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Improved SLM-PTS peak average power ratio suppression method

A peak-to-average ratio suppression and algorithm technology, applied in modulation carrier systems, digital transmission systems, electrical components, etc., can solve problems such as large computational complexity, and achieve the effects of improving overall performance, preventing signal distortion, and improving PAPR suppression capability.

Pending Publication Date: 2021-09-03
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

However, the larger the number of candidate signals and the number of sub-blocks, the greater the computational complexity

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  • Improved SLM-PTS peak average power ratio suppression method
  • Improved SLM-PTS peak average power ratio suppression method
  • Improved SLM-PTS peak average power ratio suppression method

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Embodiment Construction

[0037] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0038] Such as figure 1 An improved SLM-PTS peak-to-average ratio suppression method shown specifically includes the following steps:

[0039] S1: Improve the traditional SLM algorithm to obtain the lSLM-μlaw algorithm.

[0040] attached figure 1The principle block diagram of the lSLM-μlaw algorithm is firstly copied into M groups of input signal sequences in the frequency domain, and multiplied by M phase rotation factors respectively to generate M groups of candidate signals. Then IFFT transforms the M groups of candidate signals respectively to generate M groups of time-domain signals, and then divides the M groups of time-domain signals into two groups on average, and arbitrarily perfo...

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Abstract

The invention discloses an improved SLM-PTS peak average power ratio (PAPR) suppression method, which comprises the following steps: generating an lSLM-algorithm: copying an input signal sequence into M groups in a frequency domain, respectively multiplying the M groups by M phase rotation factors, averagely dividing M groups of time domain signals into two groups, and randomly carrying out linear combination on the two groups of signals to generate M2 / 4 groups of standby signals; generating a WHT-IPTS algorithm: firstly performing digital mapping on an input signal to generate N pieces of mapped data, inputting the mapped data into a precoder and multiplying the mapped data by a WHT matrix so as to obtain coded frequency domain data, dividing the frequency domain data into V sub-blocks, and finding out a phase factor combination with the lowest PAPR value by using a suboptimal iterative search method; and obtaining an ISLM-[mu]law-WHT-IPTS algorithm, and using the ISLM-[mu]law-WHT-IPTS algorithm to carry out PAPR value suppression on a signal in an OFDM system.

Description

technical field [0001] The invention relates to the field of data signal processing, in particular to an improved SLM-PTS peak-to-average ratio suppression method. Background technique [0002] The basic idea of ​​OFDM is to convert a high-rate serial data stream into multiple low-rate parallel sub-data streams through a serial-to-parallel (S / P) conversion operation, and then modulate them onto multiple orthogonal sub-carriers for parallel transmission. . This parallel transmission system greatly expands the pulse width of symbols and improves the performance against harsh transmission conditions such as multipath fading. The OFDM system signal is composed of multiple subcarrier signals superimposed, which makes the output of the OFDM system prone to a large peak-to-average power ratio (PeakAverage Power Ratio, PAPR), which is also the most troublesome problem in the OFDM system. The peak-to-average ratio in the OFDM system is relatively high, so that when the signal passe...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2617
Inventor 索继东于易可黄雪滢柳晓鸣陈晓楠
Owner DALIAN MARITIME UNIVERSITY
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