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

Qi TANG; Jun-min JIANG; Meng XIA

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

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

Papers | 更新时间：2024-06-05

- Amplitude and phase errors calibration method in satellite-borne dynamic power allocation network
- Journal on Communications Vol. 38, Issue 4, Pages: 1-07(2017)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61302133);Special Research Program of Education Department of Shaanxi Provincial Government(14JK1678)
- DOI：10.11959/j.issn.1000-436x.2017078
  CLC： TN957
- Online First：2017-04，
  
  Published：25 April 2017
- 稿件说明：
移动端阅览
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.
DOI：

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

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。

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.

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references

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