| 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。 |
| 关键词: 卫星通信系统 成对载波复用 非对称PCMA 幅度估计 数值拟合 |
| DOI：doi:10.3969/j.issn.1001-893x.2013.06.011 |
|
| 基金项目: |
|
| Amplitude estimation based on numerical fitting of interference signal in PCMA systems |
| CAI Yun-cheng,MA Zheng-xin,WANG Yu-han |
| () |
| Abstract: |
| A new amplitude estimation algorithm based on the numerical fitting
in Paired Carrier Multiple Access (PCMA) satellite communication systems is pro
posed in this paper. The algorithm is applicable to both the asymmetric and symm
etric PCMA systems. It can offset the error caused by the non-zero cross-corre
lation term without introducing phase noise, which is more corresponded to enginee
ring practice. Simulation results show that the proposed algorithm can still ach
ieve high estimation accuracy in the asymmetric PCMA system even when the interf
erence to signal ratio is 12 dB, and the signal to noise ratio loss is alway
s about 0.1 dB. |
| Key words: satellite communication system paired carrier multiple access (PCMA) asymmetric PCMA amplitude estimation numerical fitting |
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