Hi Anshul - Do you have a public repo for folks to use for debugging? Given that your system otherwise passes test and probably works, the best way to get feedback is via providing the source code. I really have no other suggestions; sorry! - MLD On Fri, Mar 30, 2018, at 1:49 PM, Anshul Thakur wrote: > I used a circular buffer of finite size to keep the past 'N' power > values of the sample stream in my block as a part of creating a > running sum. This buffer is initialized to 0 in the constructor.> The running > sum of powers is used to compute the average power used in > computing signal correlation.> > I have a capture stream (cfile) to test the operation of the block. > The test case uses a vector_source_c block to read the contents of the > file into memory. The unit tests pass without error.> > However, when I use the block in a flowgraph in that reads the same > file from a file source block gnuradio_companion, I am getting the > first few sample values as 0 which cause a divide by zero problem. > This messes up the rest of the running sum. I don't want to put an > 'if' block that checks for the zero condition as it is not expected > that a device/stream would ever spit out zero values.> > (a) Why am I getting the initial zero samples from the file block in > gnuradio_companion and non-zero values when using a vector_source > in unit tests?> > (b) What can I do about it (here specifically as a fix to the > situation, and a general guideline to always remember)?> > I am using GNURadio version 3.7.12.
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