Re: Range Reduccion caused by high-frequency modulated signa
Another ranging method is to use a pseudorandom digital transmission. At the receiver you can get the correlation peak located to within 0.1 bit time or better.
I know about the correlation peak technique. However, for this technique you need to sample a large amount of data in order to decrease the variation in the final estimation. The method I would like to try can achieve a resolution within 1/148 bit time using no more of 10 bits.
The idea is to use a slot time very short with extra data that the normal receiver circuit will filter out, so the digital data is not corrupted. However, in parallel a analog circuit will be trigger to sample this few bit.
Thanks for the range information. Now, I will study if I can amplify the RF signal only for the ranging information and still pass the RF regulation of European Union.