CN102244558B - Data transmission method and device - Google Patents

Data transmission method and device Download PDF

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Publication number
CN102244558B
CN102244558B CN201010178336.9A CN201010178336A CN102244558B CN 102244558 B CN102244558 B CN 102244558B CN 201010178336 A CN201010178336 A CN 201010178336A CN 102244558 B CN102244558 B CN 102244558B
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transmitting element
sub
symbol
transmitting
training sequence
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CN102244558A (en
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董朋朋
肖洁华
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201010178336.9A priority Critical patent/CN102244558B/en
Priority to PCT/CN2011/073974 priority patent/WO2011140987A1/en
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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
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0079—Formats for control data

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a data transmission method and a data transmission device. Effective information symbols of a transmission unit with the transmission time of T can be distributed to N transmission subunits of which total transmission time is T, and the number of training sequence symbols and a cyclic prefix symbol in each transmission subunit are regulated to fulfill the aim of improving the processing performance of a pre-coded EGPRS2 (PCE) scheme.

Description

Send method and the device of data
Technical field
The present invention relates to communication technical field, be specifically related to send the method and apparatus of data.
Background technology
The evolution process that global system for mobile communications/global system for mobile communications strengthens data transfer rate evolution version wireless access network (GSM/GERAN:Global System for Mobile Communications/GSM EDGE Radio Access Network) nested design wireless traffic is general packet radio service technology (GPRS:General Packet Radio Service), the GPRS (EGPRS:Enhanced GPRS) strengthening, the GPRS stage two (EGPRS2:Enhanced GPRS Phase2) of enhancing.The performance boost of Packet data service is mainly the lifting of data throughout.Wherein, the physical layer of GPRS still adopts Gaussian-filtered minimum shift keying (the GMSK:Gaussian Filtered Minimum Shift Keying) modulation in GSM, chnnel coding adopts CS1～CS4, phase shift keying (the 8PSK:8Phase Shift Keying) modulation of state in having introduced 8 on the basis that EGPRS modulates at original GMSK, chnnel coding adopts the corresponding GMSK modulation of MCS1～MCS4() and MCS5～MCS9(correspondence 8PSK modulation).The more modulation of high-order and new coded system have been introduced in the further evolution of EGPRS2.The technology evolution more complicated of EGPRS2, is divided into again two stages of EGPRS2-A and EGPRS2-B.EGPRS2-A has introduced the more modulation of high-order (16QAM and 32QAM) and new coded system (DAS5～DAS12 and UAS7～UAS11), EGPRS2-B has also introduced high character rate outside the new modulation (QPSK, 16QAM and 32QAM) of introducing and coding (DBS5～DBS12 and UBS5～UBS12).
At present, a kind of existing EGPRS2 improvement technology is (PCE:Pre-coded EGPRS2, EGPRS2 precoding) scheme, by introducing inverse discrete Fourier transform (IDFT:Inverse Discrete Fourier Transform) in modulated terminal, receiving terminal is introduced discrete Fourier transform (DFT:Discrete Fourier Transform) operation EGPRS2 signal procesing in time domain is converted to frequency-region signal processing, thereby effectively reduce Receiver Complexity, can obtain better throughput performance and antagonism TX/RX Impairments(sending/receiving is damaged simultaneously) ability.
In to the research of prior art, inventor finds: in existing PCE scheme, transmitting terminal has adopted the burst(pulse that in current GERAN system, the set time is T) be a transmitting element, the structure chart of the lower pulse of its ordinary symbol speed (NSR:Normal Symbol Rate) as shown in Figure 1, comprise 116 effective information symbol (D1 at this transmitting element, D116) and 26 training sequence symbols (TS1, TS26), wherein effective information refers to user data information to be sent after chnnel coding; And be Cyclic Prefix (CP:Cyclic Prefix) symbol foremost at this transmitting element, the other end is guard time (GP:Guard Period).Figure 2 shows that existing PCE delivery plan sub-carriers distribution map, because subcarrier spacing is less, only have 1.9kHZ, therefore, existing PCE scheme, to frequency error sensitivity, is also that the robustness of frequency error is poor.
Summary of the invention
The embodiment of the present invention provides the method and apparatus that sends data.
A kind of method that sends data, comprise: X1 effective information symbol in a transmitting element that is T by transmitting time assigned in N sub-transmitting element and insert training sequence symbols in each sub-transmitting element, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and in described N sub-transmitting element, the number sum Y2 of training sequence symbols is less than the number Y1 of the training sequence symbols in a described transmitting element; Each sub-transmitting element in described N sub-transmitting element is carried out to sign map, inverse discrete Fourier transform and the operation of increase Cyclic Prefix successively; The rear end of last sub-transmitting element of described N sub-transmitting element is added to P guard time space character; N the sub-transmitting element having increased behind protection interval carried out to transmitted shaping; Send the information after each the sub-transmitting element pulse shaping in described N sub-transmitting element, total transmitting time of described N sub-transmitting element is T; Wherein, described transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time symbol in a transmitting element of T; total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer.
A kind of processor, comprise: allocation units, assign to N sub-transmitting element and insert training sequence symbols in each sub-transmitting element for X1 effective information symbol in a transmitting element that is T by transmitting time, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and the number sum Y2 of the training sequence symbols in described N sub-transmitting element is less than the number Y1 of the training sequence symbols in a described transmitting element; Map unit, for carrying out sign map to the symbol in described N the each sub-transmitting element of sub-transmitting element; Inverse discrete Fourier transform unit, for carrying out inverse discrete Fourier transform to the symbol in described N the each sub-transmitting element of sub-transmitting element; Circulation prefix processing unit, for increasing Cyclic Prefix symbol by the front end of described N the each sub-transmitting element of sub-transmitting element; Guard time processing unit, for adding P guard time space character by the rear end of last sub-transmitting element of described N sub-transmitting element; Transmitted forming unit, for carrying out transmitted shaping by described N the each sub-transmitting element of sub-transmitting element; Transmitting element, for sending the information after each sub-transmitting element pulse shaping of described N sub-transmitting element, total transmitting time T of described N sub-transmitting element; Wherein, described transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time space character in a transmitting element of T; total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer.
A device that sends data, is characterized in that, the device of described transmission data comprises:
Assign to the individual sub-transmitting element of N and in each sub-transmitting element, insert the allocation units of training sequence symbols for X1 effective information symbol in a transmitting element that is T by transmitting time, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and the number sum Y2 of the training sequence symbols in described N sub-transmitting element is less than the number Y1 of the training sequence symbols in a described transmitting element;
For the symbol in described N the each sub-transmitting element of sub-transmitting element being carried out to the map unit of sign map;
For the symbol in described N the each sub-transmitting element of sub-transmitting element being carried out to the inverse discrete Fourier transform unit of inverse discrete Fourier transform;
For the front end of described N the each sub-transmitting element of sub-transmitting element being increased to the circulation prefix processing unit of Cyclic Prefix symbol;
For the rear end of last sub-transmitting element of described N sub-transmitting element being added to the guard time processing unit of P guard time space character;
For the transmitted forming unit that described N the each sub-transmitting element of sub-transmitting element carried out to transmitted shaping;
For sending the information after each sub-transmitting element pulse shaping of described N sub-transmitting element, the transmitting element of total transmitting time T of described N sub-transmitting element;
Wherein, described transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time space character in a transmitting element of T, total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer; Described allocation units are further used for a described Y2 training sequence symbols all to assign in a described N sub-transmitting element in sub-transmitting element; Described X1 effective information symbol to be sent assigned in described N sub-transmitting element.
By the above embodiment of the present invention, can improve the handling property of PCE scheme.
Brief description of the drawings
Fig. 1 has shown the structure chart of a transmitting element.
Fig. 2 has shown a kind of multicarrier system sub-carriers distribution map.
Fig. 3 has shown the schematic diagram of a kind of communication system in one embodiment of the invention by way of example.
Fig. 4 has shown a kind of method schematic diagram that sends data in one embodiment of the invention by way of example.
Fig. 5 has shown a kind of schematic diagram that effective information symbol is divided into two sub-transmitting elements in one embodiment of the invention by way of example.
Fig. 6 a has shown a kind of schematic diagram that effective information symbol is divided into two sub-transmitting elements in another embodiment of the present invention by way of example.
Fig. 6 b has shown a kind of schematic diagram that effective information symbol is divided into two sub-transmitting elements in another embodiment of the present invention by way of example.
Fig. 7 a has shown in one embodiment of the invention a kind of through increasing the schematic diagram of guard time two sub-transmitting elements after treatment by way of example.
Fig. 7 b has shown in another embodiment of the present invention that another is through increasing the schematic diagram of guard time two sub-transmitting elements after treatment by way of example.
Fig. 8 has shown the subcarrier distribution map in a kind of multicarrier system in one embodiment of the invention by way of example.
Fig. 9 has shown a kind of cell schematics of device in one embodiment of the invention by way of example.
Embodiment
Fig. 3 has shown a kind of communication system 100 in one embodiment of the invention by way of example.One or more receiving terminal 120 that communication system 100 has comprised at least one transmitting terminal 110 and carried out data communication with this transmitting terminal 110.For example, communication system 100 can be arranged in GERAN network.
For example, the data communication between transmitting terminal 110 and receiving terminal 120 can be the data communication of carrying out between base station and terminal.Base station can be for being arranged in the base station of GERAN network.Terminal can be wireless device (Radio device), cellular telephone apparatus (Cellular telephone device), computer equipment (Computing device), the equipment of personal communication devices (Personal communication system device) or other any equipment radio communications.
In communication system 100, the pulse structure that transmitting terminal 110 sends can be divided into N subpulse to the pulse structure in existing PCE scheme, make number of symbols in each subpulse that transmitting terminal 110 sends compare number of symbols in the pulse of existing PCE scheme few, also be the less transmission time interval of subpulse support that transmitting terminal 110 sends, thereby can increase the width of subcarrier, improve the defect of PCE scheme to frequency error sensitivity, strengthen the robustness of PCE scheme.In an embodiment of the present invention, pulse can be called transmitting element, and subpulse can be called sub-transmitting element.
A kind of method that sends data providing in one embodiment of the invention has been provided Fig. 4 by way of example.The method comprises following part.
210, X1 effective information symbol in a transmitting element that is T by transmitting time assigned in N sub-transmitting element and insert training sequence symbols in each sub-transmitting element, make the number sum of effective information symbol in N sub-transmitting element be less than or equal to X1, in described N sub-transmitting element, the number sum Y2 of training sequence symbols is less than the number Y1 of the training sequence symbols in a described transmitting element, and wherein X1, Y1, Y2, N are integer.
For example, under ordinary symbol speed (NSR:Normal Symbol Rate), if the not mode of reindexing mapping, the data of an existing pulse are divided into two continuous subpulses to be sent, also be, send by two continuous sub-transmitting elements, N equals 2, the effective information symbolic number X1 of a former transmitting element equals 116, training sequence symbols number Y1 equals 26 so, in order to make every sub-transmitting element have the space of enough placement CP, so, 26 training sequence symbols can be carried out to suitable reduction, make the total number of training sequence symbols in two sub-transmitting elements taper to 20, be that Y2 equals 20.Due to sub-transmitting element, sign map mode is identical during with a transmitting element, and so now 2 sub-transmitting element effective information symbol sums equal X1.In like manner under high character rate (HSR:Higher Symbol Rate), if the form of reindexing mapping not, X1 can equal 138, Y1 equal 31, Y2 equal 23, N equal 2 and these 2 sub-transmitting element effective information symbol sums equal X1.
In another embodiment, transmitting terminal can adopt the mode of high order modulation to the information in N sub-transmitting element, owing to using high order modulation can make the shared effective information symbol numbers of identical effective information bit reduce, therefore the effective information symbol numbers sum in each sub-transmitting element can be less than X1.
Wherein training sequence symbols can be evenly distributed in the middle of effective information symbol.The training sequence symbols of sub-transmitting element can redesign, can be different from the training sequence symbols of a former transmitting element.
In the embodiment that provided by way of example of the present invention, be 1 o'clock at N, can be by the reduced number of Y1 to Y2.Total number of the symbol comprising due to a last N transmitting element equals total number of the symbol comprising in a transmitting element, so, in an embodiment of the present invention, saved symbol can have two purposes: the one, in sub-transmitting element, add filling symbol, filling symbol can be zero, the repetition of random mark or effective information symbol, the object of adding filling symbol is in order to send band edge formation protection; The 2nd, be used for increasing the length of CP in sub-transmitting element, the length of CP in the transmitting element of Length Ratio of CP in sub-transmitting element will be grown, can further reduce like this multipath and disturb, reduce papr (PAPR:Peak to Average Power Ratio).
The principle that the training sequence that is Y1 symbol by length is reduced to Y2 training sequence symbols can be that the performance loss that overall receiver channel is estimated is less than acceptable scope, for example a 0.2dB.
Adopt the method in the present embodiment, the in the situation that of identical transmission bandwidth resources, effective information symbol and training sequence symbols number and number corresponding subcarrier in transmitting element, this number is the size of corresponding transmission time interval also, the less transmission time interval of sub-transmitting element support, reduce the number of effective information symbol and training sequence symbols, thereby can correspondingly increase the width of subcarrier, reach and improve the defect of PCE scheme to frequency error sensitivity, strengthen the robustness of PCE scheme.The papr (PAPR:Peak to Average Power Ratio) simultaneously transmitting also can reduce.
In the embodiment that another provided by way of example of the present invention, what adopt is that X1 effective information symbol to be sent assigned in N sub-transmitting element successively, but, because N sub-transmitting element time is adjacent, therefore, can think that the channel variation of N sub-transmitting element is little, can be used for by the channel estimating information of last sub-transmitting element the channel information of a rear sub-transmitting element, so, Y2 training sequence symbols all can be put in certain the sub-transmitting element in N sub-transmitting element, for example, Y2 training sequence symbols all can be placed in N sub-transmitting element relatively near in a middle sub-transmitting element
220, each sub-transmitting element in N sub-transmitting element is carried out sign map operation, inverse discrete Fourier transform operation and increases Cyclic Prefix operation.
Owing to using high order modulation can make the shared effective information symbol numbers of identical effective information bit reduce, therefore the effective information symbol numbers in each sub-transmitting element can change along with the difference of sign map mode, if following without special declaration for simplified illustration, the sign map mode of N sub-transmitting element keeps identical with the sign map mode of a transmitting element.
After sign map, each sub-transmitting element of N sub-transmitting element carried out to inverse discrete Fourier transform operation.
So-called Cyclic Prefix is exactly to move the signal of afterbody after inverse discrete Fourier transform to transmitting element foremost, as prefix information, can not keep the inter-carrier interference in mutually orthogonal situation for eliminating between the intersymbol interference that brings due to multipath and subcarrier.
The operation of increase Cyclic Prefix is specially all increases Z2 Cyclic Prefix symbol by the front end of each sub-transmitting element in N sub-transmitting element.The length of a former transmitting element Cyclic Prefix is Z1 symbol.
In the embodiment that provided by way of example of the present invention, what adopt is that X1 effective information symbol and Y2 training sequence symbols are assigned in N sub-transmitting element successively, Y2 is less than Y1, and in the constant situation of GP length, need to meet following relational expression in order to ensure that the symbol numbers of the total symbol numbers of N sub-transmitting element and a transmitting element is identical, Y2+N*Z2=Y1+Z1, N >=2.If with N=2, X1=116, Y1=26 and Z1=6 illustrate, as shown in Figure 5, adopting Z2 to equal Z1 is 6 configuration, and an existing transmitting element is divided into 2 sub-transmitting elements, and every individual sub-transmitting element has all had the CP information of 58 effective information symbols, 10 training sequence symbols and 6 symbolic numbers, like this, 2 sub-transmitting element transmitting times used equate.
In the embodiment that another provided by way of example of the present invention, with N=2, X1=116, Y1=26 and Z1=Z2=6 illustrate, as shown in Figure 6 a, due to, the channel variation of first sub-transmitting element and second sub-transmitting element is little, 26 training sequence symbols can be carried out to suitable reduction, make training sequence symbols number can taper to 20, and this training sequence is all dealt in first sub-transmitting element, the transmitting time of first sub-transmitting element can be not identical with the transmitting time of second sub-transmitting element, but, the transmitting time transmitting time of first sub-transmitting element and second sub-transmitting element and that equal a transmitting element, also equal T, the number of symbols that 2 sub-transmitting elements send altogether also equates with the number of symbols of a transmitting element.Meanwhile, adopting the method in the present embodiment, can reach the object of further reduction training sequence symbols, is also that Y2 can further reduce, and the symbol of saving can provide the defencive function that sends band edge for adding filling symbol.
In yet another embodiment of the present invention, equally with N=2, X1=116, Y1=26 and Z1=6 illustrate, and further reduce the size of Y2, as Y2=16, need to meet following relational expression in order to ensure that the symbol numbers of the total symbol numbers of N sub-transmitting element and a transmitting element is identical, Y2+N*Z2=Y1+Z1, can derive Z2=8, and the length of sub-transmitting element Cyclic Prefix is greater than the length of a transmitting element Cyclic Prefix.The CP increasing can further reduce intersymbol interference or/and inter-carrier interference, and the papr simultaneously transmitting (PAPR:Peak to Average Power Ratio) also can reduce.
As shown in Figure 6 b, in the embodiment that another provided by way of example of the present invention, training sequence is all dealt in first sub-transmitting element, first sub-transmitting element equates with the transmitting time of second sub-transmitting element.
230, the rear end of last sub-transmitting element of N sub-transmitting element is added to P guard time space character.
In order to have the time interval of progressively riseing or declining to transmitted signal amplitude, also need the rear end of last sub-transmitting element of N sub-transmitting element to add guard time GP.The present invention does not relate to the amendment of GP length, and therefore the length of GP is got a fixed value.If taking the sub-transmitting element dividing mode shown in Fig. 5 and Fig. 6 b as example, so, after 250 processing, two sub-transmitting elements can be as shown in Fig. 7 a or 7b.
240, N the sub-transmitting element having increased behind protection interval carried out to transmitted shaping.
250, send the information after each the sub-transmitting element pulse shaping in N sub-transmitting element.
Total number of all symbols in the N sending a sub-transmitting element equals the interior all numbers of symbols of a transmitting element that transmitting time is T, is also X1+Y1+Z1+P.
In the present embodiment, X1 effective information symbol in a transmitting element that can be T by transmitting time assigned in N sub-transmitting element, and determine effective information number of symbols and the training sequence symbols number in every sub-transmitting element, can dwindle transmission interval and increase subcarrier width, improve the defect of PCE technology to frequency error sensitivity thereby reached, strengthen robustness, can improve the handling property of PEC scheme.For example, for the sub-transmitting element dividing mode shown in Fig. 5, its subcarrier distributes as shown in Figure 8, distributes as shown in Figure 2 with respect to a transmitting element subcarrier, and its subcarrier width is widened into as 4kHZ by original 1.9kHz.
As shown in Figure 9, shown by way of example a kind of device 900 in one embodiment of the present of invention, this device 900 can complete the repertoire of the embodiment of the method for above-mentioned transmission data.This device 900 can adopt the mode of software and/or hardware to realize the repertoire of said method embodiment, for example, device 900 can comprise one or more processor, and this one or more processor can be realized the repertoire of said method embodiment.For example, device 900 can comprise allocation units 910, map unit 920, inverse discrete Fourier transform unit 930, circulation prefix processing unit 940, guard time processing unit 950, transmitted forming unit 960 and transmitting element 970.
Allocation units 910 are assigned to N sub-transmitting element and insert training sequence symbols in each sub-transmitting elements for X1 effective information symbol in a transmitting element that is T by transmitting time, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and the number sum Y2 of the training sequence in described N sub-transmitting element is less than the number Y1 of the training sequence in a described transmitting element.
Map unit 920 is for carrying out sign map to the symbol in described N the each sub-transmitting element of sub-transmitting element.Inverse discrete Fourier transform unit 930 is for carrying out inverse discrete Fourier transform to the symbol in described N the each sub-transmitting element of sub-transmitting element.
Circulation prefix processing unit 940 is for increasing Cyclic Prefix symbol by the front end of described N the each sub-transmitting element of sub-transmitting element.Guard time processing unit 950 is for adding P guard time space character by the rear end of last sub-transmitting element of described N sub-transmitting element.
Transmitted forming unit 960 is for carrying out transmitted shaping by the symbol in described N the each sub-transmitting element of sub-transmitting element.Transmitting element 970 is for sending the information after each sub-transmitting element pulse shaping of described N sub-transmitting element, total transmitting time T of described N sub-transmitting element.
Wherein, this transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time symbol in a transmitting element of T; total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer.
In another embodiment of the present invention, allocation units 910 are also further used for: a described Y2 training sequence is all assigned in a described N transmitting element in sub-transmitting element; Described X effective information symbol to be sent assigned in described N sub-transmitting element.
In yet another embodiment of the present invention, allocation units 910 are also further used for: a described Y2 training sequence is all assigned to the middle sub-transmitting element that is arranged in described N sub-transmitting element.
In yet another embodiment of the present invention, allocation units 910 are also further used for: by described X1 effective information symbol and a described Y2 training sequence to be sent, assign to successively in described N sub-transmitting element, wherein, in each the sub-transmitting element in described N sub-transmitting element, include one or more training sequences.
In yet another embodiment of the present invention, allocation units 910 are also further used for: in sub-transmitting element, add filling symbol, so that total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element.
A kind of communication system is provided in one embodiment of the present of invention by way of example, and this communication system comprises one or more transmitting terminal.This transmitting terminal can complete the repertoire in said method embodiment.Wherein, the specific implementation details of transmitting terminal, referring to the description of above-described embodiment, does not repeat them here.
By the description of above embodiment, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random AccessMemory), magnetic disc or CDs.
In the several embodiment that provide in the application, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, when actual realization, can have other dividing mode, for example multiple unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, the each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and also can adopt the form of SFU software functional unit to realize.If described integrated unit is realized and during as production marketing independently or use, also can be stored in a computer read/write memory medium using the form of SFU software functional unit.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.

Claims (10)

1. a method that sends data, is characterized in that, described method comprises:
X1 effective information symbol in a transmitting element that is T by transmitting time assigned in N sub-transmitting element and insert training sequence symbols in each sub-transmitting element, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and in described N sub-transmitting element, the number sum Y2 of training sequence symbols is less than the number Y1 of the training sequence symbols in a described transmitting element;
Each sub-transmitting element in described N sub-transmitting element is carried out to sign map, inverse discrete Fourier transform and the operation of increase Cyclic Prefix successively;
The rear end of last sub-transmitting element of described N sub-transmitting element is added to P guard time space character;
N the sub-transmitting element having increased behind protection interval carried out to transmitted shaping;
Send the information after each the sub-transmitting element pulse shaping in described N sub-transmitting element, total transmitting time of described N sub-transmitting element is T;
Wherein, described transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time space character in a transmitting element of T, total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer; X1 effective information symbol in a described transmitting element that is T by transmitting time assigned in N sub-transmitting element and insert training sequence symbols in each sub-transmitting element and comprise:
A described Y2 training sequence symbols is all assigned in a described N sub-transmitting element in sub-transmitting element;
Described X1 effective information symbol to be sent assigned in described N sub-transmitting element.
2. method according to claim 1, is characterized in that, in described N sub-transmitting element, Cyclic Prefix symbol, effective information symbol and the training sequence symbols of each sub-transmitting element transmitting time used equates.
3. method according to claim 1, is characterized in that, the described sub-transmitting element that a described Y2 training sequence symbols is all assigned in the individual sub-transmitting element of described N comprises:
A described Y2 training sequence symbols is all assigned to the middle sub-transmitting element that is arranged in described N sub-transmitting element.
4. according to the method described in claim 1 to 3 any one, it is characterized in that, X1 effective information symbol in a described transmitting element that is T by transmitting time assigned to N sub-transmitting element and comprised:
In sub-transmitting element, add filling symbol, so that total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element.
5. the method for claim 1, is characterized in that, in the operation of described increase Cyclic Prefix, the circulating prefix-length increasing when the transmitting element of Length Ratio of the Cyclic Prefix of increase is long.
6. a processor, is characterized in that, described processor comprises:
Allocation units, assign to N sub-transmitting element and insert training sequence symbols in each sub-transmitting element for X1 effective information symbol in a transmitting element that is T by transmitting time, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and the number sum Y2 of the training sequence symbols in described N sub-transmitting element is less than the number Y1 of the training sequence symbols in a described transmitting element;
Map unit, for carrying out sign map to the symbol in described N the each sub-transmitting element of sub-transmitting element;
Inverse discrete Fourier transform unit, for carrying out inverse discrete Fourier transform to the symbol in described N the each sub-transmitting element of sub-transmitting element;
Circulation prefix processing unit, for increasing Cyclic Prefix symbol by the front end of described N the each sub-transmitting element of sub-transmitting element;
Guard time processing unit, for adding P guard time space character by the rear end of last sub-transmitting element of described N sub-transmitting element;
Transmitted forming unit, for carrying out transmitted shaping by described N the each sub-transmitting element of sub-transmitting element;
Transmitting element, for sending the information after each sub-transmitting element pulse shaping of described N sub-transmitting element, total transmitting time T of described N sub-transmitting element;
Wherein, described transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time space character in a transmitting element of T, total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer; Described allocation units are further used for a described Y2 training sequence symbols all to assign in a described N sub-transmitting element in sub-transmitting element; Described X1 effective information symbol to be sent assigned in described N sub-transmitting element.
7. processor according to claim 6, is characterized in that, described allocation units are further used for:
A described Y2 training sequence symbols is all assigned to the middle sub-transmitting element that is arranged in described N sub-transmitting element.
8. according to the processor described in claim 6 to 7 any one, described allocation units are further used for:
In sub-transmitting element, add filling symbol, so that total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element.
9. processor as claimed in claim 6, is characterized in that, the length of the Cyclic Prefix increasing when the transmitting element of Length Ratio of the Cyclic Prefix that described circulation prefix processing unit increases the sub-transmitting element of described N is long.
10. a device that sends data, is characterized in that, the device of described transmission data comprises:
Assign to the individual sub-transmitting element of N and in each sub-transmitting element, insert the allocation units of training sequence symbols for X1 effective information symbol in a transmitting element that is T by transmitting time, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and the number sum Y2 of the training sequence symbols in described N sub-transmitting element is less than the number Y1 of the training sequence symbols in a described transmitting element;
For the symbol in described N the each sub-transmitting element of sub-transmitting element being carried out to the map unit of sign map;
For the symbol in described N the each sub-transmitting element of sub-transmitting element being carried out to the inverse discrete Fourier transform unit of inverse discrete Fourier transform;
For the front end of described N the each sub-transmitting element of sub-transmitting element being increased to the circulation prefix processing unit of Cyclic Prefix symbol;
For the rear end of last sub-transmitting element of described N sub-transmitting element being added to the guard time processing unit of P guard time space character;
For the transmitted forming unit that described N the each sub-transmitting element of sub-transmitting element carried out to transmitted shaping;
For sending the information after each sub-transmitting element pulse shaping of described N sub-transmitting element, the transmitting element of total transmitting time T of described N sub-transmitting element;
Wherein, described transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time space character in a transmitting element of T, total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer; Described allocation units are further used for a described Y2 training sequence symbols all to assign in a described N sub-transmitting element in sub-transmitting element; Described X1 effective information symbol to be sent assigned in described N sub-transmitting element.
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