Highest rate achievable by current DSP and A/D chips? I'm trying to determine whether an application I have in mind is feasible with currently available DSP technology (DSP chips and ADCs).

I want to eliminate an interfering signal using an LMS adaptive filter.  I have access to the source of the interference.

The bandwidth of the interfering signal is in the order of 1MHz  (maybe a little less, but just as a conservative assumption, let's say 1MHz).  The bandwidth of the signal I want to measure can be higher; possibly in the order of 10MHz or 20MHz.

EDIT: I estimate that the application will require sampling at no less than 12-bit resolution.

Does the above sound feasible?  Could you suggest some DSP chips that you'd estimate could potentially handle the above workload? 

If it sounds like it's not feasible, can you give an estimate of what you think would be the highest bandwidth that current DSP chips could handle?

You may assume that the DSP chip will be doing exclusively this;  or maybe just some "lightweight" additional work.

Thanks!
This is a pretty benign requirement. The Open Source software defined radio community does significantly more than 100 MS/s complex samples in software running on stock PC hardware. The samples come from stock SDR hardware.

However, you wouldn't be doing a 100s of taps long channel estimator / LMS filter at that rate.

It's impossible to estimate the computational complexity of your problem without at least knowing what kind of interferer you want to cancel. However, 10 MS/s really doesn't sound dramatic at all.