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Threshold value classification SLM method and system for reduction of OFDM system peak-to-average power ratio

A peak-to-average power ratio and threshold classification technology, which is applied in the transmission system, multi-frequency code system, digital transmission system, etc., can solve the problems of increasing difficulty and the computational complexity of the selective mapping method, and achieve the reduction of computational complexity, The effect of improving performance

Active Publication Date: 2019-01-11
UNIV OF JINAN
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Problems solved by technology

[0015] Furthermore, since the computational complexity required by the selective mapping method is very large, it increases the difficulty of implementing the method in reality, forcing us to improve the technology to solve such problems

Method used

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  • Threshold value classification SLM method and system for reduction of OFDM system peak-to-average power ratio
  • Threshold value classification SLM method and system for reduction of OFDM system peak-to-average power ratio
  • Threshold value classification SLM method and system for reduction of OFDM system peak-to-average power ratio

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Embodiment 1

[0045] A threshold classification SLM method for reducing the peak-to-average power ratio of an OFDM system disclosed in one or more embodiments, figure 1 The technical principle block diagram of the transmitter is given, and the specific implementation steps are as follows:

[0046] (1) First, encode and map the input original binary signal data and then copy it into a U channel, and divide the U channel binary signal data into two groups. The raw binary signal data here represents raw binary signal data to be transmitted.

[0047] (2) Then use the phase factor set P 1 ={±j} and P 2 = {±1} generate two different phase factor rotation sequence groups respectively; select two phase factor sets P 1 ={±j} and P 2 ={±1}, and use P 1 and P 2 Generate U / 2 phase factor rotation sequence groups whose length is equal to the number of subcarriers of the OFDM system, each phase factor rotation sequence group contains U / 2 phase factor rotation sequences, and each phase factor rotati...

Embodiment 2

[0070] A threshold classification SLM system for reducing the peak-to-average power ratio of an OFDM system disclosed in one or more embodiments includes a server, and the server includes a memory, a processor, and a computer stored on the memory and operable on the processor A program, when the processor executes the program, implements the threshold classification SLM method for reducing the peak-to-average power ratio of an OFDM system described in Embodiment 1.

Embodiment 3

[0072] A computer-readable storage medium disclosed in one or more embodiments, on which a computer program is stored, and when the program is executed by a processor, the threshold classification for reducing the peak-to-average power ratio of an OFDM system described in Embodiment 1 is performed SLM method.

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Abstract

The present invention discloses a threshold value classification SLM method and system for reduction of an OFDM (orthogonal frequency division multiplexing) system peak-to-average power ratio (PAPR).The method comprises the steps of: generating a phase factor rotation sequence by employing two sets of different phase factor sets, performing weighted processing for a binary sequence after mappingand then performing inverse fast Fourier transform to generate two sets of original alternate signal sequences, performing sentence processing of the two sets of the original alternate signal sequences, adding the signal sequence with PAPR values in the two sets being larger than a threshold value and the signal sequence with the PAPR values in different sets being larger than the threshold valueand performing normalization processing to generate a new set of alternate signal sequence; and finally, selecting an alternate signal sequence with the minimum PAPR from the three sets of the alternate signal sequences for transmission. The threshold value classification SLM method and system for reduction of the OFDM system peak-to-average power ratio can obtain the PAPR performance similar to the original SLM method and can greatly reduce the calculation complexity so as to improve the performances of the OFDM system.

Description

technical field [0001] The invention relates to the technical field of digital communication, in particular to a threshold classification SLM method and system for reducing the peak-to-average power ratio of an OFDM system. Background technique [0002] Orthogonal frequency division multiplexing (OFDM) technology is a relatively special multi-carrier transmission technology, which can be regarded as either a modulation technology or a multiplexing technology. OFDM technology shows obvious advantages in anti-multipath fading, anti-narrowband interference multiple access, spectrum utilization and signal processing. At present, it has been widely used in many fields of wireless communication with its unique advantages, such as wireless local area network, digital audio and video broadcasting and asymmetric digital subscriber line standards and so on. The future mobile communication technology represented by 5G transmission technology is developing rapidly. In the research of i...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2614
Inventor 王灵垠周壮
Owner UNIV OF JINAN
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