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Re: [Discuss-gnuradio] Generating orthogonal PN sequences in GRC
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From: |
Achilleas Anastasopoulos |
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Subject: |
Re: [Discuss-gnuradio] Generating orthogonal PN sequences in GRC |
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Date: |
Fri, 14 Oct 2011 14:01:55 -0400 |
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User-agent: |
Mozilla/5.0 (Windows NT 6.0; WOW64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 |
A PN sequence can be generated by a Finite State Machine (FSM).
You can use the block gr_trellis_encoder and feed it with 0's at the
input in order to generate the PN sequence.
The only think you need to provide to it is a description of the FSM
(at this point we do not have a constructor that takes directly the
feedback polynomial and constructs the next state and output tables).
See the trellis documentation for details...
Achilleas
PS: now i see that we can generalize the trellis_encoder block to be
used also as a block with 0 inputs, ie, emulating an all-0 input sequence...