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List:       gnuradio-discuss
Subject:    Re: [Discuss-gnuradio] in-band signaling & dependent packets (i.e.,
From:       George Nychis <gnychis () cmu ! edu>
Date:       2008-01-12 18:01:56
Message-ID: 47890094.5090409 () cmu ! edu
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Thanks Brian,

> A matched filter is just a FIR filter that does correlation because
> the coefficients are a specific sequence instead of a frequency
> response.  This is how CDMA works.  You "spread" your one bit out over
> this PN sequence and then use a matched filter to correlate against
> the expected PN sequence.  You can either get a 1 or a -1 depending if
> you sent a 0 or a 1.

Would any of the FIR filters that already exist in GR be appropriate?  I 
  could then perform the cross-correlation on the output of the block.

- George



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