Table 2.

Parameter used in frame-based adaptive modulation during tank experiment.

Bandwidth	$B$ = 4 kHz
Number of subcarriers	$K_s$ = 512
Subcarrier spacing	$f_{sc}$ = 7.8 Hz
Length of OFDM symbol	$T$ = 128 ms
Length of CP	$T_{cp}$ = 25 ms
Number of pilot subcarriers	$K_p$ = 128
Number of data subcarriers	$K_d$ = 325
Number of null subcarriers	$K_n$ = 59