Order Tray | Contact Us | Home | SIG Lists

[dsp] AFSK demodulator code for ARM7TDMI?

John B. Stephensen kd6ozh at verizon.net
Sat Feb 12 01:29:34 UTC 2005


The shape of the low pass filter response is important because you want to
minimize bandwidth requirements but filtering also smears the data and
causes intersymbol interference.

73,

John
KD6OZH

----- Original Message -----
From: <scott at opentrac.org>
To: "'TAPR DSP Mailing List'" <dsp at lists.tapr.org>
Sent: Saturday, February 12, 2005 01:20 UTC
Subject: RE: [dsp] AFSK demodulator code for ARM7TDMI?


> Ahhh.. I'll take your word for it.  =]  That bit almost makes sense to
me...
> guess it's time to pick up a basic DSP book along with the ARM manual.
And
> here I thought calculus was a stupid requirement for computer science...
>
> Scott
> N1VG
>
> -----Original Message-----
> From: dsp-bounces at lists.tapr.org [mailto:dsp-bounces at lists.tapr.org]On
> Behalf Of John B. Stephensen
> Sent: Friday, February 11, 2005 5:13 PM
> To: TAPR DSP Mailing List
> Subject: Re: [dsp] AFSK demodulator code for ARM7TDMI?
>
>
> Low pass filtering is required but it shoud match whatever is in the modem
> spec. Usually, the transmitter and receiver have root raised cosine
filters
> for an overall raised cosine response, but it depends on when it was
> designed.
>
> 73,
>
> John
> KD6OZH
>
>
> _______________________________________________
> dsp mailing list
> dsp at lists.tapr.org
> https://lists.tapr.org/cgi-bin/mailman/listinfo/dsp
>






More information about the dsp mailing list