频分多址

下行采用正交频分多址（OFDM），而上行是采用单载波频分多址（SC-FDMA）。

Orthogonal frequency division multiple access ( OFDM ) is used in downlink , and single carrier frequency division multiple access ( SC-FDMA ) has been adopted in uplink .

在LTE中，上行链路采用单载波频分多址（SC-FDMA），实现方式为离散傅里叶变换扩展OFDM（DFT-S-OFDM）技术，下行链路采用正交频分多址（OFDMA）技术。

The uplink used single carrier frequency division multiple access ( SC-FDMA ) which is realized by the extended discrete Fourier transform OFDM ( DFT-S-OFDM ) technology , and the downlink uses orthogonal frequency division multiple access ( OFDMA ) technology in LTE .

频分多址接入模型设计及MATLAB仿真计算

Emulation of FDMA Model Based on Matlab

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

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

该文给出了一种应用于上行正交频分多址（OFDMA）系统的同步参数盲估计方法。

An algorithm for the blind estimation of uplink OFDMA synchronization parameters is introduced in this article .

研究了正交频分多址接入（OFDMA）上行链路中采用交织子载波分配方案的多用户信号同步及分离。

Multi-user signal synchronization and separation for the interleaved orthogonal frequency division multiplexing ( OFDMA ) uplink are investigated .

提出了一种采用分布式天线的三角形小区架构，充分运用了正交频分多址（OFDMA）以及分布式天线等先进的物理层技术。

Making full use of advanced physical layer technique like orthogonal frequency multiply access ( OFDMA ) and distributed antenna .

而SC-FDMA（单载波频分多址）是一种使用单载波调制和频域均衡的技术，具有低PAPR这一显著特性。

SC-FDMA is a technology using single-carrier modulation and frequency-domain equalization , has the property of low PAPR .

由于GLONASS采用频分多址的方式识别卫星，每颗卫星的载波频率各不相同，所以在载波测量数据处理中不能采用与GPS载波相位测量数据处理相同的方法。

But the frequencies of the different satellites are not the same In GLONASS carrier phase relative positioning , the method of determining ambiguity is quite different from GPS .

正交频分多址（OFDMA）因其高频谱效率等优势被选为LTE下行链路的多址方案。

Orthogonal Frequency Division Multiple Access ( OFDMA ) is chosen as multiple-access scheme for downlink of LTE due to its high spectral efficiency and some other superiorities .

在OFDMA（正交频分多址）系统的上行链路，单个用户的定时偏移也会导致多用户干扰（MUI）。

In uplink OFDMA , timing offsets ( TO ) of other users with respect to a desired user can cause multiuser interference ( MUI ) .

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。

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 .

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。

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

近年来，无线移动通信技术取得了巨大的进步，其中最具有代表性的两项技术就是多跳中继技术和正交频分多址接入（OFDMA）技术。

Wireless mobile communication has made huge progress in recent years , and multi-hop relay and orthogonal frequency division multiple access ( OFDMA ) are two important new technologies in such field .

为了减小单载波频分多址接入系统（SC-FDMA）的峰均功率比（PAPR），提出了基于统计压扩的新方法。

In order to reduce the peak-average power ratio ( PAPR ) of single carrier-frequency division multiple access ( SC-FDMA ) system , a new method based on statistic companding was proposed .

LTE无线通信系统的下行链路采用正交频分多址（OFDMA）技术，通过基于动态比特分配的链路自适应技术最大化实现信道容量。

Orthogonal Frequency Division Multiple Access ( OFDMA ) is the downlink channel technology in next generation wireless communication system LTE . Dynamic bit loading adaptation link technology can be used to maximize OFDMA channel capacity .

接下来针对LTE上行传输技术，重点介绍了物理共享信道（PUSCH）和上行单载波频分多址信号的产生以及在终端发送时所采用的两种MIMO方式。

In the following transmission technology , it mainly focused on the physical uplink shared channel ( PUSCH )、 uplink DFT-S-FDMA signal generation and double MIMO mode used on the terminal transmission .

其上行链路多址技术是基于具有较低峰均比的单载波频分多址接入（SC-FDMA）技术。

LTE-Advanced system uplink multiple-access technology is SC-FDMA ( Signal Carrier-Frequency Division Multiple Access ) technology which is based on lower PAPR ( Peak to Average Power Ratio ) .

这代系统依赖各种不同码分多址（CDMA）技术，在LTE中，下行是采用正交频分多址（0FDM），上行是采用单载波频分多址（SC-FDMA）。

The generation relied on variations of Code Division Multiple Access ( CDMA ), However LTE implements Orthogonal Frequency Division Multiplexing ( OFDM ) for its downlink and for uplink it implements Single-Carrier Frequency-Division Multiple Access ( SC-FDMA ) .

为了实现这个目标必须要高效的利用有限的频谱资源，因此正交频分多址（OFDMA）技术与中继技术的结合应运而生。

To achieve this goal must efficiently use the limited scarce spectrum resources . The combination of orthogonal frequency division multiple access ( OFDMA ) technology and the relay technology will be used in the next generation wireless communication networks .

它与频分多址（SCPC，IDR/IBS，TES，VSAT）相比，以及与中速60Mb/s、高速120Mb/sTDMA相比，有许多独特优点。比较适合我国国情。

Compared with FDMA ( SCPC , IDR / IBS , TES , VSAT ), medium speed ( 60Mb / s ) and high speed ( 120Mb / s ) TDMA , it has many advantages .

本文针对正交频分多址（OFDMA）多跳中继蜂窝网络，提出一种基于染色理论的频率分配框架。

In this thesis , a novel channel assignment framework is presented based on incidence coloring for orthogonal frequency division multiple access ( OFDMA ) - based multiple hop cellular networks , which aims at suppressing multi-links interference and enhancing spectral efficiency .

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。

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 .

通过对移动通信系统关键技术的发展趋势和网络实时业务服务质量（QoS）需求的分析，提出了一种适用于时分-正交频分多址接入系统（TD-OFDMA）的简单高效的随机接入方案。

By the analysis of the development of key technologies and quality of service ( QoS ) requirements of the real-time traffic in mobile communication systems , a simple and efficient random access scheme which is suitable for TD-orthogonal frequency division multiple access ( TD-OFDMA ) systems is proposed .

正交频分多址接入系统的上行载波同步跟踪方法

Uplink carrier offset tracking method for orthogonal frequency division multiple access systems

无线正交频分多址系统中自适应资源配置研究

Research on Adaptive Resource Allocation in Wireless OFDMA System

频分多址/单路载波

Frequency division multiple access / single channel per carrier

为了解决上行正交频分多址系统中频率偏差导致多用户干扰和载波间干扰的问题，提出了一种载波同步跟踪方法。

A synchronization tracking method is given for uplink orthogonal frequency division multiple access ( OFDMA ) systems .

提出了一种基于正交频分多址接入系统的混合业务分组调度算法。

A packet scheduling algorithm for mixed traffics was proposed in orthogonal frequency division multiple access ( OFDMA ) systems .

链路自适应传输是正交频分多址系统关键技术，对提升系统性能起到关键作用。

Link adaptation transmission is a vital technology for OFDMA system , and it has great effect on the performance .