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The method of reducing peak-to-average ratio based on pts algorithm in ofdm system

A peak-to-average ratio and algorithm technology, which is applied in the field of reducing the peak-to-average power ratio of signals based on the partial sequence transmission PTS algorithm, can solve the problems of insufficient reduction of the peak-to-average ratio, high complexity, and high computational complexity, and achieve the goal of overcoming the peak-to-average power ratio. The ratio reduction is not large enough to meet the requirements of the peak-to-average ratio performance value, and the system realizes the effect of low complexity

Active Publication Date: 2019-10-25
XIDIAN UNIV
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Problems solved by technology

The shortcomings of this method are: due to the addition of autocorrelation coefficient discriminators and autocorrelation signal generators, the complexity of the method is high, which increases the complexity of the entire OFDM system
The shortcomings of this method are: first, the computational complexity of this method is too high; second, the reduction of the peak-to-average ratio of this method is not large enough to meet the peak-to-average ratio performance of most mobile user terminal equipment. requirements

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  • The method of reducing peak-to-average ratio based on pts algorithm in ofdm system
  • The method of reducing peak-to-average ratio based on pts algorithm in ofdm system
  • The method of reducing peak-to-average ratio based on pts algorithm in ofdm system

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[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] Refer to attached figure 1 , to further describe the implementation method of the present invention.

[0039] Step 1, input the signal to be processed.

[0040] The electrical signal to be processed is input to the transmitting end of the OFDM system.

[0041] Step 2, signal encoding.

[0042] Source coding and channel coding are performed on the input electrical signal through a source coder and a channel coder respectively to obtain a binary bit stream.

[0043] The parameters of the source coder and the channel coder are determined by the parameters of the OFDM system.

[0044]Step 3, the binary bit stream is digitally modulated.

[0045] Using a digital modulator, the binary bit stream is digitally modulated to obtain the serial signal sequence of the Orthogonal Frequency Division Multiplexing OFDM system.

[0046] The parameters of the digital modulat...

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Abstract

The invention discloses a method for reducing a peak-to-average ratio (PAR) based on a PTS algorithm in an OFDM system. A problem that the signal PAR in the orthogonal frequency-division multiplexing (OFDM) system is overtop in the prior art is mainly solved. Specific steps are as follows: (1) inputting a to-be-processed signal; (2) encoding the signal; (3) performing digital modulation on a binary bit stream; (4) performing serial-to-parallel conversion on a serial signal; (5) segmenting a parallel signal sequence; (6) performing inverse Fourier transformation on V sub-sequences; (7) grouping V time domain sub-sequences; (8) acquiring M time domain optimal sub-sequences; (9) acquiring the time domain optimal sequence; and (10) sending the time domain optimal sequence. The method disclosed by the invention has the advantages that the system implementation complexity is low and the reduction amplitude of the PAR is great, the power use ratio of a communication system transmitter is improved, and a requirement on the PAR performance value by mobile user terminal equipment can be satisfied.

Description

technical field [0001] The present invention belongs to the technical field of communication, and further relates to an OFDM (orthogonal frequency division multiplexing) system in the technical field of wireless communication, which reduces the signal peak-to-average power ratio based on a partial sequence transmission PTS (partial transmit sequence) algorithm. (PAPR, Peak to Average Power Ratio, peak-to-average ratio for short) method can be used to reduce the peak-to-average ratio of the OFDM system. Background technique [0002] Orthogonal frequency division multiplexing system has the advantages of anti-multipath fading, high spectrum utilization rate and large system capacity, so it has been widely used in wireless communication systems, including terrestrial digital video broadcasting DVB-T (digital videobroadcasting-terrestrial) , DAB (digital audio broadcasting), WLAN (wireless local area network), WiMAX (worldwide interoperability for microwave access) and other fie...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2615H04L27/2617H04L27/2627
Inventor 田斌王婷易克初
Owner XIDIAN UNIV
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