DocumentCode :
1374899
Title :
Suppression of multiple narrowband interferers in a spread-spectrum communication system
Author :
Carlemalm, Catharina ; Poor, H. Vincent ; Logothetis, Andrew
Author_Institution :
Div. of Signals & Syst., Uppsala Univ., Sweden
Volume :
18
Issue :
8
fYear :
2000
Firstpage :
1365
Lastpage :
1374
Abstract :
We consider the problem of estimating and suppressing many unknown independent and time-varying interferers in a spread-spectrum communication system. The interferers 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 interference. 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.
Keywords :
adaptive estimation; adaptive filters; adaptive signal processing; channel bank filters; computational complexity; filtering theory; frequency-domain analysis; hidden Markov models; interference suppression; radiofrequency interference; signal detection; spread spectrum communication; tracking; HMM filter bank; adaptive estimation; adaptive filtering; frequency domain; hidden Markov model filter bank; independent interferers; interference detection; interference estimation; interference suppression; interference tracking; linear computational complexity; multiple narrowband interferers; simulation studies; spread-spectrum communication system; time-varying interferers; wide frequency range; Computational complexity; Computational modeling; Filters; Frequency domain analysis; Frequency estimation; Hidden Markov models; Interference suppression; Narrowband; Spread spectrum communication; Time varying systems;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/49.864002
Filename :
864002
Link To Document :
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