The disturbances such as: ICI(Inter Carrier Interference), OOBE(Out of Band Emission), etc. in GFDM(Generalized Frequency Division Multiplex) multicarrier modulation communication system may degrade system performance, and timefrequency dualselective fading will worsen this issue. A channel estimation algorithm is introduced to lower the system’s interferences and computational complexity, by optimizing the prototype filter parameters according to disturb signal energy. Precode and equilibrium are also chosen to suppress ICI, OOBE, and interference from other users or antennas. A simulation model by Matlab is set up, BER curves and constellation diagrams have been worked out to evaluate the system performances. The simulation result indicates that GFDM with those corrective actions may get a lower BER level.
WU Hong,LIU Bing,ZHAO Yingxin,WANG Chong,ZHANG Yuting TANG Ran,MA Xiaoxu,XU Xiyan,MU Weiwei,LIU Zhiyang
. Research on Interference Suppression in
Generalized Frequency Division Multiplex System[J]. Journal of Shanghai Jiaotong University, 2017
, 51(9)
: 1117
-1123
.
DOI: 10.16183/j.cnki.jsjtu.2017.09.015
［1］MICHAILOW N, MATTHE M, GASPAR I S, et al. Generalized frequency division multiplexing for 5th generation cellular networks［J］. IEEE Transactions on Communications, 2014, 62(9): 30453061.
［2］FANG J, LU I T. Precoder designs for jointly suppressing outofband emission and peaktoaverage power ratio in an orthogonal frequency division multiplexing system［J］. LET Communications, 2014, 8(10): 17051713.
［3］TOM A, SAHIN A, ARSLAN H. Mask compliant precoder for OFDM spectrum shaping［J］. IEEE Communications Letters, 2013, 17(3): 447450.
［4］MOHAMAD M, NILSSON R, BEEK J V D. An analysis of outofband emission and inband interference for precoded and classical OFDM systems［C］∥European Wireless 2015: European Wireless Conference. Budapest: VDE, 2015: 15.
［5］CHANG L, LI J, LI G Y. Blind parameter estimation of GFDM signals over frequencyselective fading channels［C］∥IEEE Global Conference on Signal and Information Processing. Orlando: IEEE, 2015: 275279.
［6］FARHANG A, MARCHETTI N, DOYLE L E. Low complexity GFDM receiver design: A new approach［C］∥IEEE International Conference on Communications. London: IEEE, 2015: 47754780.
［7］LIU Y, MEI W, DU H. Two compressive sensingbased estimation schemes designed for rapidly timevarying channels in orthogonal frequency division multiplexing systems［J］. LET Signal Processing, 2014, 8(3): 291299.
［8］MORETTI M, SANGUINETTI L, WANG X. Resource allocation for power minimization in the downlink of THPbased spatial multiplexing MIMOOFDMA systems［J］. IEEE Transactions on Vehicular Technology, 2014, 64(1): 405411.
［9］GUVENKAYA E, TOM A, ARSLAN H. Joint sidelobe suppression and PAPR reduction in OFDM using partial transmit sequences［C］∥Military Communications Conference, Milcom 2013. San Diego: IEEE, 2013: 95100.
［10］SHARIFIAN Z, OMIDI M J, SAEEDISOURCK H, et al. Linear precoding for PAPR reduction of GFDMA［J］. IEEE Wireless Communications Letters, 2016, 5(5): 520523.
［11］RUGINI L, BANELLI P, LEUS G. Simple equalization of timevarying channels for OFDM［J］. IEEE Communications Letters, 2005, 9(7): 619621.
［12］BOUSSAKTA S, HOLT A G J. Fast algorithm for calculation of both WalshHadamard and fourier transforms (FWFTs)［J］. Electronics Letters, 1989, 25(20): 13521354.
［13］ZHANG D, MENDES L L, MATTH M, et al. Expectation propagation for nearoptimum detection of MIMOGFDM signals［J］. IEEE Transactions on Wireless Communications, 2016, 15(2): 10451062.
