FDM is the technique used to shift several base band signals to different higher frequencies, thus creating, in effect, a larger channel bandwidth because several signals can be sent over the same medium at the same time without interference with each other.
Frequency-division multiplexing, wavelength-division multiplexing, and time-division multiplexing.
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Orthogonal frequency division multiplexing is special case of frequency division multiplexing where a ling serial data streams are divided into parallel data streams and each data stream is multiplied either by orthogonal frequency or code. when multiplied by code known as frequency code division multiplexing and when multiplied by orthogonal frequency then know as orthogonal frequency division multiplexing
Frequency-division multiplexing and wavelength-division multiplexing
Orthogonal frequency-division multiplexing
In analog transmission, signals are commonly multiplexed using frequency-division multiplexing (FDM)
Multiplexing is the process of combining multiple signals over one media line. There are several types of multiplexing: frequency division, time division, and wavelength division.
AM radio broadcasting uses frequency division multiplexing to allocate different frequencies to different radio stations. Cable television systems use frequency division multiplexing to transmit multiple channels simultaneously over a single cable. Cell phone networks use frequency division multiplexing to separate different users' calls on the same frequency band.
disadvantages of wavelenth division multiplexing
Does Cable television use time-division multiplexing
Multiplexing techniques vary widely based on what is being multiplexed. Modern telecommunications use a very wide array of techniques including: TDM - examples: TDMA, T-carrier FDM - examples: DWDM Spatial - example: MIMO Code division - examples: CDMA Phase or polarization division - cable/satellite TV Statistcal - examples: packet mode (STS), FHSS etc etc. This is far from a complete list. I think the question needs to be more specific.
Frequency division multiplexing is when a communication medium divides its frequency in order to carry a number of different signals at once. Broadband DSL uses this to transport large amounts of data quickly.