CN109617580A - A kind of empty mapping method for moving keying - Google Patents
A kind of empty mapping method for moving keying Download PDFInfo
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- CN109617580A CN109617580A CN201910079468.7A CN201910079468A CN109617580A CN 109617580 A CN109617580 A CN 109617580A CN 201910079468 A CN201910079468 A CN 201910079468A CN 109617580 A CN109617580 A CN 109617580A
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- 238000013507 mapping Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000011159 matrix material Substances 0.000 claims abstract description 15
- 238000005516 engineering process Methods 0.000 abstract description 17
- 230000004913 activation Effects 0.000 abstract description 9
- 238000004891 communication Methods 0.000 abstract description 9
- 238000001228 spectrum Methods 0.000 abstract description 8
- 238000004088 simulation Methods 0.000 abstract description 4
- 239000013598 vector Substances 0.000 abstract description 3
- 230000003213 activating effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- URWAJWIAIPFPJE-YFMIWBNJSA-N sisomycin Chemical compound O1C[C@@](O)(C)[C@H](NC)[C@@H](O)[C@H]1O[C@@H]1[C@@H](O)[C@H](O[C@@H]2[C@@H](CC=C(CN)O2)N)[C@@H](N)C[C@H]1N URWAJWIAIPFPJE-YFMIWBNJSA-N 0.000 description 4
- 238000005562 fading Methods 0.000 description 3
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- 238000011161 development Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000007476 Maximum Likelihood Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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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
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0612—Space-time modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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Abstract
The invention belongs to wireless communication technology fields, and in particular to a kind of empty mapping method for moving keying.Activation antenna is selected in a moment different from traditional empty keying that moves, this method combines multiple moment, the joint of index selection activation moments and activation antenna that data to be transmitted is constituted, modulated data are not vectors but a matrix, click-through line activating therein, activation point transmission data 1 are selected in the confederate matrix of moment and antenna.In the scheme proposed, joint time domain maps transmission data, can increase selectable status number on the one hand to promote spectrum efficiency；On the other hand, this method has and empty moves better bit error rate (Error Bit Rate, the BER) performance of keying mapping method than traditional it can be seen from subsequent simulation result.
Description
Technical field
The invention belongs to wireless communication technology fields, and in particular to it is a kind of it is empty move keying (Space Shift Keying,
SSK mapping method).
Background technique
Now, with the development of society, wireless communication technique has been deep into the every aspect of our daily lifes, people
Quality and bandwidth to communication have new demand.Single-input single-output (Single-Input Single-Output, SISO)
Obviously oneself cannot be met the needs of users antenna system, how to be improved communication bandwidth and had become research hotspot instantly.Mobile logical
Believe in development process, the research of multiple-input and multiple-output (Multiple-Input Multiple-Output, MIMO) technology and answers
With obtaining quantum jump.Compared to SISO, main advantage is:, can be under conditions of being not take up additional communication bandwidth
Capacity, performance and the service quality of system are significantly improved, and reduces the construction cost of communication base station.MIMO technology it is basic
Principle is all carried out data transmission using more antennas in the reception of communication system and transmitting terminal, and transmission space work is taken full advantage of
For parallel transmission channels, transmission space is allowed to become a kind of resource for promoting communication system performance, to increase power system capacity and mention
High spectrum utilization.Compared with SISO, the capacity and antenna amount of mimo system are linearly related, linear with the increase of antenna number
Increase, in the case that the channel fading coefficient between transmitting-receiving both ends antenna is mutually indepedent, the capacity of mimo system can be equal to
The SISO parallel channel capacity of corresponding number.In the following 5G system, MIMO technology is following mobile logical by indispensable becoming
The core technology of system spectral efficiency can be greatly improved in letter system.
Traditional MIMO technology activates transmission multi-stream data using whole antennas in transmitting terminal simultaneously.Sky moves keying
(Space Shift Keying, SSK) technology is to be suggested MIMO new technology in recent years, is got more and more people's extensive concerning.SSK skill
The thinking of art and traditional MIMO technology are the difference is that tradition MIMO is adjusted with APM (Amplitude/Phase Modulation)
Whole binary data informations that symbols carry processed is sent, and SSK technology carries a part two of transmission using antenna serial number
Binary data information.Compared to traditional MIMO technology, this new technology per moment only activates one or a small amount of antenna, i.e. radio frequency
(Radio Frequency, RF) link is greatly reduced, therefore avoids and reduce interchannel interference, and thus substantially reduce
The synchronous complexity in sending and receiving end, new technology is also particularly suitable the unbalanced system of sending and receiving end antenna, in extensive MIMO
There is extraordinary application prospect.But the MIMO new technology of SSK haves the shortcomings that spectrum efficiency is low low with transmitting antenna utilization rate.
Summary of the invention
Low for existing empty shifting key control technology spectrum efficiency, the low problem of transmitting antenna utilization rate, the invention proposes one
The follow-on empty shifting keying mapping mode with spectral efficient of kind, activates day different from traditional selection in a moment
Line, this method combine the joint of multiple index selection activation moments that at the moment, data to be transmitted is constituted and activation antenna, modulation
Data afterwards are not vectors but a matrix, i.e., click-through line activating therein is selected in the confederate matrix of moment and antenna,
Activation point transmission data 1.In the scheme proposed, joint time domain maps transmission data, and on the one hand can increase can
The status number of selection is to promote spectrum efficiency；On the other hand, this method has than passing it can be seen from subsequent simulation result
The empty of system moves the better bit error rate of keying mapping method (Error Bit Rate, BER) performance.
The technical scheme is that
Using the joint index transmitted bit information of transmitting antenna and moment, i.e., corresponded to using data to be transmitted selection activation
Serial number moment and antenna, modulated data are not vectors but a matrix, the point transmission data 1 being activated in matrix, rope
Draw selection activation principle are as follows: guarantee that a moment at most activates an antenna；In receiving end, pass through maximum- likelihood estimation solution
It recalls transmitting terminal to be activated antenna serial number, then moves keying code book using sky and recover to send bit data and complete data and transmit.
Specifically includes the following steps:
Transmitting terminal:
S1, a string of data bits to be transmitted are generated；
S2, data to be transmitted bit carry out SSK mapping according to the empty keying code book that moves of proposition after serioparallel exchange, to be transmitted
Data will be mapped as a nTxThe matrix of × nslot size, wherein nTxIndicate transmitting antenna number, nslot indicates that institute is united
Timeslot number, the data bit that empty shifting keying mapping mode proposed by the present invention can pass is log2(nslot*nTx+nTx nslot)。
Wherein it is as shown in the table to combine the empty shifting keying code book at two moment for 2 transmitting antennas:
12 transmitting antenna of table combines two moment skies and moves keying code book
When transmitting antenna is 4, Index Status number is 24, and the bit that can be passed isSo need to therefrom select
Take 16 kinds of states, for following table:
24 transmitting antenna of table combines two moment skies and moves keying code book
Wherein ()TThe inversion operation of representing matrix.
Table 1, table 2 give the case where 2 transmitting antennas and 4 transmitting antennas, 2 time slots of joint, other situations and so on.
Receiving end:
S3, all possible state for sending bit is firstly generated；
S4, these status bits are all carried out to SSK mapping, and carries out convolution with channel, simulate all possible output
Value；
S5, it carries out reception signal to seek two norms with these values one by one, selects the state and basis of two Norm minimums
Sky moves keying code book and carries out demapping.
Technical solution of the present invention proposes a kind of empty mapping mode for moving keying for MIMO technology.Beneficial effect of the invention
Fruit is: while improving spectrum efficiency, bit error rate performance also has some improvement.
Detailed description of the invention
Fig. 1 is that sky proposed by the present invention moves keying mapping and traditional empty shifting keying is mapped in transmitting antenna number and is set as 2,
Receiving antenna number is set as bit error rate performance contrast simulation figure when 4；
Fig. 2 sky proposed by the present invention moves keying mapping and traditional empty shifting keying is mapped in transmitting antenna number and is set as 4, connects
Receive bit error rate performance contrast simulation figure when antenna number is set as 4.
Specific embodiment
With reference to the accompanying drawings and examples, the technical schemes of the invention are described in detail:
Example 1:
In this example, transmitting antenna number 2, receiving antenna number is 4, and two moment joint antennas can pass 3 data bits, channel
For Rayleigh list diameter channel, the real and imaginary parts Gaussian distributed of impulse response.This example uses following steps:
Step 1: the random string length that generates is 384 [0 1] data bit, and carries out serial/parallel conversion, becomes 3*128
Bit data matrix；
Step 2: according to of the present invention, by each column of bit data matrix carry out it is empty move keying mapping, it is final to emit
Signal is the modulation symbol matrix of 2*256, and by Rayleigh single path fading channel and white Gaussian noise is added；
Step 3: receiving end firstly generates all possible state for sending bit, and carries out spatial modulation to each state
Mapping will receive signal and seek two norms one by one with obtained value, select two Norm minimums then with signal impulse response convolution
One state carries out demapping, finally exports by parallel/serial conversion；
Step 4: output data and primary data comparison statistics are obtained into BER.
It can be obtained according to Fig. 1, a kind of empty mapping mode for moving keying proposed in this paper, in the less situation of transmitting antenna number
Under, compared to traditional empty mapping mode for moving keying, the spectrum efficiency of transmission is not only increased, and bit error rate performance also has
Certain promotion.
Example 2:
In this example, transmitting antenna number 4, receiving antenna number is 4, and two moment joint antennas can pass 3 data bits, channel
For Rayleigh list diameter channel, the real and imaginary parts Gaussian distributed of impulse response.This example uses following steps:
Step 1: the random string length that generates is 512 [0 1] data bit, and carries out serial/parallel conversion, becomes 4*128
Bit data matrix；
Step 2: according to of the present invention, by each column of bit data matrix carry out it is empty move keying mapping, it is final to emit
Signal is the modulation symbol matrix of 4*256, and by Rayleigh single path fading channel and white Gaussian noise is added；
Step 3: receiving end firstly generates all possible state for sending bit, and carries out spatial modulation to each state
Mapping will receive signal and seek two norms one by one with obtained value, select two Norm minimums then with signal impulse response convolution
One state carries out demapping, finally exports by parallel/serial conversion；
Step 4: output data and primary data comparison statistics are obtained into BER.
It can obtain according to fig. 2, a kind of empty mapping mode for moving keying proposed in this paper, in the more situation of transmitting antenna number
Under, compared to traditional empty mapping mode for moving keying, under the spectrum efficiency of identical transmission, available better BER
Performance.
Claims (1)
1. a kind of empty mapping method for moving keying, which is characterized in that utilize the joint index transmitted bit of transmitting antenna and moment
Information activates corresponding serial number moment and antenna using data to be transmitted selection, the point transmission data 1 being activated, index selection
Activate principle are as follows: guarantee that a moment at most activates an antenna；Specifically includes the following steps:
Transmitting terminal:
S1, a string of data bits to be transmitted are generated；
S2, each column of bit data matrix are subjected to empty shifting keying mapping, obtain and sends signal,
Receiving end:
S3, all possible state for sending bit is generated, that is, assumes n data bit of transmission, then all possible status number
It is 2nKind；
S4, these status bits are all carried out to empty shifting keying mapping, and carries out convolution with channel, simulate all possible output
Value；
S5, it carries out reception signal to seek two norms with the output valve of step S4 one by one, selects a state of two Norm minimums simultaneously
Keying code book, which is moved, according to sky carries out demapping.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910079468.7A CN109617580B (en) | 2019-01-28 | 2019-01-28 | Mapping method of space shift keying |
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| CN201910079468.7A CN109617580B (en) | 2019-01-28 | 2019-01-28 | Mapping method of space shift keying |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112367123A (en) * | 2020-11-10 | 2021-02-12 | 兰州理工大学 | Light space-time keying modulation method suitable for turbulent flow channel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103581087A (en) * | 2013-11-21 | 2014-02-12 | 电子科技大学 | Binary digital signal space shift keying modulation and demodulation method for multi-input multi-output system |
| CN103986677A (en) * | 2014-05-05 | 2014-08-13 | 电子科技大学 | Keying modulation method based on transmit diversity |
| CN104270227A (en) * | 2014-10-16 | 2015-01-07 | 中国人民解放军理工大学 | Null-shift-keying-based physical layer safety transmission method in multi-input single-output system |
| CN104780024A (en) * | 2015-04-14 | 2015-07-15 | 电子科技大学 | Multi-stream space-shift keying modulation method and demodulation method in MIMO system |
| WO2017172985A1 (en) * | 2016-03-30 | 2017-10-05 | Idac Holdings, Inc. | Multiple dimension modulation in 5g systems |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103581087A (en) * | 2013-11-21 | 2014-02-12 | 电子科技大学 | Binary digital signal space shift keying modulation and demodulation method for multi-input multi-output system |
| CN103986677A (en) * | 2014-05-05 | 2014-08-13 | 电子科技大学 | Keying modulation method based on transmit diversity |
| CN104270227A (en) * | 2014-10-16 | 2015-01-07 | 中国人民解放军理工大学 | Null-shift-keying-based physical layer safety transmission method in multi-input single-output system |
| CN104780024A (en) * | 2015-04-14 | 2015-07-15 | 电子科技大学 | Multi-stream space-shift keying modulation method and demodulation method in MIMO system |
| WO2017172985A1 (en) * | 2016-03-30 | 2017-10-05 | Idac Holdings, Inc. | Multiple dimension modulation in 5g systems |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112367123A (en) * | 2020-11-10 | 2021-02-12 | 兰州理工大学 | Light space-time keying modulation method suitable for turbulent flow channel |
| CN112367123B (en) * | 2020-11-10 | 2022-08-12 | 兰州理工大学 | Light space-time keying modulation method suitable for turbulent flow channel |
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