Cooperative transmission method for extended hybrid carrier modulation and data interleaving

A mixed carrier and coordinated transmission technology, applied in digital transmission system, transmission system, multi-carrier system, etc., can solve the problem of poor anti-channel performance, achieve good compatibility, enhance anti-channel fading performance and anti-channel burst error performance, the effect of reducing the probability of deep fading loss

Active Publication Date: 2021-05-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor performance of the existing communication method against channel fading, and propose a coordinated transmission method of extended mixed carrier modulation and data interleaving

Method used

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  • Cooperative transmission method for extended hybrid carrier modulation and data interleaving
  • Cooperative transmission method for extended hybrid carrier modulation and data interleaving
  • Cooperative transmission method for extended hybrid carrier modulation and data interleaving

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specific Embodiment approach 1

[0051] Specific implementation mode 1. Combination figure 1 This embodiment will be described. An extended hybrid carrier modulation and data interleaving coordinated transmission method described in this embodiment, the method specifically includes the following steps:

[0052] Step 1. Perform baseband constellation mapping on the 0 and 1 bit data generated by the information source, and obtain the modulation result after constellation mapping;

[0053] Step 2, group the modulation results obtained in step 1, divide the modulation results into M data blocks of equal length, each data block corresponds to a frame of data; use X i′ , i'=1,2,3,..., M represents the i'th frame data, M is the total number of data blocks;

[0054] Step 3, respectively performing extended mixed carrier modulation on each frame of data obtained in step 2, to obtain an output signal obtained by extending each frame of data through extended mixed carrier modulation;

[0055] The output signal obtain...

specific Embodiment approach 2

[0078] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is that the specific process of the step two is:

[0079] Starting from the first bit of the modulation result obtained in step 1, divide the modulation result into M data blocks of equal length, and the length L of each data block is 2 N , N is a positive integer;

[0080] i'th frame data X i′ =[x 0 x 1 … x L-1 ], x 0 , x 1 ,...,x L-1 Respectively for the i′th frame data X i′ 1st, 2nd, ..., 2nd of N data.

[0081] In this embodiment, the grouping starts from the first data of the modulation result, and the first data to the second data of the modulation result N The data is divided into one group, as the first data block, corresponding to the first frame data; the second of the modulation result N +1 data to the 2nd N+1 The data is divided into one group, as the second data block, corresponding to the second frame data; similarly, until t...

specific Embodiment approach 3

[0082] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the value of the number of data frames M' in each group is N * Represents a positive integer.

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Abstract

The invention discloses a cooperative transmission method for extended hybrid carrier modulation and data interleaving, and belongs to the technical field of wireless communication. According to the invention, the problem of poor channel fading resistance of the existing communication method is solved. The invention designs an interleaving transmission method of an extended mixed carrier signal, which forms an anti-fading signal form with dispersed burst error energy and dispersed burst error position capability by performing inter-block bit interleaving on the extended mixed carrier signal. Under a channel condition with a long burst error, the burst error can be converted into a statistical independent error due to replacement of signal sorting by interleaving, and meanwhile, energy dispersion and compensation are performed on a symbol influenced by the burst error by extended hybrid carrier modulation, so that the probability of deep attenuation loss is greatly reduced, a receiving end can recover an original signal, and the communication reliability of the wireless communication system under a complex channel condition is effectively improved. The method can be applied to the technical field of wireless communication.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a coordinated transmission method of extended mixed carrier modulation and data interleaving. Background technique [0002] In the process of wireless communication, channel errors usually coexist with random errors and burst errors. As a technical means to improve communication reliability, interleaving coding has been widely researched and applied in wireless communication systems against channel burst errors because of its ability to discretize longer burst errors into random errors. However, the existing interleaving technology does not have the ability to preserve and compensate the energy of symbols in deep fading positions. Although it can be combined with error correction codes to restore the original signal against channel fading, it reduces the transmission efficiency. Extended weighted fractional Fourier transform, as a new signal processing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/36H04L27/38
CPCH04L1/0071H04L27/362H04L27/38
Inventor 沙学军宋鸽房宵杰廖壮壮
Owner HARBIN INST OF TECH
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