Re: [Discuss-gnuradio] FSK using VCO

[Adeel Anwar]

One thing i forgot , there should be upsample(pulse shaping ) OR repeat by N block between "chunk2symbol" and "fm modulator"

On Thu, Feb 16, 2012 at 11:09 PM, Adeel Anwar <address@hidden> wrote:

Anju,

Try connecting these

data_src(0,1)==>chunk to symbol(-1,1)==>fm modulator(sensitivity=(2*pi*(freq_sep/2.0))/samp_rate))

    where freq_sep = symb_rate (for non-coherent detection)

On receiver side u can use quadrature demoulator


-Adeel

On Fri, Feb 17, 2012 at 12:42 AM, anju babu <address@hidden> wrote:

HI all,
  
          I'm developing an underwater modem which uses acoustic signal for transmission and reception .for that i need to have a FSK modulator.since CPFSk is not practically possible in underwater ,i decided to use VCO.I have to modulate data from a file sourc(output type byte) using 10khz carrier.i don't know how to do this.when i connected a file source -uchar to float- vco -scopesink and observed output i couldn't see what i was expecting.can't i input the vco with a file source?please help me.

thanks in advance
ANJU
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