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Digital predistortion apparatus suitable for TD-SCDMA time-division system

A technology of digital predistortion and analog-to-digital converters, which is applied in radio relay systems, power management, electrical components, etc., can solve the problems of high cost and high calorific value, and achieve improved efficiency, high power, and reduced adjacent channel leakage power Effect

Active Publication Date: 2011-10-26
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of ensuring the linear operation of the power amplifier, in order to increase the output power of the power amplifier, high-power tubes must be used, but the cost of high-power power amplifier tubes is very high, and the heat generation is higher

Method used

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  • Digital predistortion apparatus suitable for TD-SCDMA time-division system
  • Digital predistortion apparatus suitable for TD-SCDMA time-division system
  • Digital predistortion apparatus suitable for TD-SCDMA time-division system

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Embodiment Construction

[0026] The components of the DPD architecture of the present invention are as follows: figure 1 As shown, according to the characteristics of time-division systems such as TD-SCDMA, the receiving channel is multiplexed in the sending and receiving system to complete the collection of DPD signals. The architecture is divided into three parts, the middle RF channel and interface control part K1, the power amplifier and low noise amplifier part K2, and the filter component part K3.

[0027] The specific internal implementation is described in detail below.

[0028] Part K1 is divided into uplink and downlink channels, timing control, and data interface. The uplink path is the receiving path, the downlink path is the sending path, the timing control part is to control timing management and uplink and downlink data transmission, and the data interface part is the baseband frame data of the receiving optical port and the sending optical port. Uplink paths include 102, 104, 106, 10...

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Abstract

The invention relates to the digital pre-distortion device used in the base station equipment of the timing system, including the RF Ministry and the interface control division, a power amplifier and a filter module with an antenna interface connected in sequence. The device also includes: a reuse RF channel and Interface Control Division, the detection channel formed by the downlink receiving channel of the power amplifier which is used for detecting the inter-modulation and the inter-modulation component, derive the power amplifier characteristics and do the digital pre-distortion calculation and the compensation of the base-band sending signal in the RF channel and Interface Control Division. The invention can reduce the leakage ratio between the adjacent channels, increase the power amplifier efficiency and achieve the purpose of reducing the power amplifier cost and improving the efficiency.

Description

technical field [0001] The invention relates to a base station equipment in mobile communication, in particular to a digital predistortion device suitable for TD-SCDMA time division system. Background technique [0002] As 3G large-scale commercialization is approaching day by day, TD-SCDMA, as China's own 3G standard, will become the first standard with a 3G license in China, so the commercialization process of TD-SCDMA system is more urgent. At the same time, the commercial prospect of TD-SCDMA is increasingly clear. In the future competition of TD products, cost will become the main focus for communication base station equipment manufacturers. The power amplifier used in the current communication system works in the linear region. The power amplifier type is AB power amplifier, and the efficiency is low. For the peak-to-average ratio input signal, if the power amplifier is to work in the linear region, the average power of the input signal must be reduced. At the same ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/04H04B7/14
Inventor 穆学禄潘卫明
Owner ZTE CORP