CN108540182A - Land mobile multi-satellite communication broad sense polarization modulator approach based on dual polarized antenna - Google Patents
Land mobile multi-satellite communication broad sense polarization modulator approach based on dual polarized antenna Download PDFInfo
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- CN108540182A CN108540182A CN201810332415.7A CN201810332415A CN108540182A CN 108540182 A CN108540182 A CN 108540182A CN 201810332415 A CN201810332415 A CN 201810332415A CN 108540182 A CN108540182 A CN 108540182A
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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
- H04B7/10—Polarisation diversity; Directional diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
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- Computer Networks & Wireless Communication (AREA)
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- Astronomy & Astrophysics (AREA)
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- Mobile Radio Communication Systems (AREA)
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Abstract
The invention belongs to Communication Anti-Jamming Techniques fields, more particularly to a kind of land mobile multi-satellite communication broad sense polarization modulator approach based on dual polarized antenna.Space-modulation technique and polar modulation technology are united and applied in land mobile satellite MIMO communication system by the present invention, compared with traditional SM system models, polar modulation technology is mainly extended to more satellite terrestrial mobile communication system by the solution of the present invention from single satellite terrestrial mobile communication system.Identical in transmission power, transmission rate of the invention is m=log2M+N, and the transmission rate of legacy system is m=log2M.Therefore compared with traditional design, transmission rate of the invention improves G=(log2M+N)/(log2M)。
Description
Technical field
The invention belongs to Communication Anti-Jamming Techniques fields, are related to polarization modulation (Polarized Modulation, PMod)
Technology, poliarizing antenna (Polarized Antenna) technology, land mobile satellite communication channel (Land Mobile Satellite,
) and multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) technology LMS.
Background technology
In recent years, being constantly progressive with economic fast-developing and technology, requirement of the people to communication system no longer office
It is limited to simple word and voice data transmission, but turns to the multimedia services such as high quality picture and text, voice and video.In order to suitable
Active demand using family to high quality multimedia service, important supplement and future of the satellite communication as mobile communications network
Essential component part in space-air-ground integration information network, with its Global coverage, bandwidth, maneuverability and branch
The features such as holding mobile terminal is increasingly becoming a kind of supplement side providing internet and mobile communications network service to Global Subscriber
Case, and the area that satellite communication can be destroyed for GCF ground communication facilities such as earthquake, tsunami, wars provides calamity emergency clothes
Business.
In satellite mobile communication system, can be to increase by the utilization rate of expansion system bandwidth or raising frequency band
The handling capacity of system, but spectral bandwidth is eventually limited, is carried so the band efficiency for being improved system using Advanced Communication Technology is become
The important means of high satellite mobile communication system handling capacity.Multiple-input and multiple-output (Multiple Input Multiple
Output, MIMO) technology by introduce Spatial Dimension, can be greatlyd improve under conditions of not increasing bandwidth and transmission power
Power system capacity, therefore, the handling capacity that satellite communication system how is improved using MIMO technology have become an important research heat
Point.
Invention content
Conventional polar modulator technology is exactly extended to defend by the purpose of the present invention more from single satellite terrestrial mobile communication system
Star land mobile communication system, referred to as broad sense polarization modulation (Generalized Polarized Modulation, GPMod) skill
Art, to solve the problems, such as that satellite communication transmission rate is low.
Technical scheme is as follows：
Consider a land mobile multi-satellite communication systems, satellite end and terrestrial mobile terminal are provided with a dual polarization day
Line (left-hand circular polarization LHCP/ right-handed circular polarization RHCP) is the equal of then one 2 × 4 MIMO satellites letter by taking double satellites as an example
Road.The channel model of land mobile satellite communication system is represented byWherein WithObey being uniformly distributed for (0,2 π)；AmplitudeClothes
From logarithm normal distribution,Rayleigh distributed.
Land mobile multi-satellite communication broad sense polarization modulator approach based on dual polarized antenna, sets the satellite communication system
In every satellite be provided with a dual polarized antenna, be used for transmission every group be m bits digital signal；Assuming that having N satellite, then
The transmission rate of system is m=log2M+N, M are order of modulation；
It is characterized in that, the modulator approach includes the following steps：
S1, pretreatment：
By the m=log of transmission2M+N bit informations are divided into two parts, preceding log2M-bit is mapped for APM symbols, and
APM symbol code books are：
N-bit is used to select the polarization mode RHCP/LHCP of every transmitting antenna afterwards；
S2, polarized spatial modulation：
According to S1's as a result, every group of m bit data is mapped as polarization vector c and APM symbol by broad sense polarization modulation
s；
S3, modulated according to following formula after signal：
Y=Hcs+n
Wherein, H is satellite channel matrix, and c is polarization vector and its element value is [0,1], and n is white Gaussian noise.
The necessary day space of lines required by MIMO theories cannot be provided due to single satellite communication system, that is to say, that in list
In satellite communication system, the correlation between subchannel is extremely strong, is unfavorable for the implementation of MIMO technology.In satellite communication system
Every satellite is generally only equipped with a transmitting antenna, therefore transmission rate is extremely low.In order to solve the phase between satellite subchannel
The strong problem of closing property, poliarizing antenna (Polarized Antenna) technology are come into being, since the technology is by antenna orthogonal energy
The strong problem of correlation between subchannel is efficiently solved, to which existing MIMO technology can be effectively logical with land mobile satellite
Letter system is combined to improve the handling capacity of system.It is strongly limited since the number of antennas in single satellite communication system is limited
The transmission rate of satellite communication system, in order to solve this problem, the present invention are proposed polarization modulation (Polarized
Modulation, PMod) technique extension is applied in dual polarization land mobile multi-satellite communication systems, referred to as broad sense polarized spatial
(Generalized Polarized Spatial Modulation, the GPMod) technology of modulation, can effectively improve the biography of system
Defeated rate.
Beneficial effects of the present invention are：The present invention utilizes Spatial Dimension and traditional amplitude phase modulation (Amplitude
And Phase Modulation, APM) symbol transmission information bit, the transmission rate of system is effectively raised, in transmitting work(
In the case of rate is identical, the transmission rate of the system is m=log2M+N, and the transmission rate of legacy system is m=log2M.Therefore
Compared with traditional design, transmission rate of the invention improves G=(log2M+N)/(log2M)。
Description of the drawings
Fig. 1 is the emitting structural schematic diagram of broad sense polarization modulation of the present invention.
Fig. 2 is the BER performance simulation figures of the double satellite broad sense polar-modulation systems of dual polarization land mobile of the present invention.
Specific implementation mode
The present invention is described in detail with reference to the accompanying drawings and detailed description, so as to those skilled in the art
More fully understand the present invention.Requiring particular attention is that in the following description, when known function and the detailed of design are retouched
When stating the main contents that perhaps can desalinate the present invention, these descriptions will be ignored herein.
Embodiment
As shown in Figure 1, this example schematically shows the CENERALIZED POLAR based on the more satellite MIMO communication systems of dual polarization land mobile
Change the basic framework of spatial modulation emitting structural, it can be seen that compared with traditional polar-modulation system model, which is sending out
Penetrating end has more transmitting antennas and all activation, and then it is next to choose a kind of polarization mode (LHCP/RHCP) for every transmitting antenna
Transmitted bit information can effectively improve the transmission rate of system.
This example is the double satellite MIMO communication systems of a dual polarization land mobile, and every satellite and land mobile station are matched
There are a dual polarized antenna, i.e. Nt=4, Nr=2.Choice of modulation exponent number is quadrature phase shift keying (BPSK) modulation system of M=2,
Then the transmission rate of the system is：M=log2(M)+2.The preceding log of broad sense polar-modulation system2(M) bit is used for traditional APM
Symbol maps, the polarization mode selection of latter two bit transmitting antenna on two satellites.System model is at this time：
Wherein, H is satellite channel matrix, and c is polarization vector and its element value is [0,1], and n is white Gaussian noise.
More specifically, Nt=4, NrBit map such as the following table 1 institute of the lower broad sense polar modulation scheme of=2, M=2 configuration
Show：
The bit map of 1 broad sense polar modulation scheme of table
| Input bit | APM symbols | 1 polarization mode of satellite | 2 polarization mode of satellite | Transmission vector |
| 000 | +1 | LHCP | LHCP | [+1,0,+1,0]T |
| 001 | +1 | LHCP | RHCP | [+1,0,0,+1]T |
| 010 | +1 | RHCP | LHCP | [0,+1,+1,0]T |
| 011 | +1 | RHCP | RHCP | [0,+1,0,+1]T |
| 100 | -1 | LHCP | LHCP | [-1,0,-1,0]T |
| 101 | -1 | LHCP | RHCP | [-1,0,0,-1]T |
| 110 | -1 | RHCP | LHCP | [0,-1,-1,0]T |
| 111 | -1 | RHCP | RHCP | [0,-1,0,-1]T |
Simulation result is shown in that Figure of description 2, Fig. 2 give polarized spatial modulation technique of the present invention in land mobile satellite
BER performances in MIMO communication system, it can be seen that：In the case of high SNR, polarized spatial modulating system of the invention have compared with
Good BER performances.
In summary：The present invention, which expands polar modulation technology, to be applied in the more satellite MIMO communication systems of land mobile,
In the case where ensureing BER performances, the transmission rate of system can be effectively improved.
Claims (1)
- The modulator approach 1. the land mobile multi-satellite communication broad sense based on dual polarized antenna polarizes, sets in the satellite communication system Every satellite is provided with a dual polarized antenna, is used for transmission the digital signal that every group is m bits；Assuming that there is N satellite, it is then The transmission rate of system is m=log2M+N, M are order of modulation；It is characterized in that, the modulator approach includes the following steps：S1, pretreatment：By the m=log of transmission2M+N bit informations are divided into two parts, preceding log2M-bit is mapped for APM symbols, and APM is accorded with Number is originally：N-bit is used to select the polarization mode RHCP/LHCP of every transmitting antenna afterwards；S2, polarized spatial modulation：According to S1's as a result, every group of m bit data is mapped as polarization vector c and APM symbol s by broad sense polarization modulation；S3, modulated according to following formula after signal：Y=Hcs+nWherein, H is satellite channel matrix, and c is polarization vector and its element value is [0,1], and n is white Gaussian noise.
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| CN201810332415.7A CN108540182A (en) | 2018-04-13 | 2018-04-13 | Land mobile multi-satellite communication broad sense polarization modulator approach based on dual polarized antenna |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1926783A (en) * | 2003-07-31 | 2007-03-07 | 摩托罗拉公司 | Polarization state techniques for wireless communications |
| CN106712819A (en) * | 2017-02-21 | 2017-05-24 | 电子科技大学 | High-spectrum-efficiency GSM method |
| US20170338874A1 (en) * | 2016-04-02 | 2017-11-23 | University Of Notre Dame Du Lac | Linear combinations of transmit signals by a receiver |
-
2018
- 2018-04-13 CN CN201810332415.7A patent/CN108540182A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1926783A (en) * | 2003-07-31 | 2007-03-07 | 摩托罗拉公司 | Polarization state techniques for wireless communications |
| US20170338874A1 (en) * | 2016-04-02 | 2017-11-23 | University Of Notre Dame Du Lac | Linear combinations of transmit signals by a receiver |
| CN106712819A (en) * | 2017-02-21 | 2017-05-24 | 电子科技大学 | High-spectrum-efficiency GSM method |
Non-Patent Citations (1)
| Title |
|---|
| POL HENAREJOS ET AL.: "Dual Polarized Modulation and Reception for Next Generation Mobile Satellite Communications", 《IEEE》 * |
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Application publication date: 20180914 |