Spectral location of individual OFDM symbols

1. How many OFDM symbols are there?
2. What are OFDM symbols?
3. Which portion of OFDM symbol is prefixed to the OFDM symbol duration?
4. How many bits is an OFDM symbol?

How many OFDM symbols are there?

The number of OFDM symbols per slot is 14 for a configuration using normal cyclic prefix. For extended cyclic prefix, the number of OFDM symbols per slot is 12.

What are OFDM symbols?

Orthogonal frequency division multiplexing (OFDM) takes a digital information signal with bit rate R_b, maps n-bit words on to M = 2ⁿ symbols (each symbol being a complex number representing the amplitude and phase of an M-ary modulation scheme), splits the resulting symbol stream (rate R_s = R_b/n) into N parallel ...

Which portion of OFDM symbol is prefixed to the OFDM symbol duration?

To combat the intersymbol interference (ISI) in a multipath channel, a cyclic prefix (CP) is inserted in the OFDM symbol. The CP refers to the cyclic extension of an OFDM symbol, that is, appending the last samples of the OFDM symbol to the front of the symbol as illustrated in Fig. 5.6.

How many bits is an OFDM symbol?

With 4 bit per symbol, 16-QAM, the maximum rises to 48 Mbps. Finally, using 64-QAM, which represents six bits of information with each symbol, the 12 megabaud channel is capable of 72 Mbps.