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Partial transmit sequences grouping method for index modulating

A technology of index modulation and partial transmission, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of no valid data, different, etc., to achieve the effect of improving performance, reducing the degree of correlation, and improving system performance

Inactive Publication Date: 2017-06-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when SIM is introduced, the traditional PTS method will generate probabilistically unequal effective data in the packet. SIM divides all subcarriers into several blocks, each block has the same number of subcarriers, and the data is in The index information of all activated sub-carriers is also brought into the input information at the same time. The generation of this index information is irregular. Therefore, the positions of the activated sub-carriers in each sub-block are different, so that after some interleaving , performing PTS grouping will generate probabilistically unequal valid data. In extreme cases, there are almost no valid data in some groups.

Method used

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  • Partial transmit sequences grouping method for index modulating
  • Partial transmit sequences grouping method for index modulating
  • Partial transmit sequences grouping method for index modulating

Examples

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Effect test

Embodiment 1

[0035] In this example, the number of subcarriers is 256, the modulation method is QPSK modulation, the index modulation method is 8 subcarriers as a submodule, each submodule has one valid data, the PTS grouping is 8 groups, and the phase factor is ±1. This example takes the following steps:

[0036] Step 1: Calculate the required number of bits according to the modulation method and the subcarrier index modulation method, and then generate symbols through two kinds of modulation;

[0037] Step 2: Perform two operations on the generated data symbols, one is to directly process the data symbols through the interleaving method, and the other is to record the interleaving index of each symbol while processing through the interleaving method.

[0038] Step 3: Perform two operations on the interleaved data, one is to directly perform PTS grouping (here divided into 8 groups), and the other is to use the recorded interleaving index to extract from several data belonging to the same...

Embodiment 2

[0043] In this example, the number of sub-carriers is 256, the modulation method is QPSK modulation, the index modulation method is 16 sub-carriers as a sub-module, each sub-module has one valid data, the PTS grouping is 8 groups, and the phase factor is ±1. , this example takes the following steps:

[0044] Step 1: Calculate the required number of bits according to the modulation method and the subcarrier index modulation method, and then generate symbols through two kinds of modulation;

[0045] Step 2: Perform two operations on the generated data symbols, one is to directly process the data symbols through an interleaving method, and the other is to record the interleaving index of each symbol while processing through the interleaving method;

[0046] Step 3: Perform two operations on the interleaved data, one is to directly perform PTS grouping (here divided into 8 groups), and the other is to use the recorded interleaving index to extract from several data belonging to th...

Embodiment 3

[0051] In this example, the number of sub-carriers is 256, the modulation method is QPSK modulation, the index modulation method is 16 sub-carriers as a sub-module, each sub-module has one valid data, the PTS is grouped into 4 groups, and the phase factor is ±1. , this example takes the following steps:

[0052] Step 1: Calculate the required number of bits according to the modulation method and the subcarrier index modulation method, and then generate symbols through two kinds of modulation;

[0053] Step 2: Perform two operations on the generated data symbols, one is to directly process the data symbols through the interleaving method, and the other is to record the interleaving index of each symbol while processing through the interleaving method. ;

[0054] Step 3: Perform two operations on the interleaved data, one is to directly perform PTS grouping (here divided into 4 groups), and the other is to use the recorded interleaving index to extract from several data belongi...

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Abstract

The invention belongs to the technical field of communication anti-interference, and specifically relates to a partial transmit sequences grouping method for index modulating. Aiming at solving the problem that a traditional partial transmit sequences grouping method and system cannot be adaptive to a PTS grouping scheme for subcarrier index modulating, the invention provides a PTS method for subcarrier index modulating, that is, a partial transmit sequences (PTS) grouping method for index modulating. The partial transmit sequences grouping method for index modulating has the advantages of 1) introducing a new mapping method to enable the subcarriers in each sublock to be independent to each other, thus increasing the minimum Euclidean distance so as to improve the system performance; and 2) aiming at different degrees of subcarrier indexes, during the PTS grouping process, being able to guaranteeing that the distributed each group of data to have the same valid data, and reducing the correlation degree so as to reduce the performance of PAPR.

Description

technical field [0001] The invention belongs to the technical field of communication anti-jamming, and in particular relates to a partial transmission sequence grouping method for index modulation; the present invention relates to a partial transmission sequence method (Partial transmit sequence, PTS), adjacent segmentation (adjacent), random Techniques such as pseudo-random and interleaved. Background technique [0002] Partial transmission sequence method technology is a kind of probability technology (also known as non-distortion technology or signal scrambling technology). Its implementation does not focus on reducing the maximum value of the signal amplitude, but on reducing the probability of high peaks occurring. The basic principle of this technology is: divide the input signal in the OFDM system into a combination of several identical but non-repeating subsequences, and then perform weighted combination of these subsequences. Different auxiliary weighting informati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/26
Inventor 李志明肖悦王金福
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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