Spectrum Efficiency Analysis and Adaptive Transceiver Design for Single-Carrier Multiuser Transmission

2015 ◽  
Vol 64 (8) ◽  
pp. 3566-3577 ◽  
Author(s):  
Wei Peng ◽  
Fumiyuki Adachi ◽  
Xiaodong Wang ◽  
Tao Jiang
2019 ◽  
Vol 8 (4) ◽  
pp. 10587-10591

The fifth era of portable correspondence frameworks (5G) guarantees uncommon degrees of availability and nature of administration (QoS) to fulfill the unremitting development in the quantity of versatile savvy gadgets and the colossal increment in information request. One of the essential ways 5G organize innovation will be practiced is through arrange densification, to be specific expanding the quantity of radio wires per site and sending littler and littler cells. Gigantic MIMO, where MIMO represents numerous info various yield, is generally expected to be a key empowering agent of 5G. This innovation use a forceful spatial multiplexing, from utilizing countless transmitting/accepting reception apparatuses, to duplicate the limit of a remote channel. Such an appropriated engineering gives extra large scale decent variety, and the co-handling at numerous APs completely smothers the between cell obstruction. Contingent upon moderate/quick channel blurring conditions, a few creators recommended versatile LMS, RLS and NLMS based channel estimators, which either require factual data of the channel or are not proficient enough as far as execution or calculations. So as to conquer the above impacts, the work centers around the QR-RLS based channel estimation technique for Massive MIMO frameworks with various regulation plan.


1991 ◽  
Vol 27 (5) ◽  
pp. 423 ◽  
Author(s):  
R. Prasad ◽  
A. Kegel ◽  
J. Olsthoorn

2013 ◽  
Vol 462-463 ◽  
pp. 615-618 ◽  
Author(s):  
Peng Zhang ◽  
Le Nan Wu

In order to realize multi-carrier transmission of MPPSK modulation, a method was proposed after analyzing the cause of the internal channel interference (ICI) among multi MPPSK signals. The ICI was eliminated by reducing the modulation order of each MPPSK signal to a certain level and modulating MPPSK signals to different parts of a same symbol cycle. The information rates of single carrier modulation and multi-carrier modulation were compared to illustrate the role of order reduction. The BER performances of single carrier modulation and multi-carrier modulation were also carried out by simulations. Results show that: the proposed method can achieve MPPSK multi-carrier transmission, with higher information rate than that with single carrier modulation and no BER performance loss, which is expected to be an available scheme for improving spectrum efficiency.


2020 ◽  
Vol 14 (5) ◽  
pp. 818-829
Author(s):  
Ahmed Abdelaziz Salem ◽  
A.M. Benaya ◽  
Sayed El-Rabaie ◽  
Mona Shokair

Author(s):  
Vishnu Sharma ◽  
Vijay Singh Rathore

In these days most of the software development uses preexisting software components. This approach provides plenty of benefits over the traditional development. Most of the software industries uses their own domain based software libraries where components resides in the form of modules, codes, executable file, documentations, test plans which may be used as it is or with minor changes. Due to shrinking time and high demand of software development it is necessary to use pre tested software components to ensure high functionality in software developed. Software components can be used very easily and without having the worries of errors and bugs because these are developed under expert supervision and well tested. What we have to do is just embed these components in our project. In this paper a survey got conducted over 112 software developer,testers and freelancers. In survey several issues in CBSD were identified. An efficient repository along with a component search engine is developed. All the component retrieval techniques were evaluated and compared with precise and recall method.


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