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Description: 高速跳频，调制样式为DPSK(DPSK/FH)，包括信号的发射接收模型，自己写的代码，仅供参考。-High-speed frequency hopping, modulation pattern for DPSK (DPSK/FH), including the launch of signal reception model, write your own code, for reference purposes only.
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Size: 3072 |
Author: 史英春 |
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Description: LDPC_OFDM无线高速数据传输系统研究-LDPC_OFDM wireless high-speed data transmission system
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Size: 4135936 |
Author: 韩杨 |
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Description: 摘要:基于通信技术的列车运行控制系统(CBTC)是铁路信号的发展方向，交频分复用
OFDM)是一种无线环境下的高速传输技术，它对高速列车控制信息传输中卞要受到的由于多
径传播引起的快衰落所产生的影响有很强的抵抗能力.本文首先介绍了OFDM技术的发展和
基本原理，然后在计算机上用M atlal〕对其性能进行了仿真，仿真中将OFDM与传统的单载波
调制方式—i1，交振幅调制( 1frQAM)对抗多径十扰的性能进行了比较，最后分析了一者的仿真结果.
-Abstract: Based on the communication technology train operation control system (CBTC) is a railway signal direction for the development of cross-frequency division multiplexing OFDM) is a wireless environment of high-speed transmission technology, its high-speed train control information transmission Bian be subject to the Due to the spread of multi-path fast fading caused by the impact of a strong resistance to diseases. This paper first introduces the OFDM technology development and the basic principles, and then on the computer〕 M atlal use its performance simulation will OFDM with the traditional single-carrier modulation-i1, cross-amplitude modulation (1frQAM) against multi-path interference of the 10 properties were compared with a final analysis of the simulation results.
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Size: 36864 |
Author: ma ming |
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Description: 是基于LabView的OFDM模拟仿真系统，对学习宽带高速通信技术很有用-LabView-based simulation of the OFDM system for broadband high-speed communications technology to learn useful
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Size: 2239488 |
Author: uw |
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Description: 主要是Space-Time Codes and MIMO Systems电子书，Ultra-High Speed Optical OFDM
Transmission Technologies文章，MIMO的研究与仿真论文-Is Space-Time Codes and MIMO Systems book, Ultra-High Speed Optical OFDM Transmission Technologies article, MIMO and simulation research papers ... ...
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Size: 10800128 |
Author: 徐燕 |
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Description: OFDM(正交频分复用)技术实际上是MCM(Multi-Carrier Modulation，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分，信道均衡变得相对容-OFDM (Orthogonal Frequency Division Multiplexing) technology is MCM (Multi-Carrier Modulation, multi-carrier modulation) is. The main idea is to channel into a number of orthogonal sub-channel, high-speed data signals into sub-parallel low-speed data streams, modulation in the transmission on each channel. Orthogonal signal at the receiving end through the use of related technologies to separate, thus reducing the mutual interference between the channel (ICI). Each channel on the signal bandwidth is less than the relevant channel bandwidth on each channel of the decline can be seen as flat, make it possible to eliminate inter-symbol interference. And because of the bandwidth of each channel is the original channel only a small portion of bandwidth, channel capacity become relatively balanced
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Size: 87040 |
Author: siren |
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Description: OFDM —— OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术，实际上OFDM是MCM Multi-CarrierModulation，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。此程序为ofdm仿真程序！-OFDM- OFDM (Orthogonal Frequency Division Multiplexing) that is orthogonal frequency division multiplexing, OFDM is the fact MCM Multi-CarrierModulation, a multi-carrier modulation. The main idea is: The channel is divided into a number of orthogonal sub-channel, high-speed data signals into parallel low-speed sub-data stream, modulated to be transmitted in each sub-channel. This program is ofdm simulation program!
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Size: 2048 |
Author: 周强 |
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Description: 高速移动环境下（高铁）OFDM关键技术的研究，包括ICI消除，多普勒分集，CDMA-多普勒分集联合等关键技术-High-speed mobile environment (High Speed Rail) OFDM key technology research, including the elimination ICI, Doppler diversity, CDMA-Doppler sub-set of key technologies such as the Joint
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Size: 7358464 |
Author: 夜思明 |
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Description: 正交频分复用技术是近年来发展起来的新技术,在高速无线数据传输领域有很大的应用前景。文章在分析和总结相关文献的基础上,介绍了正交频分复用(OFDM)技术的发展历史,讨论了正交频分复用技术的基本原理和实现方法。通过分析表明,在高速无线通信中OFDM对于消除符号间干扰(ISI),降低系统的复杂度等方面具有很大优势。正交频分复用(OFDM)是一种多载波宽带数字调制技术,它能有效地克服传输中的多径干扰和消除码间串扰,适合于高速率的地面信道视频传输。本文就OFDM技术进行了较为详尽的分析,并对OFDM的传输特性进行了基于FFT算法实现的MATLAB软件模拟及模拟结果分析。 -OFDM is a new technology developed in recent years, high-speed wireless data transmission in the field of great applications. This paper analyzes and summarizes the basis of relevant literature, describes orthogonal frequency division multiplexing (OFDM) technology, history, orthogonal frequency division multiplexing discussed the basic principles and implementation methods. The analysis shows that in the high-speed wireless communication in OFDM symbol for the elimination of interference (ISI), and so reduce the complexity of the system has great advantages. Orthogonal frequency division multiplexing (OFDM) is a multi-carrier wideband digital modulation techniques, can effectively overcome the transmission of multi-path interference and the elimination of intersymbol interference, the ground for high-speed video transmission channel. In this paper, OFDM technology, a more detailed analysis, and transmission characteristics of OFDM FFT algorithm based on the MATLAB software simulation
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Size: 71680 |
Author: 罗萍 |
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Description: OFDM调制技术在宽带高速电力线通信中的应用-OFDM modulation technique in broadband high-speed power line communication
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Size: 203776 |
Author: liming |
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Description: 正交频分复用（OFDM）是一种特殊的多载波传输技术。它可以有效地对抗多径衰落，能够以很高的频谱利用率来实现高速数据传输。分析介绍了OFDM系统的基本原理及系统性能，以Matlab为开发平台，仿真了OFDM系统的误码率，仿真结果表明OFDM系统在较低信噪比下也具有较好的性能-Orthogonal Frequency-division Multiplexing（OFDM） is a special kind of multi-cartier transmission technology. It can effectively overcome multi-path fading and increase the spectral usage efficiency to implement high-speed data transmission. This paper analyzes the basic principle of OFDM system and system performance, and simulates the Bit Error Rate （BER） of OFDM system on the platform of Matlab. The simulation results show that the OFDM has a good performance.[
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Author: co |
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Description: 码分多址(CDMA)技术作为第三代移动通信系统的核心技术，具有容量大、抗干扰能力强等优点。然而,传统的CDMA系统属于窄带扩频系统,它的数据速率比较低,不能胜任新一代移动通信系统
（beyond 3G）高速数据通信的需要。而多载波传输技术－正交频分复用（OFDM），作为后三代移动通信的核心技术，则具有高数据速率传输的特点。-Code Division Multiple Access (CDMA) technology as the third generation mobile communication system' s core technology, high capacity, anti-interference ability and so on. However, the traditional narrow-band CDMA system is spread spectrum system, and its relatively low data rate, can not do next-generation mobile communication systems (beyond 3G) high speed data communication needs. The multi-carrier transmission technology- orthogonal frequency division multiplexing (OFDM), after three generations of mobile communications as a core technology, the high data rate transmission characteristics.
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Size: 774144 |
Author: w |
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Description: Designing spectral e±cient, high-speed wireless links that o® er high quality-
of-service and range capability has been a critical research and engineering chal-
lenge. In this thesis, we mainly address the complexity and performance issues of
channel estimation and data detection in multiple-input multiple-output (MIMO)
orthogonal frequency division multiplexing (OFDM) systems over time-varying
channels.
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Size: 493568 |
Author: ashish |
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Description: Turbo码在水声OFDM通信中的应用研究，增强高速水声通信中信息传输的可靠性-Turbo codes in underwater acoustic OFDM communication, and enhance the reliability of information transmission in high-speed underwater acoustic communication
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Size: 387072 |
Author: caoyongmei |
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Description: 使用matlab程序将mimo技术与OFDM系统进行融合技术进行仿真。实现高速的数据通信-Matlab mimo OFDM system simulation fusion technology. To achieve high-speed data communication
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Size: 12288 |
Author: chenming |
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Description: OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术，实际上OFDM是MCM Multi-CarrierModulation，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，从而可以消除码间串扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部分，信道均衡变得相对容易。-OFDM (Orthogonal Frequency Division Multiplexing) that is orthogonal frequency division multiplexing, OFDM is actually MCM Multi-CarrierModulation, a multi-carrier modulation. The main idea is: The channel is divided into a number of orthogonal sub-channel, high-speed data signal into parallel low-speed data streams, modulated to be transmitted on each subchannel. Quadrature signal at the receiving end can be separated using technologies, which can reduce the mutual interference between ICI subchannels. Signal is less than the bandwidth of each sub-channel coherence bandwidth of the channel, each subchannel can be regarded as flat fading, which can eliminate inter-symbol interference. And because the bandwidth of each subchannel is only a small part of the original channel bandwidth, channel equalization becomes relatively easy.
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Size: 321536 |
Author: mixa |
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Description: 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分，信道均衡变得相对容易。-OFDM (Orthogonal Frequency Division Multiplexing) that is orthogonal frequency division multiplexing, in fact, is a multi-carrier OFDM modulation. The main idea is: The channel is divided into a number of orthogonal sub-channel, high-speed data signal into parallel low-speed data streams, modulated to be transmitted on each subchannel. Quadrature signal at the receiving end can be separated using technologies, which can reduce the mutual interference between ICI subchannels. The signal bandwidth of each subchannel is less than the channel coherence bandwidth, and therefore can be regarded as flat fading on each sub-channel, thereby eliminating inter-symbol interference. And because the bandwidth of each subchannel is only a small part of the original channel bandwidth, channel equalization becomes relatively easy.
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Size: 2048 |
Author: 刘金星 |
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Description: 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 transform of the multi-carrier wideband digital modulation through. Compared to the general digital communication system. It has high bandwidth efficiency and resistance to multipath interference ability, etc., which is suitable for high-speed wireless communications systems. Orthogonal frequency division multiplexing (OFDM) is a core technology of fourth generation mobile communication. Firstly, brief introduction to the basic principles of OFDM. On the basis of a given OFDM system model, using MATLAB language to achieve a computer simulation program and gives the reference design of the entire system.
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Size: 4096 |
Author: 张生 |
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Description: OFDM is multicarrier modulation (MCM) technique which provides an efficient means to
handle high speed data streams on a multipath fading environment that causes ISI. Normally
OFDM is implemented using FFT and IFFT’s. To decrease the BW waste brought by adding
cyclic prefix, wavelet based OFDM is employed.-OFDM is multicarrier modulation (MCM) technique which provides an efficient means to
handle high speed data streams on a multipath fading environment that causes ISI. Normally
OFDM is implemented using FFT and IFFT’s. To decrease the BW waste brought by adding
cyclic prefix, wavelet based OFDM is employed.
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Size: 37888 |
Author: awatif |
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Description: OFDM仿真文档，有发射机，接收机，信道，附件有matlab仿真代码-Fixed Broadband Wireless Access (BWA) is a promising technology
which can offer high speed voice, video and data service up to the
customer end. Due to the absence of any standard specification, earlier
BWA systems were based on proprietary standard. IEEE 802.16
WirelessMAN standard specifies a Medium Access Control (MAC) layer
and a set of PHY layers to provide fixed and mobile Broadband Wireless
Access (BWA) in broad range of frequencies. The WiMAX forum has
adopted IEEE 802.16 OFDM PHY layer for the equipment manufacturer
due to its robust performance in multipath environment. The thesis
investigates the simulation performance of IEEE 802.16 OFDM PHY
layer. The Stanford University Interim (SUI) channel models are selected
for the wireless channel in the simulation. The uation was done in
simulation developed in MATLAB. Perfect channel estimation is
assumed.
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Size: 954368 |
Author: 张晓龙 |
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