...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Circuits and Systems I: Regular Papers, IEEE Transactions on >Efficiency Optimization for Burst-Mode Multilevel Radio Frequency Transmitters
【24h】

Efficiency Optimization for Burst-Mode Multilevel Radio Frequency Transmitters

机译：突发模式多电平射频发射机的效率优化

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The utilization of a burst-mode power amplifier (PA) together with pulse-width modulation (PWM) is a promising concept for achieving high efficiency in radio frequency (RF) transmitters. Nevertheless, such a transmitter architecture requires bandpass filtering to suppress side-band spectral components to retrieve the wanted signal, which reduces the transmit power and the transmitter efficiency. High efficiency can only be expected with the maximum transmit power and signals with low peak-to-average-power ratios (PAPRs). To boost efficiency for signals with high PAPRs and signals at variable transmit power levels, the burst-mode multilevel transmitter architecture has been widely discussed as a potential solution. This paper presents an efficiency optimization procedure of burst-mode multilevel transmitters for signals with high PAPRs and signals at variable transmit power levels. The impact of the threshold value on the transmitter efficiency is studied, where the optimum threshold value and the maximum transmitter efficiency can be obtained according to input magnitude statistics. In addition, the relation between the threshold value and the efficiency expression of burst-mode multilevel transmitters and those of Doherty PAs is investigated. It is shown that the obtained optimum threshold value, although originally designed for burst-mode transmitters, can also be applied to Doherty and multistage Doherty PAs to achieve maximum transmitter efficiency. Simulations are used to validate the efficiency improvement of the optimized burst-mode multilevel transmitters compared to two-level and non-optimized multilevel transmitters.
机译：突发模式功率放大器（PA）与脉宽调制（PWM）一起使用是在射频（RF）发射机中实现高效率的有前途的概念。然而，这样的发射机架构需要带通滤波以抑制边带频谱分量以检索有用信号，这降低了发射功率和发射机效率。只有最大的发射功率和低峰均功率比（PAPR）的信号才能实现高效率。为了提高具有高PAPR的信号和可变发射功率电平的信号的效率，猝发模式多电平发射器体系结构已被广泛讨论为一种潜在的解决方案。本文针对具有高PAPR的信号和可变发射功率电平的信号，提出了突发模式多电平发射机的效率优化程序。研究了阈值对发射机效率的影响，可以根据输入幅度统计获得最佳阈值和最大发射机效率。此外，还研究了突发模式多电平发射机与Doherty PA的阈值和效率表达式之间的关系。结果表明，尽管最初为突发模式发射机设计的，但获得的最佳阈值也可以应用于Doherty和多级Doherty PA，以实现最大的发射机效率。与两级和未优化的多级发射机相比，仿真用于验证优化的突发模式多级发射机的效率提高。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号