Can you explain me in a easy way what the use of Cyclic Prefix in OFDM is? [duplicate]

1. What do you mean by cyclic prefix in OFDM system and explain the advantages of using cyclic prefix in OFDM signals?
2. What do you mean by cyclic prefix?
3. How many OFDM symbols are in one slot for normal cyclic prefix?
4. What is cyclic prefix used for in OFDM?

What do you mean by cyclic prefix in OFDM system and explain the advantages of using cyclic prefix in OFDM signals?

Use of cyclic prefix is a key element of enabling the OFDM signal to operate reliably. The cyclic prefix acts as a buffer region or guard interval to protect the OFDM signals from intersymbol interference.

What do you mean by cyclic prefix?

In telecommunications, the term cyclic prefix refers to the prefixing of a symbol, with a repetition of the end.

How many OFDM symbols are in one slot for normal cyclic prefix?

There are seven OFDM symbols per slot for a normal cyclic prefix (six in the case of an extended cyclic prefix). In each of those seven OFDM symbols, a length-12 sequence, obtained by phase rotation of the cell-specific sequence as described earlier, is transmitted.

What is cyclic prefix used for in OFDM?

The purpose of the cyclic prefix is to combat ISI and intra-symbol interference. The cyclic prefix is a guard time made up of a replica of the time-domain OFDM waveform. The basic premise is to replicate part of the back of the OFDM signal to the front to create the guard period, as shown in Figure 3.31.