Optimum Receiver Location for Ultra Wideband In-Body Communication Based on Channel Capacity Calculation

2017 ◽  
Author(s):  
Jan-Christoph Brumm ◽  
Gerhard Bauch
Keyword(s):  
Channel Capacity ◽  
Ultra Wideband ◽  
Capacity Calculation ◽  
Optimum Receiver

scholarly journals Range extension and channel capacity increase in impulse-radio ultra-wideband communications

2010 ◽  
Vol 15 (2) ◽  
pp. 169-173 ◽  
Author(s):  
Roberto Rodes ◽  
Xianbin Yu ◽  
Antonio Caballero ◽  
Jesper Bevensee Jensen ◽  
Timothy Braidwood Gibbon ◽  
...  
Keyword(s):  
Channel Capacity ◽  
Impulse Radio ◽  
Range Extension ◽  
Ultra Wideband ◽  
Capacity Increase ◽  
Wideband Communications

scholarly journals Компактная 4x4 MIMO антенна для UWB устройств с копланарным питанием и подавлением Wi-Fi и WLAN

2021 ◽  
Vol 64 (2) ◽  
pp. 108-116
Author(s):  
Анубхав Кумар
Keyword(s):  
Reflection Coefficient ◽  
Correlation Coefficient ◽  
Channel Capacity ◽  
Ultra Wideband ◽  
Diversity Gain ◽  
Impedance Bandwidth ◽  
Capacity Loss ◽  
Envelope Correlation

В статье представлена компактная MIMO антенна с питанием копланарным волноводом для UWB устройств. Четырехэлементная антенна с питанием копланарным волноводом выполнена в виде излучателя. Развязка между элементами с одинаковой поляризацией и ортогонально поляризованными элементами составляет более 20 и 25 дБ, соответственно. Дополнительный элемент используется для улучшения развязки на более высокой частоте. Смоделированная и измеренная ширина полосы пропускания предложенной широкополосной UWB (ultra wideband) MIMO антенны, определяемая по входному сопротивлению IBW (impedance bandwidth) по уровню 10 дБ, составляет от 3,6 до 10,3 ГГц. Для предложенной антенны также смоделированы и/или измерены коэффициент отражения, развязка, диаграммы направленности, коэффициент корреляции по огибающей ECC (envelope correlation coefficient), полный активный коэффициент отражения TARC (total active reflection coefficient), коэффициент передачи при приеме на разнесенные антенны DG (diversity gain) и потери по пропускной способности канала CCL (channel capacity loss). Получены значения коэффициентов ECC Ј 0,0022, DG > 9,9 дБ, TARC имеет минимальные отклонения при различных углах, а CCL < 0,4 бит/с/Гц при ширине полосы пропускания, определяемой по входному сопротивлению, по уровню 10 дБ. Данная антенна может быть использована в портативных UWB устройствах.

scholarly journals Characterization of Narrowband Noise and Channel Capacity for Powerline Communication in France

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3022 ◽  
Author(s):  
Imène Elfeki ◽  
Sébastien Jacques ◽  
Ismail Aouichak ◽  
Thierry Doligez ◽  
Yves Raingeaud ◽  
...  
Keyword(s):  
Channel Capacity ◽  
Smart Grids ◽  
Low Voltage ◽  
Powerline Communication ◽  
Medium Voltage ◽  
Time Frequency ◽  
Frequency Representation ◽  
Major Interest ◽  
Capacity Calculation ◽  
Advanced Metering

Narrowband powerline communication (NB-PLC) systems represent a key step for the real development of smart grids’ applications in the medium voltage (MV) and low voltage (LV) networks. This article sums up the results of a complete experimental measurement campaign aimed at investigating the low voltage NB-PLC channel in the frequency range from 9 to 500 kHz in various sites (i.e., rural, urban etc.) located in France. The noise features in time-frequency representation are studied at five different sites between the transformer substation and the smart electricity meter. The main contribution of this study consists in estimating the theoretical channel capacity which constitutes a major interest for the users and actors of the electrical system. The channel capacity calculation shows reliable results in the US Federal Communications Commission (FCC) band (a few Mbits/s). The quality of the communication in the FCC band enables to integrate new smart grids’ applications and services based on the existing NB-PLC communication for advanced metering infrastructure (AMI).

scholarly journals UWB-MIMO Antenna with Band-Notched Characteristics for Portable Wireless Systems

2020 ◽  
Author(s):  
Chandrasekhar Rao Jetti ◽  
Venkateswara Rao Nandanavanam
Keyword(s):  
Wireless Communication ◽  
Channel Capacity ◽  
Communication Systems ◽  
Multipath Fading ◽  
Link Quality ◽  
Ultra Wideband ◽  
Mimo Antenna ◽  
Input Multiple Output ◽  
Commercial Applications ◽  
Mimo Technology

The current and future wireless communication systems demand for higher data rates, enhanced quality of service and more channel capacity. Since Federal Communications Commission (FCC) allocated the unlicensed frequency spectrum from 3.1 to 10.6 GHz for commercial applications in the year 2002, Ultra-Wideband (UWB) technology has attained considerable attention because of its inherent features like high data rate, more channel capacity, extremely less power consumption and low cost. However, for UWB systems, multipath fading and frequency interference are the two significant issues that requires further investigation. In recent times, Multiple Input Multiple Output (MIMO) technology has gained much attention in wireless communication as it exploits multipath to increase the communication range and link quality. Thus, MIMO technology is a promising solution for mitigating multipath fading in UWB system. However, accommodating multiple antennas with less mutual coupling between them in portable devices is always a challenging task for antenna designers. UWB system could easily interfere with existing narrowband communication system such as Wireless Local Area Network (WLAN). So, the design of an ultra-wideband antenna with integrated frequency notching function is a good solution to suppress the frequency interference and to reduce the complexity of the UWB system instead of using a conventional filter. In this chapter, compact isolation-enhanced planar UWB-MIMO antenna with single band-notched characteristics is presented.

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