DSP-based underwater acoustic modem

Hello. first of all I have to present myself, this is my first post on this
board. I'm an electrical engineer from Spain.
I have very short experience with DSPs, that's why I use this discussion
board to learn abot that.

We need to develop an underwater acoustic modem for data transmission
between underwater sensor nodes. I have been investigating different
approaches to the problem. The sensors will be battery based, so low power
consumption is a must. For underwater communications, we will use FSK
modulation with 22Khz carriers, due to its simple theory and good behaviour
for the water channel.

In that way, I have been considering on basing the modem on a DSP. I have
seen basic modems that are based on single chip transceivers or even on
microcontrollers. Is the most common approach to use a DSP for the modem? I
have seen the TMS320C5x series that can fit our low power requirements.
Seems that the dsk evaluation boards are good starting points.

If some of you can give me some inputs on this starting project I would be
very grateful. I hope I can learn a lot from this discussion board during
my project.

Thanks and sorry about my baad english.

Tomeu

On Dec 17, 7:07&#4294967295;am, "Tomeu" <to...@marexi.com> wrote:
> Hello. first of all I have to present myself, this is my first post on this
> board. I'm an electrical engineer from Spain.
> I have very short experience with DSPs, that's why I use this discussion
> board to learn abot that.
>
> We need to develop an underwater acoustic modem for data transmission
> between underwater sensor nodes. I have been investigating different
> approaches to the problem. The sensors will be battery based, so low power
> consumption is a must. For underwater communications, we will use FSK
> modulation with 22Khz carriers, due to its simple theory and good behaviour
> for the water channel.
>
> In that way, I have been considering on basing the modem on a DSP. I have
> seen basic modems that are based on single chip transceivers or even on
> microcontrollers. Is the most common approach to use a DSP for the modem? I
> have seen the TMS320C5x series that can fit our low power requirements.
> Seems that the dsk evaluation boards are good starting points.
>
> If some of you can give me some inputs on this starting project I would be
> very grateful. I hope I can learn a lot from this discussion board during
> my project.
>
> Thanks and sorry about my baad english.
>
> Tomeu

So far it sounds reasonable, although if you are new to DSP software
development, you'll have quite a bit of learning to do.  You may want
to get a book specifically on programming DSPs for real-time
applications,
I think TI had several.