A Novel Multiplexing Method for High Data Rate Communication Systems

2006 ◽  
Author(s):  
Yassin Elhillali ◽  
Charles Tatkeu ◽  
Atika Rivenq ◽  
J. Rouvaen
Keyword(s):  
Communication Systems ◽  
Data Rate ◽  
High Data Rate ◽  
High Data

PAPR REDUCTION IN MIMO SC-FDMA- A SURVEY

2015 ◽  
Vol 2 (2) ◽  
Author(s):  
HARSHA PRAKASH ◽  
C.D. SURIYAKALA
Keyword(s):  
Power Amplifier ◽  
Communication Systems ◽  
Multiple Access ◽  
Average Power ◽  
Data Rate ◽  
High Data Rate ◽  
Modulation Method ◽  
Frequency Division ◽  
High Data ◽  
Power Amplifier Efficiency

To meet the requirements of high data rate, third generation partnership project (3GPP) has come across the development of long term evolution (LTE). High data rate can be achieved with the help of an advanced modulation method. Orthogonal Frequency Division Multiple Access (OFDMA) was considered as a modulation method especially in the downlink of the communication systems. It gives many advantages like frequency diversity, increased capacity and robustness against impulse noise. Besides these advantages, a major drawback of OFDMA is its high peak-to-average power ratio (PAPR). High PAPR affects the system by lowering the power amplifier efficiency, increased complexity as well as shorter battery life. In case of uplink communication, where better peak power characteristics benefit the mobile terminals with respect to power efficiency, OFDMA is not a possible solution. To handle such situations, 3GPP has introduced a modified form of OFDMA which is known as Single-Carrier Frequency Division Multiple Access (SC-FDMA). It provides same advantages as OFDMA along with low PAPR. To further improve the bit error rate (BER) performance of the system and power amplifier efficiency Multiple-Input Multiple-Output (MIMO) can be extended to SC-FDMA system. This paper surveys causes, effects and possible solutions of high PAPR in a communication system.

Generic Graphene Based Components and Circuits for Millimeter Wave High Data-rate Communication Systems

MRS Advances ◽  
2017 ◽  
Vol 2 (58-59) ◽  
pp. 3559-3564
Author(s):  
Omid Habibpour ◽  
Wlodzimierz Strupinski ◽  
Niklas Rorsman ◽  
Pawel Ciepielewski ◽  
Herbert Zirath
Keyword(s):  
Millimeter Wave ◽  
Circuit Design ◽  
Integrated Circuit ◽  
Communication Systems ◽  
Epitaxial Graphene ◽  
Data Rate ◽  
Device Fabrication ◽  
High Data Rate ◽  
Integrated Circuit Design ◽  
High Data

ABSTRACT We are developing millimeter wave (mm-wave) components and circuits based on hydrogen-intercalated graphene. The development covers epitaxial graphene growth, device fabrication, modelling, integrated circuit design and fabrication, and circuit characterizations. The focus of our work is to utilize the distinctive graphene properties and realize new components that can overcome some of the main challenges of existing mm-wave technologies in term of linearity.

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