A Comparative Evaluation of Low-Complexity LAS Detection Algorithm for Massive MIMO Systems
Communications in computer and information science, 2020
For multiple-input multiple-output (MIMO) to work, both network and mobile devices need to be tig... more For multiple-input multiple-output (MIMO) to work, both network and mobile devices need to be tightly integrated. Now the requirements for the design of the 5G network, the MIMO becomes “massive” and exceedingly necessary for the deployment point of view. The main intention of our work is to generate as many potential solutions or outputs as we can select among the best one. We introduce low complexity detection algorithms into large scale MIMO systems where they can perform better than heuristic algorithms known in the literature, such as MIMO detection algorithms likelihood ascent search (LAS) detector. This contribution explains the potential for simple local search such as LAS for near-optimal performance in a large-scale antenna MIMO system. In this article, we analyze the behaviour of common indices used in the linear approach such as ZF and MMSE, to measure rates of convergence of error performance of a LAS algorithm and most importantly, observed execution time costs of all schemes. Simulation outcomes are presented to corroborate the study.
In the present study a series of new Pyridine based schiff bases were synthesized by natural acid... more In the present study a series of new Pyridine based schiff bases were synthesized by natural acid that was extracted from certain citrus fruits. By using a metal salt of NiCl 2 ×6H 2 O, CoCl 2 ×6H 2 O and Na 2 PdCl 4 to synthesized a metal complexes. Structure of these compounds were con rmed by standard study of MS, LC-MS, FTIR, 1 H NMR, 13 C NMR, TGA, UVspectroscopy. Antibacterial activity of synthesized molecules was tested against Gram-positive (S. aureus and E. faecalis) and Gram-negative (E. coli and P. aeruginosa) bacterial strains. Co (II), Ni (II) and Pd (II) metal complexes were used for the photocatalytic degradation of Ramazol brilliant blue R (RBBR) dye with the help of UV visible spectroscopy. The staphyloma concourses microbial structure was pre-processed for docking study using the AutoDock-Vina. The mentioned green chemistry techniques are economical, easy to understand, and give more effective extraction while showing maximum e ciency. Traditional chemical synthesis processes often produce vast amounts of waste, employ toxic or dangerous solvents, and release greenhouse gases into the atmosphere. One of the major categories of pollutants that are released from the industrial wastewater of the textile industry is organic dyes. Scientists seek innovative, nature-aligned approaches. Green chemistry has been used to carry out lot of chemistry transformations [1]. This innovative method changes the older paradigm. Nowadays, chemical reactions are being enhanced by natural aids [2][3]. Natural catalysts have recently been used to establish a new category of biocatalysts that can be used in a variety of synthetic organic reactions [4][5][6]. Even fruit juices are being used instead of harsh chemicals, making chemistry safer and more Earth-friendly [7]. Due to this signi cant the Pyridine based Schiff base reaction available fruits juice experiments have been planned to assess its application as a catalyst in the present study. Schiff base ligands play an important role in inorganic chemistry, readily available and easily forming stable complexes with most transition metal ions [8]. Aryl hydrazide-hydrazone occupy special place because transition metal complexes of these ligands developed due to their chelating capability, structural exibility, interesting electrical as well as magnetic properties [9] and pharmacological activities like antibacterial [10], antiviral [11], anticancer [12], antimalarial [13], antituberculosis [14]. The bioactivity of pyridine-based compounds may be increased by the coordination of certain metals with Schiff base ligands [15][16][17]. Because of its direct impact on high mortality and morbidity, antimicrobial resistance of bacterial pathogens is a key concern of the twenty-rst century. Bacteria develop resistance to commercially available antibiotics [18]. As a result, there is a severe scarcity of effective therapies and preventative strategies to address this de cit. This prompted various research organizations throughout the world to create innovative therapies and antibacterial medicines. This research interest on the synthesis of novel Pyridine based Schiff-base ligand and their derivatives using natural acid that was extracted from certain citrus fruits. The use of natural acid juices as bio and green-catalysts for organic synthesis is explored in this research paper as well as the synthesis and characterization of a new Co (II), Ni (II) and Pd (II) metal complex. We were testing antimicrobial activity in gram-positive and gram-negative bacteria and to execute molecular docking simulations, via the AutoDock-Vina was utilized. In addition, photocatalytic study of RBBR dye degradation on synthesized metal complexes is carried out [19][20]. All chemicals and solvents used were of analytical reagent grade and were used as such; distilled water was used throughout the experiments. 4-Nitro acetophenone, DMF-DMA, Thiophene-2-carboxaldehyde, Indole-3-carboxaldehyde, 2-
Copper selenide nanomaterials are recognized to possess thermoelectric characteristics, becoming ... more Copper selenide nanomaterials are recognized to possess thermoelectric characteristics, becoming a strong contender to unite materials science and energy technology with effective use in practical applications in extreme environments.
First-principles calculation of the electronic structure, elastic and optical properties of LiSn2N3 nitrogen base stable perovskite semiconductor material
Numerical results for "Dynamic evolution of induced subduction through the inversion of spre... more Numerical results for "Dynamic evolution of induced subduction through the inversion of spreading ridges".
Int'l J. of Communications, Network and System Sciences, 2010
Adaptive Modulation and Coding (AMC), which is a technology used when channel condition changes, ... more Adaptive Modulation and Coding (AMC), which is a technology used when channel condition changes, is adapted in Mobile Worldwide Interoperability for Microwave Access (WiMAX). Scalable Video Coding (SVC) is a video coding scheme used for different users with bandwidth level. SVC encodes a video into a number of layers. Users receive different number of encoded layers based on their channel condition. In this paper, Intermediate Control Server (ICS) is proposed to deal with the signaling between multimedia server and BS. Both AMC and SVC are employed to enhance the user perceived video quality in the system.
IEEE 802.16/WiMAX-based broadband wireless access and its application for telemedicine/e-health services
IEEE Wireless Communications, 2007
IEEE 802.16-based broadband and mobile wire-less access is expected to be a significant compo-nen... more IEEE 802.16-based broadband and mobile wire-less access is expected to be a significant compo-nent in the next-generation (eg, beyond third-generation, 3G) wireless systems [1]. The IEEE 802.16 standard, which incorporates sever-al advanced radio transmission ...
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