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Re: [Discuss-gnuradio] Receiver : acoustic modem
From: |
Alexandru Csete |
Subject: |
Re: [Discuss-gnuradio] Receiver : acoustic modem |
Date: |
Fri, 16 Jul 2010 01:37:50 +0200 |
On 16 July 2010 00:51, Raman O <address@hidden> wrote:
>
> hello ,
>
> I have implemented receiver for detecting and decoding data frame based
> FHSS. At the moment, I am feeding Rx with recorded wav file and it works fine.
> The problem is when i want to do online decoding by replacing wav source with
> alsa source, I see nothing happening beyond frame sync.
>
> if anyone has implemented modem based on acoustic , please guide me.
Could it be that your wav file has integer samples with range 0..32768
(or signed)? The samples from the audio input are float between -1.0
and +1.0
Alex