Peak power optimization method of ofdm system based on arnold transform

Abstract

This disclosure provides an OFDM system peak power optimization method based on Arnold transform, which divides the original input binary data sequence into multiple sub-block sequences and adds augmented sequences, arranges each sub-block sequence into a square matrix, and pairs Each square matrix is ​​subjected to Arnold transformation, and then each square matrix is ​​rearranged into a candidate sub-block sequence, and each candidate sub-block sequence is recombined into a data sequence, and each recombined data sequence is subjected to phase-shift keying mapping to obtain the corresponding frequency Domain data sequence, the frequency domain data sequence is subjected to Arnold transformation again according to the above method to obtain the recombined frequency domain data sequence, and each frequency domain data sequence is subjected to IFFT transformation respectively to obtain the corresponding candidate signal and calculate its PAPR value, from all Among the candidate signals, the candidate signal with the smallest PAPR value is selected for transmission; the disclosure obtains a bit error rate similar to that of the original OFDM system without sending side information.

Description

technical field [0001] The present disclosure relates to the technical field of digital communication, in particular to an OFDM system peak power optimization method based on Arnold transform. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation technology that can divide high-speed serial data signals into multiple parallel low-speed sub-channels. Then on each low-speed parallel sub-channel, different modulation techniques are used to modulate data to different orthogonal sub-carriers to realize parallel transmission of sub-data streams. Because OFDM has the ability to resist multipath fading and the ability to adapt to channel changes, this technology can be widely used in various digital transmission and communication systems, such as high bit rate digital sub...

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Problems solved by technology

[0015] The inventors of the present disclosure found that although the probabilistic technology has the best PAPR reduction performance, it also has its disadvantages: although it probabilistically reduces the PAPR of the system by rotating the data sequence at the transmitting end, it does not at the receiving end It is not known how the phase rotation of the data sequence has occurred, so it is necessary to send side information along with the signal to help the receiver demodulate the received signal

After the side information is interfered by wireless channel noise, it is often recovered by error at the receiving end, resulting in wrong demodulation of the signal at the receiving end, resulting in serious distortion of the system

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