Hi All It is known from the books that NLMS is better than LMS when the dynamic range of the input signal to the equalizer is large. But if we use an AGC before the equalizer and then use LMS to adapt the taps, what would be the performance compared to NLMS? Best Regards Chintan
A que on LMS vs NLSM
Started by ●October 26, 2010
Reply by ●October 26, 20102010-10-26
cpshah99 wrote:> Hi AllHi stupid studiot.> It is known from the books that NLMS is better than LMS when the dynamic > range of the input signal to the equalizer is large.NLMS makes the convergence rate independent from the energy of the reference signal.> But if we use an AGC before the equalizer and then use LMS to adapt the > taps, what would be the performance compared to NLMS?NLMS *is* the AGC applied to the reference input of the equalizer adaptation algorithm. If you apply the AGC to the signal input, you will screw up the adaptation. Vladimir Vassilevsky DSP and Mixed Signal Design Consultant http://www.abvolt.com
Reply by ●October 26, 20102010-10-26
> > >cpshah99 wrote: >> Hi All > >Hi stupid studiot. > >> It is known from the books that NLMS is better than LMS when thedynamic>> range of the input signal to the equalizer is large. > >NLMS makes the convergence rate independent from the energy of the >reference signal. > >> But if we use an AGC before the equalizer and then use LMS to adapt the >> taps, what would be the performance compared to NLMS? > >NLMS *is* the AGC applied to the reference input of the equalizer >adaptation algorithm. If you apply the AGC to the signal input, you will >screw up the adaptation. > > >Vladimir Vassilevsky >DSP and Mixed Signal Design Consultant >http://www.abvolt.com >%%% Hey Vlad Many thanks for your ans. Regards Chintan