Spectrum technologies

Spectrum technology includes all forms of technology that use invisible radio frequencies, which are used to transmit wireless signals. These wireless signals are used in telecommunication and radiocommunication technologies, such as Bluetooth, WiFi, 1/2/3/4/5G networks, radar and Low-Frequency Array (LOFAR). Wireless signals cannot be seen with the human eye, seen that electromagnetic, acoustic and electrical signals are used. 

Various techniques, such as frequency hopping, time scrambling, and direct sequence spreading are forms of spread spectrum, in which signals are transmitted in a bandwidth that is greater than the frequency of the original information. Signals are used in a larger bandwidth in order to secure communications, prevent detection and create a barrier against natural interferences such as noise and jamming. There is a continues development of new connection types with specific qualities, like with the development of next generation mobile networks. There are also threats against spectrum technologies, a signal may be spoofed or jammed, have interference induction or radiation, but also be eavesdropped on, intercepted or sessions may be hijacked. 

Related keywords: Time-hopping spread spectrum (THSS), chirp spread spectrum (CSS), Frequency-hopping spread spectrum (FHSS), Direct-sequence spread spectrum (DSSS), frequency domain, multi-access communications, spoofing, man in the middle