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[Discuss-gnuradio] Questions

From: Amr Youssef
Subject: [Discuss-gnuradio] Questions
Date: Sat, 5 May 2012 19:00:12 +0300

Hi , i have some questions : 

1- In  the following  .cc file  : ./gr-digital/lib/digital_crc32.cc  

Regarding CRC-32  , why the generated polynomial  is of length 36 Bits instead of 32 Bits (as expected) !  " it is written as : 
  // Automatically generated CRC function
 // polynomial: 0x104C11DB7
the above two lines exist in the code  . "  

 2- In the following .py file  : ./gr-digital/python/ofdm_packet_utils.py 

How  "random_mask_tuple"  is generated through the 15-bit Linear Feedback Shift Register (LFSR) .
Are they random ? if yes , why they are of length 8 bits (maximum number  255 ) instead of 15 bits ?!

Thanks in-advance  

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