Subcarrier PIC Scheme for High Capacity CI/MC-CDMA System with Variable Data Rates

2009 ◽  
Author(s):  
Santi P. Maity ◽  
Mithun Mukherjee
Keyword(s):  
High Capacity ◽  
Cdma System ◽  
Data Rates ◽  
Variable Data

scholarly journals Latency-Aware Offloading in Integrated Satellite Terrestrial Networks

2020 ◽  
Author(s):  
Wiem Abderrahim ◽  
Osama Amin ◽  
Mohamed-Slim Alouini ◽  
Basem Shihada
Keyword(s):  
Communication Networks ◽  
Rural Areas ◽  
Access Network ◽  
High Capacity ◽  
High Load ◽  
Traffic Load ◽  
Satellite Systems ◽  
High Data ◽  
Data Rates ◽  
Terrestrial Networks

Next-generation communication networks are expected to integrate newly-used technologies in a smart way to ensure continuous connectivity in rural areas and to alleviate the traffic load in dense regions. The prospective access network in 6G should hinge on satellite systems to take advantage of their wide coverage and high capacity. However, adopting satellites in 6G could be hindered because of the {additional latency introduced}, which is not tolerable by all traffic types. Therefore, we propose a traffic offloading scheme that integrates both the satellite and terrestrial networks to smartly allocate the traffic between them while satisfying different traffic requirements. Specifically, the proposed scheme offloads the Ultra-Reliable Low Latency Communication (URLLC) traffic to the terrestrial backhaul to satisfy its stringent latency requirement. However, it offloads the enhanced Mobile Broadband (eMBB) traffic to the satellite since eMBB needs high data rates but is not always sensitive to delay. Our scheme is shown to reduce the transmission delay of URLLC packets, decrease the number of dropped eMBB packets, and hence improve the network's availability. Our findings highlight that the inter-working between satellite and terrestrial networks is crucial to mitigate the expected high load on the limited terrestrial capacity.<br>

scholarly journals 3G Long Term Evolution Baseband Processing with Application-Specific Processors

2009 ◽  
Vol 2009 ◽  
pp. 1-13 ◽  
Author(s):  
Perttu Salmela ◽  
Juho Antikainen ◽  
Teemu Pitkänen ◽  
Olli Silvén ◽  
Jarmo Takala
Keyword(s):  
Software Defined Radio ◽  
High Capacity ◽  
Long Term Evolution ◽  
Sphere Decoding ◽  
Interprocessor Communication ◽  
Term Evolution ◽  
Data Rates ◽  
Universal Mobile Telecommunications System ◽  
Application Specific

Data rates in the upcoming 3G long term evolution (LTE) standard will be manifold when compared to the current universal mobile telecommunications system. Implementing receivers conforming with the high-capacity transmission techniques is challenging due to the complexity and computational requirements of algorithms. In this study, the software defined radio (SDR) is targeted and the four essential baseband functions of the 3G LTE receiver, namely, list sphere decoding, fast Fourier transform, QR decomposition, and turbo decoding, are addressed and the functions are implemented as application specific processors (ASPs). As a result, the design space that describes the essential computational challenges of 3G LTE receivers is clarified and estimates of area, power, and interprocessor communication buffer requirements are presented.

scholarly journals Atmospheric Propagation Of SubTHz Waves And Space, 6G & 7G Communications

2021 ◽  
Vol 2015 (1) ◽  
pp. 012084
Author(s):  
Lesnov Ilya ◽  
Vdovin Vyacheslav
Keyword(s):  
High Capacity ◽  
Signal Propagation ◽  
Low Noise ◽  
High Signal ◽  
Atmospheric Conditions ◽  
Frequency Range ◽  
Actual Problem ◽  
Atmospheric Propagation ◽  
Data Rates ◽  
Wireless Telecommunication

Abstract The work is devoted to the actual problem of data rate of wireless telecommunication channels. Presented analysis of the telecommunication channel subterahertz (subTHz) frequency range - as the most promising band for the implementation of wireless telecommunications for space links and terrestrial cellular communications of high capacity. A channel considered as a combination of high effective transponder / transmitter duplex together with an open high dissipative atmospheric line. The means to achieve a high signal / noise ratio is usage of low-noise cryogenic receivers. The theoretical analysis of data rates for various atmospheric conditions and technical implementations of communication channels demonstrated reasonable limits of cooling of receivers, providing a weighty increase channel capacity, while deeper cooling is impractical due to weather restrictions in certain ranges and conditions of signal propagation, including altitude and seasonal features.

scholarly journals Multi-hope relay based high capacity energy efficient model for ultra wideband communication system

2017 ◽  
Vol 7 (1.5) ◽  
pp. 118
Author(s):  
B. Rajanna ◽  
P. Chandrashrkar ◽  
K. KishanRao
Keyword(s):  
Spectral Density ◽  
Bit Error Rate ◽  
Error Rate ◽  
Communication Systems ◽  
High Capacity ◽  
Ultra Wideband ◽  
Green Communication ◽  
Coverage Area ◽  
Data Rates ◽  
Ultra Wideband Communication

Demanding large bandwidth and signal robustness over a short distance, ultra wideband communication systems plays an important role. UWB systems exhibits very low spectral density, implies that the interference to narrowband systems is very small. The relay based communication has the advantages of coverage extension, range extension, increase data rates and green communication. The relay based communication with UWB frequency is used to increase the coverage area by using of relays and increasing the data rates by increasing SNR of the links using multi-hop communication. In this paper, capacity and bit error rate of relay based UWB system for indoor and outdoor channel models are analyzed. key Terms—UWB, green communication, multi-hop, capacity, bit error rate, spectral density.

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