Re: [Discuss-gnuradio] Gardner timing sync loop quetion

2014-06-04 Thread Tom Rondeau
On Tue, Jun 3, 2014 at 4:12 AM, Tiankun Hu wrote: > Hi all, > I am designing a 2 order Gardner timing sync loop(with 1 order PI loop > filter) for QAM64. > As Best's PLL book metioned, timing sync loop's parameter can be > calculated by using PLL theory. > Now I need calculate the PI loop filter'

[Discuss-gnuradio] Gardner timing sync loop quetion

2014-06-03 Thread Tiankun Hu
Hi all, I am designing a 2 order Gardner timing sync loop(with 1 order PI loop filter) for QAM64. As Best's PLL book metioned, timing sync loop's parameter can be calculated by using PLL theory. Now I need calculate the PI loop filter's factor K1(P gain) and K2(I gain). According PLL theory, we