Editing Electrical engineering (section)

===Telecommunications===
{{Main|Telecommunications engineering}}
[[File:Erdfunkstelle Raisting 2a.jpg|thumb|right|[[Satellite dish]]es are a crucial component in the analysis of satellite information.]]
Telecommunications engineering focuses on the [[transmission (telecommunications)|transmission]] of information across a [[communication channel]] such as a [[coax cable]], [[optical fiber]] or [[free space optical communications|free space]].{{sfn|Tobin|2007|p=15}} Transmissions across free space require information to be encoded in a [[carrier signal]] to shift the information to a carrier frequency suitable for transmission; this is known as [[modulation]]. Popular analog modulation techniques include [[amplitude modulation]] and [[frequency modulation]].{{Sfn|Chandrasekhar|2006|p=21}} The choice of modulation affects the cost and performance of a system and these two factors must be balanced carefully by the engineer.

Once the transmission characteristics of a system are determined, telecommunication engineers design the [[transmitter]]s and [[receiver (radio)|receiver]]s needed for such systems. These two are sometimes combined to form a two-way communication device known as a [[transceiver]]. A key consideration in the design of transmitters is their [[power consumption]] as this is closely related to their [[signal strength]].{{sfn|Smith|2007|p=19}}{{sfn|Zhang|Hu|Luo|2007|p=448}} Typically, if the power of the transmitted signal is insufficient once the signal arrives at the receiver's antenna(s), the information contained in the signal will be corrupted by [[signal noise|noise]], specifically static.