[hpsdr] 8 receivers

[Steven Doyle]

I can't take any credit for that, I think it was Phil  or Rick that 
mentioned in the Friday team speak.

I just found a rather nice matlab package for the experimenters

http://www.mathworks.com/matlabcentral/fileexchange/15813-near-perfect-reconstruction-polyphase-filterbank

For those of us who do not have access to Matlab as its a hugely expensive 
piece of software. I personally use Octave which is open source and is 
nearly 100% compatible with matlab.

http://www.gnu.org/software/octave/


73s

Steve
G1YLB

--------------------------------------------------
From: "Ken N9VV" <n9vv at wowway.com>
Sent: Tuesday, July 06, 2010 8:58 PM
To: "Steven Doyle" <steve_doyle at o2.co.uk>
Subject: Re: 8 receivers

> Cheers Steve, well done. You are a *good* detective. I know that John 
> G0ORX/N6LYT <john.d.melton at googlemail.com> and Bruce Walker W1BW 
> <bruce at quidnet.com> will be *very* interested in anything that you find.
>
> They have been struggling with 4 simultaneous receivers and wanted to get 
> to 8. However they expressed frustration getting beyond 4 Rx.
>
> Perhaps your info can help them - and subsequently ALL OF US :-) :-)
> many thanks for delving into this IMPORTANT area,
> 73 de Ken N9VV
> http://24.192.100.58/rx0.html
> or
> http://24.192.100.58/rx1.html
>
>
> On 7/6/2010 2:44 PM, Steven Doyle wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> If we got it implemented in verilog on Mercury we would not be limited
>> to the 192K base band per receiver but could have different receivers
>> each with different base bands. So we could then have for example a
>> receiver for each of the amateur bands. Googling around I have
>> discovered some verilog implementations and even some IP cores are
>> already available.
>>
>> Ah too many interesting projects around !
>>
>> 73s
>>
>> Steve
>> G1YLB
>>
>> --------------------------------------------------
>> From: "Frank Brickle" <brickle at pobox.com>
>> Sent: Tuesday, July 06, 2010 6:52 PM
>> To: "Steve Doyle" <steve_doyle at o2.co.uk>
>> Subject: Re: [hpsdr] Polyphase filters
>>
>>> Polyphase filterbanks of this kind are at the heart of the new version
>>> of DttSP currently in development.
>>>
>>> 73
>>> Frank
>>> AB2KT
>>>
>>> On Tue, Jul 6, 2010 at 9:18 AM, Steve Doyle <steve_doyle at o2.co.uk> 
>>> wrote:
>>>> ***** High Performance Software Defined Radio Discussion List *****
>>>>
>>>> Hi,
>>>>
>>>> This weeks teamspeak peaked my interest when when someone mentioned
>>>> the potential of polyphase filters as the solution to multiple
>>>> receivers, I think someone mentioned 100 separate receivers !
>>>>
>>>> Anyway I came across the following tutorial, the math is beyond me
>>>> but the matlab program doesn't look to bad.
>>>>
>>>> Www.signumconcepts.com/download/paper035.pdf
>>>>
>>>> Interesting stuff
>>>>
>>>> 73s
>>>>
>>>> Steve
>>>> G1ylb
>>>>
>>>>
>>>> Sent from my iPhone
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