Which of the following options about the format of the LTE random-access preamble is correct? (Multiple choice)
A . Format 4 can only be used in TDD cells
B . Format 0-3 can be used for FDD cells, and can also be used for TDD cells.
C . Format 4 can be used for TDD cells and can also be used for FDD cells.
D . Format 0-3 can only be used for FDD cells
Answer: AB