What is spectrum?
Spectrum is a catch-all term for the radio airwaves that many wireless gizmos use to communicate information. Radios use spectrum, as do the rabbit-ear antennas on older television sets. The CBC, for example, is broadcast free to many parts of Canada using a part of the electromagnetic spectrum. Cellphones, of course, also use it. Spectrum is divided into different frequencies and measured in units called hertz.
Spectrum is a triennial exhibition of science and technology completely organized and hosted by students of the College of Engineering at the University of Saskatchewan in Saskatoon, Saskatchewan. Spectrum was first held in 1959 as a forum for students of the College of Engineering to present their design projects for friends, family, and faculty. Since then, the show has grown to include student and industrial exhibitors from across North America and has become known as “The largest student-run exhibition of science and technology in North America” consisting of a seven member Executive Committee, a Directorate of nearly 40, and a volunteer force of around 1,000 students. Cameco Spectrum 2004: “Foundations of Innovation” featured close to 70 student projects and 10 large industry displays and saw nearly 10,000 visitors in attendance including more than 3,800 elementary school-aged children who got to experience science and technology and learn about engineering in a way not possible i
Radio spectrum refers to a range of radio frequencies. The bandwidth of a radio signal is the difference between the upper and lower frequencies of the signal. For example, in the case of a voice signal having a minimum frequency of 200 hertz (Hz) and a maximum frequency of 3,000 Hz, the bandwidth is 2,800 Hz (3 KHz). The amount of bandwidth needed for 3G services could be as much as 15-20 Mhz, whereas for 2G services a bandwidth of 30-200 KHz is used. Hence, for 3G huge bandwidth is required. How is 3G different from 2G and 4G? While 2G stands for second-generation wireless telephone technology, 1G networks used are analog, 2G networks are digital and 3G (third-generation) technology is used to enhance mobile phone standards. 3G helps to simultaneously transfer both voice data (a telephone call) and non-voice data (such as downloading information, exchanging e-mail, and instant messaging. The highlight of 3G is video telephony. 4G technology stands to be the future standard of wireles
