DocumentCode :
1877178
Title :
Flexible adjacent channel interference and phase noise suppression in energy-efficient OFDMA receivers
Author :
Syrjala, Ville ; Valkama, Mikko
Author_Institution :
Dept. of Commun. Eng., Tampere Univ. of Technol., Tampere, Finland
fYear :
2012
fDate :
17-19 Sept. 2012
Firstpage :
221
Lastpage :
225
Abstract :
This paper addresses the problem of phase noise mitigation in OFDMA-based radio link in a case where also adjacent channels are downconverted and therefore affected by the phase noise. The paper proposes the use of receiver-side digital-signal-processing algorithm for mitigation of receiver phase-noise in case of adjacent channel interference. The idea of the algorithm is to first detect the received signal, and then to construct an estimate of the phase-noise-free signal from the detected symbols and channel estimates. The phase noise is then estimated by comparing the received signal with phase noise to the phase-noise-free estimate. The algorithm can be used iteratively. Simulations are then done to show that the algorithm indeed is able to efficiently mitigate the phase noise effects even when adjacent channels are present. This algorithm allows moving the complexity from the analogue side to the digital side of the receiver and thus potentially results in very energy efficient receiver design.
Keywords :
OFDM modulation; adjacent channel interference; channel estimation; frequency division multiple access; interference suppression; phase noise; radio links; radio receivers; OFDMA based radio link; adjacent channel downconvertion; channel estimation; energy efficient OFDMA receivers; flexible adjacent channel interference; phase noise estimation; phase noise mitigation; phase noise suppression; phase noise-free signal; Algorithm design and analysis; Bandwidth; OFDM; Phase noise; Receivers; Signal to noise ratio; FRO oscillator; OFDMA; PLL Oscillator; digital signal processing; dirty-RF; mitigation; phase noise;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), 2012 IEEE 17th International Workshop on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4673-3123-4
Electronic_ISBN :
978-1-4673-3124-1
Type :
conf
DOI :
10.1109/CAMAD.2012.6335338
Filename :
6335338
Link To Document :
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