نتایج جستجو برای: سیستم mimo

تعداد نتایج: 92460  

Journal: :CoRR 2013
P. Raviteja T. Lakshmi Narasimhan Ananthanarayanan Chockalingam

In this paper, we propose algorithms for signal detection in large-scale multiuser spatial modulation multipleinput multiple-output (SM-MIMO) systems. In large-scale SMMIMO, each user is equipped with multiple transmit antennas (e.g., 2 or 4 antennas) but only one transmit RF chain, and the base station (BS) is equipped with tens to hundreds of (e.g., 128) receive antennas. In SM-MIMO, in a giv...

Journal: :J. Sel. Topics Signal Processing 2009
Gerald Matz A. Robert Calderbank Christoph F. Mecklenbräuker Ayman F. Naguib Emanuele Viterbo

A DECADE has passed since the pioneering works in which multiple-input multiple-output (MIMO) wireless systems have been introduced. By using multiple antennas at both link ends, MIMO in theory offers tremendous rate and reliability gains. These promises have spurred an extraordinary amount of research activities. By now, MIMO has become a well-established research topic, with thousands of pape...

2017
Mr. A. Dileep M. Silvi Sheba

Now a day’s wireless channels effecting due to fading is the main issue in communications. MIMO techniques enable higher spectral efficiency and improve robustness against channel fading. In this paper an effort has been made to illustrate the performance comparison of the Rayleigh & Rician fading channel models for MIMO system using MATLAB simulation. The Water filling algorithm has been imple...

2012
Charinsak Saetiaw Saksit Summart Chanchai Thongsopa

Recently, many works have considered a physical properly of antenna in MIMO channel models, such as radiation pattern effective for MIMO system. However, effect of antenna for MIMO with different algorithms is required and also with different environments of signal behavior at each end of the link. Thus, a traditional antenna such as Omni-directional antenna generally is used to design MIMO sys...

Journal: :Wireless Personal Communications 2016
Joy Iong-Zong Chen Chi-Tsung Huang

The channel correlation happens in a MIMO-femtocell (multiple-input multiple-� output) system with beam-subset beamforming technique is investigated in this paper.� MIMO-femtocell system constructed with MIMO signaling that is adapted to a tiered� femtocellular network. The MIMO-femtocell system deployed with home base station� (BS) in a single floor indoor environment is proposed. According to...

Journal: :EURASIP J. Wireless Comm. and Networking 2007
Konstantinos P. Liolis Athanasios D. Panagopoulos Panayotis G. Cottis

This paper investigates the applicability of multiple-input multiple-output (MIMO) technology to satellite communications at the Ku-band and above. After introducing the possible diversity sources to form a MIMO matrix channel in a satellite environment, particular emphasis is put on satellite diversity. Two specific different topics from the field of MIMO technology applications to satellite c...

2010
DAVIDE CESCATO

Multiple-input multiple-output (MIMO) techniques, characterized by the use of multiple antennas at both the transmitter and the receiver, are a key element in the design of future wireless communication systems. With respect to single-antenna systems, MIMO systems offer higher spectral e ciency through spatial multiplexing gain, improved link reliability through spatial diversity gain, and grea...

2010
Kentaro NISHIMORI Riichi KUDO Naoki HONMA Yasushi TAKATORI Masato MIZOGUCHI

Multi-user multiple input multiple output (MU-MIMO) systems have attracted much attention as a technology that enhances the total system capacity by generating a virtual MIMO channel between a base station and multiple terminal stations. Extensive evaluations are still needed because there are many more system parameters inMU-MIMO than in single user (SU)-MIMO and the MU-MIMO performance in act...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - پژوهشکده برق و کامپیوتر 1391

فرآیند ارسال ویدئو چالشی است که برای بهبود کیفیت آن تلاش های بسیاری شده است. بدین منظور در یک بخش از سیستم های چند ورودی- چند خروجی(mimo) برای بهره گیری از ویژگی این سیستم ها و بهبود عملکرد فرآیند ارسال ویدئو سود می جویند و در بخش دیگر با استفاده از ویژگی های خود ویدئو کیفیت ارسال را بهبود می بخشند. استفاده از مشخصات کانال mimo و تحلیل خود سیگنال ویدئو با دو روش تبدیل موجک و تشخیص لبه به عنوان ...

Journal: :Signal Processing Systems 2011
Michael Wu Yang Sun Siddharth Gupta Joseph R. Cavallaro

Multiple-input multiple-output (MIMO) significantly increases the throughput of a communication system by employing multiple antennas at the transmitter and the receiver. To extract maximum performance from a MIMO system, a computationally intensive search based detector is needed. To meet the challenge of MIMO detection, typical suboptimal MIMO detectors are ASIC or FPGA designs. We aim to sho...

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