On Wed, 19 Sep 2007 06:44:20 -0700, [email protected]
wrote:

>Hi,
>
>
>I would like to knwow if the QPSK Gardner algorithm for symbol
>recovery works too for QAM or MPSK signals ?
>
>Thanks

As number of levels increase the self-noise of the ted becomes worse.
Gardner is mainly useful for a binary signal but can be used for lower
M levels with not too low SNR.