Virtual Time-Inverse OFDM Underwater Acoustic Channel Estimation Algorithm Based on Compressed Sensing

Table 1

Parameter of the UAC OFDM system.

Item	Parameter
Sampling rate,	48 kHz
Bandwidth,	6 kHz
OFDM symbol period	85.33 ms
IFFT points,	4096
Number of carriers	512
Protection interval,	25 ms
Frequency interval,	11.72 Hz
Modulation	QPSK