【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。更多还原

【Abstract】 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.更多还原