On Tue, Apr 15, 2008 at 3:48 PM, Wireless Monster <[EMAIL PROTECTED]> wrote: > ...I understand... > so... What needs to be done to assure data will be treated as a 270.833Ks/s > rate?
I feel like we're in an Abbott and Costello routine. Data is nothing until it's pumped out of a DAC at a specific rate. Lets say it's 64Msps is the exact rate we're going to be feeding some DACs. We know there is an interpolating CIC filter beforehand. We figure we'll do a power of 2 to ensure there is no extra gain added to the signal - so we choose 64. Knowing this information, the stream at the output of the interpolating CIC filter is 64Msps, and the stream going in is 64/64Msps, or 1Msps - then we know we should generate a stream of data that is in fact a 1Msps representation of whatever data we wish. In your case, you wish to make a 270.8333kSps (the S here means Symbols ... also known as a baud) stream into a 1Msps sample stream. With some quick math, I can determine that you need to interpolate by the exact value of 48/13. This has your data (270.8333kSymbols/sec) at a sample rate of 1Msample/sec. The lesson here is to never mix the terminology of sample and symbol (or baud) rate. Is it more clear as to what you're doing now? Brian _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
