MIMO單載波分?jǐn)?shù)階傅里葉域均衡系統(tǒng)及最優(yōu)階次選擇方法
發(fā)布時(shí)間：2019-04-13 17:43
【摘要】：單載波頻域均衡(SC-FDE)技術(shù)可以有效地克服無(wú)線傳輸中的多徑衰落,而多輸入多輸出(MIMO)能大大提高頻譜利用率.兩者的結(jié)合已成為下一代無(wú)線通信系統(tǒng)上行鏈路的傳輸方案.然而,當(dāng)無(wú)線信道是快速時(shí)變時(shí),MIMO SC-FDE系統(tǒng)的頻域信道矩陣將為非對(duì)角矩陣,形成嚴(yán)重的頻域子信道間干擾,使系統(tǒng)性能急劇下降.針對(duì)這一問(wèn)題,本文采用在分?jǐn)?shù)階傅里葉域均衡代替?zhèn)鹘y(tǒng)頻域均衡,提出MIMO單載波分?jǐn)?shù)階傅里葉域均衡(MIMO SC-FrFDE)系統(tǒng).通過(guò)選擇合適的分?jǐn)?shù)階傅里葉變換階次,實(shí)現(xiàn)分?jǐn)?shù)階傅里葉域信道矩陣的近似對(duì)角化.仿真結(jié)果表明,在快速時(shí)變信道下,本文提出的MIMO SC-Fr FDE系統(tǒng)比傳統(tǒng)MIMO SC-FDE具有更好的誤碼率性能.
[Abstract]:Single carrier frequency domain equalization (SC-FDE) technique can effectively overcome multipath fading in wireless transmission, while multi-input multiple-output (MIMO) can greatly improve spectrum efficiency. The combination of the two has become the uplink transmission scheme of the next generation wireless communication system. However, when the wireless channel is fast time-varying, the frequency-domain channel matrix of the MIMO SC-FDE system will be non-diagonal matrix, resulting in a serious inter-channel interference between the frequency-domain subchannels, resulting in a sharp degradation of the system performance. In order to solve this problem, the fractional Fourier domain equalization (MIMO SC-FrFDE) system of MIMO single carrier is proposed in this paper, which replaces the traditional frequency domain equalization in fractional Fourier domain equalization. The approximate diagonalization of the fractional Fourier domain channel matrix is realized by selecting the appropriate fractional Fourier transform order. The simulation results show that the proposed MIMO SC-Fr FDE system has better bit error rate (BER) performance than the traditional MIMO SC-FDE system in fast time-varying channels.
【作者單位】： 鄭州大學(xué)信息工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(No.61201251,No.61172086,No.61210005,No.61331021)
【分類號(hào)】：TN919.3
[Abstract]:Single carrier frequency domain equalization (SC-FDE) technique can effectively overcome multipath fading in wireless transmission, while multi-input multiple-output (MIMO) can greatly improve spectrum efficiency. The combination of the two has become the uplink transmission scheme of the next generation wireless communication system. However, when the wireless channel is fast time-varying, the frequency-domain channel matrix of the MIMO SC-FDE system will be non-diagonal matrix, resulting in a serious inter-channel interference between the frequency-domain subchannels, resulting in a sharp degradation of the system performance. In order to solve this problem, the fractional Fourier domain equalization (MIMO SC-FrFDE) system of MIMO single carrier is proposed in this paper, which replaces the traditional frequency domain equalization in fractional Fourier domain equalization. The approximate diagonalization of the fractional Fourier domain channel matrix is realized by selecting the appropriate fractional Fourier transform order. The simulation results show that the proposed MIMO SC-Fr FDE system has better bit error rate (BER) performance than the traditional MIMO SC-FDE system in fast time-varying channels.
【作者單位】： 鄭州大學(xué)信息工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(No.61201251,No.61172086,No.61210005,No.61331021)
【分類號(hào)】：TN919.3
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