Abstract: Orthogonal Frequency Division Multiplexing (OFDM) is a Frequency Division Multiplexing (FDM) technique used as a digital multi-carrier modulation method. A large number of closely spaced sub carriers which are orthogonal are used to carry data on several parallel data streams. OFDM uses the spectrum efficiently compared to Frequency Division Multiple Access (FDMA) by spacing the channels much closer and creating all the carriers orthogonal to one another. Due to rapid growth of wireless and multimedia communication, there is a tremendous need for high-speed data transmission. Telecommunication industry provides variety of services ranging from voice to multimedia data transmissions, in which speed ranges several Kbps to Mbps. Existing system, may fail to support high speed efficient data transmission. To improve the speed and maximum amount of data transmission Orthogonal Frequency Division Multiplexing (OFDM) system may be used. Orthogonality of the carriers prevents interference between the closely spaced carriers and provides high bandwidth efficiency. This work focuses on design and implementation of OFDM transmitter and receiver.
Keywords: OFDM, FPGA, Orthogonality, IFFT.