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Massive MIMO has potential to offer massive throughputs by mounting a large number of antennas at the base station. One of the major limitations of massive MIMO is the cost of a huge number of RF chains. Antenna Selection is a promising signal processing technique which reduces the number of required RF chains while keeping the system's performance at a certain minimum level. In this paper, we investigate...
This paper considers an adaptive beamforming algorithm for a massive MIMO system with multiple cells. The pilot contamination problem arises in multi-cell systems owing to transmission of the same pilots from users (or mobile stations) in different cells. The focus of this paper is to study the impact of different training sequences on pilot contamination in Massive MIMO systems. Specifically, we...
Most of the search engines search for keywords to answer the queries from users. The search engines usually search web pages for the required information. However they filter the pages from searching unnecessary pages by using advanced algorithms. These search engines can answer topic wise queries efficiently and effectively by developing state-of-art algorithms. However they are vulnerable in answering...
We have focused on a particular mechanism of providing network security: firewall technology. Firewalls provide a false sense of security because they have inherent flaws that are continuously exploited by hackers. Current firewalls lack in providing adequate security against insiders. Literature suggests that these limitations arise from the deficiencies in firewall design. This paper presents a...
Semantic Web is a succession of the current world wide web in which all the contents, resources and services over the web will have well-defined meanings. Due to this well-defined semantics, semantic web will enable the automated processing of web contents by machines. To achieve this vision; a number of methodologies, tools and standards for semantic web have been proposed during last few years....
Semantic Web is an initiative towards transforming the current world-wide-web such that contents over the web can be understood and processed by machines. Ontology is one of the vital components of semantic web. It provides the vocabulary of a particular domain so that web contents can be easily comprehend by machines. Over the years, a number of tools like Protégé, WebODE and Ontolingua have emerged...
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