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Method and device for reducing peak-to-average power ratio of FBMC-OQAM signal

A technology of average power and signal peak, which is applied in the field of reducing the peak-to-average power ratio of FBMC-OQAM signals, and can solve problems such as large amount of calculation and slow response speed

Active Publication Date: 2016-06-15
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
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  • Application Information

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Problems solved by technology

[0039] 2), the amount of calculation is large, so that the response speed of the system is slow

Method used

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  • Method and device for reducing peak-to-average power ratio of FBMC-OQAM signal
  • Method and device for reducing peak-to-average power ratio of FBMC-OQAM signal
  • Method and device for reducing peak-to-average power ratio of FBMC-OQAM signal

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Embodiment Construction

[0113] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0114] Suppose there are L frequency domain symbols to be sent, and each frequency domain symbol contains M subcarriers, see image 3 with Figure 4 A kind of method that reduces FBMC-OQAM signal peak-to-average power ratio that the embodiment of the present invention provides, comprises the steps:

[0115] Step S1, obtain the symbol C to be sent l,m ;C l,m =R l,m +j·I l,m , 0≤l≤L-1, 0≤m≤M-1.

[0116] Among them, C l,m Represent the mth subcarrier symbol of ...

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Abstract

Embodiments of the invention disclose a method and a device for reducing a peak-to-average power ratio of an FBMC-OQAM (Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation) signal, relating to the communication technical field. The method comprises the following steps of obtaining a to-be-sent symbol; generating a phase rotation factor vector; mapping the to-be-sent symbol to a real number symbol; obtaining a real number symbol after phase rotation; modulating the real number symbol after each phase rotation to obtain a modulated time domain signal; computing the PAPR (Peak-to-Average Power Ratio) for each modulated time domain signal; obtaining a phase rotation factor vector corresponding to the minimum PAPR and taking the phase rotation factor vector as an optimal phase rotation factor vector; obtaining a real number symbol after optimal phase rotation; and modulating the real number symbol after optimal phase rotation to time domain signal to send. By applying the embodiments, the real part data and the imaginary part data of the FBMC-OQAM signal are respectively corresponding to one optimal phase rotation factor vector, so that the PAPR of the FBMC-OQAM signal is further reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for reducing the peak-to-average power ratio of FBMC-OQAM (FilterBankMulticarrierwithOffsetQuadratureAmplitudeModulation, filter bank multicarrier modulation technology based on offset quadrature amplitude) signal. Background technique [0002] FBMC-OQAM, as a kind of FBMC (Filter Bank based Multicarrier, filter bank multi-carrier technology) system implementation method, has become one of the core technologies of the future new generation wireless communication system. [0003] The FBMC-OQAM system adopts the carrier orthogonal condition, and what is sent is an interleaved quadrature amplitude modulation signal. The imaginary part signal of the complex signal is delayed by T / 2 compared with the real part signal (T is the length of a FBMC-OQAM symbol), and then the actual The part signal and the imaginary part signal are then misplaced and added...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04B2201/70706H04L27/2614H04L27/2621
Inventor 刘凯明张鹏刘元安张洪光谢刚袁东明吴永乐胡鹤飞苏明
Owner BEIJING UNIV OF POSTS & TELECOMM
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