CN1917383A - Method and device for sending out data in wireless mobile communication system - Google Patents
Method and device for sending out data in wireless mobile communication system Download PDFInfo
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- CN1917383A CN1917383A CNA2005100904914A CN200510090491A CN1917383A CN 1917383 A CN1917383 A CN 1917383A CN A2005100904914 A CNA2005100904914 A CN A2005100904914A CN 200510090491 A CN200510090491 A CN 200510090491A CN 1917383 A CN1917383 A CN 1917383A
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Abstract
The method comprises: making spread spectrum for the message source data of each user; de-blocking the data processed with spread spectrum; taking B number of continuous data as a data block; making time compressing and repeating for each said data block, and the repeat number is R; the said repeated data is sequentially multiplied by a phase sequence exclusively owned by the user; the length of the phase sequence is the product of B and R; the multiplied data is transmitted wirelessly. Wherein, the step of inserting the guard space between said data blocks is left out.
Description
(1) technical field
The present invention relates to a kind of wireless communication technology, more specifically to data transmission method for uplink in a kind of mobile radio system and transmitting apparatus.
(2) background technology
Rise along with wireless mobile telecommunication technology and mobile radio system, about improve traffic rate, increase power system capacity, support the technical discussion of faster mobile speed just in the middle of carrying out always, accordingly, the Technological improvement plan of the performance of the interference level in how can the reduction system, the availability of frequency spectrum of optimizing Radio Resource, the opposing wireless channel decline of improvement system etc. is also constantly put forward, and these problems and solution thereof all have confidential relation with the mode that wireless multiple access inserts.
Direct sequence spread spectrum codes divides multiple access to insert mode that (DS-SS CDMA:Direct Sequence-Spread Spectrum CodeDivision Multiple Access) technology combines with scrambler (Scrambling), and frequency spectrum resource utilization rate and good interference free performance are extensively adopted by third generation wireless mobile communications standard efficiently because of it.Divide under the mode that multiple access inserts with scrambler combines in direct sequence spread spectrum codes, a user's data in the mobile radio system is at first carried out spread spectrum by multiplying each other with a spreading code (Spreading Code) sequence; Because in the spreading code set of described system, has mutually orthogonal their cross correlation between each described spreading code, therefore, after the different user in the described system uses different spreading codes to carry out spread spectrum, data-signal behind each described user's spread spectrum is with separate, thereby at one time, a plurality of described users just can be access in system together and not interfere with each other; Then, data will be by a scrambler sequence scrambling behind described user's the spread spectrum, and in each sub-district of described system, described user will use the specific scrambler sequence in each sub-district with the phase mutual interference between the inhibition neighbor cell, thereby the set of the spreading code in the described system can be multiplexing in each sub-district.By such code division multiple access mode, make in a plurality of sub-districts of a mobile radio system, each users'data signals is able to mutual difference, make a plurality of users connecting system at one time, and make the spread spectrum code resources in the system be able in each sub-district of system, effectively utilize, time division multiple access in second generation mobile radio system inserts (TDMA:Time Division Multiple Access) mode, can improve the user capacity of system, improve the communication performance of system.
But because the peculiar multipath transmisstion of wireless channel (Multi-path transmission) characteristic in the wireless mobile communications, wireless signal will produce multipath component through after the wireless channel transmission, and owing to the multipath transmisstion time delay and broadened.Like this, after through the wireless channel transmission, because described multipath broadening, data-signal behind each described user's spread spectrum will produce relative displacement, it is the data-signal complete matching no longer in time behind each described user's spread spectrum, and when having relative displacement, no longer has mutually orthogonal their cross correlation between each described user's the spreading code, therefore, data-signal behind each described user's spread spectrum is no longer separate after transmitting through wireless channel, and the multiple access that described direct sequence spread spectrum codes divides the multiple access mode that access combines with scrambler will face under the wireless channel communication environments between the different user disturbs (MAI:MultipleAccess Interference) problem.
At above-mentioned problem, a kind of direct sequence spread spectrum codes divides multiple access to obtain people's attention gradually with the wireless multiple access access way that interlaced FDMA (IFDMA:InterleavedFrequency Division MultipleAccess) combines.Under such access way, at first, divide multi-access mode identical with direct sequence spread spectrum codes, user's data will multiply each other with a spread spectrum code sequence and by spread spectrum in the mobile radio system; Then, the data behind described user's spread spectrum can be by a scrambler sequence scrambling, and the employed scrambler sequence in each sub-district is different, thereby makes the described spread spectrum code resources can be multiplexing in each sub-district; Will with direct sequence spread spectrum codes divide multi-access mode different be, next the data of described user after by scrambler will be by piecemeal, each described data block and then by time compression and repetition, described data block by time compression with repeat after duration identical with its original duration; Through described time compression and repetitive process, described users'data signals periodically repeats in time-domain, thereby it presents the spectral characteristic of pectination (Comb-shaped) in frequency domain; Because the multipath transmisstion characteristic of above-mentioned wireless channel, for former and later two data blocks that make described user can be because of the mutual interference of multipath broadening phase, to be filled the protection interval with certain-length between former and later two data blocks of described user, described protection length at interval is by the maximum multipath propagation delay decision of wireless channel; At last, the proprietary phase sequence of data block after described user repeated and described user multiplies each other successively, by described multiplication operations, can make the frequency spectrum non-overlapping copies of each described user data signal, disturb thereby guaranteed not produce between the different user in described system multiple access.Divide the detailed description of the wireless multiple access access way that multiple access combines with interlaced FDMA to see also about direct sequence spread spectrum codes: Y.Goto, T.Kawamura, H.Atarashi, M.Sawahashi, " Variablespreading and chip repetition factors (VSCRF)-CDMA in reverse link for broadband wirelessaccess ", Personal, Indoor and Mobile Radio Communications, 2003 (PIMRC 2003), 14
ThIEEEProceedings on, vol.1, pp.254 U 259,7-10 Sept.2003.
By the wireless multiple access access way that above-mentioned direct sequence spread spectrum codes divides multiple access to combine with interlaced FDMA, the multiple access interference problem under the described wireless channel communication environments between the different user is solved.Yet, also existing a defective under the described wireless multiple access access way: will be filled protection interval between former and later two data blocks of described user with certain-length.Because described protection length at interval is by the maximum multipath propagation delay decision of wireless channel, if there is bigger multipath transmisstion time delay in wireless propagation environment, required described protection length at interval will be longer; And, in third generation wireless mobile communications standard, the working frequency range of system is 2.4GHz, spreading rate behind the spread spectrum can reach 3.84MHz, described wireless multiple access access way certainly will face more abominable multipath transmisstion time delay, thereby may make described protection length at interval become very long, this will cause the traffic rate of mobile radio system to reduce greatly, make the availability of frequency spectrum impaired, simultaneously, described user's data transmitting apparatus also will seriously reduce the transmitted power of data because of a large amount of existence at described protection interval; And do not see in the prior art at the solution of described problem.
(3) summary of the invention
The problem that exists in the wireless multiple access access way that the objective of the invention is to divide multiple access to combine with interlaced FDMA at above-mentioned direct sequence spread spectrum codes, data transmission method for uplink and transmitting apparatus in a kind of mobile radio system are proposed, can be in the abominable wireless propagation environment of multipath transmisstion time delay, the traffic rate of raising system, optimize the data sending power of the availability of frequency spectrum and data transmitting equipment, also can improve the communication performance of system simultaneously.
Above-mentioned goal of the invention is realized by following technical scheme: the data transmission method for uplink in the mobile radio system comprises that step is as follows:
A. a user's information source data are carried out spread spectrum, spreading factor is G, G 〉=1;
B. with the deblocking behind the above-mentioned spread spectrum, be a data block with continuous B described data, B be G positive integer doubly;
C. each is above-mentioned data block is carried out time compression and repetition, and number of repetition is R, R 〉=1;
D. the data after the above-mentioned repetition and described user is a proprietary phase sequence multiplies each other successively, and the length of described phase sequence is the product of B and R;
E. the data after above-mentioned the multiplying each other are sent with wireless mode.
According to an aspect of the present invention, in described step a, described user's information source data are the binary bits data, before described Bit data is carried out spread spectrum, at first described Bit data are carried out chnnel coding; Before the data after the described chnnel coding are carried out spread spectrum, further it is modulated.
According to an aspect of the present invention, in described step b, before to the deblocking behind the described spread spectrum, the data behind the described spread spectrum are carried out scrambler.
According to an aspect of the present invention, in described step e, before the data after described the multiplying each other are sent out, the data after described the multiplying each other are carried out pulse shaping.
Data transmitting equipment in a kind of mobile radio system comprises:
A. a user's information source data are carried out the device of spread spectrum, spreading factor is G, G 〉=1;
B. with the device of the deblocking behind the above-mentioned spread spectrum, B described data are a data block continuously, B be G positive integer doubly;
C. each is above-mentioned data block is carried out the device of time compression and repetition, and number of repetition is R, R 〉=1;
D. with data after the above-mentioned repetition and a proprietary device that phase sequence multiplies each other successively of described user, the length of described phase sequence is the product of B and R;
E. with the device of the data after above-mentioned the multiplying each other with the wireless mode transmission.
According to an aspect of the present invention, described user's information source data are the binary bits data, before described device a carries out spread spectrum to described Bit data, also comprise the device that described Bit data is carried out chnnel coding in the described equipment.
According to an aspect of the present invention, the data after described device a is to described chnnel coding also comprise the device that the data after the described chnnel coding are modulated before carrying out spread spectrum in the described equipment.
According to an aspect of the present invention, before the deblocking after described device b is to described spread spectrum, also comprise the device that the data behind the described spread spectrum is carried out scrambler in the described equipment.
According to an aspect of the present invention, before the data after described device e sends described multiplying each other, also comprise the device that the data after described the multiplying each other is carried out pulse shaping in the described equipment.
(4) description of drawings
Purpose of the present invention and feature will be described in detail in conjunction with the accompanying drawings by embodiment, and these embodiment are illustrative, not have restricted.
Fig. 1 represents an embodiment of the inventive method.
Fig. 2 represents an embodiment of present device.
(5) embodiment
Fig. 1 and Fig. 2 are respectively the embodiment of the inventive method and present device.
At the problem that exists in the existing wireless multiple access access way, for in the abominable wireless propagation environment of multipath transmisstion time delay, the traffic rate of raising system, optimize the availability of frequency spectrum, the method according to this invention, for a user k in the mobile radio system, its method that sends data will comprise the steps:
A. the information source data of described user k are carried out spread spectrum, spreading code length is G chip, G 〉=1;
B. with the deblocking behind the above-mentioned spread spectrum, be a data block with continuous B described data, B be G positive integer doubly;
C among Fig. 2
K, iRepresent data behind the described spread spectrum, k is described user's a sequence number, i=1, and 2 ..., G ... chip sequence number for data behind the described spread spectrum;
C. each is above-mentioned data block is carried out time compression and repetition, and number of repetition is R, R 〉=1;
D. the data after the above-mentioned repetition and described user is a proprietary phase sequence multiplies each other successively, and the length of described phase sequence is the product of B and R;
E. the data after above-mentioned the multiplying each other are sent with wireless mode;
The change procedure of data before being sent out that has shown described user k among Fig. 2.As can be seen; the wireless multiple access access way of dividing multiple access to combine than existing direct sequence spread spectrum codes with interlaced FDMA; method of the present invention has been saved and inserted protection step at interval between each described data block between described step c and described steps d.
In described step a, the set of described user's spreading code can be used Gold sign indicating number or Walsh code (Walsh Code) set; In described step b, the value of B depends on the correlation time of wireless channel decline, and the two should mate mutually; In steps d, the proprietary phase sequence of described user k can adopt following form:
s
k，i＝exp{-j·i·φ
k}，i＝1，2，…，BR (1)
Wherein j is an imaginary unit,
For described user k proprietary.
In addition, in described step a, to described user for before binary bits information source data carry out spread spectrum, also can at first carry out chnnel coding to described Bit data, the mode of chnnel coding can adopt the mode of convolutional encoding or Turbo coding etc.; Then, before the data after the described chnnel coding are carried out spread spectrum, further it is modulated, spendable modulation system has QPSK or qam mode etc.In described step b, can be multiplexing in different sub-districts for described spreading code is gathered, still can be before to the deblocking behind the described spread spectrum, data behind the described spread spectrum are carried out scrambler, employed scrambler sequence is generally pseudo random sequences such as Gold sequence, and the scrambler sequence of different districts can be the out of phase skew of Gold sequence.At last, in the implementation procedure of described mobile radio system, before data after multiplying each other described in the described step e are sent out, also need the data after described the multiplying each other are carried out pulse shaping, pulse shaping filter is generally root raised cosine (Root-raisedcosine) Nyquist filter.
Accordingly, according to equipment of the present invention, the embodiment of a present device will be as shown in Figure 2.Wherein, the data transmitting equipment of described user k will comprise:
A. the information source data of described user k are carried out the device of spread spectrum, spreading factor is G, G 〉=1;
B. with the device of the deblocking behind the above-mentioned spread spectrum, B described data are a data block continuously, B be G positive integer doubly;
C. each is above-mentioned data block is carried out the device of time compression and repetition, and number of repetition is R, R 〉=1;
D. with data after the above-mentioned repetition and a proprietary device that phase sequence multiplies each other successively of described user, the length of described phase sequence is the product of B and R;
E. with the device of the data after above-mentioned the multiplying each other with the wireless mode transmission.
Divide data transmitting equipment in the wireless multiple access access way that multiple access combines with interlaced FDMA, the data transmitting equipment of the k of user described in the present invention to save than existing direct sequence spread spectrum codes at the device that between each described data block, inserts the protection interval between described device c and the described device d.
In like manner, the foregoing description according to the inventive method, before described device a carries out spread spectrum to the binary source Bit data of described user k, also can comprise in the described equipment described Bit data is carried out the device of chnnel coding and the device that the data after the described chnnel coding are modulated.Before the deblocking after described device b is to described spread spectrum, also can comprise the device that the data behind the described spread spectrum is carried out scrambler in the described equipment.Before the data after described device e sends described multiplying each other, also can comprise the device that the data after described the multiplying each other is carried out pulse shaping in the described equipment.
In the present invention; though the protection between each data block of described user no longer exists at interval; the described data block that same user and different user are adjacent in time will take place overlapped owing to the multipath transmisstion time delay of wireless channel; but those skilled in the art will it be easy to show that the pectination spectral characteristic of the non-overlapping copies between the described different user still keeps; thereby the present invention still has the advantage of disturbing at the multiple access of eliminating under the wireless channel communication environments between the different user.Simultaneously, for described same user's adjacent data blocks owing to the overlapped data block that produces is crosstalked, when the chip duration the multipath transmisstion time delay of wireless channel is being carried out time compression and repeated than described data block after can be compared, can use the receiving equipment with implied diversity gain of RAKE receiver form that the multipath data-signal that produces after propagating through wireless channel is apt to add utilization, merged after the multipath data-signal that produces during wireless channel propagated separates and obtain diversity gain, thereby the data-signal that effectively suppresses described user self is crosstalked because of the data block that the multipath transmisstion of wireless channel produces.
As mentioned above, the wireless multiple access access way of dividing multiple access to combine than existing direct sequence spread spectrum codes with interlaced FDMA, the protection of saving between each data block of described user not only can not cause the communicativeness loss of energy at interval, also can obtain the improvement of communication performance by above-mentioned RAKE method of reseptance, and in the abominable wireless propagation environment of multipath transmisstion time delay, can significantly improve the traffic rate of system, optimize the availability of frequency spectrum; Simultaneously, owing to no longer there is the transmission gap of data because of described protection insertion at interval in the process of transmitting of described user data, the data sending power of described data transmitting equipment also can greatly be saved, and makes the power consumption of described data transmitting equipment more economical.
Claims (10)
1. the data transmission method for uplink in the mobile radio system is characterized in that comprising that step is as follows:
A. a user's information source data are carried out spread spectrum, spreading factor is G, G 〉=1;
B. with the deblocking behind the above-mentioned spread spectrum, be a data block with continuous B described data, B be G positive integer doubly;
C. each is above-mentioned data block is carried out time compression and repetition, and number of repetition is R, R 〉=1;
D. the data after the above-mentioned repetition and described user is a proprietary phase sequence multiplies each other successively, and the length of described phase sequence is the product of B and R;
E. the data after above-mentioned the multiplying each other are sent with wireless mode.
2. the data transmission method for uplink in the mobile radio system as claimed in claim 1, it is characterized in that in described step a, described user's information source data are the binary bits data, before described Bit data is carried out spread spectrum, at first described Bit data are carried out chnnel coding.
3. the data transmission method for uplink in the mobile radio system as claimed in claim 2 is characterized in that further it being modulated before the data after the described chnnel coding are carried out spread spectrum.
4. as the data transmission method for uplink in the described mobile radio system of arbitrary claim in the claim 1 to 3, it is characterized in that in described step b, before to the deblocking behind the described spread spectrum, the data behind the described spread spectrum are carried out scrambler.
5. as the data transmission method for uplink in the described mobile radio system of arbitrary claim in the claim 1 to 3, it is characterized in that in described step e, before the data after described the multiplying each other are sent out, the data after described the multiplying each other are carried out pulse shaping.
6. the data transmitting equipment in the mobile radio system is characterized in that comprising as lower device:
A. a user's information source data are carried out the device of spread spectrum, spreading factor is G, G 〉=1;
B. with the device of the deblocking behind the above-mentioned spread spectrum, B described data are a data block continuously, B be G positive integer doubly;
C. each is above-mentioned data block is carried out the device of time compression and repetition, and number of repetition is R, R 〉=1;
D. with data after the above-mentioned repetition and a proprietary device that phase sequence multiplies each other successively of described user, the length of described phase sequence is the product of B and R;
E. with the device of the data after above-mentioned the multiplying each other with the wireless mode transmission.
7. the data transmitting equipment in the mobile radio system as claimed in claim 6, the information source data that it is characterized in that described user are the binary bits data, before described device a carries out spread spectrum to described Bit data, also comprise the device that described Bit data is carried out chnnel coding in the described equipment.
8. the data transmitting equipment in the mobile radio system as claimed in claim 7, before it is characterized in that data after described device a is to described chnnel coding are carried out spread spectrum, also comprise the device that the data after the described chnnel coding are modulated in the described equipment.
9. as the data transmitting equipment in the described mobile radio system of arbitrary claim in the claim 6 to 8, it is characterized in that also comprising the device that the data behind the described spread spectrum is carried out scrambler in the described equipment before the deblocking after described device b is to described spread spectrum.
10. as the data transmitting equipment in the described mobile radio system of arbitrary claim in the claim 6 to 8, it is characterized in that also comprising the device that the data after described the multiplying each other is carried out pulse shaping in the described equipment before the data after described device e sends described multiplying each other.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100904914A CN1917383A (en) | 2005-08-17 | 2005-08-17 | Method and device for sending out data in wireless mobile communication system |
| JP2006218834A JP2007053756A (en) | 2005-08-17 | 2006-08-10 | Data transmission method, data receiving method, and device thereof for radio mobile communications system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100904914A CN1917383A (en) | 2005-08-17 | 2005-08-17 | Method and device for sending out data in wireless mobile communication system |
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| CN1917383A true CN1917383A (en) | 2007-02-21 |
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| CNA2005100904914A Pending CN1917383A (en) | 2005-08-17 | 2005-08-17 | Method and device for sending out data in wireless mobile communication system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013060268A1 (en) * | 2011-10-24 | 2013-05-02 | 华为技术有限公司 | Signal transmission method and signal transmission device |
| CN103458460A (en) * | 2012-05-31 | 2013-12-18 | 国际商业机器公司 | Method and device for compressing and decompressing signal data |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4557859B2 (en) * | 2005-09-29 | 2010-10-06 | 富士通株式会社 | Frequency division multiplexing transmission / reception apparatus and transmission / reception method |
| CN110545159B (en) | 2017-01-24 | 2021-01-05 | 华为技术有限公司 | Data descrambling method and device for wireless communication system |
-
2005
- 2005-08-17 CN CNA2005100904914A patent/CN1917383A/en active Pending
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2006
- 2006-08-10 JP JP2006218834A patent/JP2007053756A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013060268A1 (en) * | 2011-10-24 | 2013-05-02 | 华为技术有限公司 | Signal transmission method and signal transmission device |
| CN103458460A (en) * | 2012-05-31 | 2013-12-18 | 国际商业机器公司 | Method and device for compressing and decompressing signal data |
| CN103458460B (en) * | 2012-05-31 | 2017-04-12 | 国际商业机器公司 | Method and device for compressing and decompressing signal data |
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| JP2007053756A (en) | 2007-03-01 |
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