CN108521318A - Intertexture de-interweaving method suitable for SIM-OFDM systems - Google Patents
Intertexture de-interweaving method suitable for SIM-OFDM systems Download PDFInfo
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- CN108521318A CN108521318A CN201810352817.3A CN201810352817A CN108521318A CN 108521318 A CN108521318 A CN 108521318A CN 201810352817 A CN201810352817 A CN 201810352817A CN 108521318 A CN108521318 A CN 108521318A
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- interleaver
- sim
- bit
- intertexture
- index
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
- H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
Abstract
The invention belongs to Communication Anti-Jamming Techniques fields, particularly relate to a kind of intertexture de-interweaving method suitable for SIM ofdm systems.When for traditional interleaving treatment by specific interleaver, bit modulation is not indexed to come from interleaver Resource selection interleaver, in this way, information content is comparatively smaller in transmittance process, the frequency spectrum resource utilization rate of equal extent is not very high situation, the present invention provides the technologies that a kind of bit information selects interleaver, i.e. in the transmitting terminal of signal, interleaver index selection bit is added in the information generated every time, in this way in equal extent, the transmitted bit for increasing information, improves frequency spectrum resource utilization rate.
Description
Technical field
The invention belongs to Communication Anti-Jamming Techniques fields, particularly relate to a kind of friendship suitable for SIM-OFDM systems
De-interweaving method is knitted, sub-carrier indices modulation (Subcarrier Index Modultaion, SIM) is more specifically to arrived,
The technologies such as Interleaved partitioning scheme (interleaved).
Background technology
Traditional interleaving treatment is carried out by specific interleaver, is not indexed bit modulation and is come from interleaver
Resource selection interleaver, in this way, information content is comparatively relatively low in transmittance process, the frequency spectrum resource utilization rate of equal extent
It is not very high.
Invention content
The purpose of the present invention, aiming at the above problem, it is proposed that be suitable for the intertexture deinterleaving side of SIM-OFDM systems
Method improves frequency spectrum resource utilization rate to effectively increase the transmitted bit of information.
In order to make it easy to understand, carrying out following explanation to the technology used in the present invention：
Sub-carrier indices modulate (Subcarrier Index Modultaion, SIM), and basic thought is to utilize index letter
Breath selects a part of subcarrier to transmit data, the system for having N number of subcarrier for one, and all subcarriers have been partitioned into G
A sub-block, each sub-block have L=N/G subcarrier.Each sub-block can be expressed as：Yg=[Yg,0,Yg,1,...,Yg,L-1]T, g
=0,1,2 ... G-1. can be write as to send signal：
In SIM-OFDM, sub-block YgIt is the basic unit of modulates information, can be expressed as：
Yg=[0 ... 0, Ag,0,0,...0,Ag,1,0,...0,...Ag,K-1,0,...0]T
Interleaving technology (interleave), for transmission information bit Error Control.Transmission information bit mistake is often
What bunchiness occurred, in order to solve this problem, the subsequent bits order change in message is become into non-subsequent bits sequence, by this
One thought applies on symbol interleaving, and the symbol after modulated is after interleaver using IFFT.
Technical scheme is as follows：
Intertexture de-interweaving method suitable for SIM-OFDM systems, which is characterized in that including：
Index bit is added in the information generated every time in transmitting terminal, for selecting index corresponding in interleaver set
Interleaved sequence chooses corresponding interleaver from interleaver set according to interleaver index bit and is interleaved processing；
Receiving terminal carries out one during deinterleaving, by each interleaver in interleaver set with data are received
Secondary deinterleaving processing, after deinterleaving, is matched with sim module structure, sees whether meet the modulated Data Styles of SIM, i.e.,
Each SIM blocks are activated there are one subcarrier, and the interleaver met the requirements is selected to be deinterleaved, in set where interleaver
Position is the decimal representation of index bit.
Beneficial effects of the present invention are：The transmitted bit for increasing information, improves frequency spectrum resource utilization rate.
Description of the drawings
Fig. 1 is the transmitting terminal system block diagram of the intertexture de-interweaving method suitable for SIM-OFDM systems；
Fig. 2 is the receiving terminal system block diagram of the intertexture de-interweaving method suitable for SIM-OFDM systems；
Fig. 3 is the BER performance comparisons of the intertexture de-interweaving method suitable for SIM-OFDM systems；
Fig. 4 is BER of the intertexture de-interweaving method in different interleaving device set sizes suitable for SIM-OFDM systems
It can comparison.
Specific implementation mode
With reference to the accompanying drawings and examples, detailed description of the present invention technical solution：
As depicted in figs. 1 and 2, the method disclosed by the invention mainly comprises：
Step 1：Carry out the interleaver serial number modulation of SIM symbol-modulateds and index bit.
The system for having N number of subcarrier for one, all subcarriers have been partitioned into G sub-block, and each sub-block has L=
N/G subcarrier.Each sub-block can be expressed as：
Yg=[Yg,0,Yg,1,...,Yg,L-1]T, g=0,1,2 ... G-1.
In SIM-OFDM, sub-block YgIt is the basic unit of modulates information, can be expressed as：
Yg=[0 ... 0, Ag,0,0,...0,Ag,1,0,...0,...Ag,K-1,0,...0]T
Assuming that interleaver range of convergence is M, then it is bottom M to several bits that modulation bit number, which is with 2, this is modulated to hand over
Knit device serial number.
Step 2：The interleaver serial number obtained according to modulation is from one interleaver of selection is interleaved in interleaver set
Reason
Interleaver set is the standard set that sender and recipient both know about, and therefrom selects an interleaver to passing through
The symbol of SIM modulation carries out symbol interleaving.After interleaving treatment, the valid data index position of each submodule will become
Change.
Step 3：During the deinterleaving of receiving terminal, because interleaver set is the mark that sender and recipient both know about
Quasi- set, so, after by channel equalization, each interleaver in interleaver set is carried out one with data are received
Secondary deinterleaving processing, after deinterleaving, is matched with sim module structure, sees whether meet the modulated Data Styles of SIM, i.e.,
Each SIM blocks are activated there are one subcarrier, and the interleaver met the requirements is selected to be deinterleaved, in set where interleaver
Position is the decimal representation of index bit.
Step 4：By deinterleaving process, three parts information is obtained, first, symbolic information；Second is that the index letter of SIM modulation
Breath；Third, the index bit information of serial number of the interleaver in interleaver set used in deinterleaving process itself.
Embodiment 1
In this example, 1,000,000 emulation is carried out, sub-carrier number is 1024, and modulation system is modulated for BPSK, index modulation
Mode is that 2 subcarriers are a submodule, one valid data of each submodule.
Step 1：The interleaver serial number modulation for carrying out SIM symbol-modulateds and index bit, according to data modulation, sub- load
Wave index modulation mode and interleaver set M sizes calculate required bit number, interleaver set M sizes are respectively 8,16,
32,64, then pass through three kinds of modulation and generates SIM symbols and interleaver serial number.
Step 2：The interleaver serial number obtained according to modulation is from one interleaver of selection is interleaved in interleaver set
The data symbol generated is done intertexture operation by reason.
Step 3：During the deinterleaving of receiving terminal, the operation of traditional intertexture in interleaver set without by selecting
The processing of interleaver, and interleaver set is the standard set that sender and recipient both know about, so, by channel equalization
Later, each interleaver in interleaver set is subjected to primary deinterleaving processing with data are received, after deinterleaving, with
Sim module structure is matched, and sees whether meet the modulated Data Styles of SIM, i.e., each SIM blocks are swashed there are one subcarrier
It is living, select the interleaver met the requirements to be deinterleaved, the position in set where interleaver is the decimal system of index bit
It indicates.
Step 4：It will be compared by 4 kinds of interleaver set and traditional interleaving procedure.
It can obtain according to fig. 3, traditional ISIM-OFDM systems are with the SIM-OFDM based on interleaver selection in different interleaving device
BER performance comparisons when set sizes, in the bottom of 5 curves, 4 are adjusted traditional ISIM-OFDM based on interleaver index
The BER curve of SIM-OFDM processed is not above traditional wire as a comparison, and reason is that new method only increases each biography
Defeated data volume, and there is no castering action to the BER performances of SIM-OFDM entirety；On the contrary, sentencing wrong interleaver index in receiving terminal
When can reduce whole BER performances.Simulation result when pecked line in figure is indicated using 64 interleavers, it is in 4 lines
The top of (not including traditional performance line as a comparison), and the performance line of 8 interleavers is in the bottom of 4 lines.
Embodiment 2
In this example, 1,000,000 emulation is carried out, sub-carrier number is 1024, and modulation system is modulated for BPSK, index modulation
Mode is that 2 subcarriers are a submodule, one valid data of each submodule.
Step 1：The interleaver serial number modulation for carrying out SIM symbol-modulateds and index bit, according to data modulation, sub- load
Wave index modulation mode and interleaver set M sizes calculate required bit number, interleaver set M sizes are respectively 8,16,
32,64, then pass through three kinds of modulation and generates SIM symbols and interleaver serial number.
Step 2：The interleaver serial number obtained according to modulation is from one interleaver of selection is interleaved in interleaver set
The data symbol generated is done intertexture operation by reason.
Step 3：During the deinterleaving of receiving terminal, interleaver set is the standard set that sender and recipient both know about
Close, so, by after channel equalization, by interleaver set each interleaver with receive data and once solved
Interleaving treatment after deinterleaving, is matched with sim module structure, sees whether meet the modulated Data Styles of SIM, i.e., each
SIM blocks are activated there are one subcarrier, and the interleaver met the requirements is selected to be deinterleaved, the position in set where interleaver
The as decimal representation of index bit.
Step 4：It will be compared by 4 kinds of interleaver set.
It can be obtained according to Fig. 4, it will be seen that with the reduction of interleaver number, BER performances are obviously improved, then based on interweaving
The BER performances of the SIM-OFDM of device index modulation also have similar feature, show that interleaver number is reduced, BER performances
In the trend to improve.
Claims (1)
1. the intertexture de-interweaving method suitable for SIM-OFDM systems, which is characterized in that including：
Index bit is added in the information generated every time in transmitting terminal, for the corresponding intertexture of selection index in interleaver set
Sequence chooses corresponding interleaver from interleaver set according to interleaver index bit and is interleaved processing；
Receiving terminal is once solved during deinterleaving, by each interleaver in interleaver set with data are received
Interleaving treatment after deinterleaving, is matched with sim module structure, sees whether meet the modulated Data Styles of SIM, i.e., each
SIM blocks are activated there are one subcarrier, and the interleaver met the requirements is selected to be deinterleaved, the position in set where interleaver
The as decimal representation of index bit；
Wherein, it is known that interleaver, which is integrated into transmitting terminal and receiving terminal,.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114944978A (en) * | 2022-05-16 | 2022-08-26 | 西安交通大学 | Weighted Alamouti coded media modulation system, method, terminal device and storage medium |
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| CN103634260A (en) * | 2013-12-06 | 2014-03-12 | 电子科技大学 | SC-IFDMA (single carrier-interleaved frequency division multiple access) communication method based on SIM (subscriber identity module) modulation |
| CN103647741A (en) * | 2013-12-19 | 2014-03-19 | 电子科技大学 | Subcarrier Index Modulation (SIM)-Orthogonal Frequency Division Multiplexing (OFDM) based superposition coded modulation method |
| US9380448B2 (en) * | 2010-02-09 | 2016-06-28 | Mediatek Inc. | Methods for accessing subscriber identity cards via a dedicated interface and systems containing subscriber identity cards each with a dedicated interface |
| CN107070601A (en) * | 2017-04-18 | 2017-08-18 | 电子科技大学 | The method that PAPR is reduced based on the matching interleaver that sub-carrier indices are modulated |
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2018
- 2018-04-19 CN CN201810352817.3A patent/CN108521318A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8321489B2 (en) * | 2006-09-15 | 2012-11-27 | National Semiconductor Corporation | Software reconfigurable digital phase lock loop architecture |
| US9380448B2 (en) * | 2010-02-09 | 2016-06-28 | Mediatek Inc. | Methods for accessing subscriber identity cards via a dedicated interface and systems containing subscriber identity cards each with a dedicated interface |
| CN103634260A (en) * | 2013-12-06 | 2014-03-12 | 电子科技大学 | SC-IFDMA (single carrier-interleaved frequency division multiple access) communication method based on SIM (subscriber identity module) modulation |
| CN103647741A (en) * | 2013-12-19 | 2014-03-19 | 电子科技大学 | Subcarrier Index Modulation (SIM)-Orthogonal Frequency Division Multiplexing (OFDM) based superposition coded modulation method |
| CN107070601A (en) * | 2017-04-18 | 2017-08-18 | 电子科技大学 | The method that PAPR is reduced based on the matching interleaver that sub-carrier indices are modulated |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114944978A (en) * | 2022-05-16 | 2022-08-26 | 西安交通大学 | Weighted Alamouti coded media modulation system, method, terminal device and storage medium |
| CN114944978B (en) * | 2022-05-16 | 2024-04-02 | 西安交通大学 | Weighted Alamouti coded medium modulation system, method, terminal equipment and storage medium |
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