OFDM modulator in LTE

1. What is OFDM modulator?
2. What is the OFDM technique used in LTE?
3. How does OFDM modulation work?
4. Is OFDM used in 4G?

What is OFDM modulator?

The OFDM Modulator Baseband block applies Orthogonal Frequency Division Multiplexing modulation to an incoming data signal. The output is a baseband representation of the OFDM modulated signal.

What is the OFDM technique used in LTE?

OFDM is a form of transmission that uses a large number of closely spaced carriers that are modulated with low rate data. Normally these signals would be expected to interfere with each other, but by making the signals orthogonal to each another there is no mutual interference.

How does OFDM modulation work?

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.

Is OFDM used in 4G?

Orthogonal frequency division multiplexing (OFDM) is an emerging technology in wireless communication system. It is a multi-carrier transmission and suggested for 4G network. It has advantages like efficient deal with multi-path propagation, robust against ICI and efficient use of bandwidth.