Suppression of Multiple Narrowband Interferers in a
Spread-spectrum Communication System
IEEE Journal on on Selected Areas in Communications,
Special Issue on Broadband Communications,
vol. 18, August 2000. © 2000 IEEE
We consider the problem of estimating and suppressing many
unknown independent and time-varying interferers in a
spread-spectrum communication system.
are assumed to be present in a wide frequency range.
In order to detect, estimate and track the
interference, we use a bank of hidden Markov model filters
operating in the frequency domain. The hidden Markov model
filters' outputs are then used to suppress the existing
The computational complexity of our scheme
is only linear in the number of interferers. The simulation
studies show that our proposed novel schemes adapt quickly
in tracking the time-varying nature of the interference.
Channel estimation in
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