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Multi-antenna communication system and gain control method thereof

A communication system and gain control technology, applied in diversity/multi-antenna systems, synchronization/start-stop systems, baseband system components, etc., can solve problems such as inconsistencies in transmit link gains, achieve hardware cost savings, and improve stability.

Active Publication Date: 2013-05-01
COMBA TELECOM SYST CHINA LTD
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  • Claims
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Problems solved by technology

[0004] In order to solve the problem of inconsistency in the gains between the transmission links of the multi-antenna communication system in the prior art, the present invention provides a multi-antenna communication system that can keep the gains between the transmission links consistent

Method used

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  • Multi-antenna communication system and gain control method thereof
  • Multi-antenna communication system and gain control method thereof
  • Multi-antenna communication system and gain control method thereof

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Embodiment Construction

[0034] see figure 1 , figure 1 It is a structural schematic diagram of the multi-antenna communication system of the present invention.

[0035] The multi-antenna communication system 10 includes a plurality of transmission links, each of which includes a power amplifier 13. In this embodiment, a plurality of transmission links share a multi-channel digital baseband processing module 11 to process the baseband signal. The multi-channel digital baseband signals transmitted in the digital baseband processing module 11 are sent to the corresponding power amplifier 13 for processing after analog-to-digital conversion, up-conversion and filtering processing, and then output to different power amplifiers by the power amplifier 13. sent by the transceiver antenna.

[0036] The multi-antenna communication system 10 also includes a DPD feedback channel 15 connected between the output terminals of each of the power amplifiers 13 and the digital baseband processing module 11 .

[003...

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Abstract

The invention provides a multi-antenna communication system and a gain control method thereof with a DPD (Digital Phase Discriminator) feedback channel. The method comprises the following steps of: respectively calculating feedback power of a plurality of transmitting chains of the multi-antenna communication system; respectively calculating forward power of the plurality of transmitting chains according to digital baseband signals transmitted in each transmitting chain; respectively calculating gain values of each transmitting chain according to the feedback power and the corresponding forward power to acquire gain offset values of each transmitting chain through comparing the gain values and target gain values; and respectively regulating the gains of each transmitting chain according to the gain offset values. By applying the gain control method, the invention can ensure that the output power of the plurality of transmitting chains of the multi-antenna communication system is more stable in the full frequency band range, and can keep the gains consistent so that the multi-antenna communication system maintains favorable communication performance.

Description

technical field [0001] The invention relates to the technical field of multi-antenna communication systems, in particular to the gain control technology of a multi-antenna communication system with a DPD feedback channel. Background technique [0002] DPD (Digital Pre-Distortion, digital pre-distortion) technology is a technology to solve the nonlinear distortion of the power amplifier in the communication system. Usually, the communication system using DPD technology has a special DPD feedback channel for extracting the output of the power amplifier. signal, calculate the nonlinear distortion of the power amplifier after processing according to the output signal, and then perform nonlinear distortion compensation on the baseband signal input to the power amplifier in advance, and the nonlinear distortion compensation value is the same as that of the power amplifier The non-linear distortion complements each other, so that the non-linear distortion of the output signal of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/49H04B7/06H04L25/03
Inventor 方绍湖刁穗东杨波吕辉李繁宋伟青
Owner COMBA TELECOM SYST CHINA LTD
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