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Method for lowering peak-to-average power ratio of universal filtering multicarrier signals

A peak average power, multi-carrier signal technology, applied in the modulation carrier system, multi-frequency code system, digital transmission system and other directions, can solve the problem of long filter length, can not be independent of each other and so on

Active Publication Date: 2016-10-26
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

The length of the filter may be longer than a UFMC symbol, resulting in that two or more adjacent symbols cannot be independent of each other

Method used

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  • Method for lowering peak-to-average power ratio of universal filtering multicarrier signals
  • Method for lowering peak-to-average power ratio of universal filtering multicarrier signals
  • Method for lowering peak-to-average power ratio of universal filtering multicarrier signals

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Embodiment Construction

[0102] S010. Build a model

[0103] combine figure 1 , set the number of sub-bands of the system to be B, and the number of sub-carriers of the i-th sub-band to be M i , filter h i . The subbands are inverse discrete Fourier transform (IDFT) at N points, and passed through the Chebyshev filter h i After accumulation, the frequency domain signal S i Do N-point Inverse Discrete Fourier Transform (IDFT) to get the time-domain signal s i . The transmitted time domain signal is obtained under the assumption that the parameters of the filter settings of each subband are the same:

[0104]

[0105] Among them, L is the length of each subband filter, l and n represent the time symbol subscript respectively, s i is the time domain signal S i (m) is the mth subcarrier of the ith subband,

[0106] S020. Assume that the input data S of the general-purpose filter multi-carrier system i (m) is the bit stream of independent random variables. After digital modulation with equ...

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Abstract

The invention relates to a method for lowering the peak-to-average power ratio of universal filtering multicarrier signals. The method comprises the following steps of: (1) establishing a system model; (2) setting that the sampling points are mutually independent and identical in distribution, and utilizing numerical calculation to analyze the system model; (3) theoretically analyzing a high peak-to-average power ratio (PAPR) of universal filtering multicarriers (UFMC), and obtaining a complementary cumulative distribution function (CCDF); (4) analyzing system parameters of the universal filtering multicarriers (UFMC); (5) utilizing a Largrange method to obtain an optimal solution of the complementary cumulative distribution function; and (6) establishing the relation between filter parameters and the complementary cumulative distribution function (CCDF). According to the invention, the relation between the UFMC peak-to-average power ratio statistic characteristics and the filter coefficients is analyzed, a Largrange optimization method is utilized to obtain the CCDF optimal solution of the UFMC and the expressions of theoretical relations of the filter parameters, the design of a filtering multicarrier system is guided, and the peak-to-average power ratio is further lowered.

Description

technical field [0001] The invention relates to the technical field of wireless mobile communication, in particular to a method for reducing the peak-to-average power ratio of general-purpose filtering multi-carrier signals. Background technique [0002] The fifth-generation mobile communication technology will provide high-speed, safe and free communication between people, people and things, and things and things. The 5G mobile communication system will put forward higher requirements in terms of transmission quality and system capacity requirements. The transmission rate can reach 10GB / s; the spectral efficiency is increased by more than 10 times based on 4G by introducing new wireless transmission technology; the service delay is less than 5ms; the network capacity is increased by 1000 times. [0003] IoT technology is to connect the sensor / actuator of the device with the network and require the battery of the device to not need to be replaced for 10-15 years. This make...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2614H04L27/2618
Inventor 王蓉程安宇余翔郑寒冰
Owner CHONGQING UNIV OF POSTS & TELECOMM
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