TY - JOUR
T1 - BICM decoding of jammed OFDM transmissions using the em algorithm
AU - Sanguinetti, Luca
AU - Morelli, Michele
AU - Poor, H. Vincent
N1 - Funding Information:
Manuscript received August 11, 2010; revised March 7, 2011; accepted June 13, 2011. The associate editor coordinating the review of this paper and approving it for publication was H. Nguyen. L. Sanguinetti and M. Morelli are with the University of Pisa, Department of Information Engineering, Via Caruso 56126 Pisa, Italy (e-mail: {luca.sanguinetti, michele.morelli}@iet.unipi.it). H. V. Poor is with the Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA (e-mail: [email protected]). This research was supported in part by the U.S. National Science Foundation under Grant CNS-09-05398. Digital Object Identifier 10.1109/TWC.2011.062911.101448
PY - 2011/9
Y1 - 2011/9
N2 - Wireless communications over unlicensed frequency bands are expected to suffer from significant co-channel interference, which inevitably limits the error-rate performance. In this letter, an orthogonal frequency-division multiplexing system employing bit-interleaved coded-modulation is considered and the problem of reliable decoding in the presence of unknown narrowband interference (NBI) is addressed. The proposed solution operates in an iterative fashion according to the expectation-maximization algorithm and is derived by modeling the interference power on each subcarrier as a random variable with an inverse gamma distribution. Computer simulations indicate that the resulting scheme is effective against NBI and, compared to existing alternatives, it achieves a better trade-off in terms of error rate performance, computational complexity and system overhead.
AB - Wireless communications over unlicensed frequency bands are expected to suffer from significant co-channel interference, which inevitably limits the error-rate performance. In this letter, an orthogonal frequency-division multiplexing system employing bit-interleaved coded-modulation is considered and the problem of reliable decoding in the presence of unknown narrowband interference (NBI) is addressed. The proposed solution operates in an iterative fashion according to the expectation-maximization algorithm and is derived by modeling the interference power on each subcarrier as a random variable with an inverse gamma distribution. Computer simulations indicate that the resulting scheme is effective against NBI and, compared to existing alternatives, it achieves a better trade-off in terms of error rate performance, computational complexity and system overhead.
KW - OFDM
KW - bit-interleaved coded-modulation
KW - expectation-maximization algorithm
KW - narrowband interference
UR - http://www.scopus.com/inward/record.url?scp=80052945793&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80052945793&partnerID=8YFLogxK
U2 - 10.1109/TWC.2011.062911.101448
DO - 10.1109/TWC.2011.062911.101448
M3 - Article
AN - SCOPUS:80052945793
SN - 1536-1276
VL - 10
SP - 2800
EP - 2806
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 9
M1 - 5951704
ER -