Basics of ofdm

1. What are the basic features of OFDM?
2. What is OFDM and how it works?
3. How does OFDM transmit data?
4. What are the main strengths of OFDM?

What are the basic features of OFDM?

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 OFDM and how it works?

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. Demodulation is based on fast Fourier transform algorithms.

How does OFDM transmit data?

The data to be transmitted on an OFDM signal is spread across the carriers of the signal, each carrier taking part of the payload. This reduces the data rate taken by each carrier. The lower data rate has the advantage that interference from reflections is much less critical.

What are the main strengths of OFDM?

What are the main strengths of OFDM? - By dividing the channel into narrowband flat fading subchannels, OFDM is more resistant to frequency selective fading than single carrier systems are. - Eliminates ISI and IFI through use of a cyclic prefix.