CN106534026A - Data sequence processing method and relevant device - Google Patents
Data sequence processing method and relevant device Download PDFInfo
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- CN106534026A CN106534026A CN201610900649.8A CN201610900649A CN106534026A CN 106534026 A CN106534026 A CN 106534026A CN 201610900649 A CN201610900649 A CN 201610900649A CN 106534026 A CN106534026 A CN 106534026A
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- data sequence
- baseband signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Discrete Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiments of the invention relate to the mobile communication technology field and disclose a data sequence processing method and relevant device wherein the method comprises: receiving the inputted binary data sequence; processing the binary data sequence through the use of a parameter set to generate a baseband signal; setting the work frequency of the baseband signal 2.4GHzISM and the work band width 10MHz wherein the parameter set includes 52 sub-carriers consisting of 48 data sub-carriers and four pilot sub-carriers with a symbol time of 8us and a guard interval of 1.6us. Through the implementation of the embodiments of the present invention, it is possible to reduce the packet loss rate of packets in mobile communication transmission.
Description
Technical field
The present invention relates to mobile communication technology field, more particularly to a kind of data sequence processing method and relevant device.
Background technology
Data are transmitted in units of packet on a communication network.When packet may during communication network transmission
Because of physical circuit failure, equipment fault, routing iinformation or the loss that the reasons such as terminal delay time tolerance limit is less cause packet can be received,
Generally people can i.e. in communication network, lost packet shows packet logical with the ratio table of sent packet with packet loss
Loss situation in letter net.
In mobile communication environment, can there is time delay and ask because of factors such as multipath or Doppler effect when transmitting in packet
Topic, when the propagation delay time of packet is time delay tolerance limit more than receiving terminal to the admissible scope of time delay, then the packet
Packet loss is larger.
The content of the invention
The embodiment of the invention discloses a kind of data sequence processing method and relevant device, can reduce the packet and move
Packet loss in dynamic communication transmission process.
Embodiment of the present invention first aspect discloses a kind of data sequence processing method, including：
The binary data sequence of receives input；
The binary data sequence is carried out processing using parameter sets and generate baseband signal, and the base band letter is set
Number working frequency range 2.4GHz ISM bands and bandwidth of operation 10MHz, wherein described parameter sets include number of sub carrier wave 52, institute
Stating number of sub carrier wave 52 includes 48 data subcarriers and 4 pilot sub-carriers, and symbol time is 8us, and protection interval is
1.6us。
Embodiment of the present invention second aspect discloses a kind of mobile terminal, including：
Data sequence receiving unit, for the binary data sequence of receives input；
Data sequence processing unit, for the data sequence receiving unit is received using parameter sets described two
Binary data sequence carry out process generate baseband signal, and arrange the baseband signal working frequency range 2.4GHz ISM bands and
Bandwidth of operation 10MHz, wherein described parameter sets include number of sub carrier wave 52, and the number of sub carrier wave 52 includes 48 data
Carrier wave and 4 pilot sub-carriers, symbol time are 8us, and protection interval is 1.6us.
In the embodiment of the present invention, the mobile terminal is using parameter sets at the binary data sequence that receives
Manage so as to generate baseband signal.Implement the embodiment of the present invention, the binary data sequence is processed using the parameter sets
The maximum delay tolerance limit of communication system permission can be increased, so as to reduce binary data sequence during communications system transmission
Packet loss.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below by to be used needed for embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, general for this area
For logical technical staff, on the premise of not paying creative work, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of schematic flow sheet of data sequence processing method disclosed in the embodiment of the present invention；
Fig. 1 (a) is a kind of schematic diagram of OFDM modulation principles disclosed in the embodiment of the present invention；
Fig. 2 is a kind of structural representation of mobile terminal disclosed in the embodiment of the present invention；
Fig. 3 is the above-mentioned application interface changing method of a kind of operation disclosed in the embodiment of the present invention based on von Neumann system
Computer system.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is a part of embodiment of the invention, rather than the embodiment of whole.Based on this
Embodiment in bright, the every other enforcement obtained under the premise of creative work is not made by those of ordinary skill in the art
Example, belongs to the scope of protection of the invention.
It should be noted that the term for using in embodiments of the present invention is the mesh only merely for description specific embodiment
, and it is not intended to be limiting the present invention." one of singulative used in the embodiment of the present invention and appended claims
Kind ", " described " and " being somebody's turn to do " are also intended to include most forms, unless context clearly shows that other implications.It is also understood that this
Term "and/or" used herein is referred to and associated any or all possible group that lists project comprising one or more
Close.
The embodiment of the invention discloses a kind of data sequence processing method and relevant device, can reduce the packet and move
Packet loss in dynamic communication transmission process.It is described in detail individually below.
Fig. 1 is referred to, Fig. 1 is a kind of schematic flow sheet of data sequence processing method disclosed in the embodiment of the present invention.Such as
Shown in Fig. 1, the data sequence processing method may comprise steps of.
The binary data sequence of S101, mobile terminal receives input.
S102, the mobile terminal are carried out processing to the binary data sequence using parameter sets and generate baseband signal,
And working frequency range 2.4GHz ISM bands and the bandwidth of operation 10MHz of the baseband signal, wherein described parameter sets bag are set
Enclosed tool carrier number 52, the number of sub carrier wave 52 include 48 data subcarriers and 4 pilot sub-carriers, and symbol time is
8us, protection interval are 1.6us.
The mobile terminal can include operation Android operation system, iOS operating systems, Windows operating system or its
The setting with communication function such as the user equipment of his operating system, such as mobile phone, removable computer, panel computer, unmanned plane
It is standby.
The mobile terminal can gather the binary data sequence by data acquisition equipments such as mikes, then this two is entered
Data sequence processed carries out serial to parallel conversion, so as to the binary data sequence of serial is changed into N number of parallel data, while should
N number of parallel data distributes to N number of different subchannel from after the multiplication of N number of data subcarrier, and N circuit-switched datas are encoded to be mapped to N
Individual compound subsymbol.Referring to the modulation principle shown in Fig. 1 (a), 48 data subcarriers can be respectively { sinw0t,
sin2w0T ... ..., sin48w0T }, it is 48 and 48 parallel data { a with the data subcarrier respectively1,a2... ..., a48Phase
Take advantage of.
Data after the mobile terminal can also be multiplied with N number of data subcarrier to N number of parallel data are carried out
Coding mapping, the wherein embodiment of the present invention can be encoded to data so as to generate using the cyclic convolution coding techniques of K=7
N number of plural subsymbol.N number of plural subsymbol can also be sent into an inverse fast Fourier transform by the mobile terminal
(Inverse Fast Fourier Transformation, IFFT) module, the IFFT modules are for will be this in frequency domain N number of
Complex operator sign reversing is into 2N real number sample value.
The mobile terminal can also be added to Cyclic Prefix before the 2N real number sample value, form the information of cyclic extensions
Code word, the information code word of the cyclic extensions export the baseband signal through parallel serial conversion, digital to analog conversion D/A and low pass filter.
In the present embodiment, symbol time 8us is may be incorporated into, i.e., the time for sending data can be 8us, protect
Interval time 1.6us.Compared to the 802.11a 20MHz bandwidth of Wireless Fidelity (WIreless-Fidelity, wifi), it is identical
Time used by data transfers is double, such as identical data volume, and the originally 802.11a of wifi is sent out come modulated signal with 4us
Go out, it now is possible to modulate transmission with the time of 8us, the time of this modulation is by fast Fourier transform (Fast
Fourier Transformation, FFT) computing protection interval time 6.4us+, 1.6us time it is come, although symbol when
Between increase, but purpose is to increase the time of protection interval, and the 802.11a symbol times of originally wifi are 4us, and protection interval is
0.8us。
Why protection interval time is had？Signal when transmission runs into surrounding objects and reflection can occur (with reference to visible
Light), through multiple reflections signal and through reflection signal time on have time delay, such as in the distance of 300m, Jing
The signal ratio for crossing 5 radiation does not pass through the signal lag of reflection in 5us or so, then in synchronization, except receiving not
There is the direct signal sent under the ecotopia of reflection, also have and receive another segment signal sent out before multiple reflections 5us,
The two signals can be interfered.For avoiding this phenomenon in addition, so introducing this definition of protection interval time, transport in FFT
Waited upper protection interval this period after complete (regarding data is activation as complete) again, and then sent followed by computing, in order to avoid previously sent out
Data interfere with later moment in time through multiple reflections and send over the data for not passing through reflection.
Optionally, the binary data sequence is carried out processing using parameter sets in the mobile terminal and generates baseband signal
Afterwards, the mobile terminal can also be encrypted to the baseband signal and package, and to the baseband signal after encryption and package
Through up-conversion output OFDM signal (Orthogonal Frequency Division Multiplexing,
OFDM).Wherein, the present embodiment can be using symmetric encipherment algorithm DES (English：Data Encryption Standard)、
3DES (English：Triple DES) and IDEA (International Data Encryption
Algorithm, IDEA) etc. AES the baseband signal is encrypted.
Optionally, the mobile terminal can also using binary phase shift keying (Binary Phase Shift Keying,
BPSK) technology, QPSK (Quadrature Phase Shift Keyin, QPSK) technology, quadrature amplitude modulation skill
One kind in art (16Quadrature Amplitude Modulation, 16QAM) and phase quadrature amplitude modulation technology 64QAM
Or several baseband signal up-conversions to after encryption and package are so as to output OFDM ofdm signal.
Optionally, the mobile terminal can also amplify after up-conversion output OFDM ofdm signal
The power of the ofdm signal.
Optionally, the parameter sets also include Physical layer convergence protocol (Physical Layer Convergence
Protocol, PLCP) lead code time 32us.The wherein PLCP includes two long training sequences and two end training sequences, uses
To complete signal detection, automatic growth control, diversity reception, thick frequency are estimated, time synchronized etc..PLCP lead code time 32us can
To refer to the time for having 32us for sending out PLCP lead codes, this time increased one times than the 802.11a standards of wifi, mainly
As the guard time in lead code increases and the increase of FFT operation times.
Wherein, the pilot sub-carrier can be used for channel estimating.
Wherein, the present embodiment can not carry out carrier sense (Carrier Sense Multiple Access to channel
With Collision Detection, CSMA/CD).
It should be noted that the N involved by the present embodiment can be the number 48 of the data subcarrier.
The present embodiment can analyze beneficial effect with mathematical formulae：
If the transfer rate of data is Rb, the number of modulation states of each data subcarrier is M (M systems), then a FFT code
Metamessage amount is log2M, persistent period are T：
The frequency interval of data subcarrier：
Ofdm signal bandwidth：
So as to obtain band efficiency：
The maximum delay that τ is that communication system is allowed is defined, then the coherence bandwidth of system is：
When coherence bandwidth of the signal bandwidth more than channel, the channel is called frequency-selective channel.Frequency selectivity declines
The distortion that falls can cause transmission error code.System allow maximum delay be：
For example, if transfer rate R of datab=6Mbps, and data adopt QPSK modulation techniques, QPSK modulation skills
Corresponding number of modulation states M=4 of art, then the maximum delay of the substitution above formula communication system is 16.67us.
In the method described by Fig. 1, the mobile terminal is using parameter sets to the binary data sequence that receives
Processed so as to generate baseband signal.With the symbol time 4us of 802.11a, the symbol time of this programme is 8us, that is, use 8us
Time sending data.Compared with 802.11a, transfer rate R of databReduce.With reference to said system allow it is maximum when
Prolong formula to can be seen that in the case where number of modulation states M is constant, message transmission rate RbReduce, then the maximum that system is allowed
Delay, τ becomes big.It can be seen that, the method for implementing Fig. 1 descriptions, adopting the parameter sets to carry out process to the binary data sequence can be with
The maximum delay tolerance limit that increase communication system is allowed, so that reduce binary data sequence losing during communications system transmission
Bag rate.
Fig. 2 is referred to, Fig. 2 is a kind of structural representation of mobile terminal disclosed in the embodiment of the present invention.Wherein, Fig. 2 institutes
The mobile terminal for showing can include：
Data sequence receiving unit 201, for the binary data sequence of receives input.
Data sequence processing unit 202, should for what is received to the data sequence receiving unit 201 using parameter sets
Binary data sequence carry out process generate baseband signal, and arrange the baseband signal working frequency range 2.4GHz ISM bands and
Bandwidth of operation 10MHz, the wherein parameter sets include number of sub carrier wave 52, and the number of sub carrier wave 52 includes 48 data subcarriers
With 4 pilot sub-carriers, symbol time is 8us, and protection interval is 1.6us.
The mobile terminal can gather the binary data sequence by data acquisition equipments such as mikes, then this two is entered
Data sequence processed carries out serial to parallel conversion, so as to the binary data sequence of serial is changed into N number of parallel data, while should
N number of parallel data distributes to N number of different subchannel from after the multiplication of N number of data subcarrier, and N circuit-switched datas are encoded to be mapped to N
Individual compound subsymbol.Referring to the modulation principle shown in Fig. 1 (a), 48 data subcarriers can be respectively { sinw0t,
sin2w0T ... ..., sin48w0T }, it is 48 and 48 parallel data { a with the data subcarrier respectively1,a2... ..., a48Phase
Take advantage of.
Data after the mobile terminal can also be multiplied with N number of data subcarrier to N number of parallel data are carried out
Coding mapping, the wherein embodiment of the present invention can be encoded to data so as to generate using the cyclic convolution coding techniques of K=7
N number of plural subsymbol.N number of plural subsymbol can also be sent into an IFFT module by the mobile terminal, and the IFFT modules are used
N number of complex operator sign reversing in by frequency domain is into 2N real number sample value.
The mobile terminal can also be added to Cyclic Prefix before the 2N real number sample value, form the information of cyclic extensions
Code word, the information code word of the cyclic extensions export the baseband signal through parallel serial conversion, digital to analog conversion D/A and low pass filter.
In the present embodiment, symbol time 8us is may be incorporated into, i.e., the time for sending data can be 8us, protect
Interval time 1.6us.Compared with the 802.11a 20MHz bandwidth of wifi, the same quantity of data transmission time used is double, such as
The 802.11a of identical data volume, originally wifi is sent out come modulated signal with 4us, it now is possible to modulated with the time of 8us
Send, this modulation time be come by protection interval time 6.4us+, 1.6us time of FFT computings, although symbol when
Between increase, but purpose is to increase the time of protection interval, and the 802.11a symbol times of originally wifi are 4us, and protection interval is
0.8us。
Optionally, the data sequence processing unit 202, is additionally operable to adopt parameter sets to the binary data sequence at this
After carrying out processing generation baseband signal, the baseband signal is encrypted and package, and to the base band after encryption and package
Signal is through up-conversion output OFDM ofdm signal.
Optionally, the data sequence processing unit 202, the baseband signal after this pair of encryption of execution and package is on
During frequency conversion output OFDM ofdm signal step, specifically for using binary phase shift keying BPSK technologies, orthorhombic phase
One or more moved in keying QPSK technologies, quadrature amplitude modulation 16QAM and phase quadrature amplitude modulation 64QAM technology are to encryption
With the baseband signal up-conversion after package so as to output OFDM ofdm signal.
Wherein, the present embodiment can be encrypted using symmetric encipherment algorithm DES, 3DES and IDEA IDEA etc.
Algorithm is encrypted to the baseband signal.
Optionally, the data sequence processing unit 202, is additionally operable at this through up-conversion output OFDM OFDM
After signal, amplify the power of the ofdm signal.
Optionally, the parameter sets are also rolled up including the circulation of Physical layer convergence protocol PLCP lead code time 32us and K=7
Product coding.
The wherein PLCP includes two long training sequences and two end training sequences, for completing signal detection, increases automatically
Benefit control, diversity reception, thick frequency estimation, time synchronized etc..PLCP lead code time 32us can refer to have time of 32us for
PLCP lead codes are sent out, this time increased one times than the 802.11a standards of wifi, mainly due to during protection in lead code
Between increase and FFT operation times increase.
Wherein, the pilot sub-carrier can be used for channel estimating.
Wherein, the present embodiment can not carry out CSMA/CD to channel.
It should be noted that the N involved by the present embodiment can be the number 48 of the data subcarrier.
It can be seen that, implement the mobile terminal of Fig. 2 descriptions, binary data sequence can be reduced during communications system transmission
Packet loss.
Fig. 3 illustrates a kind of computer system 3 based on von Neumann system of the above-mentioned application interface changing method of operation.
The computer system 3 can be the user terminals such as smart mobile phone, panel computer, palm PC, notebook computer or PC
Equipment.Specifically, it may include by the outer input interface 1001 of system bus connection, processor 1002,1003 and of memorizer
Output interface 1004.Wherein, outer input interface 1001 may include touch screen 10016, can also optionally include network interface
10018.Memorizer 1003 may include external memory 10032 (such as hard disk, CD or floppy disk etc.) and built-in storage 10034.It is defeated
Outgoing interface 1004 may include the equipment such as display screen 10042 and sound equipment/loudspeaker 10044.
In the present embodiment, the operation of this method is based on computer program, and the program file of the computer program is stored in
In the aforementioned external memory 10032 based on the computer system 10 of von Neumann system, built-in storage is operationally loaded into
In 10034, perform in being transferred to processor 1002 after being then compiled as machine code, so that being based on von Neumann system
Computer system 10 in formed operation in logic monitor module 310, finger print detecting module 320, changing interface module 330,
Pressure value judge module 340, the first step-length determining module 350 and the second step-length determining module 360, and cut in above-mentioned application interface
Change in method implementation procedure, the parameter of input is received by outer input interface 1001, and delay in being transferred to memorizer 1003
Deposit, processed in being then input to processor 1002, the result data of process or carry out in being cached in memorizer 1003 follow-up
Ground is processed, or is passed to output interface 1004 and is exported.
Step in present invention method can carry out order adjustment according to actual needs, merge and delete.
Unit in embodiment of the present invention mobile terminal can be merged according to actual needs, divides and be deleted.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Instruct related hardware to complete with by program, the program can be stored in a computer-readable recording medium, storage
Medium include read only memory (Read-Only Memory, ROM), random access memory (Random Access Memory,
RAM), programmable read only memory (Programmable Read-only Memory, PROM), erasable programmable is read-only deposits
Reservoir (Erasable Programmable Read Only Memory, EPROM), disposable programmable read only memory (One-
Time Programmable Read-Only Memory, OTPROM), the electronics formula of erasing can make carbon copies read only memory
(Electrically-Erasable Programmable Read-Only Memory, EEPROM), read-only optical disc (Compact
Disc Read-Only Memory, CD-ROM) or other disk storages, disk memory, magnetic tape storage or can
For carrying or computer-readable any other medium of data storage.
Above a kind of data sequence processing method and relevant device disclosed in the embodiment of the present invention are described in detail,
Specific case used herein is set forth to the principle of the present invention and embodiment, and the explanation of above example is simply used
The method of the present invention and its core concept is understood in help；Simultaneously for one of ordinary skill in the art, according to the present invention's
Thought, will change in specific embodiments and applications, is to sum up somebody's turn to do, and it is right that this specification content should not be construed as
The restriction of the present invention.
Claims (10)
1. a kind of data sequence processing method, it is characterised in that methods described includes：
The binary data sequence of receives input；
The binary data sequence is carried out processing using parameter sets and generate baseband signal, and the baseband signal is set
Working frequency range 2.4GHz ISM bands and bandwidth of operation 10MHz, wherein described parameter sets include number of sub carrier wave 52, the son
Carrier number 52 includes 48 data subcarriers and 4 pilot sub-carriers, and symbol time is 8us, and protection interval is 1.6us.
2. method according to claim 1, it is characterised in that the employing parameter sets are to the binary data sequence
After carrying out processing generation baseband signal, methods described also includes：
The baseband signal is encrypted and package, and to encryption and package after the baseband signal through up-conversion export
OFDM signal.
3. method according to claim 2, it is characterised in that the baseband signal after described pair of encryption and package is passed through
Up-conversion output OFDM ofdm signal, including：
Using binary phase shift keying technology BPSK, QPSK technology QPSK, orthogonal amplitude modulation technique 16QAM and phase
One or more in quadrature amplitude modulation technology 64QAM to encryption and package after the baseband signal up-conversion so as to exporting
OFDM signal.
4. method according to claim 3, it is characterised in that described to believe through up-conversion output OFDM OFDM
Number afterwards, methods described also includes：
Amplify the power of the ofdm signal.
5. the method according to any one of Claims 1-4, it is characterised in that the parameter sets also include physical layer meeting
The cyclic convolution coding of poly- agreement PLCP lead code time 32us and K=7.
6. a kind of mobile terminal, it is characterised in that the mobile terminal includes：
Data sequence receiving unit, for the binary data sequence of receives input；
Data sequence processing unit, for the binary system received to the data sequence receiving unit using parameter sets
Data sequence is carried out processing and generates baseband signal, and arranges working frequency range 2.4GHz ISM bands and the work of the baseband signal
Bandwidth 10MHz, wherein described parameter sets include number of sub carrier wave 52, and the number of sub carrier wave 52 includes 48 data subcarriers
With 4 pilot sub-carriers, symbol time is 8us, and protection interval is 1.6us.
7. mobile terminal according to claim 6, it is characterised in that the data sequence processing unit, is additionally operable in institute
State after carrying out processing generation baseband signal to the binary data sequence using parameter sets, the baseband signal is carried out
Encryption and package, and to encryption and package after the baseband signal through up-conversion output OFDM ofdm signal.
8. mobile terminal according to claim 7, it is characterised in that the data sequence processing unit, it is described performing
The baseband signal after to encryption and package when up-conversion output OFDM ofdm signal step, specifically for
Using binary phase shift keying BPSK technologies, QPSK technology QPSK, orthogonal amplitude modulation technique 16QAM with it is mutually orthogonal
One or more in amplitude-modulation techniques 64QAM to encryption and package after the baseband signal up-conversion so as to output orthogonal
Frequency division multiplex OFDM signal.
9. mobile terminal according to claim 7, it is characterised in that the data sequence processing unit, is additionally operable in institute
State the power for amplifying the ofdm signal after up-conversion output OFDM ofdm signal.
10. the mobile terminal according to any one of claim 6 to 9, it is characterised in that the parameter sets also include physics
The cyclic convolution coding of layer convergence protocol PLCP lead code time 32us and K=7.
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