A simple and useful approach for the determination process of the weighted despreading sequences in a DS-CDMA system

2003 ◽  
Vol 14 (4) ◽  
pp. 361-366 ◽  
Author(s):  
Cebrail Ciftlikli ◽  
Ibrahim Develi
2002 ◽  
Vol 149 (5) ◽  
pp. 299-304 ◽  
Author(s):  
M.-Y. Liu ◽  
H.-W. Tsao

2014 ◽  
Vol 1 ◽  
pp. 662-665
Author(s):  
Hisashi Watanabe ◽  
Yuichi Omori ◽  
Mikio Hasegawa ◽  
Kazuyuki Aihara

2016 ◽  
Vol 75 (13) ◽  
pp. 1153-1165
Author(s):  
V. Noor Mohammed ◽  
M. Lakshmanan ◽  
M. Palanivelan ◽  
Ankur Kar ◽  
P. Tripathy
Keyword(s):  

Author(s):  
. Geetanjli

The power control in CDMA systems, grant numerous users to share resources of the system uniformly between each other, leading to expand capacity. With convenient power control, capacity of CDMA system is immense in contrast of frequency division multiple access (FDMA) and time division multiple access (TDMA). If power control is not achieved numerous problems such as the near-far effect will start to monopolize and consequently will reduce the capacity of the CDMA system. However, when the power control in CDMA systems is implemented, it allows numerous users to share resources of the system uniformly between themselves, leading to increased capacity For power control in CDMA system optimization algorithms i.e. genetic algorithm & particle swarm algorithm can be used which regulate a convenient power vector. These power vector or power levels are dogged at the base station and announce to mobile units to alter their transmitting power in accordance to these levels. The performances of the algorithms are inspected through both analysis and computer simulations, and compared with well-known algorithms from the literature.


2018 ◽  
Vol 412 ◽  
pp. 172-177 ◽  
Author(s):  
Danyang Chen ◽  
Jianping Wang ◽  
Jianli Jin ◽  
Huimin Lu ◽  
Lifang Feng

ICL Journal ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 67-105
Author(s):  
Markku Suksi

Abstract New Caledonia is a colonial territory of France. Since the adoption of the Nouméa Accord in 1998, a period of transition towards the exercise of self-determination has been going on. New Caledonia is currently a strong autonomy, well entrenched in the legal order of France from 1999 on. The legislative powers have been distributed between the Congress of New Caledonia and the Parliament of France on the basis of a double enumeration of legislative powers, an arrangement that has given New Caledonia control over many material fields of self-determination. At the same time as this autonomy has been well embedded in the constitutional fabric of France. The Nouméa Accord was constitutionalized in the provisions of the Constitution of France and also in an Institutional Act. This normative framework created a multi-layered electorate that has presented several challenges to the autonomy arrangement and the procedure of self-determination, but the European Court of Human Rights and the UN Human Rights Committee have resolved the issues regarding the right to vote in manners that take into account the local circumstances and the fact that the aim of the legislation is to facilitate the self-determination of the colonized people, the indigenous Kanak people. The self-determination process consists potentially of a series of referendums, the first of which was held in 2018 and the second one in 2020. In both referendums, those entitled to vote returned a No-vote to the question of ‘Do you want New Caledonia to attain full sovereignty and become independent?’ A third referendum is to be expected before October 2022, and if that one also results in a no to independence, a further process of negotiations starts, with the potential of a fourth referendum that will decide the mode of self-determination New Caledonia will opt for, independence or autonomy.


Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 273
Author(s):  
Yoshita Srivastava ◽  
Rachel Bonn-Breach ◽  
Sai Shashank Chavali ◽  
Geoffrey M. Lippa ◽  
Jermaine L. Jenkins ◽  
...  

RNA plays a central role in all organisms and can fold into complex structures to orchestrate function. Visualization of such structures often requires crystallization, which can be a bottleneck in the structure-determination process. To promote crystallization, an RNA-recognition motif (RRM) of the U1A spliceosomal protein has been co-opted as a crystallization module. Specifically, the U1-snRNA hairpin II (hpII) single-stranded loop recognized by U1A can be transplanted into an RNA target to promote crystal contacts and to attain phase information via molecular replacement or anomalous diffraction methods using selenomethionine. Herein, we produced the F37M/F77M mutant of U1A to augment the phasing capability of this powerful crystallization module. Selenomethionine-substituted U1A(F37M/F77M) retains high affinity for hpII (KD of 59.7 ± 11.4 nM). The 2.20 Å resolution crystal structure reveals that the mutated sidechains make new S-π interactions in the hydrophobic core and are useful for single-wavelength anomalous diffraction. Crystals were also attained of U1A(F37M/F77M) in complex with a bacterial preQ1-II riboswitch. The F34M/F37M/F77M mutant was introduced similarly into a lab-evolved U1A variant (TBP6.9) that recognizes the internal bulged loop of HIV-1 TAR RNA. We envision that this short RNA sequence can be placed into non-essential duplex regions to promote crystallization and phasing of target RNAs. We show that selenomethionine-substituted TBP6.9(F34M/F37M/F77M) binds a TAR variant wherein the apical loop was replaced with a GNRA tetraloop (KD of 69.8 ± 2.9 nM), laying the groundwork for use of TBP6.9(F34M/F37M/F77M) as a crystallization module. These new tools are available to the research community.


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