Precoded IM-OFDM-SS for Underwater Acoustic Communication

Table 1

Experimental pool results.

No.	OFDM	IM-OFDM-SS Walsh	IM-OFDM-SS ZC	Proposed DCT Walsh	Proposed DCT ZC	Proposed DHT Walsh	Proposed DHT ZC
1	0.018	0.020	0.020	0.0038	0.0031	0.0035	0.0031
2	0.0096	0.0072	0.0061	0.0021	0.0022	0.0021	0.0021
3	0.027	0.0041	0.0035	0.0035	0.0035	0.0030	0.0033
4	0.026	0.023	0.022	0.0091	0.009	0.0093	0.0088
5	0.0072	0.0061	0.0065	0.00054	0.00052	0.00053	0.00054
Average	0.0176	0.0121	0.0116	0.0038	0.0037	0.0037	0.0036