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Table 1 Simulation parameters

From: M-ary nonlinear sine chirp spread spectrum for underwater acoustic communication based on virtual time-reversal mirror method

Type of chirp

Time period of chirp (ms)

Frequency bands (Hz)

Time bandwidth product \(BT_{s}\) (sHz)

Depth of source (m)

Depth of receiver (m)

Distance between Tx and Rx (km)

Data rate (bps)

Half cycle sine chirp

10 ms

5000–4100

8000–7100

12,000–11,100

16,000–15,100

9 sHz

40 m

30 m

1 km

300 bps

Half cycle sine chirp

10 ms

5000–4560

8000–7560

12,000–11,560

16,000–15,560

4.4 sHz

40 m

30 m

1 km

300 bps

Half cycle sine chirp

5 ms

5000–3200

8000–6200

12,000–10,200

16,000–14,200

9 sHz

40 m

30 m

1 km

600 bps

Half cycle sine chirp

5 ms

5000–4120

8000–7120

12,000–11,120

16,000–15,120

4.4 sHz

40 m

30 m

1 km

600 bps

Full cycle Sine chirp

10 ms

5000–4135

8000–7135

12,000–11,135

16,000–15,135

8.65 sHz

40 m

30 m

1 km

300 bps

Full cycle sine chirp

10 ms

5000–4450

8000–7450

12,000–11,450

16,000–15,450

5.5 sHz

40 m

30 m

1 km

300 bps

Full cycle sine chirp

5 ms

5000–3270

8000–6270

12,000–10,270

16,000–14,270

8.65 sHz

40 m

30 m

1 km

600 bps

Full cycle sine chirp

5 ms

5000–3900

8000–6900

12,000–10,900

16,000–14,900

5.5 sHz

40 m

30 m

1 km

600 bps

Linear chirp

10 ms

5000–4100

8000–7100

12,000–11,100

16,000–15,100

9 sHz

40 m

30 m

1 km

300 bps

Linear chirp

10 ms

5000–4560

8000–7560

12,000–11,560

16,000–15,560

4.4 sHz

40 m

30 m

1 km

300 bps

Linear chirp

5 ms

5000–3200

8000–6200

12,000–10,200

16,000–14,200

9 sHz

40 m

30 m

1 km

600 bps

Linear chirp

5 ms

5000–4120

8000–7120

12,000–11,120

16,000–15,120

4.4 sHz

40 m

30 m

1 km

600 bps