Method for inhibiting high peak-to-average power ratio of FBMC-OQAM system

A technology of average ratio and peak-to-average value, which is applied in the field of peak-to-average ratio suppression of filter bank multi-carrier-offset quadrature amplitude modulation system, to achieve the effect of improving performance, improving suppression performance, and expanding the search range

Inactive Publication Date: 2018-04-13
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

In the OFDM system, the solution to reduce the PAPR is quite mature, and has a negligible bit error rate (bit error ratio, BER) degradation. The prior art has outlined different solutions to suppress the PAPR of the OFDM system, but due to the inherent There are relatively few methods for reducing the PAPR of FBMC-OQAM systems, and some techniques used in FBMC systems usually require additional processing and complexity to solve the problem

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  • Method for inhibiting high peak-to-average power ratio of FBMC-OQAM system
  • Method for inhibiting high peak-to-average power ratio of FBMC-OQAM system
  • Method for inhibiting high peak-to-average power ratio of FBMC-OQAM system

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Embodiment Construction

[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] The model of the present invention, such as figure 2 As shown, the signal is first modulated by OQAM and mapped to signal A m , A m =[a 0,m ,a 2,m ,...,a N-1,m ], a m,n is the signal on the nth subcarrier of the mth data block, and N represents the number of subcarriers. After serial-to-parallel conversion, the real part and imaginary part of the signal are transmitted separately on the subcarrier, and then through the prototype filter and phase modulation, the subcarrier signal is superimposed to obtain the transmitted FBMC-OQAM data block, and the symbol block in the FBMC-OQAM system The mathematical description is:

[0025]

[0026] and The real and imaginary parts of the signal, h(t) represents the prototype filter of length βN, β is the overlap coefficient, n represents the subcarrier index, h(t) moves in time and...

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Abstract

The invention relates to the technical field of wireless communication, and particularly relates to a method for inhibiting a high peak-to-average power ratio of an FBMC-OQAM system. The method comprises the following steps: searching a phase factor of a first section in D sections; calculating optimal phase factor vectors of inner layers of all data blocks; searching phase factor vectors of outerlayers; and multiplying the obtained phase factor vectors of inner layers with the phase factor vectors of outer layers at corresponding positions to obtain the finally necessary optimal phase factorvector. According to the method, the phase factors are divided into odd and even vectors to iterate separately, thereby enlarging the search range and seeking the optimal solution, then in combination with the FBMC-OQAM system, the overlapped parts of the data blocks are used, so that the phase factor vector with the minimum PARP of the sum of a weighted signal of the current symbol block and thesignal in a register window is used as the optimal phase factor vector, then the performance of the PAPR is inhibited without increasing the calculation amount.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to filter bank multi-carrier / offset quadrature amplitude modulation (filter bank multi-carrier / offset quadrature amplitude modulation, FBMC-OQAM) system peak-to-average ratio (Peak to Average Power Ratio, PAPR ) suppression method. Background technique [0002] In recent years, multi-carrier technology (filter bank multi-carrier, FBMC) has been widely used in communication systems for high-speed data transmission, and is considered as a candidate modulation scheme for future wireless communication. Among them, the orthogonal frequency division multiplexing (OFDM) technology is one of the most famous multi-carrier schemes, but the cyclic prefix (CP) reduces the spectral efficiency of the system, and the rectangular pulse shaping leads to serious high out-of-band radiation. In order to eliminate these effects, filter bank multi-carrier-offset quadrature amplit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L27/34
CPCH04L27/2621H04L27/264H04L27/3411
Inventor 唐宏李若梦唐青青杨浩澜
Owner CHONGQING UNIV OF POSTS & TELECOMM
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