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); % d denotes distance btween transmitter and receiver
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; %Khz
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
There are some errors in your formulations:
1. While calculating the TL, in the (absorption^d) expression, d should be km instead of meters.
2. Noise PDF can be approximated as 50-18*log10(f) where f in kHz.
3. Acoustic Power calculation is wrong due to the misleading usage of dB and ordinary scale.
4.PWreception depends on the modem platform that you are using. For WHOI Micromodem, PWreception is 1-3 Watts.
I suggest you to check the following two papers.
Conference Paper Energy-delay tradeoffs for Underwater Acoustic Sensor Networks
Article Packet Size Optimization for Lifetime Maximization in Underw...
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