Method, device and system for suppressing peak-to-average power ratio of orthogonal frequency division multiplexing signal
A technology of peak-to-average power ratio and multiplexing signals, applied in the field of communication, can solve the problems of increasing bit error rate, signal distortion, and affecting signal transmission quality of signal transmission system, so as to reduce the bit error rate, reduce the probability of distortion, The effect of improving the quality of signal transmission
Active Publication Date: 2021-04-16
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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However, due to the superposition of multiple sub-carrier signals, when the initial phases of the sub-carrier signals are the same or similar, the peak power of the OFDM signal will be much greater than its average power value, that is, the OFDM signal peak-to-average power ratio (Peak-to-Average Power Ratio, PAPR) is too large
Excessive signal peak-to-average power ratio will cause out-of-band radiation and in-band distortion, resulting in signal distortion, which will lead to an increase in the bit error rate of the signal transmission system and affect the quality of signal transmission
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[0047] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.
[0048] see figure 1 , the application provides a method for suppressing the peak-to-average power ratio of an OFDM signal, and the method for suppressing the peak-to-average power ratio of an OFDM signal includes the following steps:
[0049] S10: Obtain a noise signal and generate a cyclic prefix according to the noise signal;
[0050] S20: inserting a cyclic prefix into a subcarrier signal to generate a carrier signal;
[0051] S30: Calculate the peak-to-average power ratio of the carrier signal to determine the output s...
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The invention discloses a method for suppressing a peak-to-average power ratio of an orthogonal frequency division multiplexing signal. The method comprises the following steps: acquiring a noise signal and generating a cyclic prefix according to the noise signal; inserting the cyclic prefix into the subcarrier signal to generate a carrier signal; and calculating a peak-to-average power ratio of the carrier signal to determine an output signal. According to the method for suppressing the peak-to-average power ratio of the orthogonal frequency division multiplexing signal, the cyclic prefixes generated by the noise signals are inserted into the sub-carrier signals, so that the probability that the initial phases of the multiple paths of sub-carrier signals are the same or similar can be reduced, and the peak-to-average power ratio of the carrier signals is suppressed; the output signal is determined according to the peak-to-average power ratio of the carrier signal, the distortion probability of the output signal can be reduced, the bit error rate of a signal transmission system is reduced, and the signal transmission quality is improved. The invention further discloses a device and a system for suppressing the peak-to-average power ratio of the orthogonal frequency division multiplexing signal, computer equipment and a readable storage medium.
Description
technical field [0001] The present application relates to the field of communication technology, and in particular to a method, device, system, computer equipment and readable storage medium for suppressing the peak-to-average power ratio of an OFDM signal. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is widely used in various communication scenarios due to its high spectral efficiency and excellent anti-multipath ability, such as 4G wireless communication systems, power line carrier communication, Wireless LAN, etc. However, due to the superposition of multiple sub-carrier signals, when the initial phases of the sub-carrier signals are the same or similar, the peak power of the OFDM signal will be much greater than its average power value, that is, the OFDM signal peak-to-average power ratio (Peak-to-Average Power Ratio, PAPR) is too large. Excessive signal peak-to-average power ratio will cause out-of-band radiation and in-ba...
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IPC IPC(8): H04L27/26
CPCY02D30/70
Inventor 宋章启闫良俊黄可钦陈宇涛杨洋朱肖彤陈旭泽
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA