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PTS method for reducing PAPR of OFDM system

A traditional, autocorrelation coefficient technology, applied in the transmission system, multi-frequency code system, electrical components, etc., can solve the problems of reducing system spectrum utilization rate and system PAPR increase, so as to improve spectrum utilization efficiency, reduce PAPR, and save bandwidth Effect

Inactive Publication Date: 2015-04-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

In order to accurately recover the sideband side information at the receiving end, additional techniques such as coding techniques are usually used to process the sideband side information, which may cause the system PAPR to increase again, and further reduce the system spectrum utilization rate

Method used

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  • PTS method for reducing PAPR of OFDM system
  • PTS method for reducing PAPR of OFDM system
  • PTS method for reducing PAPR of OFDM system

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Experimental program
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specific Embodiment approach

[0019] A typical OFDM signal can be represented as follows:

[0020] Among them, N is the number of subcarriers in the OFDM system, X(n) is the baseband modulated frequency domain data transmitted on the nth subcarrier, f n is the frequency of the nth subcarrier, and T is the period of one OFDM symbol.

[0021] The PAPR of a signal is defined as the ratio of the instantaneous peak power to the average power of the signal:

[0022] PAPR = max { | x ( t ) | 2 } E { | x ( t ) | ...

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Abstract

The invention belongs to the technical field of wireless communication, and particularly relates to a PTS method for reducing the PAPR of an OFDM system. After an OFDA signal is partitioned, autocorrelation with different autocorrelation coefficients is respectively added according to the plus or minus characteristic of a first data point real part of each piece, so that the aims that the PAPR of the OFDM signal is reduced and a receiving end detects the signal without sideband auxiliary information are achieved. The receiving end recovers a correlation coefficient according to the plus and minus characteristic of an autocorrelation value of each piece, a piece signal without autocorrelation and the autocorrelation coefficient corresponding to the piece signal are multiplied, and the phase rotation sequence timing the piece is judged according to the plus and minus characteristic of a product. The receiving end can recover an original signal without the sideband auxiliary information while the PAPR of the OFDM signal is effectively reduced through the self-correlation matching-PTS, so that band width is saved, and frequency spectrum utilization efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a PTS method for reducing PAPR of an OFDM system. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing, OFDM) is a multi-carrier modulation technology with superior performance, which has been widely valued because it can effectively combat inter-symbol interference (Inter-symbol Interference, ISI) and multipath delay. There are multiple orthogonal sub-carriers in the OFDM system, and its output signal is the superposition of multiple sub-signals, so there will be a high peak-to-average power ratio (Peak-to-average Power Ratio, PAPR). High PAPR will cause out-of-band power radiation, hardware nonlinear distortion, and mutual interference between subcarriers, etc., which will seriously deteriorate system performance. Therefore, it is of great significance to reduce the PAPR of the OFDM system. [0003] At present, the methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10H04L27/26
Inventor 贾莹莹杨霖王田胡武君李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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