scholarly journals LoS Theoretical and Experimental MIMO Study from 1–40 GHz in Indoor Environments

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1688
Author(s):  
Juan Pascual-García ◽  
Maria-Teresa Martinez-Ingles ◽  
Davy P. Gaillot ◽  
Leandro Juan-Llácer ◽  
Jose-Maria Molina-Garcia-Pardo
Keyword(s):  
Radio Channel ◽  
Multiple Input Multiple Output ◽  
Great Accuracy ◽  
Delay Spread ◽  
Indoor Environments ◽  
Received Power ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Indoor Scenarios ◽  
Tracing Techniques

In this work, line-of-sight multiple-input multiple-output (MIMO) measurements in the frequency range from 1 GHz to 40 GHz are presented for an indoor environment in the scope of new 5G bands. For the sake of comparison, the measured radio channels are reproduced with great accuracy using ray-tracing techniques by tuning all propagation mechanisms. The relative received power, root mean square of the delay spread (RMS DS) and K-factor provide an insight of how propagation behaves in indoor scenarios within a large and contiguous frequency band. Results show that a decay factor behaves nearly constant with frequency and the RMS DS is quite sensible to frequency. From these results, faithful one-slope 5G models are proposed. Finally, the contribution of the simulated propagation mechanisms to the radio channel is investigated which suggests that the simulation of the low-mmW radio channel can be simplified.

Field Programmable Gate Array Based Testbed for Investigating Multiple Input Multiple Output Signal Transmission in Indoor Environments

2009 ◽  
pp. 474-499
Author(s):  
Konstanty Bialkowski ◽  
Adam Postula ◽  
Amin Abbosh ◽  
Marek Bialkowski
Keyword(s):  
Field Programmable Gate Array ◽  
Signal Transmission ◽  
Multiple Input Multiple Output ◽  
Indoor Environments ◽  
Front End ◽  
Rf Front End ◽  
Multiple Input ◽  
Field Programmable ◽  
Input Multiple Output ◽  
Gate Array

This chapter introduces the concept of Multiple Input Multiple Output (MIMO) wireless communication system and the necessity to use a testbed to evaluate its performance. A comprehensive review of different types of testbeds available in the literature is presented. Next, the design and development of a 2×2 MIMO testbed which uses in-house built antennas, commercially available RF chips for an RF front end and a Field Programmable Gate Array (FPGA) for based signal processing is described. The operation of the developed testbed is verified using a Channel Emulator. The testing is done for the case of a simple Alamouti QPSK based encoding and decoding scheme of baseband signals.

Implementation of a MIMO system for Wireless Power Transfer Using Acoustic Approach

2016 ◽  
Vol 7 (3) ◽  
pp. 946 ◽  
Author(s):  
Thoriq Zaid ◽  
Shakir Saat ◽  
Norezmi Jamal ◽  
Siti Huzaimah Husin ◽  
Yusmarnita Yusof ◽  
...  
Keyword(s):  
Mimo System ◽  
Multiple Input Multiple Output ◽  
Power Converter ◽  
Acoustic Energy ◽  
Power Transfer ◽  
Wireless Power ◽  
Received Power ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Experimental Works

<span>This paper presents a development of Acoustic energy transfer (AET) system through the air medium by implementing a Multiple Input-Multiple Output (MIMO) arrangement of transducers to transmit energy. AET system allows power to be transmitted without wire connection. The MIMO system is proposed in this paper to increase the efficiency of the transmitting power by multiplying the received power. The simulation and experimental works are carried out using a Class E power converter and the obtained results are analyzed accordingly. Based on the experimental results, the 18.57mW output power is obtained at 40kHz operating frequency when triple transducer is used. It  contributes to 30.96% efficiency to the power transfer system.</span>

scholarly journals Interleaved-MIMO DAS for Indoor Radio Coverage: Guidelines for Planning

2014 ◽  
Vol 2014 ◽  
pp. 1-10
Author(s):  
E. M. Vitucci ◽  
F. Fuschini ◽  
V. Degli-Esposti ◽  
L. Tarlazzi
Keyword(s):  
Radio Channel ◽  
Multiple Input Multiple Output ◽  
Channel Measurements ◽  
Deployment Strategy ◽  
Indoor Coverage ◽  
Indoor Radio ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Coverage Extension ◽  
The Impact

The combination of distributed antenna systems (DAS) and multiple input multiple output (MIMO) schemes opens the way to a variety of coverage solutions for indoor environment. In this paperinterleaved-MIMO (i-MIMO) DASindoor coverage extension strategies are studied. Their performance in high-order MIMO cases is investigated in realistic conditions through LTE-A link-level simulations, based on statistical data extracted from radio channel measurements; the impact of the deployment strategy on performance is then evaluated and useful planning guidelines are derived to determine the optimum deployment for a given propagation environment.

scholarly journals Empirical Modeling of Radiowave Angular Power Distributions in Different Propagation Environments at 60 GHz for 5G

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 365 ◽  
Author(s):  
Manuel García Sánchez ◽  
Edgar Lemos Cid ◽  
Ana Vázquez Alejos
Keyword(s):  
Power Distribution ◽  
Radio Channel ◽  
Multiple Input Multiple Output ◽  
Empirical Modeling ◽  
60 Ghz ◽  
Channel Models ◽  
High Data ◽  
Received Power ◽  
Data Rates ◽  
Input Multiple Output

The design of 5th generation (5G) wireless systems requires the description and modeling of the radio channel where communication will take place. As 5G will employ massive multiple input–multiple output (MIMO) to cope with the high data rates, the channel models should include the description of radiowave angular power distribution (APD) around the terminals. In this paper, we present the results of a measurement campaign of these APDs in four different environments and provide their main parameters. This will facilitate the incorporation of these results into current 5G channel models. We also analyze the maximum received power improvement that could be achieved by combining the power reaching the terminal from different angles and provide the improvement values for the four scenarios. The research was conducted at 60 GHz, one of the frequency bands proposed for 5G systems.

scholarly journals Channel Modelling for Multiprobe Over-the-Air MIMO Testing

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Pekka Kyösti ◽  
Tommi Jämsä ◽  
Jukka-Pekka Nuutinen
Keyword(s):  
Channel Model ◽  
Radio Channel ◽  
Multiple Input Multiple Output ◽  
Anechoic Chamber ◽  
Geometric Description ◽  
Channel Modelling ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Specific Mapping ◽  
Wave Synthesis

This paper discusses over-the-air (OTA) test setup for multiple-input-multiple-output (MIMO) capable terminals with emphasis on channel modelling. The setup is composed of a fading emulator, an anechoic chamber, and multiple probes. Creation of a propagation environment inside an anechoic chamber requires unconventional radio channel modelling, namely, a specific mapping of the original models onto the probe antennas. We introduce two novel methods to generate fading emulator channel coefficients; the prefaded signals synthesis and the plane wave synthesis. To verify both methods we present a set of simulation results. We also show that the geometric description is a prerequisite for the original channel model.

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