DPSK communication in underwater

[MynameNayface]

DPSK in underwater

Hello ,

Here is my question for which I am seeking a answer . I happened to read a paper on a DPSK communication scheme used in underwater communications .
In that particualr paper , they mention about the phase error .
The formula given in that paper for phase error is as follows ,

Y = tan^-1 [double derivative (Φ) / (2*pi*f)+single derivative of (Φ)] .

This paper gives no explanation about how exactly the phase error can be calculated in detail . But from what i read from other books , the component Φ is given by ,

Φ = D * m(t) , where D is a phase modulation constant . and the m(t) being the modulating signal given by , A * cos(2*pi*f*t) .

Is my assumption of the Φ component correct ? . Or could somebody throw more light on how the phase error is calculated .

Regards
Mano .

p:s - The paper in question is " Parametric transmission of wideband signals " by Gerard Loubet , which is available online .

 

[mmoctar]

Re: DPSK in underwater

Hello I don't have the answer of your question, are you workin' on underwater system?
I'm workin on underwater ofdm system and I need to change with someone who know about underwater.

 

[teenu]

hai im planned to design an equalizer for under water communication can anybody help to construct ambient noise

 

[mhmdbehzad]

Yes by adding ricain multipath fading and awgn
refer icjsns and search for "coding in underwater communication paper"
auther:"masumeh karimi"