What is OFDM?
A12 : Orthogonal Frequency Division Multiplexing is an FDM modulation technique for transmitting large amounts of digital data over a radio wave. OFDM basically splits the radio signal into multiple smaller sub-signals that are then transmitted simultaneously at different frequencies to the receiver. OFDM reduces the amount of crosstalk in signal transmissions. 802.11a and the upcoming 802.11g WLAN technology uses OFDM.
Orthogonal frequency division multiplexing (OFDM) is a transmission technology for wireless communication. In the OFDM method, the radio signal is split into multiple smaller signals. These smaller signals are transmitted at the same time at different frequencies of 5GHz band. OFDM is more resistant to interferences than FHSS and DSSS technology. The 802.11a standard of wireless transmission uses OFDM method for communication.
Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation technique. It achieves high speed data rates, prevents interference, and overcomes multi-path signals. It also allows communications in areas where non-line-of-sight (NLOS) is a limiting factor for other wireless deployments. Although OFDM technology is not new, it is an innovative technique that has recently become commercially available in the US.
Orthogonal frequency-division multiplexing, or OFDM, is a process of digital modulation that is used in computer technology today. Essentially, OFDM is configured to split a communication signal in several different channels. Each of these channels is formatted into a narrow bandwidth modulation, with each channel operating at a different frequency. The process of OFDM makes it possible for multiple channels to operate within close frequency levels without impacting the integrity of any of the data transmitted in any one channel. The history of OFDM goes back to the 1960’s. At the time, there was a need to make more efficient use of bandwidth transmissions without creating situations where signals would be subject to a phenomenon referred to as crosstalk. Essentially, crosstalk occurs when two audio sources are broadcasting at the same time. The end result is that the message of each broadcast is partially obscured for anyone attempting to listen to either of the messages. Crosstalk ca
