A Timing Asynchronous Full Duplex Digital Self-interference Suppression Method by Segment Convolution
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摘要: 同时同频全双工(CCFD)多载波信号时间异步场景下，有用信号(SoI)与自干扰信号(SI)多径最大时差超出循环前缀长度(CP)，有用信号与自干扰信号子载波不正交，造成频域自干扰抑制性能严重下降。针对上述问题，该文提出一种时间异步数字域分段卷积的自干扰抑制方法，建立了自干扰分段、频域重建、叠加抵消的自干扰抑制过程，提升了时间异步场景下自干扰抑制性能。理论和仿真结果表明，在异步场景下，采用分段卷积的自干扰抑制方法可以直接在频域重建自干扰，达到与同步场景相当的干扰抑制性能。Abstract: At the Co-frequency and Co-time Full Duplex (CCFD) multi-carrier signal time asynchronous scenario,, the maximum multipath time offset between the Signal of Interest (SoI) and the Self-Interference (SI) exceeds the length of the Cyclic Prefix (CP), which causes the decrease of the performance in the frequency domain self-interference cancellation. In view of this problem, a timing asynchronous self-interference suppression method by segment convolution is proposed; The relationship between the SI and the SoI is analyzed; The SI suppression process is established. Theoretical and simulation results show that the cancellation performance in the asynchronous state is equivalent to that in the synchronous state.
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[1] CRUICKSHANK D B. Implementing Full Duplexing for 5G[M]. Norwood: Artech House, 2020: 1–21. [2] MOHAMMADI M, CHALISE B K, SURAWEERA H A, et al. Design and analysis of full-duplex massive antenna array systems based on wireless power transfer[J]. IEEE Transactions on Communications, 2021, 69(2): 1302–1316. doi: 10.1109/TCOMM.2020.3035401 [3] YILAN M, AYAR H, NAWAZ H, et al. Monostatic antenna in-band full duplex radio: Performance limits and characterization[J]. IEEE Transactions on Vehicular Technology, 2019, 68(5): 4786–4799. doi: 10.1109/TVT.2019.2904138 [4] LI Jiamin, LV Qian, ZHU Pengcheng, et al. Network-assisted full-duplex distributed massive MIMO systems with beamforming training based CSI estimation[J]. IEEE Transactions on Wireless Communications, 2021, 20(4): 2190–2204. doi: 10.1109/TWC.2020.3040044 [5] 吴飞, 邵士海, 唐友喜. 基于容量和发射机预调零的全双工天线位置优化研究[J]. 电子与信息学报, 2016, 38(9): 2215–2220. doi: 10.11999/JEIT151385WU Fei, SHAO Shihai, and TANG Youxi. Location optimization of antenna based on the capacity and transmit interference pre-nulling in full-duplex[J]. Journal of Electronics &Information Technology, 2016, 38(9): 2215–2220. doi: 10.11999/JEIT151385 [6] QUAN Xin, LIU Ying, FAN Pingzhi, et al. Full-duplex transceiver design in the presence of phase noise and performance analysis[J]. IEEE Transactions on Vehicular Technology, 2021, 70(1): 558–571. doi: 10.1109/TVT.2020.3047076 [7] LU Hongtao, SHAO Shihai, DENG Kai, et al. Self-mixed self-interference analog cancellation in full-duplex communications[J]. Science China Information Sciences, 2016, 59(4): 042303. doi: 10.1007/s11432-015-5365-z [8] DEBAILLIE B, VAN DEN BROEK D J, LAVÍN C, et al. Analog/RF solutions enabling compact full-duplex radios[J]. IEEE Journal on Selected Areas in Communications, 2014, 32(9): 1662–1673. doi: 10.1109/JSAC.2014.2330171 [9] 黎斯, 鲁宏涛, 邵士海, 等. 全双工通信射频域自干扰抑制量对数字域自干扰抑制能力的影响[J]. 电子与信息学报, 2017, 39(6): 1278–1283. doi: 10.11999/JEIT160967LI Si, LU Hongtao, SHAO Shihai, et al. Impact of the amount of RF self-interference cancellation on digital self-interference cancellation in full duplex communications[J]. Journal of Electronics &Information Technology, 2017, 39(6): 1278–1283. doi: 10.11999/JEIT160967 [10] JIANG Yufei, DUAN Hanjun, ZHU Xu, et al. Toward URLLC: A full duplex relay system with self-interference utilization or cancellation[J]. IEEE Wireless Communications, 2021, 28(1): 74–81. doi: 10.1109/MWC.001.2000238 [11] HE Yimin, ZHAO Hongzhi, GUO Wenbo, et al. A time-robust digital self-interference cancellation in full-duplex radios: Receiver design and performance analysis[J]. IEEE Access, 2020, 8: 185021–185031. doi: 10.1109/ACCESS.2020.3029567 [12] EVERETT E, SAHAI A, and SABHARWAL A. Passive self-interference suppression for full-duplex infrastructure nodes[J]. IEEE Transactions on Wireless Communications, 2014, 13(2): 680–694. doi: 10.1109/TWC.2013.010214.130226 [13] AHMED E and ELTAWIL A M. All-digital self-interference cancellation technique for full-duplex systems[J]. IEEE Transactions on Wireless Communications, 2015, 14(7): 3519–3532. doi: 10.1109/TWC.2015.2407876 [14] AHMED E, ELTAWIL A M, and SABHARWAL A. Self-interference cancellation with nonlinear distortion suppression for full-duplex systems[C]. 2013 Asilomar Conference on Signals, Systems and Computers, Pacific Grove, USA, 2013: 1199-1203. doi: 10.1109/ACSSC.2013.6810483. [15] SHABOYAN S, BEHBAHANI A S, and ELTAWIL A M. Active cancellation of self-interference for full-duplex amplify and forward Wi-Fi relay[J]. IEEE Wireless Communications Letters, 2018, 7(6): 1050–1053. doi: 10.1109/LWC.2018.2857801 [16] SHABOYAN S, AHMED E, BEHBAHANI A S, et al. Frequency and timing synchronization for in-band full-duplex OFDM system[C]. GLOBECOM 2017 - 2017 IEEE Global Communications Conference, Singapore, 2017: 1-7. doi: 10.1109/GLOCOM.2017.8254928. [17] 许国平, 何维, 张欣, 等. 重叠剪切法频域均衡固有误差分析及其改进方法[J]. 电子与信息学报, 2008, 30(9): 2178–2181. doi: 10.3724/SP.J.1146.2007.00304XU Guoping, HE Wei, ZHANG Xin, et al. Analysis of inherent error of overlap-cut method frequency domain equalization and relating improvements[J]. Journal of Electronics &Information Technology, 2008, 30(9): 2178–2181. doi: 10.3724/SP.J.1146.2007.00304 [18] ETSI. ETSI TR 138 901-2018 5G Study on channel model for frequencies from 0.5 to 100 GHz (3GPP TR 38.901 version 14.3. 0 Release 14)[S]. 2018. -
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