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Description: 运用matlab,采用QPSK调制与解调，包括串并转换，傅立叶变换与逆变换，信道估计（采用LS准则），多普勒频移等模块，内容清晰明了。-Use matlab, using QPSK modulation and demodulation, including string and conversion, Fourier Transform and inverse transform, channel estimation (LS criteria used), Doppler frequency shift modules, content clarity.
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Size: 3072 |
Author: guang_j |
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Description: 国外OFDM经典书籍，介绍正交频分复用（OFDM）技术的原理及其在无线通信领域内的应用，包含无线通信系统的发展历程以及无线衰落信道的基本特性，OFDM技术的基本原理与特性，OFDM技术内峰值平均功率比，同步和信道估计等问题-OFDM abroad classic books, Introduction Orthogonal Frequency Division Multiplexing (OFDM) technique and its application in the field of wireless communications applications, including wireless communication systems, as well as the development process of the wireless fading channel basic characteristics, OFDM technology, the basic principles and characteristics of , OFDM technology within the peak-average power ratio, synchronization and channel estimation issues such as
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Size: 4419584 |
Author: wan |
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Description: 应用MATLAB编程，LTE系统中上行链路SC-FDMA信号生成的程序-Application of MATLAB programming, LTE system uplink SC-FDMA signal generation process
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Size: 1024 |
Author: 杨睛 |
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Description: 3GPP LTE的MIMO Channel Model,是在SCM基础上进行的扩展，比SCM能支持更大的带宽及更高的频段-3GPP LTE of MIMO Channel Model, is based on SCM expansion than SCM can support a greater bandwidth and higher frequency bands
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Size: 219136 |
Author: phl |
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Description: Single Carrier FDMA又称SC-FDMA或者DFT-Spread-OFDM是3GPP LTE最新提出的适用于上行传输的一种新方案。相对于OFDMA（主要用于下行），其最大的优势在于低峰值平均功率比（即PAPR）。本程序包括OFDMA，SC-FDE（单载波频域均衡）以及SC-FDMA程序，接收端采用经典的ZF和MMSE检测算法，程序短小精悍，相当经典，方便该领域的人学习与研究。-Single Carrier FDMA or SC-FDMA, also known as DFT-Spread-OFDM is the latest 3GPP LTE uplink transmission for a new program. Compared to OFDMA (mainly used for the downlink), the biggest advantage lies in its low peak-average power ratio (ie, PAPR). This procedure, including OFDMA, SC-FDE (single carrier frequency domain equalization), as well as SC-FDMA procedure, the receiving end the use of classical ZF and MMSE detection algorithm, procedures dapper, very classic, convenient in the field to learn and research.
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Size: 50176 |
Author: 程鹏 |
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Description: 本文主要介绍频域均衡在LTE项目上SC_FDMA上行链路上的应用-In this paper, frequency domain equalization projects in the LTE uplink SC_FDMA Application are introduced
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Size: 971776 |
Author: 留心呀 |
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Description: Repetitive signal method for time and frequency synchronization for 3GPP long term evolution systems. A new method is proposed and comparison to the other approach is done in this article.
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Size: 249856 |
Author: jenna |
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Description: Freescale关于3GPP LTE PHY层的说明，包括OFDM、MIMO等内容。-This technical white paper provides an overview of the LTE physical layer(PHY), including technologies that are new to cellular such as Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Outpu(MIMO) data transmission.
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Size: 584704 |
Author: 张原 |
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Description: Abstract—In this paper we present an initial performance
evaluation of the 3GPP UTRA Long Term Evolution (UTRA
LTE) uplink with baseline settings. The performance results
are obtained from a detailed UTRA LTE uplink link level
simulator supporting OFDMA and SC-FDMA schemes. The basic
transmission scheme for uplink direction is based on singlecarrier
transmission in the form of DFT Spread OFDM with
an MMSE receiver. Two antenna configurations, SISO and 1x2
SIMO are considered in the analysis of spectral efficiency in
addition to Adaptive Modulation and Coding (AMC) and L1-
HARQ. For assessment purposes, the performance results of
SC-FDMA are compared with OFDMA. It is shown that 1x2
SIMO greatly increases the spectral efficiency of SC-FDMA
making it comparable to OFDMA, especially for high coding
rate. Furthermore, SC-FDMA has a flexibility to increase BLER
performance by exploiting frequency diversity.
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Size: 160768 |
Author: ashokec |
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Description: LTE的下行信道估计mse的测试，采用了LTE的下行频域结构，LS信道估计，线性插值算法。-LTE downlink channel estimation mse of testing, using LTE downlink frequency domain structure, LS channel estimation, linear interpolation algorithm.
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Size: 2048 |
Author: 严天方 |
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Description: 分析了LTE系统频率偏移，定时误差，信道估计问题等，并对广义Rake接收机和CPEDS接收机的性能做了比较。-Analysis of the LTE system frequency offset, timing error, channel estimation problems, and generalized Rake receiver performance receiver and CPEDS were compared.
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Size: 4240384 |
Author: penglu |
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Description: In this paper, proposeed a general methodology to study the performance of frequency allocation schemes in 3G LTE OFDMA systems.-In this paper, proposeed a general methodology to study the performance of frequency allocation schemes in 3G LTE OFDMA systems.
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Size: 326656 |
Author: HamidReza Mirsalari |
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Description: this file is performance mimo with frequency domain packet scheduler in lte downlink
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Size: 252928 |
Author: fateme |
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Description: 根据LTE上行SIMO接收机特点，对MMSERISIC均衡器进行简化修改，得到MMSEFDE均衡器,该均衡器所有步骤全在频域进行，大大降低了均衡算法的复杂度。-LTE uplink SIMO receiver according to the characteristics of the MMSE-RISIC equalizer to simplify modification, by MMSE-FDE equalizer, the equalizer all the steps in full in the frequency domain, greatly reduces the complexity of balancing algorithm.
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Author: 王凤 |
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Description: Relaying and orthogonal frequency division multiple
access (OFDMA) are the accepted technologies for emerging
wireless communications standards. The activities in many
wireless standardization bodies and forums, for example IEEE
802.16 j/m and LTE-Advanced, attest to this fact. The availability
or lack thereof of efficient radio resource management (RRM)
could make or mar the opportunities in these networks. This
paper therefore provides a comprehensive RRM algorithm for
OFDMA-based multi-cellular fixed relay networks in a way to
ensure fairness among users with minimal impact on the network
throughput (in contrast, pure opportunistic RRM techniques
always favor users with good channel conditions
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Size: 88064 |
Author: kumar |
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Description: 4G(LTE) - Extended Radio Frequency Performance with Digital Predistortion
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Size: 1832960 |
Author: imad001 |
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Description: 3GPP LTE关键技术浅析，LTE 改进并增强了空中接口技术，采用 OFDM 及 MIMO 技术作为其无线网络演进的唯一标准。 该文对 OFDM 技术及 MIMO 技术进行了分析，最后提出将OFDM 技术与 MIMO 技术相结合，从而消除由频率选择性衰落带来的影响，达到信息的高速和高可靠性传输。-The key technology of 3GPP LTE, LTE air interface improvements and enhanced technology, the use of OFDM and MIMO technology as the sole criterion for the evolution of wireless networks. This paper MIMO OFDM technology and analysis techniques, and finally proposed technology and MIMO OFDM technology, which eliminates the impact of frequency selective fading, to high-speed and high reliability of information transmission.
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Size: 186368 |
Author: wanglong |
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Description: Ajey, S., B. Srivalli, et al. (2010). On performance of MIMO-OFDM based LTE systems. Wireless Communication and Sensor Computing, 2010. ICWCSC 2010. International Conference on.
4G wireless systems predominately employ multiple input multiple output (MIMO) with an orthogonal frequency division multiplexing (OFDM) system. Like other 4G systems long term evolution (LTE) also employs MIMO-OFDM physical layer. MIMO helps in increasing the throughput whereas OFDM converts a frequency selective fading channel to multiple flat fading sub-channels facilitating easy equalization. It is proposed that LTE system should mandatorily support 2Ã — 2 MIMO setup. Our paper focuses on the performance of such a LTE system with two transmit antennas and two receive antennas in a frequency selective fading environment.
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Size: 311296 |
Author: Lakmali |
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Description: 自适应软频率复用技术在长期演进中上行上的应用，主要是如何解决小区边缘干扰问题。对小区边缘干扰提出了自适应软频率复用算法。-Adaptive Soft Frequency Reuse for Inter-cell
Interference Coordination in SC-FDMA based
3GPP LTE Uplinks
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Size: 149504 |
Author: 龙辉 |
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Description: LTE系统网络架构更加扁平化简单化，减少了网络节点和系统复杂度，从而减小了系统时延，也降低了网络部署和维护成本。LTE系统支持与其他3GPP系统互操作。根据双工方式不同LTE系统分为FDD-LTE（Frequency Division Duplexing）和TDD-LTE (Time Division Duplexing)，二者技术的主要区别在于空口的物理层上（像帧结构、时分设计、同步等）。FDD系统空口上下行采用成对的频段接收和发送数据，而TDD系统上下行则使用相同的频段在不同的时隙上传输，较FDD双工方式，TDD有着较高的频谱利用率。(The network structure of LTE system is more flat and simple, which reduces the network node and system complexity, thus reducing system delay and reducing the network deployment and maintenance costs. The LTE system supports interoperability with other 3GPP systems. According to the different ways of duplex LTE system is divided into FDD-LTE (Frequency Division Duplexing) and TDD-LTE (Time Division Duplexing), the main difference between the two techniques in physical layer on the interface (such as frame structure, time synchronization design, etc.). FDD system interface using paired downlink band transmit and receive data, while the TDD system uses the same frequency band downlink transmission in different time slots, FDD duplex mode, TDD has a higher spectrum utilization rate.)
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Author: LIU__
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