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Power-extensible beam directional digital pre-distortion device and method, and transceiving system

A digital predistortion and beam steering technology, applied in transmission systems, power amplifiers, synchronization/start-stop systems, etc., can solve problems such as inability to achieve complex feedback, and achieve reduced computational complexity, strong universality, and strong robustness Effect

Active Publication Date: 2019-07-05
TSINGHUA UNIV
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Problems solved by technology

[0009] It can be seen that there are a large number of complex feedback problems that cannot be realized in the basic BO-DPD scheme in the prior art

Method used

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  • Power-extensible beam directional digital pre-distortion device and method, and transceiving system
  • Power-extensible beam directional digital pre-distortion device and method, and transceiving system
  • Power-extensible beam directional digital pre-distortion device and method, and transceiving system

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Embodiment Construction

[0049] The beam-directed DPD technology in the prior art is generally based on the idea of ​​modeling a single power amplifier, but there are a large number of complex feedback problems that cannot be realized. In view of this, for the complex feedback problem that cannot be realized in the basic BO-DPD scheme, the present invention proposes a practical power-scalable beam-oriented DPD (PSBO-DPD) scheme to further improve the previous BO-DPD technology. Based on the assumption of PA consistency, the proposed DPD can save hardware resources by using only one feedback path (a coupler and the device after the coupler) in the subarray, and make up for the deficiency of the current BO-DPD. In addition, it is more practical to use a cascaded power-scalable model with selectable power in order to estimate the output of all PAs with limited feedback information. And the linearization of the main beam direction signal is realized by considering the power amplifier, phase shifter, varia...

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Abstract

A power-extensible wave beam directional digital pre-distortion device comprises: a DPD module for performing DPD processing on one path of input signal; a beam splitting gain module which is used forcarrying out beam splitting and gain adjustment on the DPD processing signal; N power amplifiers which are used for carrying out power amplification on the N paths of gain signals and determining N paths of power amplification signals; a coupler which determines one path of coupling signal; a modeling module which is used for determining a power extensible model according to the power level, theinput signal and the coupling signal, and determining N paths of extensible power amplifier signals according to the current input signal and the power extensible model; a beam combining training module which is used for carrying out beam combining on the N paths of extensible power amplifier signals, determining beam combining signals, carrying out DPD training according to the beam combination signal, and updating a DPD module. The power amplifier, the phase shifter, the variable gain amplifier and the antenna array are regarded as a nonlinear system for overall modeling, linearization of main beam direction signals is achieved, and the difficulty that complex feedback cannot be achieved in an actual system is overcome.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a beam directional digital predistortion device and method with scalable power, and a transceiver system. Background technique [0002] With the increasing advancement of communication networks, the growing demand for data capacity and spectral efficiency has accelerated the evolution of wireless networks to fifth-generation (5G) communications. The widespread application of 5G mobile communications requires the development of some key technologies, one of which is massive MIMO technology. Thanks to the large scale and high integration of the array, the array size of the massive MIMO system can reach tens or even hundreds of times of the current 4G MIMO system, thus supporting more spatial multiplexing streams than the MIMO system to improve transmission rate. [0003] Massive MIMO arrays need to be supplemented by beamforming systems for spatial multiplexi...

Claims

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Application Information

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IPC IPC(8): H04L25/49H04B7/06H03G3/30H03F3/24H03F3/213H03F1/32
CPCH03F1/3247H03F3/213H03F3/245H03G3/3042H04B7/0617H04L25/49Y02D30/70
Inventor 陈文华刘昕陈龙
Owner TSINGHUA UNIV
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