Howtosignalprocessing
- How is OFDM implemented in the real world?
- What is OFDM in communication system?
- How OFDM signal is generated?
- Which transform techniques can be used in OFDM transmitting and receiving systems?
How is OFDM implemented in the real world?
OFDM applications. Orthogonal frequency-division multiplexing is used in many technologies, including the following: Digital radio, Digital Radio Mondiale, and digital audio broadcasting and satellite radio. Digital television standards, Digital Video Broadcasting-Terrestrial/Handheld (DVB-T/H), DVB-Cable 2 (DVB-C2).
What is OFDM in communication system?
OFDM is a subset of frequency division multiplexing in which a single channel utilizes multiple sub-carriers on adjacent frequencies. In addition the sub-carriers in an OFDM system are overlapping to maximize spectral efficiency. Ordinarily, overlapping adjacent channels can interfere with one another.
How OFDM signal is generated?
In OFDM the signal itself is first split into independent channels, modulated by data and then re-multiplexed to create the OFDM carrier. OFDM is a special case of Frequency Division Multiplex (FDM). As an analogy, a FDM channel is like water flow out of a faucet, in contrast the OFDM signal is like a shower.
Which transform techniques can be used in OFDM transmitting and receiving systems?
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.
