频分复用

波分复用和频分复用光纤通信技术研究

Study on WDM and FDM Optical Fiber Communications

介绍了非连续正交频分复用（NC-OFDM）的基本技术原理，作为一种基于OFDM的频谱池技术，将其结合认知无线电技术，推导了基于NC-OFDM的认知无线电带外干扰的产生原理。

The basic technology principle of the Non-Continuous OFDM ( NC-OFDM ), as an OFDM-based spectrum pooling technology was introduced , then combined with cognitive radio , the producing mechanism of out of band interference of cognitive NC-OFDM was derived .

光纤四波混频对ASK调制直接检测光频分复用系统性能的影响

Influence of Four-Wave Mixing in Fibers on the Performance of Ask Direct Detection Optical Frequency-Division Multiplexed Systems

正交频分复用（OFDM）技术是目前移动通信领域的一种新型调制技术。

Orthogonal-frequency-division-multiplexing ( OFDM ) technology is a new modulation technology .

用低价位DSP芯片实现频分复用

Accomplish FDM with low cost DSP

目前为止，主要有两种方式实现光的正交频分复用技术，分别是相干OFDM和全光OFDM。

Until now , there are two methods to implement optical OFDM system .

基于正交频分复用（OFDM）的航空移动通信多普勒效应研究

The Doppler Effect of Aviation Communication in OFDM System

正交频分复用（OFDM）调制技术

Orthogonal Frequency Division Multiplexing ( OFDM ) Modulation Technology

探讨频分复用方式的RF信道总能量的估算方法及其工程意义。

The estimation method of the RF channel total energy of frequency-mix-multiple was deeply researched .

正交频分复用（OFDM）体制是一种应用前途广阔的新的多路复用体制。

The OFDM system is a new multiplexing system that possesses a great future .

同步技术是正交频分复用（OrthogonalFrequencydivisionMultiplexing，OFDM）系统中的一项关键技术。

Synchronization technique is one of the key technologies in the Orthogonal Frequency Division Multiplexing ( OFDM ) systems .

正交频分复用（OFDM）是未来无线通信网络最具竞争力的物理层解决方案。

OFDM is the most promising solution for the physical layer of future wireless communication networks .

高效率的快速傅立叶变换（FFT）的算法是正交频分复用（OFDM）系统中的一项核心技术。

High efficient FFT ( I FFT ) algorithm is a key technology in OFDM system .

然而高移动性也给基于正交频分复用（OrthogonalFrequencydivisionMultiplexing，OFDM）调制方式的多载波LTE系统带来了新的挑战。

However , high-mobility also brings new challenges to Orthogonal Frequency-Division Multiplexing ( OFDM ) - based LTE systems .

其中，正交频分复用（OFDM）技术成为该领域中的一项热门研究项目。

Orthogonal Frequency Division Multiplexing ( OFDM ) techniques become a top research project in this domain .

在多用户正交频分复用（OFDM）系统中，提出了一种基于复合星座的自适应子载波和比特分配方案。

An adaptive subcarrier and bit allocation method based on embedded constellation is proposed for multiuser OFDM systems .

正交频分复用技术（OFDM）将一个宽的频带划分为若干比较窄的子带。

Orthogonal frequency-division multiplexing ( OFDM ) splits a wide frequency band into a bank of narrow sub-bands .

在该技术发展的第三阶段，将正交频分复用（OFDM）技术作为其中的关键技术之一。

The key technology in the 3rd phase of HSDPA is Orthogonal Frequency Division Multiplexing ( OFDM ) .

正交频分复用（OFDM）技术能够有效地对抗多径传播引起的频率选择性衰落，将频率选择性衰落信道转化为平坦衰落信道。

Orthogonal Frequency-Division Multiplexing ( OFDM ) is a fine technique to mitigate the effect of frequency-selective fading .

OFDM系统就是正交频分复用系统，它是一种特殊的多载波调制解调系统。

OFDM system is orthogonal frequency division multiplexing system , it is a special multi-carrier modulation and demodulation system .

作为一种高效的数据传输技术，正交频分复用（OFDM）技术具有良好的抗衰落能力，实现数据的高速传输。

As an efficient data transmission technique , OFDM can resist multi-path fading and realize high data rate transmission .

欧洲的数字视频地面广播（DVB-T）标准采用了正交频分复用（OFDM）技术。

The OFDM technique is adopted in the European Standard for DVB-T broadcasting .

在正交频分复用（OFDM）系统中，这种频率偏移会使信号产生很大的误差，严重影响系统的性能。

In orthogonal frequency-division multiplexing ( OFDM ) systems , this frequency offset causes large errors in the signal values .

正交频分复用（OFDM）是一种在干扰环境下有很高可靠性的信号处理技术。

Orthogonal Frequency Division Multiplexing ( OFDM ) with signal processing techniques for high data reliability in noisy media conditions .

在正交频分复用（OrthogonalFrequencydivisionMultiplexing，OFDM）系统中，接收机的性能很大程度受信道估计精度的影响。

In Orthogonal Frequency Division Multiplexing ( OFDM ) systems , the performance of the receiver highly depends on the accuracy of channel estimation .

正交频分复用（OrthogonalFrequencydivisionMultiplexing，OFDM）是一种能够对抗多径衰落的高数据率多载波调制技术。

Orthogonal Frequency Division Multiplexing ( OFDM ) is a useful high data rate transmission technology , which is robust to the multipath fading .

正交频分复用（OFDM）通信系统对频率偏移比较敏感，容易导致系统性能急剧下降。

OFDM ( Orthogonal Frequency Division Multiplexing ) systems are sensitive to frequency offset , which will degenerate the system performance .

符号、载波偏移严重影响着正交频分复用（OFDM）接收系统的性能。

Symbol timing and carrier frequency offset will significantly degrade the performance of OFDM ( Orthogonal Frequency Division Multiplexing ) receiver .

正交频分复用调制（OFDM）技术利用许多并行的子载波来实现高速的数据通信。

Orthogonal frequency division multiplexing modulation ( OFDM ) technology use a number of parallel subcarriers to achieve high-speed data communications .

介绍了正交频分复用（OFDM）技术的基本原理和特点，并对基于DFT/IDFT的OFDM的系统进行分析。

The basic Principle and character of OFDM is introduced here , and the system based on DFT / IDFT is analyzed .