A Review Paper on Growth and Utilization of White Space Technology

摘要

In this paper we have discussed that how adaptable access of TV Band white spaces in VHF/UHF can be used in rural areas to provide internet at suitable cost. The document provides an overview for the present and future aspects of “White Space Technology”. TVWS technology appealing for industry because it can travel longer distances and more easily through walls than the bands used by other wireless technologies like as Bluetooth and Wi- Fi. It is expected that the opening of white space technology will direct increase of spectrum utilization efficiency in highly attractive frequency bands. To avoid the interference between, the white space devices are designed to detect over the air digital TV signals. To avoid the channel interference Florida University developed a smart TV band white space identifier. This device is able to sense and avoid interference from white space devices to air DTV. The University of Strathclyde also used white space internet connection in place of Wi- Fi. In this paper we study the accessibility of TV white spaces in different countries and discuss the advantages of white space over the Wi-Fi and other generation techniques. The white space technology provides an alternative to cellular infrastructure or cable and we also discuss the limitations of this technology. The white-Fi Space reduces the time to detect transmission in variable channel width system by analyzing raw signals in the time domain. It also provides an insight into how this technology can be beneficial for India. But because of analog TV transmission this transmission is not yet used in India.