CN103269323A - Multi-user transform domain communicating system and method - Google Patents

Multi-user transform domain communicating system and method Download PDF

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CN103269323A
CN103269323A CN2013102065519A CN201310206551A CN103269323A CN 103269323 A CN103269323 A CN 103269323A CN 2013102065519 A CN2013102065519 A CN 2013102065519A CN 201310206551 A CN201310206551 A CN 201310206551A CN 103269323 A CN103269323 A CN 103269323A
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CN103269323B (en
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胡苏�
武刚
李少谦
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University of Electronic Science and Technology of China
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Abstract

The invention discloses a multi-user transform domain communicating system and method. A regular basic modulation wave form generating method is adopted to generate an original basic module wave form, a perfect autocorrelation sequence is introduced, Kronecker multiplication is conducted on the autocorrelation sequence and the original basic module wave form, and therefore a final basic modulation wave form which has a partially perfect cross-relation feature is obtained. Then, through CCSK modulation of partial circumference circular sections, the circumference circular sections are limited during the CCSK modulation, so that strict orthogonality conditions among communicating signals of each pair of users in the multi-user transform domain communicating system are satisfied, and therefore interference among users during multi-user communicating is completely eliminated, and the performance of the multi-user transform domain communicating system is improved.

Description

A kind of multi-user's transform domain communication system and method
Technical field
The invention belongs to communication technical field, more specifically say, relate to a kind of multi-user's transform domain communication system and method.
Background technology
Continuous growth along with wireless communication needs, the frequency spectrum resource growing tension, there be in various degree idle in the frequency spectrum resource of having authorized simultaneously in time and space, become the new bottleneck of restriction radio communication development, this just requires the future communications system when guaranteeing reliability and validity, the dynamic access capability that also will possess frequency spectrum is to improve frequency spectrum resource utilization rate.Cognitive radio (Cognitive Radio, CR) technology is arisen at the historic moment, its core concept is that the user has learning ability, can with the surrounding environment interactive information, with perception with utilize usable spectrum at this environment space, and restriction and reduce the generation of conflict.Wherein, (Transform Domain Communication System TDCS) with its spectrum utilization, the unique anti-interference and low characteristic of intercepting and capturing flexibly, becomes a kind of important technology of CR technical field to transform domain communication system.
In the TDCS system, in order to take full advantage of idle frequency spectrum resource, the TDCS system is decomposed into a series of separate spectrum to idle frequency range, in conjunction with the random phase maker, produce TDCS system-based modulation waveform, (Circular Cyclic Shift Keying CCSK) modulates signal to be sent the final transmission signal of generation to transmitting terminal by circumference circulation modulation, receiving terminal adopts same way as formation base modulation waveform, will send signal with this and carry out demodulation and recover primary signal.By the way, send signal and have the statistical property that is similar to noise, therefore have lower detection probability (being primarily aimed at unauthorized user).But, still there is deficiency in existing TDCS system: when utilizing the TDCS system to carry out multi-user's system group network, exist in the system and many user is communicated by letter simultaneously, every couple of user will distribute a distinctive pseudo random sequence for generation of basic modulation waveform, since different user between basic modulation waveform no longer satisfy strict orthogonality condition, therefore can produce serious inter-user interference during multi-user communication, increase the error rate of Transform-domain Communication Technology.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of multi-user's transform domain communication system and method are provided, make in multi-user's transform domain communication system and satisfy strict orthogonality condition between every pair of user's communications signal, eliminate inter-user interference, promote the performance of multi-user's transform domain communication system.
For achieving the above object, multi-user's transform domain communication system of the present invention comprises that a plurality of communication users are right, the transmitting terminal that each user is right and receiving terminal include basic modulation waveform generation device, for generation of i, and i=1,2 ..., U the initial basis modulation waveform b that the user is right i, wherein U is that communication user is characterized in that quantity in multi-user's transform domain communication system, described transmitting terminal also comprises:
The perfect autocorrelation sequence generation module of transmitting terminal is for generation of perfect autocorrelation sequence
Figure BDA00003268596800021
, its length L is determined according to actual conditions, and perfect autocorrelation sequence A is sent to transmitting terminal Kronecker multiplication module;
Transmitting terminal Kronecker multiplication module is used for initial basis modulation waveform b iCarry out the Kronecker multiplying with perfect autocorrelation sequence A, obtain final basic modulation waveform
Figure BDA00003268596800022
And send to the CCSK of P-CCSK(part circumference intercycle) modulation module, c iIn h element be:
c i(h)＝a(l)×b i(m),h＝lN+m,0≤l≤L-1,0≤m≤N-1；
The P-CCSK modulation module is used for signal to be sent is adopted final basic modulation waveform c iCarrying out the P-CCSK modulation obtains sending signal and sends the user's of i circumference intercycle ω through transmitting antenna iSatisfy restrictive condition:
ω i ∉ ∪ j = 1 , i ≠ j U ( - N + ω j , N + ω j ) ;
Described receiving terminal also comprises:
The perfect autocorrelation sequence generation module of receiving terminal is for generation of the perfect autocorrelation sequence consistent with transmitting terminal , and perfect autocorrelation sequence A sent to receiving terminal Kronecker multiplication module;
Receiving terminal Kronecker multiplication module is used for initial basis modulation waveform b iCarry out the Kronecker multiplying with perfect autocorrelation sequence A, obtain final basic modulation waveform
Figure BDA00003268596800025
And send to P-CCSK demodulation module, c iIn h element be:
c i(h)＝a(l)×b i(m),h＝lN+m,0≤l≤L-1,0≤m≤N-1；
The P-CCSK demodulation module is used for reception signal and final basic modulation waveform c with reception antenna iCarry out the circular correlation of part circumference, carry out demodulation to received signal, obtain the restoring signal of signal to be sent.
Wherein, random phase sequence P iAdopt pseudo-random phase sequences, the generation method is: produce PRBS pseudo-random bit sequence earlier, the phase mapping device that then it is inputed to the tap of r position obtains corresponding pseudo-random phase sequences P i, tap figure place r determines according to actual conditions.
The present invention also provides a kind of multi-user's transform domain communication method, it is characterized in that may further comprise the steps:
(1), communication user is designated as U to quantity in multi-user's transform domain communication system, i, i=1,2 ..., the transmitting terminal that U user is right and receiving terminal are adopted and are produced final basic modulation waveform in a like fashion respectively, and the generation method of final basic modulation waveform is:
1.1), produce initial basis modulation waveform b i
1.2), generate perfect autocorrelation sequence
Figure BDA00003268596800034
, its length L determines that according to actual conditions each user is to all adopting same perfect autocorrelation sequence;
1.3), with initial basis modulation waveform b iCarry out the Kronecker multiplying with perfect autocorrelation sequence A, obtain final basic modulation waveform , c iIn h element be:
c i(h)＝a(l)×b i(m),h＝lN+m,0≤l≤L-1,0≤m≤N-1；
(2), transmitting terminal adopts final basic modulation waveform c with signal to be sent iCarry out the P-CCSK modulation and send i circumference intercycle ω that the user is right when modulation through transmitting antenna iSatisfy restrictive condition:
ω i ∉ ∪ j = 1 , i ≠ j U ( - N + ω j , N + ω j ) ;
(3), receiving terminal obtains receiving signal by reception antenna, will receive signal and final basic modulation waveform c iCarry out the circular correlation of part circumference, thereby the demodulation that achieves a butt joint and collect mail number obtains the restoring signal of signal to be sent.
Wherein, random phase sequence P iAdopt pseudo-random phase sequences, the generation method is: produce PRBS pseudo-random bit sequence earlier, the phase mapping device that then it is inputed to the tap of r position obtains corresponding pseudo-random phase sequences P i, tap figure place r determines according to actual conditions.
Multi-user's transform domain communication system of the present invention and method, adopt conventional basic modulation waveform generation method to form the initial basis modulation waveform, introducing perfect autocorrelation sequence and initial basis modulation waveform carries out Kronecker and multiplies each other, the final basic modulation waveform that obtains thus has perfectly their cross correlation of part, CCSK by part circumference intercycle modulates again, the circumference intercycle limited when CCSK was modulated, make in multi-user's transform domain communication system and to satisfy strict orthogonality condition between every pair of user's communications signal, thus the inter-user interference when eliminating multi-user communication fully.
Description of drawings
Fig. 1 is transmitting terminal system block diagram in a kind of embodiment of multi-user's transform domain communication system of the present invention;
Fig. 2 is receiving terminal system block diagram in a kind of embodiment of multi-user's transform domain communication system of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described, so that those skilled in the art understands the present invention better.What need point out especially is that in the following description, when perhaps the detailed description of known function and design can desalinate main contents of the present invention, these were described in here and will be left in the basket.
Embodiment
During the work of multi-user's transform domain communication system, exist simultaneously and many user is communicated, the every couple of user is transmitting terminal and receiving terminal each other, the same with prior art, every couple of user can distribute a distinctive random sequence before communication, be that every pair of user's transmitting terminal is identical with the random sequence of receiving terminal, the random sequence difference of different user to using.
Fig. 1 is transmitting terminal system block diagram in a kind of embodiment of multi-user's transform domain communication system of the present invention.As shown in Figure 1, in the present embodiment, transmitting terminal comprises in multi-user's transform domain communication system of the present invention:
Transmitting terminal frequency spectrum sensing module 11 is used for adopting the frequency spectrum perception technology to obtain the external environment condition electromagnetic property, obtains the power spectrum amplitude on the different frequency point, and Frequency point quantity is designated as N.Transmitting terminal frequency spectrum sensing module 11 disposes the electromagnetic signal that reception antenna receives external environment condition.
Transmitting terminal frequency spectrum comparison module 12 compares for the power spectrum amplitude of all Frequency points that will obtain and the power spectrum amplitude thresholding that presets, and makes up the frequency spectrum sequence
Figure BDA00003268596800041
, S (n) wherein, n=0,1 ..., N-1 represents the situation that takies of each Frequency point, if n power spectrum amplitude, represents that this Frequency point is occupied greater than thresholding, setting this Frequency point numerical value S (n) is 0; If the power spectrum amplitude less than thresholding, is represented this Frequency point free time, setting this Frequency point numerical value S (n) is 1.By the power spectrum amplitude relatively, can access the frequency spectrum sequence of being formed by numerical value 0,1, be used for describing external environment condition Frequency point operating position.In multi-user's transform domain communication system, no matter as transmitting terminal or receiving terminal, all users are consistent by frequency spectrum perception with the frequency spectrum sequence that relatively obtains.
Transmitting terminal random sequence generator module 13, for generation of i, i=1,2 ..., the random phase sequence of the transmitting terminal that U user is right
Figure BDA00003268596800042
, wherein U be in multi-user's transform domain communication system communication user to quantity.In actual applications, random phase sequence P iAdopt pseudo-random phase sequences.Produce pseudo-random phase sequences P iConcrete mode be: produce earlier PRBS pseudo-random bit sequence, the phase mapping device that then it is inputed to the tap of r position obtains corresponding pseudo-random phase sequences P i, tap figure place r determines according to actual conditions.When concrete application implementation, the phase mapping device can adopt 2 r-MPSK modulation or other similar fashion are carried out phase mapping.
Transmitting terminal random phase sequence generator module 14 is used for the random phase sequence P that frequency spectrum sequence S that transmitting terminal frequency spectrum comparison module 12 is obtained and transmitting terminal random sequence generator module 13 obtain iPursue the element multiplying, obtain the frequency spectrum random phase sequence B of multi-user's transform domain communication system i=Sdiag (P i).Frequency spectrum random phase sequence B iWaveform mainly for generation of having noise characteristic has low probability of intercept, and can distinguish different users in access mode.
Transmitting terminal inverse Fourier transform module 15 is used for the frequency spectrum random phase sequence B with 14 outputs of transmitting terminal random phase sequence generator module iCarry out inverse Fourier transform and obtain the initial basis modulation waveform b i = { b i ( 0 ) , b i ( 1 ) , · · · , b i ( N - 1 ) } = IFFT { B i } , b iIn n element be:
b i ( n ) = λ Σ k = 0 N - 1 S ( k ) e jm i ( k ) e j 2 πkn N = λ Σ k ∈ Ω C e j m i ( k ) e j 2 πkn N
Wherein, λ is the power normalization factor, Ω CFor numerical value among the frequency spectrum sequence S is 1 element set, the i.e. set of idle frequence point;
Transmitting terminal inverse Fourier transform module 15 is with the initial basis modulation waveform b that obtains iSend to transmitting terminal Kronecker multiplication module 17.
In the present embodiment, transmitting terminal frequency spectrum sensing module 11, transmitting terminal frequency spectrum comparison module 12, transmitting terminal random sequence generator module 13, transmitting terminal random phase sequence generator module 14 and transmitting terminal inverse Fourier transform module 15 are formed transmitting terminal basis modulation waveform generation device, produce the initial basis modulation waveform b of transmitting terminal i, its production method is prior art.
The perfect autocorrelation sequence generation module 16 of transmitting terminal is for generation of perfect autocorrelation sequence , its length L is determined according to actual conditions, and perfect autocorrelation sequence A is sent to transmitting terminal Kronecker multiplication module 17.Perfect autocorrelation sequence is a kind of sequence with desirable circumference auto-correlation function, and namely its circumference auto-correlation function satisfies:
Figure BDA00003268596800054
Wherein, mod represents complementation.
Transmitting terminal Kronecker multiplication module 17 is used for initial basis modulation waveform b iCarry out the Kronecker multiplying with perfect autocorrelation sequence A, obtain final basic modulation waveform
Figure BDA00003268596800061
And send to P-CCSK modulation module 18, c iIn h element be:
c i(h)＝a(l)×b i(m),h＝lN+m,0≤l≤L-1,0≤m≤N-1。
The final basic modulation waveform c that obtains thus iHas perfectly their cross correlation of part.
P-CCSK modulation module 18 is used for the final basic modulation waveform c that adopts transmitting terminal Kronecker multiplication module 17 to obtain signal to be sent iCarry out the CCSK of P-CCSK(part circumference intercycle) modulation obtains sending signal.I the right circumference intercycle of user is designated as ω i, in order to guarantee the strict orthogonal of multi-user communication signal, namely eliminate inter-user interference, restrictive condition need be satisfied in the circumference intercycle that the user is right in multi-user's transform domain communication system:
ω i ∉ ∪ j = 1 , i ≠ j U ( - N + ω j , N + ω j ) .
P-CCSK modulation module 18 sends the transmission signal that modulation obtains through transmitting antenna.
Fig. 2 is receiving terminal system block diagram in a kind of embodiment of multi-user's transform domain communication system of the present invention.As shown in Figure 2, in the present embodiment, transmitting terminal comprises in multi-user's transform domain communication system of the present invention:
Receiving terminal frequency spectrum sensing module 21 is used for adopting the frequency spectrum perception technology to obtain the external environment condition electromagnetic property, obtains the power spectrum amplitude on the different frequency point.In the present embodiment, the perception antenna of receiving terminal frequency spectrum sensing module 21 and P-CCSK demodulation module 28 are used for receiving the receiving antenna multicoupler one cover antenna assembly that sends signal.
Receiving terminal frequency spectrum comparison module 22 is used for making up the frequency spectrum sequence
Figure BDA00003268596800063
Receiving terminal random sequence generator module 23 is for generation of the random phase sequence of the right receiving terminal of i user P i = { e j m i ( 0 ) , e j m i ( 1 ) , · · · , e j m i ( N - 1 ) } .
Receiving terminal random phase sequence generator module 24 is used for the random phase sequence P that frequency spectrum sequence S that receiving terminal frequency spectrum comparison module 22 is obtained and receiving terminal random sequence generator module 23 obtain iPursue the element multiplying, obtain the frequency spectrum random phase sequence B of multi-user's transform domain communication system i=Sdiag (P i).
Receiving terminal inverse Fourier transform module 25 is used for the frequency spectrum random phase sequence B with 24 outputs of receiving terminal random phase sequence generator module iCarry out inverse Fourier transform and obtain the initial basis modulation waveform b i = { b i ( 0 ) , b i ( 1 ) , · · · , b i ( N - 1 ) } = IFFT { B i } , b iIn n element be:
b i ( n ) = λ Σ k = 0 N - 1 S ( k ) e j m i ( k ) e j 2 πkn N = λ Σ K ∈ Ω C e j m i ( k ) e j 2 πkn N
Wherein, λ is the power normalization factor, Ω CFor numerical value among the frequency spectrum sequence S is 1 element set.
Receiving terminal inverse Fourier transform module 25 is with the initial basis modulation waveform b that obtains iSend to receiving terminal Kronecker multiplication module 27.
In the present embodiment, receiving terminal frequency spectrum sensing module 21, receiving terminal frequency spectrum comparison module 22, receiving terminal random sequence generator module 23, receiving terminal random phase sequence generator module 24 and receiving terminal inverse Fourier transform module 25 are formed receiving terminal basis modulation waveform generation device, produce the initial basis modulation waveform b of receiving terminal i
The perfect autocorrelation sequence generation module 26 of receiving terminal is for generation of the perfect autocorrelation sequence consistent with transmitting terminal
Figure BDA00003268596800071
, send to receiving terminal Kronecker multiplication module 27.The perfect autocorrelation sequence of user's centering transmitting terminal and receiving terminal is consistent, and the right perfect autocorrelation sequence of different user is identical.
Receiving terminal Kronecker multiplication module 27 is used for initial basis modulation waveform b iCarry out the Kronecker multiplying with perfect autocorrelation sequence A, obtain final basic modulation waveform
Figure BDA00003268596800072
And send to P-CCSK demodulation module 28, wherein c iIn h element be:
c i(h)＝a(l)×b i(m),h＝lN+m,0≤l≤L-1,0≤m≤N-1。
P-CCSK demodulation module 28 is used for the reception signal of reception antenna and the final basic modulation waveform c of receiving terminal Kronecker multiplication module 27 outputs iCarry out the circular correlation of part circumference, thereby the demodulation that achieves a butt joint and collect mail number obtains the restoring signal of signal to be sent.
When communicating, its communication means comprises by as shown in Figure 1 transmitting terminal and receiving terminal as shown in Figure 2:
Step 1: to being transmitting terminal and receiving terminal distribution random sequence before beginning communication, the random sequence that each user is right has nothing in common with each other the user.
Step 2: transmitting terminal and receiving terminal are adopted and are produced final basic modulation waveform in a like fashion respectively, and the generation method of final basic modulation waveform is:
1., adopt the frequency spectrum perception technology to obtain the external environment condition electromagnetic property, obtain the power spectrum amplitude on the different frequency point, Frequency point quantity is designated as N.
2., the power spectrum amplitude of all Frequency points that will obtain compares structure frequency spectrum sequence with the power spectrum amplitude thresholding that presets
Figure BDA00003268596800073
, S (n) wherein, n=0,1 ..., N-1 represents the situation that takies of each Frequency point, if n power spectrum amplitude, represents that this Frequency point is occupied greater than thresholding, setting this Frequency point numerical value S (n) is 0; If the power spectrum amplitude less than thresholding, is represented this Frequency point free time, setting this Frequency point numerical value S (n) is 1.
3., produce the user to the random phase sequence of i P i = { e j m i ( 0 ) , e j m i ( 1 ) , · · · , e j m i ( N - 1 ) } 。In actual applications, random phase sequence P iAdopt pseudo-random phase sequences.Produce pseudo-random phase sequences P iConcrete mode be: produce earlier PRBS pseudo-random bit sequence, the phase mapping device that then it is inputed to the tap of r position obtains corresponding pseudo-random phase sequences P i, tap figure place r determines according to actual conditions.The phase mapping device can adopt 2 r-MPSK modulation or other similar fashion are carried out phase mapping.
4., the random phase sequence P that 3. the frequency spectrum sequence S that 2. step is obtained and step obtain iPursue the element multiplying, obtain the frequency spectrum random phase sequence B of multi-user's transform domain communication system i=Sdiag (P i), and with frequency spectrum random phase sequence B iCarry out inverse Fourier transform and obtain the initial basis modulation waveform b i = { b i ( 0 ) , b i ( 1 ) , · · · , b i ( N - 1 ) } = IFFT { B i } , b iIn n element be:
b i ( n ) = λ Σ k = 0 N - 1 S ( k ) e j m i ( k ) e j 2 πkn N = λ Σ K ∈ Ω C e j m i ( k ) e j 2 πkn N
Wherein, λ is the power normalization factor, Ω CFor numerical value among the frequency spectrum sequence S is 1 element set.
5., generate perfect autocorrelation sequence
Figure BDA00003268596800084
, its length L determines according to actual conditions, each user is to all adopting same perfect autocorrelation sequence, and with initial basis modulation waveform b iCarry out the Kronecker multiplying with perfect autocorrelation sequence A, obtain final basic modulation waveform c i = { c i ( 0 ) , c i ( 1 ) , · · · , c i ( LN - 1 ) } , c iIn h element be:
c i(h)＝a(l)×b i(m),h＝lN+m,0≤l≤L-1,0≤m≤N-1。
Step 3: transmitting terminal adopts final basic modulation waveform c with signal to be sent iCarry out the P-CCSK modulation and send i circumference intercycle ω that the user is right when modulation through transmitting antenna iSatisfy restrictive condition:
ω i ∉ ∪ j = 1 , i ≠ j U ( - N + ω j , N + ω j ) .
Step 4: receiving terminal obtains receiving signal by reception antenna, will receive signal and final basic modulation waveform c iCarry out the circular correlation of part circumference, thereby the demodulation that achieves a butt joint and collect mail number obtains the restoring signal of signal to be sent.
Although above the illustrative embodiment of the present invention is described; so that those skilled in the art understand the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various variations appended claim limit and the spirit and scope of the present invention determined in, these variations are apparent, all utilize innovation and creation that the present invention conceives all at the row of protection.

Claims (6)

1. multi-user's transform domain communication system comprises that a plurality of communication users are right, and the transmitting terminal that each user is right and receiving terminal include basic modulation waveform generation device, for generation of i, and i=1,2 ..., U the initial basis modulation waveform b that the user is right i, wherein U is that communication user is characterized in that quantity in multi-user's transform domain communication system, described transmitting terminal also comprises:
The perfect autocorrelation sequence generation module of transmitting terminal is for generation of perfect autocorrelation sequence , its length L is determined according to actual conditions, and perfect autocorrelation sequence A is sent to transmitting terminal Kronecker multiplication module;
Transmitting terminal Kronecker multiplication module is used for initial basis modulation waveform b iCarry out the Kronecker multiplying with perfect autocorrelation sequence A, obtain final basic modulation waveform And send to the CCSK of P-CCSK(part circumference intercycle) modulation module, c iIn h element be:
c i(h)＝a(l)×b i(m),h＝lN+m,0≤l≤L-1,0≤m≤N-1；
The P-CCSK modulation module is used for signal to be sent is adopted final basic modulation waveform c iCarrying out the P-CCSK modulation obtains sending signal and sends the user's of i circumference intercycle ω through transmitting antenna iSatisfy restrictive condition:
ω i ∉ ∪ j = 1 , i ≠ j U ( - N + ω j , N + ω j ) ;
Described receiving terminal also comprises:
The perfect autocorrelation sequence generation module of receiving terminal is for generation of the perfect autocorrelation sequence consistent with transmitting terminal
Figure FDA00003268596700014
, and perfect autocorrelation sequence A sent to receiving terminal Kronecker multiplication module;
Receiving terminal Kronecker multiplication module is used for initial basis modulation waveform b iCarry out the Kronecker multiplying with perfect autocorrelation sequence A, obtain final basic modulation waveform
Figure FDA00003268596700015
And send to P-CCSK demodulation module, c iIn h element be:
c i(h)＝a(l)×b i(m),h＝lN+m,0≤l≤L-1,0≤m≤N-1；
The P-CCSK demodulation module is used for reception signal and final basic modulation waveform c with reception antenna iCarry out the circular correlation of part circumference, carry out demodulation to received signal, obtain the restoring signal of signal to be sent.
2. multi-user's transform domain communication system according to claim 1 is characterized in that, described random phase sequence P iAdopt pseudo-random phase sequences, the generation method is: produce PRBS pseudo-random bit sequence earlier, the phase mapping device that then it is inputed to the tap of r position obtains corresponding pseudo-random phase sequences P i, tap figure place r determines according to actual conditions.
3. multi-user's transform domain communication system according to claim 2 is characterized in that, described phase mapping device adopts 2 rPhase mapping is carried out in-MPSK modulation.
4. multi-user's transform domain communication method is characterized in that, may further comprise the steps:
(1), communication user is designated as U to quantity in multi-user's transform domain communication system, i, i=1,2 ..., the transmitting terminal that U user is right and receiving terminal are adopted and are produced final basic modulation waveform in a like fashion respectively, and the generation method of final basic modulation waveform is:
1.1), produce initial basis modulation waveform b i
1.2), generate perfect autocorrelation sequence , its length L determines that according to actual conditions each user is to all adopting same perfect autocorrelation sequence;
1.3), with initial basis modulation waveform b iCarry out the Kronecker multiplying with perfect autocorrelation sequence A, obtain final basic modulation waveform
Figure FDA00003268596700022
, c iIn h element be:
c i(h)＝a(l)×b i(m),h＝lN+m,0≤l≤L-1,0≤m≤N-1；
(2), transmitting terminal adopts final basic modulation waveform c with signal to be sent iCarry out the P-CCSK modulation and send i circumference intercycle ω that the user is right when modulation through transmitting antenna iSatisfy restrictive condition:
ω i ∉ ∪ j = 1 , i ≠ j U ( - N + ω j , N + ω j ) ;
(3), receiving terminal obtains receiving signal by reception antenna, will receive signal and final basic modulation waveform c iCarry out the circular correlation of part circumference, thereby the demodulation that achieves a butt joint and collect mail number obtains the restoring signal of signal to be sent.
5. multi-user's transform domain communication method according to claim 4 is characterized in that, described random phase sequence P iAdopt pseudo-random phase sequences, the generation method is: produce PRBS pseudo-random bit sequence earlier, the phase mapping device that then it is inputed to the tap of r position obtains corresponding pseudo-random phase sequences P i, tap figure place r determines according to actual conditions.
6. multi-user's transform domain communication method according to claim 5 is characterized in that, described phase mapping device adopts 2 rPhase mapping is carried out in-MPSK modulation.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103475438A (en) * 2013-09-25 2013-12-25 电子科技大学 Low-correlation zone sequence design method suitable for cognitive radio environment
CN103501206A (en) * 2013-09-25 2014-01-08 电子科技大学 Quasi-perfect sequence design method suitable for cognitive radio environment
CN105227502A (en) * 2015-08-25 2016-01-06 电子科技大学 A kind of TDCS transmitter, receiver, system and method based on MIMO
CN109714773A (en) * 2019-01-11 2019-05-03 电子科技大学 A kind of sequence sets design method based on optimal clustering algorithm
CN112367133A (en) * 2020-10-28 2021-02-12 西北工业大学 Multi-domain switching communication method based on intelligent decision

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101098218A (en) * 2006-06-27 2008-01-02 中兴通讯股份有限公司 Transmitter and receiver of arbitrary access front signal
US20100142490A1 (en) * 2006-01-20 2010-06-10 Qualcomm Incorporated Method and apparatus for pilot multiplexing in a wireless communication system
CN102340478A (en) * 2011-07-21 2012-02-01 电子科技大学 Transform domain communication system and transmission signal producing method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100142490A1 (en) * 2006-01-20 2010-06-10 Qualcomm Incorporated Method and apparatus for pilot multiplexing in a wireless communication system
CN101098218A (en) * 2006-06-27 2008-01-02 中兴通讯股份有限公司 Transmitter and receiver of arbitrary access front signal
CN102340478A (en) * 2011-07-21 2012-02-01 电子科技大学 Transform domain communication system and transmission signal producing method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GEORGE M等: "Cyclic Code Shift Keying: A Low Probability of Intercept Communication Technique", 《IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS》, vol. 39, no. 3, 31 July 2003 (2003-07-31), XP055034687 *
I. BUDIARJO等: "MIMO TDCS with Extra Embedded Symbol for Higher Data Rates in Overlay Spectrum Sharing System", 《IEEE COMMUNICATIONS SOCIETY WCNC 2009 PROCEEDINGS.》, 31 December 2009 (2009-12-31) *

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