OFDM system peak power optimization method based on block interleaving and transmission system thereof

An optimization method and peak power technology, applied in transmission systems, multi-frequency code systems, digital transmission systems, etc., can solve problems such as system performance deterioration, high computational complexity, and peak power problems, so as to avoid IFFT calculations and reduce calculations Complexity, Effect of Improving Peak Power Optimization Accuracy

Active Publication Date: 2018-05-18
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although OFDM technology has many advantages, it also has obvious shortcomings. The problem of peak power has always been one of the main defects of this technology.
Excessive peak power will cause OFDM signal distortion, which will lead to system performance degradation
Therefore, the peak power problem has always been one of the biggest obstacles to the practical application of OFDM technology
Since each generation of a candidate signal requires an Inverse Fast Fourier Transform (IFFT) to realize OFDM modulation, the computational complexity is very large, which has become one of the biggest obstacles to the implementation of this method.
[0016] To sum up, in the prior art, for the OFDM system using Binary Phase Shift Keying (Binary PSK, BPSK) mapping method, there is still a lack of effective solutions to the problem of very large computational complexity of the existing block interleaving method

Method used

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  • OFDM system peak power optimization method based on block interleaving and transmission system thereof
  • OFDM system peak power optimization method based on block interleaving and transmission system thereof
  • OFDM system peak power optimization method based on block interleaving and transmission system thereof

Examples

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Embodiment 1

[0067] In a typical implementation of this application, such as figure 1 As shown, a method for optimizing the peak power of an OFDM system based on block interleaving is provided, which includes the following steps:

[0068] Step 101: Use the binary random sequence generator module to generate a binary sequence, and use the mapping A module and the mapping B module to map the binary sequence into a baseband frequency domain signal sequence S A And baseband frequency domain signal sequence S B ;

[0069] Step 102: Convert the baseband frequency domain signal sequence S A And baseband frequency domain signal sequence S B Perform block processing respectively, and get the sequence X after block processing A And X B ;

[0070] Step 103: Sequence X obtained after block processing A And sequence X B Perform multiple block interleaving to get several different sequences A i And sequence B j ;

[0071] Step 104: For several different sequences A i And sequence B j Perform inverse fast Fourier...

Embodiment 2

[0101] Another typical implementation of this application, such as image 3 As shown, a transmission system based on the peak power optimization method of an OFDM system based on block interleaving is provided. The system includes a binary random sequence generator module, a mapping A module, a mapping B module, a block module, a block interleaving module, an IFFT module, The candidate signal processing module and the optimal candidate signal selection module, the binary random sequence generator module is respectively connected to the mapping A module and the mapping B module, and the mapping A module and the mapping B module are respectively connected to the input of the corresponding block module The output end of the block module is connected to a plurality of block interleaving modules, each block interleaving module is connected to the corresponding IFFT module, and the output ends of all IFFT modules are respectively connected to the candidate signal processing module and ...

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Abstract

The invention discloses an OFDM system peak power optimization method based on block interleaving and a transmission system thereof. The OFDM system peak power optimization method comprises the stepsof: generating a binary sequence by utilizing a binary random sequence generator module, and mapping the binary sequence into a base band frequency domain signal sequence SA and a base band frequencydomain signal sequence SB respectively by utilizing a mapping A module and a mapping B module; respectively carrying out blocking processing on the base band frequency domain signal sequences SA and SB to obtain sequences XA and XB after blocking processing; carrying out repeated block interleaving on the XA and the XB which are obtained after blocking processing to obtain a plurality of differentsequences Ai and Bj; respectively carrying out IFFT (Inverse Fast Fourier Transform) on the plurality of different sequences Ai and Bj to obtain a plurality of different candidate signals ai and bj,i.e., a first part of candidate signals; carrying out adding and amplitude weighting processing on a plurality of different candidate signals ai and bj in the first part of candidate signals to obtaina plurality of new candidate signals, i.e., a second part of candidate signals; and from all the candidate signals, selecting a candidate signal with the minimum PAPR value to carry out transmission.

Description

Technical field [0001] The present invention relates to the technical field of digital communication, in particular to a method for optimizing peak power of an OFDM system based on block interleaving and a transmitting system thereof. Background technique [0002] Orthogonal frequency division multiplexing, as a representative of multi-carrier modulation technology, has been applied to many fields of wireless communication because of its high-speed data transmission rate and resistance to frequency selective fading. Although OFDM technology has many advantages, it also has obvious shortcomings. The peak power problem has always been one of the main shortcomings of this technology. Excessive peak power will cause distortion of the OFDM signal, which in turn leads to deterioration of system performance. Therefore, the peak power problem has always been one of the biggest obstacles to the practical application of OFDM technology. [0003] For the OFDM system, the input binary bit se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2614
Inventor 王灵垠李念强赵越
Owner UNIV OF JINAN
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