Method of inhibiting PAPR in OFDM system based on BA

A bat algorithm and bat technology, applied in transmission systems, multi-frequency code systems, digital transmission systems, etc., can solve problems such as implementation difficulties, unsatisfactory PAPR suppression effect, and low algorithm efficiency.
CN105681244AInactive Publication Date: 2016-06-15HEBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI UNIV OF TECH
Publication Date
2016-06-15
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention provides a method of inhibiting a PAPR (Peak-to-Average Power Ratio) in an OFDM (Orthogonal Frequency Division Multiplexing) system based on a BA (Bat Algorithm). The method comprises the steps of: first, in an OFDM system, the information source binary system bit stream of a transmitting terminal forming a plurality of paths of low speed data stream Dm through mapping and serial-parallel conversion, and the data stream Dm modulating signals to subcarriers through IFFT (Inverse Fast Fourier Transform) to obtain a signal IFFT (Dm); second, employing a BA to optimize the initial phase of the subcarriers generated in the first step; and third, employing the optimal phase factor theta m generated in the second step to optimize the signal IFFT (Dm) generated in the first step to obtain an optimized signal IFFT (Dm)*e<jo>m, performing parallel-serial conversion, adding cyclic prefix, and digital to analog conversion on the optimized signal to generate an OFDM signal, and sending the OFDM signal to a channel, thereby realizing high PAPR inhibition in the OFDM system.
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Description

technical field

[0001] The technical scheme of the invention relates to a multi-carrier transmission system of digital information, specifically a method for suppressing PAPR in an OFDM system based on bat algorithm. Background technique

[0002] Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM) technology is one of the multi-carrier transmission technologies. Due to its obvious advantages such as high spectrum utilization, effective resistance to inter-symbol interference, and anti-multipath fading, it has received extensive attention in recent years. . However, due to a series of defects in the OFDM technology, it faces many difficulties and challenges in application, one of which is a relatively high peak-to-average power ratio (Peak-to-Average Power Ratio, hereinafter referred to as PAPR), referred to as peak-to-average ratio. High PAPR will distort the transmission signal, degrade the performance of the entire system and affect the efficiency...

Claims

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