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OFDM
- OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术,实际上OFDM是多载波调制的一种。其主要思想是:将信道分成若干正交子信道,将高速数据信号转换成并行的低速子数据流,调制到在每个子信道上进行传输。正交信号可以通过在接收端采用相关技术来分开,这样可以减少子信道之间的相互干扰 ICI 。每个子信道上的信号带宽小于信道的相关带宽,因此每个子信道上的可以看成平坦性衰落,从而可以消除符号间干扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部
BER-ANALYSIS-IN-OFDM
- Multi-Carrier Modulation is a technique for data-transmission where a high-bit rate data stream is divided into several parallel low bit-rate data streams and using these low bit-rate data streams to modulate several carriers. Multi-Carrier Transmiss
ofdm
- 正交频分复用(OFDM)是一种通过快速傅里叶变换实现的多载波宽带数字调制技术。相比一般的数字通信系统。它具有频带利用率高和抗多径干扰能力强等优点,因而适合于高速率的无线通信系统。正交频分复用 OFDM 是第四代移动通信的核心技术。论文首先简要介绍了OFDM基本原理。在给出OFDM系统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序。-Orthogonal frequency division multiplexing (OFDM) is a fast Fourier
sensitivity-of-OFDM-subcarriers-with-CFO
- This program plots sensitivity of OFDM subcarriers with Carrier frequency offset(CFO)
FULLTEXT01
- OFDM Carrier Frequency Offset Estimation
OFDM_Performance_Vs_CFO
- 本代码对OFDM中载波频偏对系统误码率的影响进行了全面的仿真和比较,对加深对OFDM载波同步技术的理解很有帮助-The code in OFDM carrier frequency offset the impact of the system bit error rate of a comprehensive simulation and comparison to deepen the understanding of OFDM carrier synchronization helpful
STUDY AND ANALYSIS OF TIMING OFFSET ESTIMATION METHODS IN OFDM SYSTEMS
- OFDM is a multi-carrier transmission technique. It converts the frequency selective fading channel into a collection of parallel flat fading sub-channels which simplifies the structure of a receiver. OFDM has been widely used in communication system
carrier-modulation
- 多载波调制(Multicarrier Modulation)采用了多个载波信号。它把数据流分解为若干个子数据流,从而使子数据流具有低得多的传输比特速率,利用这些数据分别去调制若干个载波。所以,在多载波调制信道中,数据传输速率相对较低,码元周期加长,只要时延扩展与码元周期相比小于一定的比值,就不会造成码间干扰。因而多载波调制对于信道的时间弥散性不敏感。多载波调制可以通过多种技术途径来实现,如多音实现(Multitone Realization)、正交多载波调制(OFDM)、MC-CDMA和编码MC
FrequencyOffsetEstimationOFDM
- OFDM载波频偏估计器,保护捕获和跟踪模式,捕获范围很宽,采用ML估计器,在AWGN和多径信道均表现优良的快速捕获性能。-OFDM carrier estimator
OFDM_ML
- 对OFDM的载波频偏进行估计和补偿,采用ML最大似然估计算法,有不同频偏值和不同信噪比的仿真结果图。-For OFDM carrier frequency offset estimation and compensation, using ML maximum likelihood estimation, have different values and different SNR offset simulation results shown in Fig.
ofdm
- OFDM channel Using a large number of parallel narrow-band subcarriers instead of a single wide-band carrier to transport information l Advantages » Very easy and efficient in dealing with multi-path » Robust again narrow-band interferen
OFDM
- 基于matlab的OFDM系统仿真,比较了不同CP、子载波下误码率曲线-OFDM system simulation based on matlab, compared different CP, under the sub-carrier BER curves
ofdm
- 一种1024载波的ofdm系统仿真系统,这个仿真很完整。-A 1024 carrier ofdm system simulation system, the simulation is complete.
CMMB
- 基于cmmb标准的ofdm载波同步接收机代码-Implementation of CMMB standard based on the OFDM Carrier Synchronization receiver code
ofdm
- OFDM is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large number of closely spaced orthogonal sub-carrier signals are used to carry data on several parallel data streams or channels.
do_STO_CFO1
- ofdm载波频率偏移,对于学习频偏很有帮助-ofdm carrier frequency offset, frequency offset helpful for learning
OFDM
- OFDM is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large number of closely spaced orthogonal sub-carrier signals are used to carry data on several parallel data streams or channels.
BPSK--OFDM
- 该程序为在瑞利衰落信道下,OFDM系统采用FFT和IFFT实现多载波调制。-The program is in the Rayleigh fading channel, the OFDM system uses FFT and IFFT to achieve multi-carrier modulation.
ofdm-simulink
- 在现代无线通信技术中,扩频通信是一种具有较强抗干扰性能的技术,正交频分复用(OFDM)是一种具有较高数据传输速率和频谱利用率,并能有效对抗频率选择性衰落的多载波调制技术,因而将这二者结合起来构建系统势必会进一步提高系统的抗干扰和抗衰落性能,研究其结合技术也逐渐成为无线通信领域的热点。随着3G的兴起,即将推出的LTE也将采用OFDM技术(正交频分多路复用)。 由于OFDM的多载波特性,使得直接序列扩频技术和跳频技术能够与OFDM技术进行有效的结合。在本文中,我们研究了OFDM)以及相关抗干扰抗
matlab-ofdm-
- 扩频通信在现代无线通信技术中是一种具有较强抗干扰性能的技术,正交频分复用(OFDM)一种具有较高数据传输速率和频谱利用率,并能有效对抗频率选择性衰落的多载波调制技术,因而将这二者结合起来构建系统势必会进一步提高系统的抗干扰和抗衰落性能,研究其结合技术也逐渐成为无线通信领域的热点。随着3G的兴起,即将推出的LTE也将采用OFDM技术(正交频分多路复用)。 由于OFDM的多载波特性,使得直接序列扩频技术和跳频技术能够与OFDM技术进行有效的结合。在本文中,我们研究了OFDM)以及相关抗干扰抗衰落