I am using convolutional interleaver for DVB-T. DVB-T uses shortened (204, 188) Reed Solomon code. The output is sent to a convolutional interleaver with depth 12 and slope 17. I tested it in Matlab and am using the function 'convintrlv'. After the convolutional interleaver, the interleaved symbols contain many zero symbols because of the delay registers. my question is, are we gonna send those zero symbols? if so, aren't they some overhead that we can avoid? thanks.

# question on convolutional interleaver

Started by ●August 3, 2006

Reply by ●August 3, 20062006-08-03

Furthermore, what decides the slope? It seems to be 17*12=204. Is this a coincidence? If not, why shall we choose depth to be 17? can we choose 2 or 3 and still have the same performance? I am asking this because I think interleaver depth (12) should determines the final performance, not the slope. thanks. philgo wrote:> I am using convolutional interleaver for DVB-T. > > DVB-T uses shortened (204, 188) Reed Solomon code. The output is sent > to a convolutional interleaver with depth 12 and slope 17. I tested it > in Matlab and am using the function 'convintrlv'. > After the convolutional interleaver, the interleaved symbols contain > many zero symbols because of the delay registers. > > my question is, are we gonna send those zero symbols? if so, aren't > they some overhead that we can avoid? > > thanks.