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Peak power optimization method and transmission system of ofdm system based on block interleaving

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, and achieve reduced computational complexity and improved Peak power optimizes accuracy and avoids the effects of IFFT calculations

Active Publication Date: 2019-04-23
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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  • Peak power optimization method and transmission system of ofdm system based on block interleaving
  • Peak power optimization method and transmission system of ofdm system based on block interleaving
  • Peak power optimization method and transmission system of ofdm system based on block interleaving

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Effect test

Embodiment 1

[0067] In a typical implementation of the present application, such as figure 1 As shown, a method for optimizing peak power of an OFDM system based on block interleaving is provided, including 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 the baseband frequency domain signal sequence S B ;

[0069] Step 102: The baseband frequency domain signal sequence S A and the baseband frequency domain signal sequence S B Perform block processing separately to obtain the sequence X after block processing A and x B ;

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

[0071] Step 104: For several different sequences A i and sequence B j Pe...

Embodiment 2

[0101] Another typical implementation of the present application, such as image 3 As shown, a transmission system based on a block interleaving OFDM system peak power optimization method 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 connected with the mapping A module and the mapping B module respectively, and the mapping A module and the mapping B module are respectively connected to the input of the corresponding block module The output terminals of the block module are connected to multiple block interleaving modules, each block interleaving module is connected to the corresponding IFFT module, and the output terminals of all IFFT modules are respectively connected to the candidate signal processing module and ...

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Abstract

The present invention discloses a block interleaving-based OFDM system peak power optimization method and its transmitting system, using a binary random sequence generator module to generate a binary sequence, and using a mapping A module and a mapping B module to map the binary sequence into a baseband frequency domain Signal sequence S A and the baseband frequency domain signal sequence S B ; The baseband frequency domain signal sequence S A and S B Perform block processing separately to obtain the sequence X after block processing A and x B ; X obtained after block processing A and x B Perform multiple block interleaving to obtain several different sequences A i and B j ; for several different sequences A i and B j Perform IFFT transformation separately to obtain multiple different candidate signals a i and b j , that is, the first part of candidate signals; a plurality of different candidate signals a in the first part of candidate signals i and b j Addition and amplitude weighting are performed to obtain a plurality of new candidate signals, that is, the second part of candidate signals; from all the candidate signals, the candidate signal with the smallest PAPR value is selected for transmission.

Description

technical field [0001] The invention relates to the technical field of digital communication, in particular to a block interleaving-based OFDM system peak power optimization method and a transmitting system thereof. Background technique [0002] As a representative of multi-carrier modulation technology, OFDM has been applied to many fields of wireless communication because of its high-speed data transmission rate and its ability to resist frequency selective fading. 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 to be distorted, further deteriorating 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 sequence needs to be mapped first. The mapping methods mainly inclu...

Claims

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Application Information

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Patent Type & Authority Patents(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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