Self-adaptive adjustment method for reducing signal peak-to-average ratio

An adaptive adjustment and signal peak-to-average ratio technology, applied in the field of communication, can solve problems such as waste of system resources, inability to guarantee signal power conditions, and poor consideration of computational complexity, so as to save system resources, reduce computational complexity, Effect of improving bit error rate (BER) performance

Active Publication Date: 2020-09-01
YANSHAN UNIV
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Problems solved by technology

However, as a probabilistic method, it cannot guarantee that every signal satisfies the power condition
In addition, for different transmission signals, the given processing parameters are fixed, which wastes a certain amount of system resources, and does not consider well the computational complexity.

Method used

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  • Self-adaptive adjustment method for reducing signal peak-to-average ratio

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Embodiment Construction

[0064] The present invention aims at the problem that the peak average power of the OFDM system is relatively high, and develops a peak-to-average ratio suppression technology for Orthogonal Frequency Division Multiplexing (OFDM) technology in an industrial reliable communication scenario, a method to reduce OFDM peak-to-average power The adaptive partial transmission sequence method of the ratio, specifically an adaptive adjustment method for reducing the peak-to-average ratio of the signal.

[0065] Below in conjunction with embodiment the present invention is described in further detail:

[0066] An adaptive adjustment method for reducing the signal peak-to-average ratio, comprising the following steps:

[0067] (1) Perform serial-to-parallel conversion and IFFT processing on the data stream to obtain a time-domain signal;

[0068] In order to recover the time-domain signal better, here for N modulation symbols X=[X 0 ,X 1 ,...,X N-1 ] T Using oversampling processing, ...

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Abstract

The invention discloses a self-adaptive adjustment method for reducing a signal peak-to-average power ratio, and belongs to the technical field of communication. According to the invention, a power threshold value P0 is comprehensively set according to the working ranges of a power amplifier, an A / D converter, a D / A converter and other devices, it is ensured that all signal power is within the dynamic linear range of the devices and the bit error rate performance of an OFDM system is improved. A self-adaptive idea is introduced, and signals smaller than a threshold value are not processed by setting a PAPR threshold value requirement; processing parameters V and W are preliminarily given for signals larger than a threshold value in combination with experience and related derivation; for different transmission signals, different processing parameters are given, so system resources are saved, and the signal processing time is shortened. According to the method, the adjustment rules of the block number V and the search space W are set for the signals which still do not meet the power threshold value under the condition that the processing parameters are initially given, and the calculation complexity is reduced on the premise that the PAPR performance is guaranteed.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an adaptive adjustment method for reducing the signal peak-to-average ratio. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is widely used in wired and wireless communication systems due to its high transmission rate, strong anti-interference ability, high spectrum utilization rate, and easy combination with other access methods. However, a major problem of OFDM technology is the high peak-to-average power ratio (PAPR). Larger PAPR requires the A / D, D / A, power amplifier and other devices in the system to have a large linear range. The OFDM signal with a relatively large peak-to-average ratio can easily enter the nonlinear region of the power amplifier, resulting in nonlinear distortion of the signal. Seriously degrade the performance of the entire system. [0003] The fifth-generation mobile communication technology (5G) is curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2614H04L27/2621
Inventor 袁亚洲魏世威关新平罗小元杨博陈彩莲
Owner YANSHAN UNIV
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