|Subject:||Re: [Discuss-gnuradio] Doubt in digital modulation chain|
|Date:||Mon, 14 Jul 2014 09:06:15 -0400|
Dear All,I am expecting the data at the output of packed-to-unpacked block to be the same as the data at the output of differential decoder, except for some stray bits in the beginning. When I search for patterns in the transmit chain, in the receive chain, I don't get any match. This it the code(also attached) that I use to compare data in the transmit chain and the receive chain.
I am constructing the flow graph(screen capture, grc) attached.
template_len = 20
temp = scipy.fromfile(open("/tmp/diff-encode-out.bin"),
template = temp[100:template_len+100]
match = False
rec = scipy.fromfile(open("/tmp/rec-map-out.bin"), dtype=scipy.uint8, count=100000)
for i in range(9950):
if (template == rec[i:template_len+i]).all():
===========================The program works for BPSK, but fails to find pattern in QPSK, DQPSK etc.Would anyone know what is going wrong in my flow-graph?
Thank you in advance.--
Manu T S
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