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A PAPR Reduction Method Based on Signal Restoration in f-ofdm System

A F-OFDM and signal technology, applied in the field of reducing PAPR based on signal restoration, can solve the problem that the signal error rate does not increase, and achieve the effect of reducing PAPR and increasing the bit error rate

Inactive Publication Date: 2020-11-24
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

At the same time, through the simulation experiment, the bit error rate of the restored signal has not improved

Method used

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  • A PAPR Reduction Method Based on Signal Restoration in f-ofdm System
  • A PAPR Reduction Method Based on Signal Restoration in f-ofdm System
  • A PAPR Reduction Method Based on Signal Restoration in f-ofdm System

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Embodiment Construction

[0033] Table 2 Simulation parameters

[0034]

[0035]

[0036] The specific implementation method of the technical solution of the present invention under the setting of table 2 is provided below, and the specific process of the method comprises the following steps:

[0037]Step 1, input the binary data bit stream, baseband modulation to obtain the mapping signal, after serial-to-parallel conversion and inverse fast Fourier transform, a time-domain OFDM signal sequence x with a length of 1024 is obtained;

[0038] Step 2. Determine that the missing parameter is 3, calculate the amplitude of each position of the time-domain signal sequence x, remove the 3 highest amplitude signals in x, obtain the peak-removing signal, record the missing position of the signal, and send it to the transmitting antenna together after filtering;

[0039] Step 3. Filter the received peak-removing signal and remove the cyclic prefix to obtain the time-domain signal x R , fill in the position...

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Abstract

The invention discloses a PAPR (Peak to Average Power Ratio) reduction method based on signal restoration in an F-OFDM (Filtered Orthogonal Frequency Division Multiplexing) system. No signal with thehighest power is transmitted at a transmitter, and an unsent signal restored by an algorithm is restored at a receiver by constructing sub-blocks. The method can be used together with other PAPR reduction methods at the transmitter to achieve a better PAPR suppression effect. Meanwhile, simulation experiments show that the bit error rate of the restored signal is not increased.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for reducing PAPR based on signal restoration in an F-OFDM system. Background technique [0002] F-OFDM is the 5G air interface technology mainly promoted by Huawei. Because this technology is derived from OFDM technology, it has the problem of high peak-to-average power ratio (PAPR). High PAPR will cause nonlinear distortion to occur when the signal passes through nonlinear equipment, such as a high power amplifier. In order to solve the high PAPR problem of F-OFDM signal, the technique of reducing PAPR in OFDM system can be used, such as the literature "H.Ochiai and H. Imai, "Performance of the deliberate clipping with adaptive symbol selection for strictly band-limited OFDM systems," IEEEJ. Sel. Areas Commun., vol.18, no.11, pp.2270–2277, Nov.2000." is a Waveform clipping technology, but there is a problem of signal distortion, such as the literature "Cho Y J, Kim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2614H04L27/2628H04L27/265
Inventor 罗仁泽黄雪霁赵万明王瑞杰刘志平
Owner SOUTHWEST PETROLEUM UNIV
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