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Partial transmission sequence peak-to-average ratio suppression method based on precoding

A peak-to-average ratio suppression, partial transmission technology, applied in transmission systems, digital transmission systems, multi-frequency code systems, etc., can solve problems such as being unsuitable for OFDM communication systems and the amount of calculation is huge, and achieve a peak-to-average ratio performance value. requirements and overcome the effect of insufficient reduction of peak-to-average ratio

Inactive Publication Date: 2019-10-18
HARBIN ENG UNIV
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Problems solved by technology

[0007] Theoretically, b v The value of can be chosen between [0,2π) to obtain the best performance of PAPR suppression, but when the number of phase values ​​W contained in the set is large, b v Total W V possible values, each symbol requires V·W V The weighting coefficients can only be finally determined after the second IFFT, which is too computationally intensive and not suitable for the application of OFDM communication systems

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  • Partial transmission sequence peak-to-average ratio suppression method based on precoding
  • Partial transmission sequence peak-to-average ratio suppression method based on precoding
  • Partial transmission sequence peak-to-average ratio suppression method based on precoding

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[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0038] The invention belongs to the field of wireless communication, and in particular relates to a method for suppressing the peak-to-average ratio of a partial transmission sequence based on precoding.

[0039] The object of the present invention is to propose a peak-to-average ratio suppression algorithm for partial transmission sequences based on precoding.

[0040] The object of the present invention is achieved in the following way: firstly serial-to-parallel conversion is performed on the serial data to be processed at the OFDM transmitting end, and the obtained parallel data is transformed into digital mapping data by a digital mapping module. Transform by using Walsh-Hadamard Transform (WHT, Walsh-Hadamard Transform) matrix, encode the digital mapping data, perform PTS operation on the encoded data, and finally obtain the signal sequence ...

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Abstract

The invention belongs to the field of wireless communication, provides a partial transmission sequence peak-to-average ratio inhibition method based on precoding, and aims at solving the problem thatthe inhibition degree of a traditional partial transmission sequence on the peak-to-average ratio is not enough, a coding method is applied to a partial transmission sequence method, and Walsh-Hadamard matrix is used for pre-coding the data after the digital mapping module. As Walsh-Hadamard matrix can reduce the autocorrelation of frequency domain signals, thus the peak-to-average ratio of the system can be reduced. Compared with a traditional peak-to-average ratio suppression algorithm, the improved partial transmission sequence peak-to-average ratio suppression algorithm has better performance.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a method for suppressing the peak-to-average ratio of a partial transmission sequence based on precoding. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiple) technology is widely used in the fourth generation mobile communication (4G, The Fourth Generation) systems are widely used and formulated in multiple standards, such as Long Term Evolution (LTE, Long Term Evolution) of 3GPP. At the same time, in the 5G communication system, OFDM technology will still be indispensable. One of the main disadvantages of the OFDM system is that the ratio of signal peak power to average power (PAPR, Peak-to-average Power Ratio) is too high. Here the PAPR formula is expressed as: where x n Indicates the output signal obtained after the IFFT operation, max{·} represents the maximum value, and E{·} represents ...

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2615
Inventor 刘鲁涛孙乾乾禹永植郭立民
Owner HARBIN ENG UNIV
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