نتایج جستجو برای: سیستم mimo
تعداد نتایج: 92460 فیلتر نتایج به سال:
Low Complexity Frequency Domain Equalization of MIMO Channels with Applications to MIMO-CDMA Systems
CDMA and MIMO-CDMA systems using RAKE receivers are heavily limited by selfand multiple-accessinterference. Linear equalization is a means to remove this interference, however it is often not practical due to the enormous complexity, especially in the MIMO case. This paper presents an approach to greatly reduce the complexity of linear MIMO equalizers. It discusses the complexity reduction of t...
-The data rates and the supported range in communication systems, can be increased using MIMO (Multiple input and multiple output) technique. MIMO technique uses multiple antennas at both transmitter and receiver. MIMO systems uses Orthogonal frequency division multiplexing (OFDM) technique for multicarrier modulation. QR decomposition (QRD) is the first step in the decoding of the MIMO receive...
Location distinction is defined as determining when a device has changed its position. Previous work [4], [8] has shown that a wireless network can be exploited to successfully perform location distinction by measuring the characteristics of the SISO radio channel between the wireless device and one or more receivers. We propose methods and metrics for MIMO-based location distinction. Using a l...
In recent years, multiple-input multiple output (MIMO) radar has been widespread concern in the domestic and foreign researchers. Bistatic radar draws on the great success of MIMO technology in the communications field and it has many advantages over conventional radar. In this paper, the direction angles estimations of bistatic MIMO radar are researched. To contrast traditional radar DOA estim...
Multiple-input multiple-output (MIMO) technology constitutes a breakthrough in the design of wireless communication systems, and is already at the core of several wireless standards. Exploiting multi-path scattering, MIMO techniques deliver significant performance enhancements in terms of data transmission rate and interference reduction. This book is a detailed introduction to the analysis and...
This paper presents and compares antenna selection strategies for frequency selective MIMO-OFDM channels. Real channels are measured, and used to evaluate performance. Results for simulated TGn channel models are also presented. We show that the capacity gain predicted from the simulated channels, is significantly lower than can be achieved over real channels. This supports the use of antenna s...
We address the capacity limits of sizeconstrained multi-input multi-output (MIMO) arrays. While most work on MIMO focuses on arrays with of a small number of sufficiently spaced, low correlated antenna elements, we look at the case where a fixed small space is being filled up with antenna elements. We obtain a dense MIMO system whose rate performance is analyzed. We establish capacity limits an...
This paper presents achievements of an on-going activity where the applicability of MIMO to satellite communications with Digital Video Broadcasting – Satellite services to Handhelds as the key application is studied. The potential satellite and hybrid satellite-terrestrial MIMO scenarios are described, and the applicable MIMO schemes for each scenario are selected. The performance of the MIMO ...
در این پایان نامه، هدف اصلی بحث درباره نقش الگوریتم های مختلف آشکارسازی در عملکرد سیستم های مخابراتیmimo است. بنابراین، در ابتدا مدل عمومی و کلی این سیستم ها معرفی شده است و سپس مزایای بهکارگیری آنها در مخابرات بیسیم بیان گردیده است. تمرکز اصلی این پایان نامه بر روی الگوریتم های آشکارسازی است که برای دمدولاسیون داده های ارسالی از آنتن های فرستنده به کار می روند و برای تحلیل، از مدل عمومی پیش تر...
Multiple-input multiple-output (MIMO) techniques allow remarkable improvements in the reliability and/or transmission rate of wireless communication systems. However, there are several major challenges towards the implementation of conventional MIMO concept in terminals with size, cost, and power constraints. First of all, insufficient space impedes the design of efficient and decorrelated MIMO...
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