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A peak-to-average power ratio suppression method for multi-channel ellipsoidal wave pulse signals

An elliptical spherical wave, peak-to-average power ratio technology, applied in multi-frequency code systems and other directions, can solve the problems of destroying orthogonality and performance deterioration, and achieve the effect of reducing PAPR

Inactive Publication Date: 2015-08-26
王红星
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the non-sinusoidal time-domain quadrature modulation method, the orthogonality of the PSWF pulse group is mainly used to transmit information. Distorting the waveform will seriously destroy its orthogonality, resulting in a system bit error rate (Bit Error Ratio, BER) performance deterioration
For the PAPR suppression problem of multi-channel PSWF modulation signal, there is no relevant literature research

Method used

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  • A peak-to-average power ratio suppression method for multi-channel ellipsoidal wave pulse signals
  • A peak-to-average power ratio suppression method for multi-channel ellipsoidal wave pulse signals
  • A peak-to-average power ratio suppression method for multi-channel ellipsoidal wave pulse signals

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Embodiment

[0073] Design requirements: divide the design frequency band from 18.25GHz to 20.25GHz into two non-overlapping sub-bands, take two PSWF pulses on each sub-band, and perform PAPR suppression on these 4 PSWF pulses.

[0074] The specific implementation process is as follows:

[0075] ① Orthogonalization of 4 PSWF pulses

[0076] First calculate the cross-correlation matrix C of the 4 PSWF pulses to get:

[0077] C = 1 0 0.144 0 0 1 0 - 0.155 0.144 0 1 0 ...

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Abstract

The invention discloses a peak-to-average power ratio suppression method for multipath oval spherical wave pulse signals. The peak-to-average power ratio suppression method includes steps of firstly, orthogonalizing PSWF (prolate spheroidal wave function) pulse groups, on that basis, rotating and transforming the PSWF pulse groups by any angle theta by means of Givens rotation matrix G (I, j, theta) on a subplane defined by every two groups of pulses, and searching PSWF pulse group with minimum PAPR (peak-to-average power ratio). The method can effectively reduce the PAPR of the PSWF pulse groups on the premise of in-band energy aggregation and system error rate performance in the pulse groups, and CCDF (complementary cumulative distribution function) of PAPR of modulated signals before and after use of the method is shown by an attached map.

Description

technical field [0001] The invention relates to a peak-to-average power ratio suppression method for communication signals, in particular to a peak-to-average power ratio suppression method for ellipsoidal wave function (Prolate Spheroidal Wave Function, PSWF) pulse signals. Background technique [0002] In the patent "non-sinusoidal time-domain quadrature modulation method" (see patent: Wang Hongxing, Zhao Zhiyong, Liu Xiguo, Mao Zhongyang, Zhang Lei, Shu Genchun, non-sinusoidal time-domain quadrature modulation method, authorization number: ZL200810159238.3), make full use of PSWF pulse The high energy aggregation and orthogonality to transmit information can quickly improve the frequency band utilization of the system. However, this method uses multiple parallel PSWF pulses to load information, and its output signal is the superposition of multiple pulse signals. Compared with the single-channel transmission system, there is an excessive peak-to-average power ratio (PAPR)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 王红星陈昭男赵志勇刘锡国
Owner 王红星