System and method for implementing mutual compensation between despicking and digital predistortion

A technology of digital pre-distortion and peak-shaving parameters, which is applied in transmission control/equalization, angle modulation signal limiter, advanced technology, etc., and can solve the constraints of signal irreversible damage and reduction of peak-to-average ratio of CFR equipment signals and other problems, to achieve the effect of improving EVM deterioration, good signal EVM, and achieving signal peak-to-average ratio

Active Publication Date: 2008-08-20
ZTE CORP
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Problems solved by technology

However, the CFR device and DPD device in the system are used as independent devices to process the signal. Due to the irreversible damage to the signal in the process of reducing the peak-to-average ratio of the CFR device, the CFR device reduces the peak-to-average ratio of the signal. get heavily constrained

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  • System and method for implementing mutual compensation between despicking and digital predistortion
  • System and method for implementing mutual compensation between despicking and digital predistortion
  • System and method for implementing mutual compensation between despicking and digital predistortion

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Embodiment 2

[0065] System Embodiment 2: When the CFR and DPD comprehensive processing equipment adopts the pass-through processing mode, the CFR and DPD comprehensive processing equipment is located on the main link of signal input and output. Such as Figure 7 As shown, in this embodiment, the system for realizing mutual compensation between CFR and DPD includes: a CFR device 121 , a DPD device 221 and a CFR and DPD comprehensive processing device 321 . And the CFR and DPD integrated processing device 321 is located on the main link where the input signals I_In and Q_In, and the output signals I_Out and Q_Out are located.

[0066] Wherein, the CFR and DPD comprehensive processing device 321 includes a CFR and DPD optimization module 3211 , a CFR control interaction module 3212 and a DPD control interaction module 3213 .

[0067] Here, the CFR and DPD optimization module 3211 is used to pre-set the peak clipping parameters and issue them; in the processing mode of straight-through proces...

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Abstract

The present invention discloses a system which is realized with crest factor reduction and digital predistortion mutual compensation. The system comprises a crest factor reducing (CFR) equipment and a digital predistortion (DPD) equipment, and the system also comprises a CFR and DPD comprehensive processing equipment which is used for controlling and optimization-processing the signal processed by the CFR equipment and the DPD equipment and realizing the mutual compensation between the signals processed by the CFR equipment and the DPD equipment. The invention also discloses a method for realizing the crest factor reduction and digital predistortion mutual compensation. The principle that a converse relationship exists between the processions of CFR equipment and the DPD equipment is used for reducing the non-recoverable damage of the signal by the CFR equipment. Thereby the reducing of the signal peak-to-average ratio is effectively realized. The linearity of the power amplifying is increased while the power amplifying efficiency is increased.

Description

technical field [0001] The present invention relates to the technology of mutual compensation of signals, in particular to a system and method for realizing mutual compensation of peak clipping (CFR, CrestFactor Reduction) technology and digital predistortion (DPD, Digital PreDistortion) technology Background technique [0002] In modern communication systems, such as the design of base station power amplifier systems, high power amplifier efficiency and high linearity are the main requirements for the design of base station power amplifier systems, while the mainstream signals used in modern communications are higher peak-to-average signals that carry more information Compared with the broadband non-constant envelope signal, the large signal peak generated by the non-constant envelope signal will affect the power amplifier efficiency and linearity of the base station power amplifier system. At present, when designing base station power amplifier systems, CFR technology and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H03G11/06
CPCY02D30/70
Inventor 戴征坚邓英茹洪涛
Owner ZTE CORP
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