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Method and device for improving the efficiency of LINC transmitter

A transmitter and high-efficiency technology, applied to electrical components, transmission systems, etc., can solve the problems of large heat loss and low overall efficiency of the synthesizer, and achieve the effects of power reduction, improved efficiency, and small out-of-phase angle

Inactive Publication Date: 2015-01-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Application Information

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Problems solved by technology

Although the linearity of the traditional LINC structure is very good, due to its anisotropic synthesis, the heat loss in the synthesizer is relatively large, making the overall efficiency low

Method used

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  • Method and device for improving the efficiency of LINC transmitter
  • Method and device for improving the efficiency of LINC transmitter
  • Method and device for improving the efficiency of LINC transmitter

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Embodiment Construction

[0021] The present invention will be further introduced and illustrated below in conjunction with the accompanying drawings and embodiments.

[0022] figure 1 The schematic diagram of the device for improving the LINC transmitter efficiency proposed by the present invention includes a signal separation module, a phase modulation module, a power amplification module and a power combiner, the signal separator is a multi-threshold signal separator, and the power amplifier is A multi-channel Doherty power amplifier, the power combining module is an isolated combiner. After the baseband signal S(t) passes through the multi-threshold signal separator, it becomes two equal-amplitude phase-modulated signals S 1 (t) and S 2 (t), two equal-amplitude signals are amplified by multiple Doherty power amplifiers after up-conversion, and the two amplified signals are combined into one signal S after passing through a Wilkinson power combiner o (t).

[0023] The type of the power combiner ...

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Abstract

The invention provides a method and device for improving the efficiency of an LINC transmitter and belongs to the technical field of wireless communication. The method for improving the efficiency of the LINC transmitter comprises the flowing steps that (1) multi-threshold signal separation and phase modulation are carried out on baseband signals, and the baseband signals are converted into two paths of constant amplitude phase modulation signals; (2) the two paths of constant amplitude phase modulation signals obtained after signal separation and phase modulation are carried out enter a multipath Dherty power amplifier to carry out signal amplification, then an isolation synthesizer is used as a power synthesis module, and the two paths of amplified constant amplitude phase modulation signals are synthesized into one path of signals through the isolation synthesizer. According to the method and device for improving the efficiency of the LINC transmitter, due to the fact that multi-threshold signal constant amplitude separation is carried out, the out-phase angle is small, the power consumed by the synthesizer is lowered, the efficiency of the isolation synthesizer is improved, and the defect that the linearity is poor when a non-isolation synthesizer is adopted; it can be guaranteed that the LINC transmitter has high linearity, and the problem that an existing LINC transmitter is lower in efficiency is solved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method and a device for improving the efficiency of a LINC transmitter. Background technique [0002] With the continuous development of wireless communication technology, the mobile communication system is required to have greater data transmission rate and data capacity. In addition, in the case of increasingly crowded spectrum, in order to improve spectrum utilization, complex constant-envelope modulation is often used, so that mobile signals have a high peak-to-average power ratio. As far as the power amplifier is concerned, the maximum efficiency of a single-tube power amplifier is generally achieved at saturation, and the non-constant envelope signal for the peak-to-average ratio cannot give full play to its high efficiency advantages, and the ensuing problem is that it needs to use more complex technology to ensure linearity and efficiency at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04
Inventor 何松柏杨辰陈金虎彭瑞敏
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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