Re: [op25-dev] rs decoder in hdu.cc

On Sun, Jul 14, 2013 at 07:13:56PM -0400, Matt D wrote:

We are getting the data messages out of the HDU. So how is this so if we are not doing the error check? Is it not necessary for extracting the data information?

All of the error correcting block codes used in P25 are the sort where the codeword includes the encoded data verbatim; the code appends bits used for error correction, but a receiver can ignore those and just pull out the data bits. This greatly increases the likelihood of post-decoding bit errors, but it works fine when the SNR is good.