What is the recommended value of cyclic prefix for a standard signal in LTE?

Answer 1

Two sizes of CP defined
• Normal CP: Equivalent to 7 symbols per slot. In Normal CP, There are two different case, For first time symbol cp length have 160 time unit I.e (5.2 micro seconds) and 144 for symbol 2 to 7 I.e (4.7 microseconds).
• Extended CP: cp length is a duration of 16.67 microseconds. Equivalent to 6 symbols per slot.

Answer 2

If I correct , this answer is Normal Cyclic Prefix. In case of Normal Cyclic Prefix, one time slot is divided into 7 OFDM symbols and the duration per OFDM symbol is 4.7 microseconds.