Forums

Low SNR receiver design

Started by commsignal December 6, 2012
Hi All,
   I would be very grateful if some experts can give me their opinions
about the following questions (from algorithmic perspective).

(1) What has been/can be a good approach to a single carrier receiver
design (synchronization, channel estimation, equalization, etc.) operating
at low SNRs? How would you go about frquency, timing, phase synchronization
and equalization algorithms?
(3) What are the practical Es/No limits below which known algorithms simply
don't work?
(4)   Finally, how important can the role of decoders be in something like
iterative decoding and synchronization?

Thank you.
"commsignal" <58672@dsprelated> wrote in message 
news:pNWdnSbWhfI_pV3NnZ2dnUVZ_rOdnZ2d@giganews.com...
> Hi All, > I would be very grateful if some experts can give me their opinions > about the following questions (from algorithmic perspective). > > (1) What has been/can be a good approach to a single carrier receiver > design (synchronization, channel estimation, equalization, etc.) operating > at low SNRs? How would you go about frquency, timing, phase > synchronization > and equalization algorithms? > (3) What are the practical Es/No limits below which known algorithms > simply > don't work? > (4) Finally, how important can the role of decoders be in something like > iterative decoding and synchronization? > > Thank you.
> >"commsignal" <58672@dsprelated> wrote in message >news:pNWdnSbWhfI_pV3NnZ2dnUVZ_rOdnZ2d@giganews.com... >> Hi All, >> I would be very grateful if some experts can give me their opinions >> about the following questions (from algorithmic perspective). >> >> (1) What has been/can be a good approach to a single carrier receiver >> design (synchronization, channel estimation, equalization, etc.)
operating
>> at low SNRs? How would you go about frquency, timing, phase >> synchronization >> and equalization algorithms? >> (3) What are the practical Es/No limits below which known algorithms >> simply >> don't work? >> (4) Finally, how important can the role of decoders be in something
like
>> iterative decoding and synchronization? >> >> Thank you. > > >
rude
On Dec 6, 9:24&#2013266080;am, "Vladimir Vassilevsky" <nos...@nowhere.com> wrote:
> "commsignal" <58672@dsprelated> wrote in message >
On 12/6/2012 9:48 AM, johan_mozart wrote:
>> >> "commsignal"<58672@dsprelated> wrote in message >> news:pNWdnSbWhfI_pV3NnZ2dnUVZ_rOdnZ2d@giganews.com... >>> Hi All, >>> I would be very grateful if some experts can give me their opinions >>> about the following questions (from algorithmic perspective). >>> >>> (1) What has been/can be a good approach to a single carrier receiver >>> design (synchronization, channel estimation, equalization, etc.) > operating >>> at low SNRs? How would you go about frquency, timing, phase >>> synchronization >>> and equalization algorithms? >>> (3) What are the practical Es/No limits below which known algorithms >>> simply >>> don't work? >>> (4) Finally, how important can the role of decoders be in something > like >>> iterative decoding and synchronization? >>> >>> Thank you. >> >> >> > > rude
I'm not clear on what you are saying. Which is rude, the OP's asking someone to do his homework/test or Vlad's STUPIDENT comment? I think they both fall into the same category myself. Rick
If I know less about something, I ask a question. If someone doesn't like
the question, s/he simply shouldn't respond. What is the benefit of showing
someone how high you stand? 

I have seen much simpler questions than this being answered by reasonable
folks here. And all I needed here was just some educated comments.



>On 12/6/2012 9:48 AM, johan_mozart wrote: >>> >>> "commsignal"<58672@dsprelated> wrote in message >>> news:pNWdnSbWhfI_pV3NnZ2dnUVZ_rOdnZ2d@giganews.com... >>>> Hi All, >>>> I would be very grateful if some experts can give me their
opinions
>>>> about the following questions (from algorithmic perspective). >>>> >>>> (1) What has been/can be a good approach to a single carrier receiver >>>> design (synchronization, channel estimation, equalization, etc.) >> operating >>>> at low SNRs? How would you go about frquency, timing, phase >>>> synchronization >>>> and equalization algorithms? >>>> (3) What are the practical Es/No limits below which known algorithms >>>> simply >>>> don't work? >>>> (4) Finally, how important can the role of decoders be in something >> like >>>> iterative decoding and synchronization? >>>> >>>> Thank you. >>> >>> >>> >> >> rude > >I'm not clear on what you are saying. Which is rude, the OP's asking >someone to do his homework/test or Vlad's STUPIDENT comment? > >I think they both fall into the same category myself. > >Rick >
commsignal <58672@dsprelated> wrote:
> If I know less about something, I ask a question. If someone doesn't like > the question, s/he simply shouldn't respond. What is the benefit of showing > someone how high you stand?
> I have seen much simpler questions than this being answered by reasonable > folks here. And all I needed here was just some educated comments.
You get used to him after a while, and pretty often he does make good suggestions. -- glen
On Dec 20, 12:15&#2013266080;am, glen herrmannsfeldt <g...@ugcs.caltech.edu>
wrote:

> > You get used to him after a while, and pretty often he does make > good suggestions. >
No Glen, I don't get used to him after awhile. Dave
"Dave" <dspguy2@netscape.net> wrote:
On Dec 20, 12:15 am, glen herrmannsfeldt <g...@ugcs.caltech.edu>
wrote:

>> You get used to him after a while, and pretty often he does make >> good suggestions.
>No Glen, I don't get used to him after awhile.
You just have to quit being stupident. That's all it takes.
On Dec 20, 9:59&#2013266080;am, "Vladimir Vassilevsky" <nos...@nowhere.com>
wrote:  Nothing worth remembering