Low peak-to-average ratio orthogonal pulse modulation method based on Legendre polynomial

Abstract

The invention discloses a low peak-to-average ratio orthogonal pulse modulation method based on a Legendre polynomial. The method comprises: orthogonal pulses used for modulating data adopting elliptic spherical wave function pulses with the same channel bandwidth, mutually aliasing frequency spectrums and orthogonal time domains; wherein the elliptic spherical wave function pulse is generated byadopting a Legendre polynomial weighted combination; discretizing the orthogonal pulses to form an orthogonal basis matrix; constructing a dimension reduction matrix of the orthogonal basis matrix, wherein the row number of the dimension reduction matrix is smaller than the column number; carrying out left multiplication operation on the orthogonal basis matrix and the dimension reduction matrix to realize dimension reduction processing; data information to be transmitted being subjected to serial-parallel conversion to form a multi-path parallel data group, the multi-path parallel data groupand the orthogonal basis matrix subjected to dimension reduction processing being subjected to left multiplication operation, completing data modulation, and forming a path of modulation signal through time domain signal superposition. According to the method, the practicability of the ellipsoidal wave function in the quadrature modulation technology is improved, and meanwhile, the peak-to-averageratio of multiple paths of quadrature modulation signals is inhibited.

Description

technical field [0001] The invention relates to a wireless communication quadrature pulse modulation method, in particular to a Legendre polynomial-based low peak-to-average ratio quadrature pulse modulation method. Background technique [0002] The rapid development of mobile communication technology has broken the limitation of time and space, enabling people to quickly obtain or share various information data anytime and anywhere, which greatly improves people's quality of life. Compared with the fourth-generation mobile communication technology, the fifth-generation mobile communication technology has taken a big step forward, and its peak rate will be increased from 100Mbit / s to 10Gbit / s. How to realize high-speed information transmission, the key is to adopt modulation technology with high spectrum efficiency. Multi-channel orthogonal modulation technology is an important means to realize high-speed transmission in the fifth generation mobile communication. Typical m...

AI Technical Summary

Problems solved by technology

The existing peak-to-average ratio suppression methods, such as pre-distortion technology, coding technology, and signal scrambling technology, although they can suppress the peak-to-average ratio of modulated signals to a certain extent, they are all based on sacrificing the reliability or effectiveness of the system. costly

In particular, compared with the fourth-generation mobile communication technology, the fifth-generation mobile communication technology puts forward higher requirements in terms of low power, high speed, and multiple users, so that the existing peak-to-average ratio suppression method is It is difficult to achieve satisfactory results in the fifth generation mobile communication technology

Images