DocumentCode :
643518
Title :
Impulse noise mitigation for MIMO-OFDM wireless networks with linear equalization
Author :
Darsena, Donatella ; Gelli, Giacinto ; Melito, Fulvio ; Verde, Francesco ; Vitiello, Autilia
Author_Institution :
Dipt. di Ing., Univ. Parthenope di Napoli, Naples, Italy
fYear :
2013
fDate :
7-8 Oct. 2013
Firstpage :
94
Lastpage :
99
Abstract :
This paper considers a multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) wireless network contaminated by Middleton Class A impulsive noise, which is one of the major sources of performance degradation in many wireless systems, including sensor networks. In this scenario, the conventional linear zero-forcing (ZF) equalizer does not perform satisfactorily, since the diversity order does not monotonically increase with the signal-to-noise ratio (SNR). In order to overcome such a problem, we synthesize an improved linear ZF equalizer, which mitigates, in the minimum mean output-energy (MMOE) sense, the impulse noise contribution at the equalizer output. Specifically, the proposed equalizer exploits the fact that the noise samples can be spatially correlated in compact multi-antenna receivers, i.e., when the antenna elements cannot be sufficiently spaced apart due to size constraints. Numerical simulations are performed, aimed at comparing the performances of the proposed ZF-MMOE equalizer with those of competing approaches.
Keywords :
MIMO communication; OFDM modulation; equalisers; impulse noise; wireless sensor networks; MIMO-OFDM wireless networks; MMOE sense; Middleton class A impulsive noise; SNR; ZF-MMOE equalizer; antenna elements; compact multiantenna receivers; conventional linear zero-forcing equalizer; impulse noise mitigation; linear ZF equalizer; linear equalization; mean output-energy sense; multiple-input multiple-output orthogonal frequency-division multiplexing wireless network; numerical simulations; sensor networks; signal-to-noise ratio; size constraints; Correlation; Equalizers; MIMO; OFDM; Receivers; Signal to noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Measurements and Networking Proceedings (M&N), 2013 IEEE International Workshop on
Conference_Location :
Naples
Print_ISBN :
978-1-4673-2873-9
Type :
conf
DOI :
10.1109/IWMN.2013.6663784
Filename :
6663784
Link To Document :
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