Description: MIMO 系统仿真，对时变信道的自适应调制-erq.m : function for ERQ algorithm in MIMO systems
space_wf.m : function for spatial domain power waterfilling
st_wf.m : function for spatial and temporal domain waterfilling
MIMO_rate.m : Plot spectral efficiency vs SNR for various cases
MIMO_ber.m : Plot BER vs SNR for ERQ algorithm
Report_figN.m : Plot figure N in final report (N=1,2,...,8) Platform: |
Size: 18432 |
Author: jonathan Peng |
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Description: Iterative receiver techniques, multiple-input – multiple-output (MIMO) processing, and
orthogonal frequency division multiplexing (OFDM) are amongst the key physical layer
technologies when aiming at higher spectral efficiency for a wireless communication system.
Special focus is put on iterative detection, decoding, and channel estimation for a MIMO-OFDM
system. After designing separately efficient algorithms for the detection, channel decoding, and
channel estimation, the objective is to optimize them to work together through optimizing the
activation schedules for soft-in soft-out (SfISfO) components. Platform: |
Size: 3104768 |
Author:ashish |
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Description: Reaching Higher data rate and spectral efficiency are among the challenges expected for 4G wireless systems. Combining OFDM modulation and multiple-input multipleoutput (MIMO) help for that. In this paper, performances of a WiMAX MISO-OFDM based system are studied through
measurements done in a reverberation chamber. The used antennas’ specifications are given as well as the numerical blocks description. The results obtained are compared to a reference
case with single-input single-output (SISO) in order to evaluate the studied system’s real performances Platform: |
Size: 466944 |
Author:satish |
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Description: 多输入多输出(MIMO)通信系统相比其他的通信系统具有更高的频谱效率，在不增加发射功率以及信号带宽的
情况下，MIMO 技术可以有效地提高系统信道容量及其性能。利用均匀角能量分布以及相关矩阵，分析了相关信道下的MIMO
系统信道容量，得出了系统信道容量的通用公式，并利用MATLAB 进行仿真。仿真结果表明，相关性的增加意味着信噪比的减
小，圆形接收天线阵列半径与角度扩展是决定MIMO 系统信道容量的主要因素。-Multiple-input multiple output (MIMO) communication architecture, as compared with conventional
techniques, has even higher spectral efficiency, and MIMO technique could greatly improve channel capacity and
performance of the system without any increase of transmitting power and bandwidth. By uniform angular distribution
and the correlation matrix, the MIMO channel capacity in correlated channel is investigated. Numerical simulation
is performed with MATLAB, thus to verify the proposed formula. Simulation result indicates that, for this model,
the increase of correlation means the reduction of signal-to-noise ratio (SNR), and the circular receive antenna
array radius or angle spread is the dominating factor for channel capacity. Platform: |
Size: 805888 |
Author:蜡笔 |
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Description: In the last few years wireless services have become more and more
important. Likewise the demand for higher network capacity and
performance has been increased. Several options like higher bandwidth,
optimized modulation or even code-multiplex systems offer practically
limited potential to increase the spectral efficiency. MIMO (Multiple Input
Multiple Output) Systems utilize space-multiplex by using antenna arrays to
enhance the efficiency in the used bandwidth. Platform: |
Size: 363520 |
Author:raida |
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Description: 多输入多输／皇(MIMO，Multiple Input Multiple Output)技术可以在不增加系统
带宽的情况下成倍地提高系统容量和频谱利用率，已成为下一代移动通信系统的
关键技术之一。-Multiple Input Multiply Output(MIMO)，which can dramatically increase the
channel capacity and spectral efficiency for a wireless system without occupying more
bandwidth，has become one of the key techniques for next-generation mobile
communication system． Platform: |
Size: 2777088 |
Author:蜡笔 |
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Description: MIMO是近年来数字通信领域重大的技术突破之一，它对提高无线通信系统的频谱利用率和信道容量有显著作用目前MIMO技术是正属于热门研究的3GPP LTE advanced的核心技术之一。
-MIMO is one of the major technological breakthrough in the field of digital communications in recent years, it is to improve the spectral efficiency of a wireless communication system have a significant effect and the channel capacity of MIMO technology is currently belong to one of the core technologies of the 3GPP LTE advanced. Platform: |
Size: 143360 |
Author:qiqi |
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Description: channel estimation based on MIMO-OFDm is a promising technology that will provide the high datarates , increased capacity, spectral efficiency and reliability that is required for a more efficient wireless communication. Platform: |
Size: 3161088 |
Author:John |
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Description: 本文在介绍MIMO无线通信系统模型的基础上，通过对比分析几种常用空时编码方法，选定空时分组码对信号进行编码并建立瑞利衰落信道模型，通过对两发一收及两发两收系统的仿真，研究接收天线数对系统接收信号可靠性的影响。之后进一步扩展到不同发射矩阵条件下研究多发一收系统的频谱利用率及误符号率，分析不同天线数目，不同发射矩阵条件下空时正交分组码检测算法的性能。-This paper introduced the MIMO wireless communication system model, through the comparative analysis of several commonly used method of space-time coding, grouping code for the selected space-time signal is encoded and establish Rayleigh fading channel model, through two rounds one and two rounds of closing Simulation of two closed systems, research receiving antennas to receive signals affect the reliability of the system. After further extended to study the conditions under different emission matrix of multiple spectral efficiency and symbol error rate of a closed system, analyze the different number of antennas, the performance under different emission matrix orthogonal space-time block codes condition detection algorithm. Platform: |
Size: 576512 |
Author:starcool |
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Description: Multiple Input Multiple Outputs, a wireless or radio communications technology normally used with OFDM for many wireless and radio communications. Multiple-input multiple-output, or MIMO, is a radio communications technology or RF technology that is being mentioned and used in many new technologies these days. Wi-Fi, LTE (3G long term evolution) and many other radio, wireless and RF technologies are using the new MIMO wireless technology to provide increased link capacity and spectral efficiency combined with improved link reliability using what were previously seen as interference paths. Even now many there are many MIMO wireless routers on the market, and as this RF technology is becoming more widespread, more MIMO routers and other items of wireless MIMO equipment will be seen. Platform: |
Size: 129024 |
Author:nebiyu |
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Description: Multiple Input Multiple Outputs, a wireless or radio communications technology normally used with OFDM for many wireless and radio communications. Multiple-input multiple-output, or MIMO, is a radio communications technology or RF technology that is being mentioned and used in many new technologies these days. Wi-Fi, LTE (3G long term evolution) and many other radio, wireless and RF technologies are using the new MIMO wireless technology to provide increased link capacity and spectral efficiency combined with improved link reliability using what were previously seen as interference paths. Even now many there are many MIMO wireless routers on the market, and as this RF technology is becoming more widespread, more MIMO routers and other items of wireless MIMO equipment will be seen. Platform: |
Size: 579584 |
Author:nebiyu |
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Description: Much of the initial excitement about MIMO systems
was due to pioneering work by Winters [132], Foschini [29], and Telatar [113] predicting remarkable
capacity growth for wireless systems with multiple antennas when the channel exhibits rich scattering
and its variations can be accurately tracked. This initial promise of exceptional spectral efficiency almost
“for free” resulted in an explosion of research and commercial activity to characterize the theoretical
and practical issues associated with MIMO systems. Platform: |
Size: 275456 |
Author:nebiyu |
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Description: FBMC transmitter offers low power and high speed than the OFDM transmitter.Spectral efficiency is high. sidelobe problem is eliminated by using filter bank. Platform: |
Size: 418816 |
Author:paramu |
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Description: 基于大规模MIMO 基本架构，探讨了信道建模和系统性能分析、信道状态信
息获取技术、多用户上下行无线传输技术等大规模MIMO 传输关键技术；认为利用
大规模阵列天线的多用户多输入多输出（MIMO）传输，将显著提升无线通信系统的
频谱效率及功率效率。(Based on the basic architecture of large-scale MIMO, channel modeling, system performance analysis and channel state information are discussed Information acquisition technology, multi-user upstream and downstream wireless transmission technology and other key technologies of large-scale MIMO transmission;Think that using Multi-user multi-input multi-output (MIMO) transmission of large-scale antenna arrays will significantly improve the performance of wireless communication systems Spectral efficiency and power efficiency.) Platform: |
Size: 199680 |
Author:legend27 |
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Description: 目前，以空间调制(Spatial Modulation，SM)、广义空间调制(Generalized Spatial Modulation，GSM)为代表的新型MIMO技术，成为4G以及5G的关键技术。空间调制系统在一个符号周期内，发送端只选择部分发送天线发送信号，从而大大提高了频谱效率，是大规模MIMO系统的重大突破。(At present, the new MIMO technology represented by spatial modulation (SM) and generalized spatial modulation (GSM) has become the key technology of 4G and 5g. In a symbol period, the transmitter only selects part of the antenna to transmit the signal, which greatly improves the spectral efficiency. It is a major breakthrough in large-scale MIMO systems.) Platform: |
Size: 1024 |
Author:zpy1 |
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Description: Massive MIMO is widely touted as an enabling technology for 5th generation (5G) mobile communications and beyond. On paper, the large excess of base station (BS) antennas promises unprecedented spectral efficiency gains. Unfortunately,during the initial phase of industrial testing, a practical challenge arose which threatens to undermine the actual deployment of massive MIMO: user mobility-induced channel Doppler. Platform: |
Size: 1395404 |
Author:zhedongtzdt@163.com |
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Search - MIMO spectral efficiency