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Distributed power supply modulation amplifier with filtering function

A distributed power supply and power supply modulation technology, which is applied in the direction of power amplifiers, amplifiers with semiconductor devices/discharge tubes, amplifiers, etc., can solve problems such as difficulty in meeting the requirements for near-carrier rejection and low input signal rejection

Inactive Publication Date: 2019-10-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the figure, it can be seen that the input signal has a suppression degree of nearly 60dB at the near-carrier end, but without digital pre-distortion processing, the suppression degree of the ET power amplifier is only about 20dB, which is difficult to meet the suppression degree of the modern communication system on the near-carrier end. Require
It can be further found that the ET power amplifier only has a suppression degree close to the maximum of about 50dB after ETMP and MP digital pre-distortion respectively, which is lower than the suppression degree of the input signal

Method used

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  • Distributed power supply modulation amplifier with filtering function
  • Distributed power supply modulation amplifier with filtering function
  • Distributed power supply modulation amplifier with filtering function

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Embodiment Construction

[0018] In order to make the implementation purpose and technical solution of the present invention more clear, the parallel form and the cascade connection will be theoretically analyzed respectively. In the following, the parallel form of the distributed power modulation amplifier with filtering function will be taken as an example to describe the implementation process of the whole scheme. .

[0019] The structural block diagram of the distributed power modulation amplifier with filtering function in parallel connection is as follows: image 3 As shown, the design order of the filter in the figure is fourth order, mainly composed of four modules:

[0020] Signal distributor module 00: The main function is to realize the equal division of the input signal, which is used for the input of different delay links later.

[0021] Delay module 10: composed of delay units with different delays, its main function is to delay the same input signal for different times and send it to th...

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Abstract

The invention discloses a distributed power supply modulation amplifier with a filtering function, belongs to the field of wireless communication, and particularly relates to a distributed power supply modulation amplifier. A digital filter is successfully embedded into the power supply modulation amplifier by utilizing the gain characteristic of the power supply modulation amplifier. On the basisof meeting high efficiency, the suppression degree of a near-carrier end and a sideband is increased, and the filter and the power amplifier are integrated together, so that the system is simplified,the cost is reduced, the volume density of the whole transmitter system is improved, and the transmitter is very suitable for the design of an integrated circuit. Such a structure also has reconfigurability.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a distributed power modulation amplifier. Background technique [0002] In recent years, wireless communication technology has been in a stage of rapid development. As one of the key components of the wireless communication system, the performance of the power amplifier has a crucial impact on the entire system. In order to adapt to the complexity of modern communication signals, higher requirements are put forward for the performance of power amplifiers such as linearity, efficiency, and bandwidth. [0003] High-efficiency power amplifiers have always been a research hotspot, mainly focusing on switching power amplifiers and power modulation power amplifiers. Switching power amplifiers, such as E-class power amplifiers, F-class power amplifiers, inverse F-class power amplifiers, J-class power amplifiers, etc., the main principle is to control the harmonics of the signal, ...

Claims

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Application Information

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IPC IPC(8): H03F1/02H03F3/213H03F3/24H03G3/30H03H17/00
CPCH03F1/0211H03F3/213H03F3/245H03G3/3042H03G2201/206H03G2201/208H03H17/0009H03H2017/0081
Inventor 游飞肖泽华何松柏
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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