In this paper,a novel Filter bank multicarrier/quadrature amplitude modulation(FBMC/QAM)scheme which separates the real and imaginary part of the subcarriers in a multipath time-varying fading channel is put forward a...In this paper,a novel Filter bank multicarrier/quadrature amplitude modulation(FBMC/QAM)scheme which separates the real and imaginary part of the subcarriers in a multipath time-varying fading channel is put forward and analyzed in detail.By applying the methods of mapping the time-domain symbols and reducing the correlation of frequency-domain symbols,the presented scheme can eliminate the intrinsic imaginary interference more thoroughly and greatly mitigate residual interference as well as receive a good peak-to-average power ratio(PAPR)mitigation effect.Theoretical analysis and simulation results indicate that compared with the existing schemes with the methods of pre-coding(FBMC/QAM-CC)and iterative interference cancellation(FBMC/QAM-IIC),our adopted scheme can not only obtain better performances on bit error rate(BER)and out-of-band(OOB)emission with no loss of transmission efficiency,but also achieve a good PAPR mitigation effect with a small increase in complexity.展开更多
In this paper,we address the Alamouti code in Filter-Bank Multicarrier with Offset Quadrature Amplitude Modulation(FBMC/OQAM)and propose a novel block-wise Alamouti code,in which a repeated block is designed to elimin...In this paper,we address the Alamouti code in Filter-Bank Multicarrier with Offset Quadrature Amplitude Modulation(FBMC/OQAM)and propose a novel block-wise Alamouti code,in which a repeated block is designed to eliminate the imaginary interference among FBMC/OQAM symbols.The proposed approach exhibits a higher spectral efficiency than the conventional block-wise Alamouti scheme,as only one column of zero symbols is used as a guard interval instead of two.Furthermore,compared to the conventional scheme,the bit error ratio is improved in the proposed block-wise Alamouti,as the assumption on channel invariance at two adjacent sub-carriers is not required.Simulation results indicate that,with a significantly reduced overhead,the proposed Alamouti scheme achieves better performance over the conventional block-wise Alamouti scheme.展开更多
In orthogonal frequency division multiplexing （OFDM）/offset quadrature amplitude modulation （OQAM） systems, the relationship between the input of the synthesis filter bank （SFB） and the output of the analysis fi...In orthogonal frequency division multiplexing （OFDM）/offset quadrature amplitude modulation （OQAM） systems, the relationship between the input of the synthesis filter bank （SFB） and the output of the analysis filter bank （AFB） is much more complicated than OFDM due to its special prototype filter. By analyzing the trans- muhiplexer response characteristics, an equivalent trans-multiplexer matrix is proposed to describe the relationship between the input and the output. With the equivalent matrix, the output can be easily computed using matrix multiplication with the input. Moreover, with the inverse of the equivalent trans-muhiplexer matrix, imaginary interference can be eliminated using the precoding method. The simulation results show the correctness of the equivalent trans-multiplexer matrix.展开更多
基金supported by the National Natural Science Foundation of China(No.61601296 and No.61701295)the Talent Program of Shanghai University of Engineering Science(No.2018RC43).
文摘In this paper,a novel Filter bank multicarrier/quadrature amplitude modulation(FBMC/QAM)scheme which separates the real and imaginary part of the subcarriers in a multipath time-varying fading channel is put forward and analyzed in detail.By applying the methods of mapping the time-domain symbols and reducing the correlation of frequency-domain symbols,the presented scheme can eliminate the intrinsic imaginary interference more thoroughly and greatly mitigate residual interference as well as receive a good peak-to-average power ratio(PAPR)mitigation effect.Theoretical analysis and simulation results indicate that compared with the existing schemes with the methods of pre-coding(FBMC/QAM-CC)and iterative interference cancellation(FBMC/QAM-IIC),our adopted scheme can not only obtain better performances on bit error rate(BER)and out-of-band(OOB)emission with no loss of transmission efficiency,but also achieve a good PAPR mitigation effect with a small increase in complexity.
基金supported in part by the National Natural Science Foundation of China with Grant numbers 62001333,61729101,61831013 and 11804256.
文摘In this paper,we address the Alamouti code in Filter-Bank Multicarrier with Offset Quadrature Amplitude Modulation(FBMC/OQAM)and propose a novel block-wise Alamouti code,in which a repeated block is designed to eliminate the imaginary interference among FBMC/OQAM symbols.The proposed approach exhibits a higher spectral efficiency than the conventional block-wise Alamouti scheme,as only one column of zero symbols is used as a guard interval instead of two.Furthermore,compared to the conventional scheme,the bit error ratio is improved in the proposed block-wise Alamouti,as the assumption on channel invariance at two adjacent sub-carriers is not required.Simulation results indicate that,with a significantly reduced overhead,the proposed Alamouti scheme achieves better performance over the conventional block-wise Alamouti scheme.
基金supported by Hubei Provincial Natural Science Foundation of China (2017CFB591)
文摘In orthogonal frequency division multiplexing （OFDM）/offset quadrature amplitude modulation （OQAM） systems, the relationship between the input of the synthesis filter bank （SFB） and the output of the analysis filter bank （AFB） is much more complicated than OFDM due to its special prototype filter. By analyzing the trans- muhiplexer response characteristics, an equivalent trans-multiplexer matrix is proposed to describe the relationship between the input and the output. With the equivalent matrix, the output can be easily computed using matrix multiplication with the input. Moreover, with the inverse of the equivalent trans-muhiplexer matrix, imaginary interference can be eliminated using the precoding method. The simulation results show the correctness of the equivalent trans-multiplexer matrix.
