基于数值拟合的PCMA系统自干扰信号幅度估计算法
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摘要
针对卫星成对载波复用(PCMA)系统中的自干扰信号,提出基于数值拟合方法的幅度估计算法,并对其性能进行了分析。该算法适用于非对称和对称PCMA系统,可以有效抵消自干扰信号与有用信号互相关项不为零引起的误差,并且不会引入相位噪声,更符合工程应用实际。仿真结果表明,在干信比为12 dB的非对称PCMA系统中,该算法仍能获得较好的幅度估计精度,信噪比损失始终在0.1 dB左右。
A new amplitude estimation algorithm based on the numerical fitting in Paired Carrier Multiple Access(PCMA) satellite communication systems is proposed in this paper.The algorithm is applicable to both the asymmetric and symmetric PCMA systems.It can offset the error caused by the non-zero cross-correlation term without introducing phase noise,which is more corresponded to engineering practice.Simulation results show that the proposed algorithm can still achieve high estimation accuracy in the asymmetric PCMA system even when the interference to signal ratio is 12 dB,and the signal to noise ratio loss is always about 0.1 dB.
A new amplitude estimation algorithm based on the numerical fitting in Paired Carrier Multiple Access(PCMA) satellite communication systems is proposed in this paper.The algorithm is applicable to both the asymmetric and symmetric PCMA systems.It can offset the error caused by the non-zero cross-correlation term without introducing phase noise,which is more corresponded to engineering practice.Simulation results show that the proposed algorithm can still achieve high estimation accuracy in the asymmetric PCMA system even when the interference to signal ratio is 12 dB,and the signal to noise ratio loss is always about 0.1 dB.
引文
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[5]潘申富,白栋,依那,等.成对载波多址系统中干扰信号幅度的估计[J].真空电子技术,2003,21(2):21-24.PAN Shen-fu,BAI Dong,YI Na,et al.Estimation of inter-ference amplitude in PCMA system[J].Vacuum Electronics,2003,21(2):21-24.(in Chinese)
[6]公博,郭庆.PCMA系统自干扰频率估计新算法[J].通信技术,2010,43(11):37-38.GONG Bo,GUO Qing.A Novel Self-Interference Frequen-cy Estimation Algorithm in PCMA Systems[J].Communica-tions Technology,2010,43(11):37-38.(in Chinese)
[7]万坚,李明,朱中梁.一种新型卫星多址方式的分离新算法[J].系统仿真学报,2006,18(7):1799-1869.WAN Jian,LI Ming,ZHU Zhong-liang.A Novel SeparationAlgorithm of A New Multiple Access Mode in Satellite[J].Journal of System Simulation,2006,18(7):1799-1869.(in Chinese)
[8]徐彬,芮国胜,陈必然.一种单天线同频混合信号幅度的估计算法[J].电讯技术,2011,51(10):20-23.XU Bin,RUIGuo-sheng,CHEN B-i ran.AnAmplitude Est-imation Algorithm for Co-frequencyMixturewith Single Anten-na[J].Telecommunication Engineering,2011,51(10):20-23.(in Chinese)
[2]Huang X D,Wang Z,Huo G Q.New method of estimationof phase,amplitude,and frequency based all phase fft spec-trum analysis[C]//Proceedings of 2007 International Sympo-sium on Intelligent Signal Processing and Communication Sys-tems.Xiamen:IEEE,2007:284-287.
[3]Wu J K,Long J,Liang Y.Estimation of frequency,ampl-itude and phase ofsinusoidal signals[C]//Proceedings of2004IEEE International Symposium on Industrial Electronics.Ajac-cio,France:IEEE,2004:353-356.
[4]田文科,王剑,山秀明.PCMA自适应自干扰对消算法与仿真[J].电讯技术,2011,51(9):78-82.TIAN Wen-ke,WANG Jian,SHAN Xiu-ming.Adaptive In-terference Cancellation for Paired CarrierMultiple Access[J].Telecommunication Engineering,2011,51(9):78-82.(in Chinese)
[5]潘申富,白栋,依那,等.成对载波多址系统中干扰信号幅度的估计[J].真空电子技术,2003,21(2):21-24.PAN Shen-fu,BAI Dong,YI Na,et al.Estimation of inter-ference amplitude in PCMA system[J].Vacuum Electronics,2003,21(2):21-24.(in Chinese)
[6]公博,郭庆.PCMA系统自干扰频率估计新算法[J].通信技术,2010,43(11):37-38.GONG Bo,GUO Qing.A Novel Self-Interference Frequen-cy Estimation Algorithm in PCMA Systems[J].Communica-tions Technology,2010,43(11):37-38.(in Chinese)
[7]万坚,李明,朱中梁.一种新型卫星多址方式的分离新算法[J].系统仿真学报,2006,18(7):1799-1869.WAN Jian,LI Ming,ZHU Zhong-liang.A Novel SeparationAlgorithm of A New Multiple Access Mode in Satellite[J].Journal of System Simulation,2006,18(7):1799-1869.(in Chinese)
[8]徐彬,芮国胜,陈必然.一种单天线同频混合信号幅度的估计算法[J].电讯技术,2011,51(10):20-23.XU Bin,RUIGuo-sheng,CHEN B-i ran.AnAmplitude Est-imation Algorithm for Co-frequencyMixturewith Single Anten-na[J].Telecommunication Engineering,2011,51(10):20-23.(in Chinese)