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Application of piecewise linear amplification technology in high peak-to-average power ratio system

A piecewise linear, technical technology, applied in the field of communication, to achieve the effect of eliminating nonlinear distortion, improving bit error rate performance, and high degree of linearization

Inactive Publication Date: 2014-01-08
XIDIAN UNIV
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Problems solved by technology

The SPG method can achieve the purpose of linearization without using additional linearization devices, but the degree of linearization is closely related to the number of amplifiers used at the same time, and more amplifiers are needed to achieve better linear amplification characteristics.

Method used

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  • Application of piecewise linear amplification technology in high peak-to-average power ratio system
  • Application of piecewise linear amplification technology in high peak-to-average power ratio system
  • Application of piecewise linear amplification technology in high peak-to-average power ratio system

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Embodiment Construction

[0029] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0030] refer to figure 1 , the segmented linear amplification technique of the present invention, specifically:

[0031] Introducing the distribution ratio λ, the input signal amplitude x is divided into two parts λx and (1-λ)x through the signal distributor, and sent to two amplifiers PA1 and PA2 for amplification processing, and finally the output signal power of the two amplifiers Output after synthesis for sending. Since the input signal is segmented and amplified by two amplifiers, its equivalent dynamic range is extended to the sum of the dynamic ranges of the two amplifiers, which greatly improves the adaptability to peak signals and reduces the influence of saturation distortion; On the other hand, by adjusting the distribution ratio λ, SL-PA does not need to use additional linearization devices on the branch, and uses the nonli...

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Abstract

The invention discloses the piecewise linear amplification technology. The piecewise linear amplification technology is characterized in that a distribution ratio lambda is introduced, the input signal amplitude x is segmented into a lambda x portion and a (1-lambda)x portion through a signal distributor, the two portions are sent to two amplifiers to be processed respectively, and finally, the power of an output signal of one amplifier and the power of an output signal of the other amplifier are synthesized, output and used for transmission. The piecewise linear amplification technology has the advantages that the signals are amplified through the two power amplifiers connected in parallel simultaneously, so that the purposes that the saturation range of power amplification is expanded and saturation distortion of power amplification is eliminated are achieved; a signal decomposer is additionally arranged and non-linear distortion of power amplification is eliminated due to the adoption of the signal distribution ratio self-adaption updating technology; a simulation result show that non-linear distortion and saturation distortion of power amplification can be simultaneously eliminated through the piecewise linear amplification technology, the error rate performance of a receiving end can be improved under the condition that any extra linear device is not additionally arranged, meanwhile, the structure is simple, and the linearization degree is high.

Description

technical field [0001] The invention relates to the application of a piecewise linear amplification technology in a peak-to-average ratio system, which belongs to the communication field. Background technique [0002] With the rapid development of wireless communication systems, OFDM (Orthogonal Frequency Division Multiplexing) and other modulation techniques with peak-to-average ratio characteristics are more and more widely used. However, as an indispensable power amplifier module in a communication system, its nonlinear distortion and saturation distortion have caused a great negative impact on the communication system. For the peak-to-average ratio signal, the nonlinear distortion of the amplifier will cause the signal to be amplified nonlinearly, and the signal spectrum will be extended out of band, greatly reducing the bit error rate performance of the receiving end. [0003] At the same time, due to the existence of amplifier saturation distortion, it will cause satu...

Claims

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Application Information

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IPC IPC(8): H03F1/32
Inventor 任智源张海林武德斌李丹萍安永宁
Owner XIDIAN UNIV
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