星载功率动态分配网络幅相误差校准方法

doi:10.11959/j.issn.1000-436x.2017078

通信学报 ›› 2017, Vol. 38 ›› Issue (4): 1-07.doi: 10.11959/j.issn.1000-436x.2017078

• 学术论文 • 下一篇

星载功率动态分配网络幅相误差校准方法

汤琦¹,蒋军敏¹,夏猛²

¹ 西安邮电大学电子工程学院，陕西西安 710121
² 西安科技大学通信与信息工程学院，陕西西安 710054

修回日期:2017-02-23 出版日期:2017-04-01 发布日期:2017-07-20
作者简介:汤琦（1975-），男，安徽枞阳人，博士，西安邮电大学副教授，主要研究方向为阵列信号与通信信号处理、多目标跟踪等。|蒋军敏（1977-），女，河北晋州人，西安邮电大学副教授，主要研究方向为通信信号处理与现代通信网等。|夏猛（1981-），男，陕西安康人，博士，西安科技大学副教授，主要研究方向为通信信号处理与雷达信号处理等。
基金资助:
国家自然科学基金资助项目(61302133);陕西省教育厅科研计划基金资助项目(14JK1678)

Amplitude and phase errors calibration method in satellite-borne dynamic power allocation network

Qi TANG¹,Jun-min JIANG¹,Meng XIA²

¹ Electrical Engineering College,Xi'an University of Posts ＆ Telecommunications,Xi'an 710121,China
² Communication and Information Engineering College,Xi'an University of Science and Technology,Xi'an 710054,China

Revised:2017-02-23 Online:2017-04-01 Published:2017-07-20
Supported by:
The National Natural Science Foundation of China(61302133);Special Research Program of Education Department of Shaanxi Provincial Government(14JK1678)

摘要/Abstract

摘要：

针对移动通信卫星不同波束通信业务量分布不均衡导致下行波束的发射功率差异大问题，给出功率动态分配网络实现结构，该结构根据通信业务量需求自适应分配发射波束功率，同时保证功率放大器的工作点基本一致；针对功率动态分配网络在存在幅相误差时的输出信号互耦，从而导致波束性能急剧下降问题，提出一种功率动态分配网络幅相误差校准方法。该方法利用正交零相关（ZCZ,zero-correlation zone）序列在零相关区间内正交互相关特性实现校准信号间的解耦；零相关区间内具有优异的自相关特性，通过降低校准信号的发射功率，使校准的同时不影响正常通信性能。性能仿真和远场测试结果表明：在校准信号功率比通信信号功率低10 dB时，校准后的幅度误差小于0.1 dB，相位误差小于0.3°，实测波束主瓣内增益损失小于0.2 dB。

关键词: 卫星通信, 功率动态分配, 幅相误差校准, ZCZ序列

Abstract:

For the mobile communication satellite each beam communication traffic distribution was not balanced,leading to differences in transmission power of downlink beam.The implementation architectures of dynamic power allocation network was given,which could allocate the transmitting beam power automatically according to the traffic demand,at the same time ensured the high efficiency of power amplifier.Because the performance of dynamic power allocation network was severely impaired by the mutual coupling among signals when amplitude/phase mismatch was existed,which led to a sharp drop in beam performance.A calibration method for the amplitude and phase errors was proposed.The decoupling of calibration signal was realized by using the cross-correlation orthogonal characteristic of the orthogonal zero-correlation zone (ZCZ) sequences in the zero correlation interval,and communication was free from calibration by reducing the transmit power for the excellent self-correlation characteristic of the ZCZ sequences.Performance simulation and far field test show that under the condition that the calibration signal power is less than the normal signal 10 dB,the amplitude error is less than 0.1 dB,the phase error is less than 0.3°,and the gain loss within the main lobe is less than 0.2 dB after calibration.

Key words: satellite communication, dynamic power allocation, amplitude and phase errors calibration, ZCZ sequence

中图分类号:

TN957

汤琦,蒋军敏,夏猛. 星载功率动态分配网络幅相误差校准方法[J]. 通信学报, 2017, 38(4): 1-07.

Qi TANG,Jun-min JIANG,Meng XIA. Amplitude and phase errors calibration method in satellite-borne dynamic power allocation network[J]. Journal on Communications, 2017, 38(4): 1-07.

图/表 9

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通道号	校准前		校准后
通道号	幅度/dB	相位/^o	幅度/dB	相位/^o
1	0.000	0.000	0.000	0.000
2	0.288	0.360	-0.039	0.080
3	0.350	4.833	-0.087	-0.090
4	0.277	4.130	-0.072	0.076
5	-1.070	3.470	-0.040	0.296
6	-0.588	7.420	-0.030	0.256
7	0.287	3.990	-0.070	0.090
8	-1.140	2.944	-0.044	0.240
9	0.295	4.415	-0.070	0.040
10	-1.035	-1.270	-0.036	0.270
11	0.255	0.686	0.029	0.245
12	0.208	0.528	-0.038	0.260

星载功率动态分配网络幅相误差校准方法

Amplitude and phase errors calibration method in satellite-borne dynamic power allocation network

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