Problem
1. The composition of a TDMA frame permits the use of a single-carrier frequency for both forward and reverse transmissions of information-bearing signals. Describe how such a two-way communication can be accomplished.
2. A TDMA frame uses a preamble of np bits, N time slots, and nr trail bits. Each time slot contains rtli trail bits, nG guard bits, ?Is synchronization and channel estimation bits, and n1 information-bearing bits. Derive formulas for
(a) the framing efficiency n of the system and
(b) the size of a TDMA frame.