CN108206798A - A kind of communication means for inhibiting adjacent transmitters interference - Google Patents
A kind of communication means for inhibiting adjacent transmitters interference Download PDFInfo
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- CN108206798A CN108206798A CN201611184277.XA CN201611184277A CN108206798A CN 108206798 A CN108206798 A CN 108206798A CN 201611184277 A CN201611184277 A CN 201611184277A CN 108206798 A CN108206798 A CN 108206798A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
-
- 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
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation
Abstract
The invention discloses a kind of communication means for inhibiting adjacent transmitters interference, and applied to the wireless communication system for including three communication nodes N1, N2 and N3, wherein N1 emits echo signal to N2, and the signal of N3 transmittings interferes the receiver of N2.By designing the signal format of specific N1 echo signals transmitter and N3 interference signal transmitters and using nonlinear interference elimination method in N2 receivers so that receiver effectively inhibits interference, improves signal demodulation quality.
Description
Technical field
The present invention relates to a kind of modulation of communication system, demodulation method and interference elimination methods, and in particular to a kind of inhibition phase
The technology of adjacent transmitter interference, belongs to wireless communication field.
Background technology
In recent years, the frequency spectrum resource in wireless communication becomes more and more rare, how to efficiently reduce the interference in system,
Data are accurately transmitted at high speed, so as to improve the spectrum efficiency of system and power system capacity, become a weight of wireless communication research
Want target.It is deposited in case of interferers in communication link, if it is possible to effectively inhibit or eliminate interference, then can significantly improve
The communication quality and spectrum efficiency of system.Existing interference cancellation techniques use linear process mode mostly.Such as：Using wave beam into
The receiver for being equipped with multiple antennas is upwardly formed zero gain point by shape technology in disturber；Or using method for eliminating serial interference,
Interference signal is first demodulated, then rebuild interference signal and cuts it from reception signal.Linear disturbance, which is eliminated, usually to be needed
Pay the cost of frequency spectrum resource or space resources.
Invention content
It is an object of the invention to propose a kind of technology and system for inhibiting adjacent transmitters interference.It is specific by designing
The signal format of echo signal transmitter and interference signal transmitter and in receiver using nonlinear interference elimination side
Method can cause receiver to effectively inhibit interference, improve signal demodulation quality.
Technical solution provided by the invention is as follows：
A kind of communication means for inhibiting adjacent transmitters interference, applied to the nothing for including three communication nodes N1, N2 and N3
Line communication system, wherein N1 emit echo signal to N2, and the signal of N3 transmittings interferes the receiver of N2, passes through following sides
Method inhibits the interference：N1 emits the signal Jing Guo digital modulation；And signal is first carried out MPSK (multiple phase-shift keying) and adjusted by N3
Then system only transmits phase value on the Q roads of baseband modulation, zero is transmitted on I roads in the phase value of imaginary part transmission MPSK；
The processing of following steps is carried out to N2 received signals：
1) the docking collection of letters number carries out a down coversion, obtains baseband I, Q roads signal；
2) I, Q roadbed band signal input equalizer carry out interference signal component balanced；
3) signal that step 2) obtains is multiplied by the mpsk signal order of modulation M of N3 transmittings, then the index using e the bottom of as is taken to transport
It calculates；
4) natural logrithm and phase of the absolute value of signal obtained by step 3) are sought, and is formed respectively as real and imaginary parts
One complex signal；
5) equilibrium is carried out to the complex signal that step 4) obtains, then carries out signal demodulation, obtain information bit.
In the above method, the information bit of communication node N1 transmittings is by digital modulation, such as QAM (quadrature amplitude modulation)
Modulation, modulated baseband signal plural number xiIt represents, wherein i represents the serial number of symbol.
The signal of communication node N3 transmittings is using MPSK (multiple phase-shift keying) modulation system, if i-th of symbol-modulated
Phase afterwards is θi, then baseband transmission signal is imaginary number, and imaginary part is the phase of MPSK modulation, is expressed as：
Ii=j θi,
WhereinM is order of modulation, k=0,1 ..., M-1.
Communication node N2 received signals obtain baseband signal y after first passing around step 1) down coversioni, can be expressed as：
yi=hxxi+hIjθi+ni
Wherein hxRepresent that echo signal undergoes the parameter of channel, hIRepresent that interference signal undergoes the parameter of channel, niTable
Show noise.
Assuming that the receiver known target signal of N2 and the channel parameter of interference signal, in step 2) to baseband signal yiInto
Existing method, such as zero forcing equalization method may be used in row equilibrium, i.e., with the channel parameter for receiving signal divided by interference channel, obtains
To signal be expressed as：
The mpsk signal order of modulation M that step 3) is emitted with N3 is multiplied by the signal that step 2) obtains, and obtained signal represents
For：
To signal ri,2The exponential function using e as the truth of a matter is taken, obtained signal is expressed as：
Due to M θi=2k π (k=0,1,2 ..., M-1), therefore haveHave：
Step 4) is to the complex signal r obtained by step 3)i,3Absolute value take natural logrithm, have：
A=ln | ri,3|
And seek complex signal ri,3Phase, method can use the real part divided by imaginary part of the complex signal, then negate tangent
Function obtains：
A complex signal is formed using the above results as real and imaginary parts：
Wherein m is arbitrary integer.
The complex signal r that step 5) obtains step 4)i,4Equilibrium is carried out, obtained signal is expressed as：
To signal ri,5Signal demodulation is carried out, obtains information bit.For example, by using maximum-likelihood demodulation method, that is, find and close
Suitable transmitting symbol xiAnd integer m so that xiWith ri,5Euclidean distance it is minimum.
Beneficial effects of the present invention：It is special by designing the present invention provides a kind of method for inhibiting adjacent transmitters interference
Fixed echo signal transmitter and the signal format of interference signal transmitter and receiver using it is nonlinear interference eliminate
Method can cause receiver to effectively inhibit interference, improve signal demodulation quality.
Description of the drawings
Fig. 1 present invention inhibits the technology schematic diagram of wireless communication system that adjacent transmitters are interfered.
The schematic diagram of communication node N2 in wireless communication system shown in Fig. 2 Fig. 1
Specific embodiment
The present invention is illustrated in further detail below in conjunction with the accompanying drawings, the range of but do not limit the invention in any way.
As shown in Figure 1, a wireless communication system includes 3 communication nodes：N1, N2 and N3.N1 sends information to N2, N3
For adjacent transmitter, the signal of transmitting interferes the receiver of N3.Receiver N2 is in the target for receiving N1 transmittings
While signal, the interference of N3 transmitting signals is also suffered from.
The information bit of communication node N1 transmittings is modulated by digital modulation, such as QAM (quadrature amplitude modulation), after modulation
Baseband signal plural number xiIt represents, wherein i represents the serial number of symbol.
The signal of communication node N3 transmittings only transmits MPSK using MPSK (multiple phase-shift keying) modulation system in imaginary part
Phase value, such as transmit phase value on the Q roads of baseband modulation, zero transmitted on I roads.If the phase after i-th of symbol-modulated
For θi, then baseband transmission signal is imaginary number, and imaginary part is the phase of MPSK modulation, is expressed as：
Ii=j θi,
WhereinM is order of modulation, k=0,1 ..., M-1.
Communication node N2 docks the collection of letters number and carries out down coversion first, obtains baseband I, Q roads signal；Then by I, Q roadbed band
Signal input equalizer carries out its interference signal component balanced；Obtained signal is multiplied by the mpsk signal modulation order of N3 transmittings
Number M, then take the exponent arithmetic using e the bottom of as；Next, the natural logrithm and phase of the signal absolute value are sought, and respectively as
Real and imaginary parts form a complex signal；Equalizer module is input a signal into again, and equilibrium is carried out to echo signal, it finally will be defeated
Go out signal and carry out symbol demodulation, obtain information bit.As shown in Fig. 2, it specifically includes：
Communication node N2 received signals obtain baseband signal y after down coversioni, can be expressed as：
yi=hxxi+hIjθi+ni
Wherein, hxRepresent that echo signal undergoes the parameter of channel, hIRepresent that interference signal undergoes the parameter of channel, ni
Represent noise.
Assuming that N2 receiver known target signals and the channel parameter of interference signal, receiver is to the reception signal by such as
The processing of lower step：
(1) equilibrium is carried out to the baseband signal received, obtained signal is expressed as：
(2) signal obtained in the previous step is multiplied by with the N3 mpsk signal order of modulation M emitted, obtained signal is expressed as：
(3) exponential function using e as the truth of a matter is taken to signal obtained in the previous step, obtained signal is expressed as：
Due to M θi=2k π (k=0,1,2 ...), therefore haveHave：
(4) natural logrithm is taken to the absolute value of the complex signal obtained by previous step, had：
A=ln | ri,3|
And the phase of complex signal obtained by previous step is sought, method can use the real part divided by imaginary part of the complex signal, then
It negates
Tangent function obtains：
A complex signal is formed using the above results as real and imaginary parts:
Wherein m is arbitrary integer.
(5) equilibrium is carried out to signal obtained in the previous step, obtained signal is expressed as：
Signal demodulation is carried out to signal obtained in the previous step, obtains information bit.For example, by using maximum-likelihood demodulation method,
Find suitable transmitting symbol xiAnd integer m so that xiWith ri,5Euclidean distance it is minimum.
Claims (8)
1. a kind of communication means for inhibiting adjacent transmitters interference, applied to wireless comprising three communication nodes N1, N2 and N3
Communication system, wherein N1 emit echo signal to N2, and the signal of N3 transmittings interferes the receiver of N2, passes through following methods
Inhibit the interference：N1 emits the signal Jing Guo digital modulation；And the signal of transmitting is first carried out MPSK modulation by N3, then only in void
Transmit the phase value of MPSK in portion；The processing of following steps is carried out to N2 received signals：
1) the docking collection of letters number carries out a down coversion, obtains baseband signal；
2) baseband signal input equalizer carries out interference signal component balanced；
3) signal that step 2) obtains is multiplied by the mpsk signal order of modulation M of N3 transmittings, then takes the exponent arithmetic using e the bottom of as；
4) natural logrithm and phase of the absolute value of signal obtained by step 3) are sought, and one is formed respectively as real and imaginary parts
Complex signal；
5) equilibrium is carried out to the complex signal that step 4) obtains, then carries out signal demodulation, obtain information bit.
2. communication means as described in claim 1, which is characterized in that N1 emits the signal of QAM modulation.
3. communication means as described in claim 1, which is characterized in that by i-th of baseband signal plural number x of N1 transmittingsiTable
Show；By the phase θ after i-th of symbol-modulated of N3 transmittingsiIt represents, then its baseband transmission signal is expressed as：Ii=j θi, WhereinM is order of modulation, k=0,1 ..., M-1；So, N2 received signals are in step 1) change under
The baseband signal obtained after frequency is：
yi=hxxi+hIjθi+ni
Wherein, hxRepresent that echo signal undergoes the parameter of channel, hIRepresent that interference signal undergoes the parameter of channel, niIt represents
Noise, i represent the serial number of symbol.
4. communication means as claimed in claim 3, which is characterized in that set the receiver known target signal and interference signal of N2
Channel parameter hxAnd hI, in step 2) to baseband signal yiBalanced, to obtain signal expression is carried out using zero forcing equalization method
For：
5. communication means as claimed in claim 4, which is characterized in that the mpsk signal order of modulation M that step 3) N3 emits
The signal that step 2) obtains is multiplied by, obtained signal is expressed as：
To signal ri,2The exponential function using e as the truth of a matter is taken, obtained signal is expressed as：
Due to M θi=2k π, wherein k=0,1 ..., M-1, therefore haveHave：
6. communication means as claimed in claim 5, which is characterized in that step 4) is to the complex signal r obtained by step 3)i,3's
Absolute value takes natural logrithm, has：
A=ln | ri,3|
With complex signal ri,3Real part divided by imaginary part, then negate tangent function, obtaining its phase is：
A complex signal is formed using a and b as real and imaginary parts：
Wherein m is arbitrary integer.
7. communication means as claimed in claim 6, which is characterized in that the complex signal r that step 5) obtains step 4)i,4Into
Row is balanced, and obtained signal is expressed as：
To signal ri,5Signal demodulation is carried out, obtains information bit.
8. communication means as claimed in claim 7, which is characterized in that step 5) is using maximum-likelihood demodulation method to signal
ri,5Carry out signal demodulation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075627A (en) * | 2021-04-14 | 2021-07-06 | 南京慧尔视智能科技有限公司 | Traffic radar anti-interference method and device used under urban dense traffic flow condition |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653740A (en) * | 2002-05-10 | 2005-08-10 | 德商弗朗霍夫应用研究促进学会 | Transmitting device and receiving device |
| CN101377542A (en) * | 2008-09-19 | 2009-03-04 | 北京航空航天大学 | Method and device for estimating GNSS reflected signal parameter |
| CN102378191A (en) * | 2010-08-13 | 2012-03-14 | 中兴通讯股份有限公司 | Method, system and wireless communication device for conducting auxiliary transmission to adjacent channel |
| WO2012079356A1 (en) * | 2010-12-15 | 2012-06-21 | 刘建 | Interference noise estimation and interference rejection method and system thereof |
| CN102769487A (en) * | 2012-05-28 | 2012-11-07 | 北京大学 | Automatic interference elimination system and method based on multiple receiving antennas |
| CN104519006A (en) * | 2014-12-25 | 2015-04-15 | 北京邮电大学 | OFDM system phase noise elimination method based on orthogonal polarization transmission |
| CN105471803A (en) * | 2015-12-09 | 2016-04-06 | 深圳大学 | Millimeter wave high speed modulation and demodulation system and method based on antenna array |
| CN105530054A (en) * | 2015-12-14 | 2016-04-27 | 武汉邮电科学研究院 | Intensity modulation coherent detection system and method based on ASK (Amplitude Shift Keying) and DBPSK (Differential Binary Phase Shift Keying) |
| CN106230757A (en) * | 2016-08-04 | 2016-12-14 | 成都极比特通信技术有限公司 | FBMC system real number field equalization methods based on precoding |
-
2016
- 2016-12-20 CN CN201611184277.XA patent/CN108206798B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653740A (en) * | 2002-05-10 | 2005-08-10 | 德商弗朗霍夫应用研究促进学会 | Transmitting device and receiving device |
| CN101377542A (en) * | 2008-09-19 | 2009-03-04 | 北京航空航天大学 | Method and device for estimating GNSS reflected signal parameter |
| CN102378191A (en) * | 2010-08-13 | 2012-03-14 | 中兴通讯股份有限公司 | Method, system and wireless communication device for conducting auxiliary transmission to adjacent channel |
| WO2012079356A1 (en) * | 2010-12-15 | 2012-06-21 | 刘建 | Interference noise estimation and interference rejection method and system thereof |
| CN102769487A (en) * | 2012-05-28 | 2012-11-07 | 北京大学 | Automatic interference elimination system and method based on multiple receiving antennas |
| CN104519006A (en) * | 2014-12-25 | 2015-04-15 | 北京邮电大学 | OFDM system phase noise elimination method based on orthogonal polarization transmission |
| CN105471803A (en) * | 2015-12-09 | 2016-04-06 | 深圳大学 | Millimeter wave high speed modulation and demodulation system and method based on antenna array |
| CN105530054A (en) * | 2015-12-14 | 2016-04-27 | 武汉邮电科学研究院 | Intensity modulation coherent detection system and method based on ASK (Amplitude Shift Keying) and DBPSK (Differential Binary Phase Shift Keying) |
| CN106230757A (en) * | 2016-08-04 | 2016-12-14 | 成都极比特通信技术有限公司 | FBMC system real number field equalization methods based on precoding |
Non-Patent Citations (4)
| Title |
|---|
| MIN ZHANG ; LIN BAI ; CHEN CHEN ; JINHO CHOI: ""Analysis of adjacent channel interference in heterogeneous cellular networks"", 《2015 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS & SIGNAL PROCESSING (WCSP)》 * |
| YASUNORI SUZUKI ; SHOICHI NARAHASHI ; TOSHIO NOJIMA: ""Evaluation of non-linear compensation effect of base station power amplifier on adjacent channel interference between different mobile systems"", 《2010 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS》 * |
| 卞宇阳; 马猛; 李斗; 焦秉立: ""同频同时全双工网络干扰分析及消除方法研究"", 《电信网技术》 * |
| 武刚; 胡苏; 陈浩; 李少谦: ""基于并行干扰抵消的OFDM/OQAM系统中的信号检测方法"", 《电子与信息学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075627A (en) * | 2021-04-14 | 2021-07-06 | 南京慧尔视智能科技有限公司 | Traffic radar anti-interference method and device used under urban dense traffic flow condition |
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| CN108206798B (en) | 2020-07-28 |
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