drawn much attentions.

为满足上述要求，宜采用CDMA／TDMA／FDMA混合多址方式，其中多载波CDMA已成为目前研究热点。

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This article discusses basic features of mobile communication systems via regional geostationary satellites with FDMA/ TDMA, including its basic characteristics, components and internal communication.

本文论述了采用FDMA／TDMA体制的区域卫星移动通信系统的基本特点、组成以及网络内部通信。

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ATM Based Satellite Integrated Broadband Communications Network Accessed in FDMA

基于FDMA的卫星ATM综合宽带通信网

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This paper introduce CDMA Mobile Technology, describe the architecture of CDMA system, and list the key differences between FDMA, TDMA, and CDMA.

介绍了CDMA移动通信技术的原理、特点，并将其同传统的TDMA、FDMA技术进行比较；

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Resource allocation for FDMA based two-hop relay networks

基于FDMA系统的两跳中继网络的资源分配

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The CDMA system, which has striking advantages of anti-multipath fading, soft capacities and large capacities over FDMA and TDMA systems, has been focused by all of the countries.

扩频技术由于具有抗多径，软容量和时分多址与频分多址更大的容量和优势，而受到各国研究者的重视。

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SC-FDMA is a new kind of FDMA system which was submitted in recent years. It has the same PAPR property as single carrier system and its resource scheduling is as flexible as multi-carrier system.

SC-FDMA是近年来国际上提出来的一种既具备单载波系统功率峰均比，又具备多载波通信实现简单和资源调度灵活特性的新型频分多址通信系统。

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Study on demodulating multi-channel FDMA/ FSK signals on board based on FFT

基于FFT的星上多路FDMA/FSK信号解调研究

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Capacity of CDMA and FDMA for Multi-beam GEO Satellite Communications

多波束GEO卫星通信中CDMA与FDMA的多址容量

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Analysis shows that adaptive allocation in OFDMA could save transmit power than equal allocation in traditional FDMA systems, and the performance is improved greatly.

分析表明自适应OFDMA比资源平均分配的FDMA系统节省功率，改善了系统性能。

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The MAC protocol for HFC network based on TDMA/ FDMA is studied thoroughly.

深入研究了基于TDMA／FDMA的HFC网络MAC技术。

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An algorithm was proposed to demodulate multi-channel FDMA/ FSK signals based on fast Fourier trans-form ( FFT).

提出了一种基于FFT的星上多路FDMA/FSK信号解调算法。

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An improvement method frequencyaccess ( FDMA ) for routing is put forward in mobile ad hoc networks.

无线移动自组网路由协议是提高网络吞吐量及减小时延的关键,也是目前研究的热点.

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Analysis of the Microwave Nonlinear Circuit Excited by FDMA Digitally Modulated Signal by Using Time Domain Spectral Balance Method

用时域-谱平衡法分析FDMA数字调制信号激励的微波非线性电路

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This paper presents the introduction of the concept of CDMA digital cellular system. Compared CDMA with FDMA and TDMA, we analyze the capacity of CDMA, and research one of the key technology: power control. Some conclusions are obtained.

简要介绍了CDMA数字蜂窝系统的概念，将CDMA与FDMA和TDMA相比较，对CDMA系统容量进行了分析，对其关键技术之一的功率控制，进行了研究并得出了一些结论。

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General specification for microwave communication systems with TDM/ FDMA point-to-multipoint

GB/T16650-1996tdm/FDMA点对多点微波通信系统通用规范

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It describes and compares three kinds of multiaddress connection technique of frequency division multiaddress ( FDMA), time division multiaddress ( TDMA) and code division multiaddress ( CDMA).

介绍了频分多址（FDMA）、时分多址（TDMA）和码分多址（CDMA）三种多址联接技术，并对它们进行了比较。

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Introduce a software-based radio thinking FDMA digital IF receiver system design.

介绍了一种基于软件无线电思想的频分多址中频数字化接收机系统设计方案.

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A DFT spread generalized multi-carrier ( GMC) based frequency division multiple access ( FDMA) scheme, i.e. DFT-S-GMC is proposed for uplink transmission of wideband mobile communication systems.

针对宽带移动通信上行链路传输，提出一种基于离散傅立叶变换（DFT）的广义多载波（GMC）频分多址方案&DFT-S-GMC。

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Ultra Narrow Band Technology Based FDMA Power Line Communication Technology of Long-Distance Meter Reading Solution for Distributed Users

基于超窄带FDMA电力线通信技术的分散用户远程抄表解决方案

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