RE: [Discuss-gnuradio] gmsk error

[Robitaille, Michael]

I am in the process of implementing the whitener and will most likely do
CRC16.  For integrity check, I originally implemented of you a parity bit
(yes it's limited to detecting on one bit error but my data load was small -
two byte).

Thanks,
Mike

-----Original Message-----
From: Robert McGwier [mailto:address@hidden 
Sent: Thursday, December 01, 2005 8:30 PM
To: address@hidden
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] gmsk error

We put the whitener and CRC32 in for a reason:

1) clock recovery and other things work better if you do not have long 
runs of 1's or 0's.

2) How will you be able to check end to end integrity without CRC or 
other style checking?

The answer is,  you can live without either but you pay the obvious 
penalties implied by 1 and 2 above.

Bob



address@hidden wrote:

>Urgg, should have been under this subject
>
>Original Message:
>-----------------
>From: address@hidden address@hidden
>Date: Thu, 1 Dec 2005 13:53:15 -0500
>To: address@hidden
>Subject: [Discuss-gnuradio] (no subject)
>
>
>On Wed, 30 Nov 2005 15:00:34 -0800, Eric Blossom wrote:
>  
>
>>The calling sequence for the gaussian filter design changed.
>>Even if ggmsk-test were fixed to use it, it doesn't work anywhere
>>nearly as good as the new code.
>>    
>>
>
>I would like to use the new code in gmsk2 but I can't implement the CRC32
>and the whiten/dewhiten in the microprocessor used in the transmitter.  The
>original engineer on this project, who left the company and that I am
>replacing, selected a real poor microprocessor.
>
>Do you think that I can use the same basic idea of the gmsk2 framer and
>sync whithout the use of the CRC32 and whiten?
>
>Mike
>
>--------------------------------------------------------------------
>mail2web - Check your email from the web at
>http://mail2web.com/ .
>
>
>
>
>_______________________________________________
>Discuss-gnuradio mailing list
>address@hidden
>http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>--------------------------------------------------------------------
>mail2web - Check your email from the web at
>http://mail2web.com/ .
>
>
>
>
>_______________________________________________
>Discuss-gnuradio mailing list
>address@hidden
>http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>  
>


-- 
Laziness is the number one inspiration for ingenuity.  Guilty as charged!