CN103795495B - Asymmetric communication method and device - Google Patents
Asymmetric communication method and device Download PDFInfo
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Abstract
The invention discloses a kind of asymmetric communication method and device, in asymmetric communication sending method, including：Channel coding is carried out to multiline message data；Information data after being encoded to multiplex (MUX) carries out framing spread spectrum operation.In asymmetric communication dispensing device, including：Channel coding module, inter-area traffic interarea waiting for transmission to multichannel carries out channel coding；Multiple connection module, the multiline message data flow framing after channel is encoded is transmitted into after having fixed frame length and the frame data stream of form, and segmented spread spectrum and bandpass modulation all the way.The asymmetric transmission more than two-way information data is realized by using the present invention, and the transmission requirement of the higher traffic symbols of security requirement can be met.
Description
Technical field
The invention belongs to communication technical field, it is related to a kind of asymmetric communication method and apparatus, more particularly to one kind is used for
Transmit the asymmetric communication method and apparatus that Information Security requires higher.
Background technology
In asymmetric communication, UQPSK technologies are generally used.As shown in figure 1, UQPSK technologies are modulated using PSK, PSK is adjusted
The signal space of system is a two-dimensional quadrature space, includes two mutually orthogonal components, wherein ψ1(t)=cos ω0T, is same
Phase component, ψ2(t)=sin ω0T, is quadrature component.Therefore, UQPSK technologies at this stage can the different letter of simultaneous transmission two-way
Breath.The data flow of two-way information can have different bit rates, enter respectively in incoherent two-way independent information data flow
Row transmission, and the power proportions ρ that the data of the two-way information stay in the whole deposit of faith is can adjust, therefore, for inhomogeneity
The transmission of type information nearly all uses non-equilibrium QPSK (UQPSK) technology.
But, because UQPSK only has two independent passages, therefore limit can be while carry in asymmetric transmission
Information data type, bandwidth configuration, so as to influence the design of communication system, can not farthest meet communication system
The design object of system.
The content of the invention
The present invention provides following at least one advantages to solve at least one above-mentioned problem and/or deficiency, accordingly
There is provided a kind of asymmetric communication method and apparatus.
On the one hand, in embodiments of the present invention there is provided a kind of asymmetric communication dispensing device, including：Channel coding mould
Block, inter-area traffic interarea waiting for transmission to multichannel carries out channel coding；
Multiple connection module, the multiline message data flow framing after channel is encoded is into all the way with fixed frame length and form
Frame data stream, and it is segmented spread spectrum and bandpass modulation after be transmitted.
On the other hand, in embodiments of the present invention there is provided a kind of asymmetric communication sending method, to multiline message number
According to wherein requiring of a relatively high information data, progress channel coding all the way for Information Security；Compiled according to multiline message data
The ratio of speed after code enters row buffering framing, and being formed all the way has fixed frame length and the frame data stream of form；According to described
The pseudo-code with respective handling gain is chosen in the security requirement of the of a relatively high information of Information Security will to the security
The position of relatively high information data in the frame data stream with fixed frame length and form is asked to be spread；To through group
The spread spectrum frame data stream formed after frame spread spectrum operation carries out bandpass modulation and sent.
Further aspect, in embodiments of the present invention there is provided a kind of asymmetric communication reception device, including：Carrier synchronization
Module, the carrier wave for recovering transmission signal；Acquiring pseudo code module, the pseudo-code for capturing transmission signal；Demodulation module, is utilized
The carrier wave is demodulated to transmission signal, obtains spread spectrum frame according to stream；The spread spectrum frame is divided according to stream using the pseudo-code
Duan Xiekuo；And will be segmented frame data stream progress solution frame acquisition multiline message data after despreading according to frame format；Channel decoding module,
Channel decoding is carried out to the multiline message data and obtains original information data.
By using above-mentioned technical proposal, the present invention not only realizes the asymmetric transmission more than two-way information data, and
And using spread spectrum, the transmission requirement of the higher information data of security requirement is met, meanwhile, the present invention can maximize system
Bandwidth availability ratio, so as to also meet the transmission performance requirement of communication system, further, in information receiving end, utilizes safety
The higher information data of property synchronizes (including carrier synchronization and sign synchronization), also improves synchronous security.
Brief description of the drawings
Fig. 1 is UQPSK multiple connection technology schematic diagrames；
Fig. 2 is asymmetric communication dispensing device schematic diagram in an embodiment of the present invention；
Fig. 3 is multiple connection module diagram of the present invention；
Fig. 4 is asymmetric communication sending method schematic diagram of the present invention；
Fig. 5 for the present invention the deposit of faith shared by different securities relatively high information power proportions ρ and different band
Normalization system bandwidth W/W ' needed under logical modulation system；
Fig. 6 is asymmetric communication reception device schematic diagram of the present invention.
Embodiment
Hereinafter, embodiments of the invention are described more fully with reference to the accompanying, shown in the drawings of the reality of the present invention
Apply example.However, embodiments of the invention can be implemented in many different forms, without should originally be considered limited to arrange herein
The embodiment gone out.Opposite there is provided these exemplary embodiments so that the disclosure is thoroughly, and the scope of the present invention to be filled
Divide and convey to those skilled in the art, in the accompanying drawings, for clarity, the size and relative chi in layer and region can be exaggerated
It is very little.It will omit to the detailed description of known function and structure to avoid the subject matter of fuzzy embodiment.Identical in accompanying drawing
Label is used for representing identical element.
Although it should be understood that term first, second, third, etc. can use herein with describe different elements, component,
Region, layer and/or part, but these elements, component, region, layer and/or part are not limited to these terms.These terms are only
For an element, component, region, layer or part to be differentiated with another element, component, region, layer or part.Therefore, with
The first element, first assembly, first area, first layer or the Part I of lower discussion can be referred to as the second element, the second component,
Second area, the second layer or Part II are without departing from the teachings of the present invention.
Term as used herein is intended merely to describe specific exemplary embodiment, without being intended to the limitation present invention.Such as
As used herein, unless context clear indication, otherwise singulative is intended to include plural form.It will be further understood that
When in the present note use term " comprising " when, show in the presence of statement feature, entirety, step, operation, element, component and/or
Combinations thereof.
The exemplary embodiment of the present invention is described with reference to sectional view herein, the sectional view is the Utopian of the present invention
The schematic diagram of exemplary embodiment (and intermediate structure).Likewise, being for example contemplated as the result of manufacturing technology and/or tolerance
View shape deformation.Therefore, exemplary embodiment of the invention should not be construed as being limited to the region being shown in which
Special shape, but may include, for example, caused by manufacture shape difference.
Unless otherwise defined, otherwise all terms as used herein (including technical term and scientific terminology) have and this hair
The meaning equivalent in meaning that the those of ordinary skill in the bright field is generally understood that.It will be further understood that unless bright here
It is determined that adopted, otherwise term (such as the term defined in general dictionary) should be interpreted as having and above and below relevant technology
The consistent meaning of looking like in text, should not explain their meaning with Utopian or excessively formal meaning.
Fig. 2 is asymmetric communication dispensing device schematic diagram in an embodiment of the present invention.
With reference to Fig. 2, in the asymmetric communication dispensing device, including, channel coding module, while waiting for transmission to multichannel
Inter-area traffic interarea carries out channel coding；Multiple connection module, multiline message data flow framing after channel is encoded into having all the way
After the frame data stream of fixed frame length and form, and segmented spread spectrum and bandpass modulation, it is transmitted into channel.It is asymmetric logical at this
It is individual in T unit, by using multiple connection module, handled while realizing to multiline message data flow, breach UQPSK technologies
Can only simultaneous transmission two-way information data limitation.Also, by having multiline message data manifold after multiple connection into a circuit-switched data
Stream carries out segmentation spread spectrum, improves the high information relatively of security in prime information data flow, and ensure that the security is relatively high
Information air filter ratio shared in the whole deposit of faith and system bandwidth weight, improve bandwidth availability ratio.
In above-mentioned channel coding module, the characteristic and content of information that can be entrained by inter-area traffic interarea waiting for transmission
Using different channel coding methods, so as to reduce the bit error rate, the reliability that inter-area traffic interarea is transmitted in the channel is improved.Example
Such as, adoptable channel coding technology can be RS codings, convolutional code, Turbo code etc..And the inter-area traffic interarea that can be carried out simultaneously
Way it is unrestricted, can be for all the way also can be to multichannel, in the present embodiment, to overcome UQPSK technologies to transmission way
It can be more than three tunnels or three tunnels to allow the way combed simultaneously in limitation, the module.
Fig. 3 is multiple connection module diagram in above-described embodiment.
With reference to Fig. 3, in multiple connection module, including framing module, segmentation spread spectrum module, bandpass modulation module.In framing mould
In block, the information data after the multiplex (MUX) coding produced to channel coding module, wherein requiring phase all the way for Information Security
To high information data, handled, so that being formed all the way has fixed frame length and the frame data stream of form.In the present embodiment
In, the framing module is entered row buffering framing using following methods and operated：
1) multiline message data flow is entered into row buffering respectively；
2) according to speed R1, R2, Ri ... Rn difference slave phases after the frame length LEN_Fi and multiline message data encoding per road
Read in the buffering answered Position data be put into frame the 1st, 2, i ... n parts, wherein, i represents the way of n roads inter-area traffic interarea；
3) the Rn speed rates by the data flow after framing with R1+R2+Ri+ ....
The frame data stream frame length and frame format formed through framing module is fixed, so as to ensure that the week of frame in frame data stream
Phase property.
Spread spectrum module is segmented, frame data stream is spread.Different from being spread to whole frame data stream, the module can
According to transmission limitation, spread spectrum operation only can be carried out to certain section in whole frame data stream.For example, to ensure information data transmission
Security, to the location in frame data stream is spread compared with Gao Mou roads information data relative to security requirement.
The selection of the spreading code used during to spread spectrum is the result of a balance, and this balance is relative for Information Security
Balance between bandwidth needed for the security and system of high information.Because the raising of Information Security means transimission power
Improve, therefore, band needed for the power proportions ρ and system of the whole deposit of faith shared by the balance namely security high information relatively
Balance between wide W.For relatively sharp statement the present embodiment, it is assumed here that the information data of the second tunnel transmission is pacified for information
Full property requires of a relatively high information, then the processing gain for the spreading code chosen is GpIt is whole shared by high information relative with security
Relation between the power proportions ρ of the individual deposit of faith is：
Therefore, if by balance, determining that the power proportions that Information Security high information relatively accounts for this deposit of faith are ρb,
The spreading code then chosen should have
Processing gain.
Meanwhile, in order to improve the correlation being spread across in different frame between the data flow of position section, to being spread across position section
Multiple information bits, i.e., Information Security requirement high information bit relatively in institute's framing, using same short pseudo-code sequence spread spectrum simultaneously
It is inapplicable, a kind of new spread spectrum mode is employed in the present embodiment：Using a long pseudo-code sequence, to being spread across position in each frame
All information of section are spread spectrum, i.e., related to each information bit for being spread across position section with the different sections of long pseudo-code sequence.
, should be as follows in the calculating process of the processing gain of spreading code due to the spread spectrum mode more than：
Wherein, GpFor the processing gain of spreading code, RchFor pseudo-code spreading rate, R is that Information Security requires relatively high
The speed of information, N is the Information Security requirement digit of high information in institute's framing relatively.
Bandpass modulation module, bandpass modulation is carried out to the multiplexing data stream after segmentation spread spectrum.For employing framing module
With segmentation spread spectrum module, in the asymmetric transmission to be realized of the present embodiment, breaching UQPSK technologies can only be adjusted using QPSK
The limitation of system, in the bandpass modulation module, can according to transmission requirement use different modulation systems, such as 8PSK, QPSK,
MASK etc..So as to be sent to channel by a certain character representation of base-band information carrier wave, and by the carrier wave containing base-band information
In, it is achieved that the integration transmission of information.
Fig. 4 is asymmetric communication sending method schematic diagram in another embodiment of the present invention.
With reference to Fig. 4, in step 401, channel coding is carried out to multiline message data, the channel coding step is referred to
State the operation that channel coding module is carried out in embodiment.In step 402, the information data after being encoded to multiplex (MUX) is carried out
Framing spread spectrum operation, the framing spread spectrum operation can further comprise：Framing operation indicated by step 4021, step 4022 are signified
Show segmentation spread spectrum operation and step 4023 indicated by bandpass modulation operation, wherein, step 4021,4022,4023 pairs it is defeated
The operation that the data entered are carried out respectively refers to framing module in above-described embodiment, segmentation spread spectrum module and bandpass modulation mould
Block.Data flow after being handled through step 402 can be sent directly into information and be transmitted.
In the above-described embodiments, by asymmetric transmission process, security to security high information relatively and
During being weighed between bandwidth W needed for system, because the raising of Information Security means the raising of transimission power, because
This, between bandwidth W needed for the power proportions ρ and system of the whole deposit of faith shared by the balance namely security high information relatively
Balance.
Assuming that using the bar of BPSK, QPSK, 8PSK bandpass modulation technology respectively with a width of W ' needed for transmission other information
Under part, with a width of needed for system：
The normalization of system bandwidth needed for being given in Fig. 5 under each modulation system is represented.Give and use in Fig. 5
The normalization of system bandwidth needed for UQPSK technologies is represented.From figure 5 it can be seen that when the requirement to ρ is relatively small, adopting
With the method for the invention and select QPSK or 8PSK modulation techniques can be significantly reduced relative to UQPSK technologies needed for system band
It is wide.
Fig. 6 is asymmetric communication reception device schematic diagram in the embodiment of the present invention.
Corresponding with dispensing device with reference to Fig. 6, the reception device in receiving terminal, this implementation is used and dispensing device phase
Inverse process is handled, to recover the information data of transmitting terminal.In the asymmetric communication reception device, carrier synchronization mould
Block, acquiring pseudo code module, demultiplex connection module, channel decoding module.
With further reference to Fig. 6, carrier synchronization module and acquiring pseudo code module, for being recovered in receiving terminal with transmitting signal
Synchronous carrier wave and pseudo-code, so as to realize the demodulation despreading to signal, this is the pass that receiving terminal realizes asymmetrical information transmission
Key.It may be noted that be a little that what carrier synchronization was utilized is the Information Security requirement high information relatively after despreading；And pseudo-code
The synchronous pseudo-code clock extracted is the clock for spreading frame data stream, and the baseband waveform after demodulation can be carried out using this clock
Relevant detection.So the security of carrier synchronization and sign synchronization is also because of Information Security requirement high Information Security relatively
Improve and be improved.
Connection module is demultiplexed, it is corresponding with above-mentioned multiple connection module, for handling receive information, and then recover multichannel
Information data data flow.In the multiple connection module, the carrier wave recovered using carrier synchronization module is entered to the information received
Row demodulation, the demodulation operation is corresponding with the modulation that transmitting terminal is carried out, so that recovered by demodulation has framing mould in transmitting terminal
The Framed Data stream that block and segmentation spread spectrum module are produced.It is first due to having carried out segmentation spread spectrum in transmitting terminal for Framed Data stream
The frequency expansion sequence gone out first with acquiring pseudo code module recovery carries out segmentation despreading, so as to recover the original Framed Data of no spread spectrum
Stream.The original Framed Data stream carries out solution frame according to the frame format of transmission, and then can produce and transmitting terminal way identical multichannel
Information data.In the preferred embodiments of the present invention, for foregoing segmentation de-spreading operation, to make capturing carrier and carrier wave with enjoyment
The benefit that the signal quality that spread spectrum is brought improves, segmentation despreading is carried out before relevant detection is carried out to information.
Channel decoding module, the multiline message data to generation carry out channel decoding respectively.Corresponding to channel coding module,
By using corresponding decoding algorithm, and then recover original multiline message data.
Although the present invention has shown and described with reference to the particular embodiment of the present invention, those skilled in the art will
Understand：In the case where not departing from the spirit and scope of the present invention being defined by the claims, form can be made wherein and thin
Various changes in terms of section.
Claims (6)
1. a kind of asymmetric communication sending method, it is characterised in that including：
Channel coding is carried out to multiline message data；
Information data after being encoded to multiplex (MUX) carries out framing spread spectrum operation；
The framing spread spectrum operation includes：
Row buffering framing is entered according to the ratio of the speed after multiline message data encoding, frame data stream all the way is formed；
Position of the security requirement high information data relatively in the frame data stream is spread；
Bandpass modulation is carried out to the spread spectrum frame data stream formed after framing spread spectrum operation and sent；
The step of buffering framing, includes：
Multiline message data flow is entered into row buffering respectively；
According to the speed Ri after the frame length LEN_Fi of multiline message data flow and multiline message data channel coding, read respectivelyPosition data are put into the i-th section of frame, and i represents the way of n roads inter-area traffic interarea；
The Rn speed rates by the data flow after framing with R1+R2+Ri+ ...；
The multiline message data are at least three tunnels.
2. method as claimed in claim 1, it is characterised in that：Spreading code is chosen according to following formula to be spread,
<mrow>
<msub>
<mi>G</mi>
<mi>p</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<mi>&rho;</mi>
<mrow>
<mo>(</mo>
<mi>R</mi>
<mn>1</mn>
<mo>+</mo>
<mi>R</mi>
<mn>2</mn>
<mo>+</mo>
<mi>G</mi>
<mi>p</mi>
<mi>R</mi>
<mi>i</mi>
<mo>+</mo>
<mo>...</mo>
<mi>R</mi>
<mi>n</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>R</mi>
<mi>i</mi>
</mrow>
</mfrac>
</mrow>
Wherein, GpFor the processing gain after being spread through spreading code；ρ is that the security high information data relatively accounts for whole information
Overall power proportions.
3. a kind of asymmetric communication dispensing device, it is characterised in that including：
Channel coding module, inter-area traffic interarea waiting for transmission to multichannel carries out channel coding；
Multiple connection module, multiline message data flow framing after channel is encoded is into the frame all the way with fixed frame length and form
It is transmitted after data flow, and segmented spread spectrum and bandpass modulation；
The multiple connection module includes：Framing module, segmentation spread spectrum module, bandpass modulation module,
The framing module, row buffering framing is entered according to the ratio of the speed after multiline message data encoding, forms frame number all the way
According to stream；
The segmentation spread spectrum module, expands position of the security requirement high information data relatively in the frame data stream
Frequently；
The bandpass modulation module, bandpass modulation is carried out to the spread spectrum frame data stream after segmented spread spectrum module；
The buffering framing of the multiple connection module includes：
Multiline message data flow is entered into row buffering respectively；
According to the speed Ri after the frame length LEN_Fi of multiline message data flow and multiline message data channel coding, read respectivelyPosition data are put into the i-th section of frame, and i represents the way of n roads inter-area traffic interarea；
The Rn speed rates by the data flow after framing with R1+R2+Ri+ ...；
The channel coding module can be to carrying out channel coding more than 3 tunnel information datas.
4. dispensing device as claimed in claim 3, it is characterised in that：The segmentation spread spectrum module determines spreading code according to following formula,
<mrow>
<msub>
<mi>G</mi>
<mi>p</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<mi>&rho;</mi>
<mrow>
<mo>(</mo>
<mi>R</mi>
<mn>1</mn>
<mo>+</mo>
<mi>R</mi>
<mn>2</mn>
<mo>+</mo>
<mi>G</mi>
<mi>p</mi>
<mi>R</mi>
<mi>i</mi>
<mo>+</mo>
<mo>...</mo>
<mi>R</mi>
<mi>n</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>R</mi>
<mi>i</mi>
</mrow>
</mfrac>
</mrow>
Wherein, GpFor the processing gain after being spread through spreading code；ρ is that the security high information data relatively accounts for whole information
Overall power proportions.
5. a kind of asymmetric communication reception device, it is characterised in that including：
Carrier synchronization module, the carrier wave for recovering transmission signal；
Acquiring pseudo code module, the pseudo-code for capturing transmission signal；
Demodulation module, is demodulated using the carrier wave to transmission signal, obtains spread spectrum frame data stream；Using the pseudo-code to institute
State spread spectrum frame data stream and carry out segmentation despreading；And will be segmented frame data stream progress solution frame acquisition multichannel letter after despreading according to frame format
Cease data；The i-th section of the frame hasPosition data, wherein, LEN_Fi is multiline message data
The frame length of stream, R is the speed after multiline message data channel is encoded, and i represents the way of n roads inter-area traffic interarea；The multichannel
Information data is at least 3 tunnels；
The multiline message data are carried out channel decoding and obtain original information data by channel decoding module.
6. reception device as claimed in claim 5, it is characterised in that the demodulation module is segmented before coherent detection is carried out
Despreading.
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