Answer only Suppose an OFDM sub channel consists of 24 data

Suppose an OFDM sub channel consists of 24 data subcarriers with 1 data symbol per subcarrier. The UL slot comprises 1 sub channel times 3 OFDM symbol periods The DL slot comprises 1 sub channel times 2 OFDM symbol periods. Thus, there are 72 data symbols per slot for the UL and 48 symbols for the DL. There are more pilot subcarriers (for synchronization) on the UL (8) than the DL (4). The DL can support higher modulation, such as 64-Q.AM with a 5/6 coding rate compared with the UL, which can reliably support 16-QAM with a 3/4 coding rate. Compute the maximum DL and UL bit rates.

Solution

at 5MHz system bandwidth
maximum Downlink data rate 15.84Mbit/sec (64-QAM 5/6 coding rate).
maximum uplink data rate 6.85Mbit/sec (16-QAM 3/4 coding rate).