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A Method for Realizing a Filter Bank Multi-Carrier Transmitter

A technology of filter bank and implementation method, which is applied in the direction of modulated carrier system, multi-frequency code system, digital transmission system, etc., can solve the problem of high computational complexity, and achieve the effect of reducing computational complexity and suppressing PAPR

Active Publication Date: 2021-03-16
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

The phase factor used in this algorithm is the traditional phase factor. The real part data and imaginary part data of the FBMC signal correspond to an optimal phase rotation factor vector respectively. Although the PAPR of the signal is reduced, the computational complexity is relatively high.

Method used

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  • A Method for Realizing a Filter Bank Multi-Carrier Transmitter
  • A Method for Realizing a Filter Bank Multi-Carrier Transmitter
  • A Method for Realizing a Filter Bank Multi-Carrier Transmitter

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Embodiment Construction

[0060] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0061] The present invention mainly solves the problem that the FBMC waveform has a higher PAPR, and the method includes: the transmitted data stream is modulated by OQAM; the modulated data stream is grouped into data blocks, and each group of data is evenly divided into two parts according to the order of the subcarriers, Multiply different phase factors respectively, and the phase satisfies the α-fold relationship; perform optimal phase search to determine the optimal phase factor for each group, and consider the influence of the first m-1 symbols when optimizing the m-th symbol; each group optimizes The last data blocks are input to the PPN and added. The present invention combines the PPN structure and the partial transmission sequence (Improved Partial Transmission Sequence, Improved-PTS) algorithm of the new phase factor and the part...

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Abstract

The invention relates to a Filter Bank Multi-Carrier (FBMC) transmitter implementation method, and belongs to the technical field of wireless communication. The method comprises the steps of: S1: carrying out Offset Quadrature Amplitude Modulation (OQAM) modulation on sent data streaming, then carrying out data block grouping on the modulated data streaming, and respectively carrying out IFFT; S2:designing a Peak to Average Power Ratio (PAPR) suppression module, implementing optimal phase searching, and after obtaining an optimal phase factor, respectively multiplying by each group of data blocks after IFFT; S3: designing a Poly-Phase filtering Network (PPN) module, and after inputting each group of optimized data blocks into a PPN, carrying out adding; and S4: adding two paths of I / Q delays and generating a FBMC signal. According to the invention, calculation complexity of an FBMC transmitter can be reduced, and an FBMC waveform with a low PAPR is obtained.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a method for realizing a low PAPR FBMC transmitter. Background technique [0002] As one of the 5G candidate waveforms, FBMC technology can meet the overall needs of future mobile communications. FBMC is based on subcarrier filtering, and the subcarriers do not need to be strictly orthogonal. The subcarrier spacing can be set flexibly, which makes it feasible to effectively utilize scattered spectrum resources. In order to avoid interference between FBMC subcarriers and large spectrum leakage, the FBMC baseband adopts OQAM modulation and separate filtering for each subcarrier, but at the same time increases the complexity of the transceiver system, so how to reduce the complexity of the FBMC system has become one of the research hotspots . Another widely discussed topic in the waveform research process is PAPR performance. Low PAPR can improve the working efficiency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2602H04L27/2614H04L27/264
Inventor 龙恳程志安余翔段思睿
Owner CHONGQING UNIV OF POSTS & TELECOMM
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