FPGA Central

My group is working on a project where we need to improve the SNR of
64QAM RF channel. It is 6.4 MHz wide and the center frequency can be a
high as 82 MHz. How do we go about selecting a DSP for this project? O
what would be a good DSP to use? We want to avoid doing an hardwar
development, so ideally we would like to use a DSP development kit. An
suggestions?

On 11/12/2009 1:05 PM, Kevin100 wrote:
> My group is working on a project where we need to improve the SNR of a
> 64QAM RF channel. It is 6.4 MHz wide and the center frequency can be as
> high as 82 MHz. How do we go about selecting a DSP for this project? Or
> what would be a good DSP to use? We want to avoid doing an hardware
> development, so ideally we would like to use a DSP development kit. Any
> suggestions?

Without knowing how you're going to sample the signal, or what sample
rate you might use, or a rough estimate of how many MIPS your process
might take, I think it'd be pretty tough to even take a wild guess.

--
Eric Jacobsen
Minister of Algorithms
Abineau Communications
http://www.abineau.com

Kevin100 wrote:
> My group is working on a project where we need to improve the SNR of a
> 64QAM RF channel.

How can you imrove the SNR of a channel?

> It is 6.4 MHz wide and the center frequency can be as
> high as 82 MHz. How do we go about selecting a DSP for this project? Or
> what would be a good DSP to use?

This is likely to be out of league of programmable DSPs. Consider FPGA.

> We want to avoid doing an hardware
> development, so ideally we would like to use a DSP development kit. Any
> suggestions?

Find a different project.


Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com

>On 11/12/2009 1:05 PM, Kevin100 wrote:
>> My group is working on a project where we need to improve the SNR of a
>> 64QAM RF channel. It is 6.4 MHz wide and the center frequency can b
as
>> high as 82 MHz. How do we go about selecting a DSP for this project?
Or
>> what would be a good DSP to use? We want to avoid doing an hardware
>> development, so ideally we would like to use a DSP development kit.
Any
>> suggestions?
>
>Without knowing how you're going to sample the signal, or what sample
>rate you might use, or a rough estimate of how many MIPS your process
>might take, I think it'd be pretty tough to even take a wild guess.
>
>--
>Eric Jacobsen
>Minister of Algorithms
>Abineau Communications
>http://www.abineau.com
>

Eric,

The sampling rate will be 170 Msps. And the latency needs to be less tha
50 microseconds. When we began this project the idea was to use an Analo
Devices ADC (AD9430, 12 bit), followed by an FPGA and and then a DAC.
However in order to speed things up I was wondering if there wer
development kits available with all these components on one board.

Thanks!
Kevin

>
>
>Kevin100 wrote:
>> My group is working on a project where we need to improve the SNR of a
>> 64QAM RF channel.
>
>How can you imrove the SNR of a channel?
>
>> It is 6.4 MHz wide and the center frequency can be as
>> high as 82 MHz. How do we go about selecting a DSP for this project?
Or
>> what would be a good DSP to use?
>
>This is likely to be out of league of programmable DSPs. Consider FPGA.
>
>> We want to avoid doing an hardware
>> development, so ideally we would like to use a DSP development kit.
Any
>> suggestions?
>
>Find a different project.
>
>
>Vladimir Vassilevsky
>DSP and Mixed Signal Design Consultant
>http://www.abvolt.com
>


The sampling rate needs to be >170 Msps and we need 12 bit resolution, an
<50 microsecond latency. If I understand you right, there are no DS
development kits that can operate at these speeds? I mean a kit with
ADC, FPGA, and DAC all on one board.

Thanks,
Kevin

>
>
>Kevin100 wrote:
>> My group is working on a project where we need to improve the SNR of a
>> 64QAM RF channel.
>
>How can you imrove the SNR of a channel?
>
>> It is 6.4 MHz wide and the center frequency can be as
>> high as 82 MHz. How do we go about selecting a DSP for this project?
Or
>> what would be a good DSP to use?
>
>This is likely to be out of league of programmable DSPs. Consider FPGA.
>
>> We want to avoid doing an hardware
>> development, so ideally we would like to use a DSP development kit.
Any
>> suggestions?
>
>Find a different project.
>
>
>Vladimir Vassilevsky
>DSP and Mixed Signal Design Consultant
>http://www.abvolt.com
>


The sampling rate needs to be >170 Msps and we need 12 bit resolution, an
<50 microsecond latency. If I understand you right, there are no DS
development kits that can operate at these speeds? I mean a kit with
ADC, FPGA, and DAC all on one board.

Thanks,
Kevin

Kevin100 wrote:
>>
>>Kevin100 wrote:
>>
>>>My group is working on a project where we need to improve the SNR of a
>>>64QAM RF channel.

> Any suggestions?
>>
>>Find a different project.
>>
>
> The sampling rate needs to be >170 Msps and we need 12 bit resolution, and
> <50 microsecond latency. If I understand you right, there are no DSP
> development kits that can operate at these speeds? I mean a kit with a
> ADC, FPGA, and DAC all on one board.

There are quite a few FPGA/DSP/ADC/DAC boards intended for SDR. You
won't like the cost though.

VLV

"Kevin100" <kgadkari@gmail.com> writes:

> My group is working on a project where we need to improve the SNR of a
> 64QAM RF channel.

The only ways I know to improve the SNR of the channel are to increase
transmit power, increase the transmit antenna gain, or increase the
receive antenna gain. I don't think DSP will help.
--
Randy Yates % "With time with what you've learned,
Digital Signal Labs % they'll kiss the ground you walk
mailto://yates@ieee.org % upon."
http://www.digitalsignallabs.com % '21st Century Man', *Time*, ELO

On Thu, 12 Nov 2009 15:49:50 -0600, Kevin100 wrote:


>>
>>Kevin100 wrote:
>>> My group is working on a project where we need to improve the SNR of a
>>> 64QAM RF channel.
>>
>>How can you imrove the SNR of a channel?
>>
>>> It is 6.4 MHz wide and the center frequency can be as
>>> high as 82 MHz. How do we go about selecting a DSP for this project?
> Or
>>> what would be a good DSP to use?
>>
>>This is likely to be out of league of programmable DSPs. Consider FPGA.
>>
>>> We want to avoid doing an hardware
>>> development, so ideally we would like to use a DSP development kit.
> Any
>>> suggestions?
>>
>>Find a different project.
>>
>>
>>Vladimir Vassilevsky
>>DSP and Mixed Signal Design Consultant http://www.abvolt.com
>>
>>
>
> The sampling rate needs to be >170 Msps and we need 12 bit resolution,
> and <50 microsecond latency. If I understand you right, there are no
> DSP development kits that can operate at these speeds? I mean a kit
> with a ADC, FPGA, and DAC all on one board.
>
See what the FPGA vendors have. Most folks hear "DSP" and assume you
mean a DSP chip, not an FPGA.

Terms are misleading...

--
www.wescottdesign.com