I am interested in calculating transmission power in case of underwater sensor networks. I am calculating the transmit power as follows. Kindly suggest if my calculation is right. Moreover also suggest whether the values i am using i.e values for bandwidth, spreading etc are correct.

Absorption and transmission loss models for underwater sensor networks are given as follows.

**absorption=**10^((0.11*f^2/(1+f^2))+44*f^2/(4100+f^2))+2.75*10^(-4)*f^2+0.003))/10);

**TL=**(d^spreading)*(absorption^d);

Where the Power in dB and power in watts is calculated as follows

**AcousticPower=**NoisePDF*TL*Bandwidth*TargetSNR;

**TX_Power_in_watts=**(AcousticPower*10^(-17.2))/circuitefficiency;

The following values are being used.

f=25;

Bandwidth=1;

spreading=1.5;

TargetSNR=15.4120;

NoisePDF=10;

PWreception=1; **(kindly suggest if the value for reception power level(PWreception) is correct or not)**

Best Regard