نتایج جستجو برای: تکنیک های mimo

تعداد نتایج: 502242  

2016
Amar Prakash Jyoti Sumita Mishra

Massive MIMO is also known as very-large MIMO (VLMIMO) and large scale antenna systems (LSAS), Hyper MIMO (HMIMO), Full dimension MIMO (FDMIMO) is advance techniques that potentially can offered the large network capacities in multi-user circumstances. With a massive MIMO system, we consider the case where a base station equipped with a large number of antennas elements instantaneously serves t...

Journal: :IEICE Transactions 2015
Takefumi Hiraguri Kentaro Nishimori

Multiple-input multiple-output (MIMO) transmission is attracting interest for increasing the transmission rates of wireless systems. This paper surveys MIMO transmission technology from the viewpoints of transmission methods, access control schemes, and total transmission efficiency. We consider wireless local area networks (WLAN) systems that use MIMO technology; moreover, we focus on multiuse...

Journal: :IEEE Trans. Signal Processing 2001
Chong-Yung Chi Chii-Horng Chen

Tugnait and Chi and Chen proposed multi-input multi-output inverse filter criteria (MIMO-IFC) using higher order statistics for blind deconvolution of MIMO linear time-invariant systems. This paper proposes three properties on the performance of the MIMO linear equalizer associated with MIMO-IFC for any signal-to-noise ratio, including P1) perfect phase equalization property, P2) a relation to ...

2012
Abbas Mohammadi Fadhel M. Ghannouchi

This practical resource offers a thorough examination of RF transceiver design for MIMO communications. Offering a practical view on MIMO wireless systems, this book extends fundamental concepts on classic wireless transceiver design techniques to MIMO transceivers. This helps reader gain a very comprehensive understanding of the subject. This in-depth volume describes many theoretical and impl...

Journal: : 2022

سابقه و هدف: جنگل­ های زاگرس به ­عنوان یکی از بوم ­سازگان­ جنگلی مهم ایران پوشش­ گیاهی (درختان، درختچه ­ها گونه­ علفی) متنوعی برخوردار می­ باشد. شناسایی آگاهی دقیق نقش ­شناختی آنها در این ­سازگان تواند حفاظت منابع طبیعی توسعه پایدار کمک شایانی نماید. به‌منظور مطالعه تنوع گونه‌ای گیاهان چوبی ذخیره کربن خاک رابطه با عوامل فیزیوگرافیک (جهت، شیب ارتفاع سطح دریا)، رویشگاه کیکم (var. cinerascens Acer...

2011
Sirichai Hemrungrote Toshikazu Hori Kentaro Nishimori

Multiple-Input Multiple-Output (MIMO) and Multi-User MIMO (MU-MIMO) systems are expected to improve the channel capacity over the limited bandwidth of existing wireless communication networks. The effects on the channel capacity characteristics of Single-User MIMO (SU-MIMO) systems in urban scenarios have been previously studied. In this paper, we first clarify that the larger number of antenna...

2009
Sami GHNIMI Ali GHARSALLAH

A blind Adaptive Space-Time Lifted Multiple-Input Multiple-Output (ASTL-MIMO) multiuser receiver is proposed for multipath MIMO channel estimation and multiuser detection of MIMO DS-CDMA systems in a realistic outdoor channel. An iterative and robust ASTL-MIMO Beamformer is employed to estimate the multipath MIMO channel parameters. For each iteration, the tracking mode with consideration of MI...

2009
Fang Shu Li Lihua Zhang Ping

A general stochastic spatial MIMO channel model is proposed for evaluating various MIMO techniques in this paper. It can generate MIMO channels complying with various MIMO configurations such as smart antenna, spatial diversity and spatial multiplexing. The modeling method produces the stochastic fading involving delay spread, Doppler spread, DOA (direction of arrival), AS (angle spread), PAS (...

2001
Bojan Vrcelj P. P. Vaidyanathan

Channel equalization is an important step in most applications of digital communications. In this paper we consider the equalization of Multiple Input Multiple Output (MIMO) channels. To that end we derive the theory of MIMO biorthogonal partners, a concept that has already been introduced (only in the scalar case) by the authors. We develop conditions for the existence of an FIR MIMO biorthogo...

2003
André L. F. de Almeida João C. M. Mota Francisco R. P. Cavalcanti

In this work we assess performance of multiple-input multiple-output (MIMO) antenna systems with space-time processing over a frequency-selective channel in presence of time-dispersive co-channel interference. We evaluate the performance of the conventional MIMO-decision-feedback equalizer (MIMO-DFE) receiver and also propose a low complexity receiver, based on the decoupled interference cancel...

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