Do we need a transmit and a receive filter in a OFDM transceiver system? [duplicate]

1. What is OFDM transmitter and receiver?
2. Which operation is performed at the transmitter of an OFDM system?
3. Why is OFDM effective in preventing interference between transmitting signals?
4. What is used in OFDM to transmit signals in parallel?

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.

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 is OFDM effective in preventing interference between transmitting signals?

In OFDM, several bits can be sent in parallel, or at the same time, in separate substream channels. This enables each substream's data rate to be lower than would be required by a single stream of similar bandwidth. This makes the system less susceptible to interference and enables more efficient data bandwidth.

What is used in OFDM to transmit signals in parallel?

OFDM is a frequency-division multiplexing (FDM) scheme that was introduced by Robert W. Chang of Bell Labs in 1966. In OFDM, multiple closely spaced orthogonal subcarrier signals with overlapping spectra are transmitted to carry data in parallel.