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[Discuss-gnuradio] Error in creating a block

From: Vishwanatha H G
Subject: [Discuss-gnuradio] Error in creating a block
Date: Tue, 7 Apr 2015 16:36:38 +0530

Hi all,
 I crated a block named costas_loop_cc. it works fine for 2psk, 4psk,4qam and 8psk. But it does not support to 16QAM i.e order 16. when I execute with order 16 it shows the error like this:
Generating: "/home/lekha/Downloads/mpsk_stage6.py"

Generating: "/home/lekha/Downloads/mpsk_stage6.py"

Executing: "/home/lekha/Downloads/mpsk_stage6.py"

Using Volk machine: sse4_1_32
Traceback (most recent call last):
  File "/home/lekha/Downloads/mpsk_stage6.py", line 443, in <module>
    tb = mpsk_stage6()
  File "/home/lekha/Downloads/mpsk_stage6.py", line 285, in __init__
    self.costas_loop_cc_0 = digital.costas_loop_cc(.1, 16)
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/digital/digital_swig.py", line 1104, in make
    return _digital_swig.costas_loop_cc_make(*args, **kwargs)
RuntimeError: order must be 2, 4, or 8

I used QAM_constellation.py code for constellation ploting of 16 QAM . Why it does not support for order 16? how should I make it work? any alternative for 16QAM demod?

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