| 摘要: |
| 针对高阶APSK调制在卫星信道中存在有记忆非线性失真的现象，提出一种联合补偿算
法，该算法充分利用APSK调制信号星座图的特点，在大幅度减小无记忆数据预失真计算量的
基础上，联合非线性均衡实现对有记忆非线性卫星信道的自适应补偿。其优点是存储量和计
算复杂度随调制阶数的增加变化很小。仿真结果表明，该算法能够达到有记忆数据预失真的
补偿性能，且最佳工作点提高0.2 dB。 |
| 关键词: 卫星信道 APSK调制 数据预失真 非线性 自适应补偿 |
| DOI： |
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| 基金项目: |
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| Nonlinear Distortion Compensation Algorithm for High Level APSK Modulations over Satellite Channels |
| XU Guang-fei,ZHANG Bang-ning,GUO Dao-xing |
| (Department of Satellite Communication, Institute of Communications Engineering,PLA University of Science and Technology, Nanjing 210007,China) |
| Abstract: |
| To compensate the nonlinear distortion of highlevel APSK modulations
over satellite channels, a combined compensation scheme is proposed based on th
e characteristic of APSK,which combines a simple memoryless data
predistortion with nonlinear equalization to realize the adaptive compensation
for nonlinear satellite channels with memory. The simulation results show that t
he scheme not only can achieve the compensation performance of data predistort
ion with memory, but also has 0.2 dB gain for the optimization operating poi
nt. |
| Key words: satellite channels APSK modulation data predistortion nonlinear adaptive compen
sation |
