Ofdm transmitter and receiver

1. What is OFDM transmitter and receiver?
2. What is OFDM transmitter?
3. Which operation is performed at the transmitter of an OFDM system?
4. Why FFT is used in OFDM transmitter?

What is OFDM transmitter and receiver?

An OFDM signal consists of a number of closely spaced modulated carriers. When modulation of any form – voice, data, etc. is applied to a carrier, then sidebands spread out either side. It is necessary for a receiver to be able to receive the whole signal to be able to successfully demodulate the data.

What is OFDM transmitter?

In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a type of digital transmission and a method of encoding digital data on multiple carrier frequencies.

Which operation is performed at the transmitter of an OFDM system?

The inverse fast Fourier transform can therefore be used to realise the basic OFDM signal at the transmitter and the FFT can be used to recover (de-multiplex) the symbols at the receiver.

Why FFT is used in OFDM transmitter?

Implementation of OFDM deals with application of Fast Fourier Transform (FFT) to modulation and demodulation processes to generate carriers orthogonal to each other. In conventional system, IFFT (Inverse Fast Fourier Transform) is used at transmitter side and FFT is used in receiver side.