Hi All! It's clear how to build system when some real signal (1st real sequence) goes to input of Gilbert transform giving us the second (imag) sequences of samples. http://www.dsprelated.com/blogimages/RickLyons/SSB-Lyons.pdf The quiestion is - how to use Hilbert transform in QAM modulator, because modulator block gives us complex signal and then RRC filter processs the signal. Thanks!!! _____________________________ Posted through www.DSPRelated.com
Single Sideband modulation using QAM64
Started by ●November 26, 2014
Reply by ●November 26, 20142014-11-26
On Wed, 26 Nov 2014 09:49:31 -0600, ipruzhinin wrote:> Hi All! > > It's clear how to build system when some real signal (1st real sequence) > goes to input of Gilbert transform giving us the second (imag) sequences > of samples. > > http://www.dsprelated.com/blogimages/RickLyons/SSB-Lyons.pdf > > The quiestion is - how to use Hilbert transform in QAM modulator, > because modulator block gives us complex signal and then RRC filter > processs the signal.SSB modulation isn't appropriate for QAM. If it's already in quadrature there's no duplication of the spectrum in baseband, which means that there isn't a single sideband to tease out of the baseband signal. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Reply by ●November 26, 20142014-11-26