On 03/21/2013 03:45 PM, Manu T S wrote:
I'm trying to make a block for fading channel model using hierarchical
block.
class channel(gr.hier_block2):
def __init__(self):
gr.hier_block2.__init__(self, "channel",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(1, 1, gr.sizeof_gr_complex))
self.taps = generate_taps()
self.filt = filter.fir_filter_ccc(1, self.taps)
self.connect(self, self.filt, self)
def generate_taps():
n_taps = random.randint(1, 10)
r_taps = random.rand(n_taps)
i_taps = random.rand(n_taps)
return r_taps + 1j*i_taps
I want the block to be able to update the channel filter taps in run
time. Can I do that?
Can I define a function in the class so that the filter taps are
updated for every 5 seconds?
The set_taps function gives you access to this from the top_block level.
In that case, your main thread would be updating the block's taps using
a while loop with sleep(5). You could also make a block class that
inherits from fir_filter_ccc or channel_model and change the taps within
the work function every N seconds: every time (ninput_items / samp_rate)
% N == 0. I hope that's enough info to point you in the right direction.
Thank you.
--
Manu T S
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*Sean M. Nowlan*
Research Engineer I
ICL/CNSD
Georgia Tech Research Institute
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