Provided by: International Journal of Engineering Sciences & Research Technology (IJESRT)
Date Added: Mar 2014
Orthogonal Frequency Division Multiplexing (OFDM) is used for wideband data communications over mobile radio FM channels, High-bit-rate Digital Subscriber Lines (HDSL, 1.6Mbps), Asymmetric Digital Subscriber Lines (ADSL, up to 6Mbps), Very-high-speed Digital Subscriber Lines (VDSL, 100Mbps), Digital Audio Broadcasting (DAB), and High Definition TeleVision (HDTV) terrestrial broadcasting. The OFDM system has a high Peak-to-Average Power Ratio (PAPR) that can cause unwanted saturation in the power amplifiers. In order to avoid nonlinear distortion, highly linear amplifiers are required which cause a severe reduction in power efficiency.