An Adaptive Adjustment Method for Reducing the 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 poor consideration of computational complexity, waste of system resources, and inability to guarantee signal power conditions, etc., to achieve improved bit error rate (BER) performance, The effect of saving system resources and reducing computational complexity

Active Publication Date: 2021-06-08
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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  • An Adaptive Adjustment Method for Reducing the Signal Peak-to-Average Ratio
  • An Adaptive Adjustment Method for Reducing the Signal Peak-to-Average Ratio
  • An Adaptive Adjustment Method for Reducing the 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 an adaptive adjustment method for reducing the peak-to-average ratio of a signal, which belongs to the technical field of communication. Ensure that all signal powers are within the dynamic linear range of the device, improving the bit error rate performance of the OFDM system; introducing the idea of ​​self-adaptation, by setting the PAPR threshold value requirements, for signals smaller than the threshold value, no processing is performed ; For the signal larger than the threshold value, combined with experience and relevant derivation, the processing parameters V and W are initially given; for different transmission signals, different processing parameters are given, which saves system resources and reduces the time for signal processing. . The invention sets the adjustment rules for the number of blocks V and the search space W for the signal that still does not meet the power threshold value under the initial given processing parameters, and reduces the computational complexity under the premise of ensuring the PAPR performance.

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 Patents(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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