CN105164987A - Method for data transmission, method for data reception, and device - Google Patents

Method for data transmission, method for data reception, and device Download PDF

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Publication number
CN105164987A
CN105164987A CN201380076062.4A CN201380076062A CN105164987A CN 105164987 A CN105164987 A CN 105164987A CN 201380076062 A CN201380076062 A CN 201380076062A CN 105164987 A CN105164987 A CN 105164987A
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carriers
sub
block
data
sequence
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刘永俊
李蕊
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • H04L27/2614—Peak power aspects
    • H04L27/2615—Reduction thereof using coding
    • H04L27/2617—Reduction thereof using coding using block codes

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Provided in the present invention are a method for data transmission, a method for data reception, and a device. By means of advance grouping of orthogonal subcarriers in an OFDM system, subcarrier blocks are acquired, where the number of orthogonal subcarriers that the subcarrier blocks comprise is a power of 2. By dividing a to-be-transmitted binary bit sequence into blocks at a transmitting end on the basis of the number of orthogonal subcarriers that the subcarrier blocks comprise, data blocks are acquired. As such, a preconfigured transmission code set used for reducing PAPR is utilized for data coding of the data blocks and for corresponding reception at a receiving end. Because subcarrier blocks that comprise orthogonal subcarriers numbered at a power of 2 are acquired by advance grouping, and data blocks corresponding to the subcarrier blocks are coded respectively on the basis of the number of orthogonal subcarriers that the subcarrier blocks comprise, solved is the technical problem of limited code length due to reduced utilization rate of orthogonal subcarriers caused by utilization of a sequence coding to reduce PAPR.

Description

Method for data transmission, method for data reception, and device
Data transmission method for uplink, data receiver method and device
The present embodiments relate to the communication technology, more particularly to a kind of data transmission method for uplink, data receiver method and device for technical field.Background technology
Orthogonal step person point multiplexing (Orthogonal Frequency Division Multiplexing, OFDM it is) a kind of special multi-carrier modulation technology, ofdm system is by multiple mutually orthogonal orthogonal sub-carriers by serial binary bit sequence parallel output to be sent.But due to each orthogonal sub-carriers phase it is same or like when, the ofdm signal of output has higher papr（Peak to Average Power Ratio, PAPR), so as to cause the ofdm signal of output easily non-linear distortion occur in transmitting procedure.
In the prior art, the method that transmitting terminal reduces PAPR using sequential coding is transmitted to binary bit sequence to be sent, PAPR transmission code collection is reduced especially by construction, for example：Block code, based on M sequential codings and Reed-Muller code（Reed-Mul ler, RM) Golay complementary code, carry out sequential coding using the transmission code set pair binary bit sequence and constellation is modulated, obtain data symbol, data symbol is carried in each orthogonal sub-carriers, carry out inverse fast Fourier transform（Inverse fast Fourier transform, IFFT) after sent to receiving terminal, so as to reduce PAPR.But because the reduction PAPR of construction transmission code collection requires that the quantity of the orthogonal sub-carriers for carrying data symbol is only capable of the power for 2, the power orthogonal sub-carriers for there was only 2 in each orthogonal sub-carriers are caused to carry data symbol, remaining orthogonal sub-carriers can not carry data symbol, the code length of simultaneous transmission code collection is again related to the quantity for the orthogonal sub-carriers that this is used to carrying data symbol, therefore, the method that sequential coding of the prior art reduces PAPR, the utilization rate of orthogonal sub-carriers can be caused relatively low, and then cause code length to be limited.The content of the invention
The embodiment of the present invention provides a kind of data transmission method for uplink, data receiver method and device, and the utilization rate for solving the orthogonal sub-carriers caused by sequential coding reduction PAPR of the prior art is relatively low, the limited technical problem of code length.
One side is to provide a kind of data transmission method for uplink, is transmitted applied to using each orthogonal sub-carriers In the orthogonal frequency division multiplex OFDM system of data, including：The orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtain data block, the block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers；Using being configured to reduce PAPR transmission code collection in advance, sequential coding is carried out to the data block, at least one coded sequence is obtained；To each coded sequence at least one described coded sequence, planetary modulation is entered respectively, at least one data symbol is obtained；Using orthogonal sub-carriers corresponding with least one described data symbol in the block of sub-carriers, at least one described data symbol is carried respectively；OFDM modulation is carried out to carrying each orthogonal sub-carriers described in data message, each ofdm signal is obtained；The data message includes the data symbol；Each ofdm signal described in transmitted in parallel.
Second aspect is to provide a kind of data receiver method, and applied to utilization, each orthogonal sub-carriers is transmitted in the orthogonal frequency division multiplex OFDM system of data, including：Each ofdm signal is received parallel；OFDM demodulation is carried out to each ofdm signal of reception, each OFDM demodulation signal is obtained；The orthogonal sub-carriers included using each block of sub-carriers, are extracted to each described OFDM demodulation signal respectively, obtain each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers is included；Each block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that each block of sub-carriers is included is 2 power；Enter planetary demodulation to each data symbol, obtain each coded sequence at least one coded sequence；Using being configured to reduce PAPR transmission code collection in advance, each coded sequence is decoded, the corresponding data block of each block of sub-carriers is obtained；The data block corresponding to each block of sub-carriers is integrated, and obtains binary bit sequence.
3rd aspect is to provide a kind of data sending device, and applied to utilization, each orthogonal sub-carriers is transmitted in the orthogonal frequency division multiplex OFDM system of data, including：
Piecemeal processing module, for the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtain data block, the block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers；
Sequential coding module, for using being configured to reduce PAPR transmission code collection in advance, carrying out sequential coding to the data block, obtaining at least one coded sequence；
Constellation modulation module, for each coded sequence at least one described coded sequence, Enter planetary modulation respectively, obtain at least one data symbol；
First carrier module, for using orthogonal sub-carriers corresponding with least one described data symbol in the block of sub-carriers, being carried respectively at least one described data symbol；
Modulation module, for carrying out OFDM modulation to carrying each orthogonal sub-carriers described in data message, obtains each ofdm signal；The data message includes the data symbol；
Sending module, for each ofdm signal described in transmitted in parallel.
4th aspect is to provide a kind of data sink, and applied to utilization, each orthogonal sub-carriers is transmitted in the orthogonal frequency division multiplex OFDM system of data, including：
Receiving module, for receiving each ofdm signal parallel；
Demodulation module, carries out OFDM demodulation for each ofdm signal to reception, obtains each OFDM demodulated signal；
First extraction module, for the orthogonal sub-carriers included using each block of sub-carriers, each described OFDM demodulation signal is extracted respectively, each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers is included is obtained；Each block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that each block of sub-carriers is included is 2 power；
Constellation demodulation module, for entering planetary demodulation to each data symbol, obtains each coded sequence at least one coded sequence；
Sequential decoding module, for using being configured to reduce PAPR transmission code collection in advance, being decoded to each coded sequence, obtains the corresponding data block of each block of sub-carriers；
Module is integrated, for being integrated to the corresponding data block of each block of sub-carriers, acquisition binary bit sequence.
5th aspect is to provide a kind of data sending device, and applied to utilization, each orthogonal sub-carriers is transmitted in the orthogonal frequency division multiplex OFDM system of data, including：
Memory, for depositing program；
Processor, performs described program, for：The orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtains data block；Using being configured to reduce PAPR transmission code collection in advance, sequential coding is carried out to the data block, at least one coded sequence is obtained；To each coded sequence at least one described coded sequence, planetary modulation is entered respectively, at least one data symbol is obtained；Using in the block of sub-carriers with least one described data symbol Corresponding orthogonal sub-carriers, are carried respectively at least one described data symbol；OFDM modulation is carried out to carrying each orthogonal sub-carriers described in data message, each ofdm signal is obtained；The data message includes the data symbol；The block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers；
Communication interface, for each ofdm signal described in transmitted in parallel.
6th aspect is to provide a kind of data sink, and applied to utilization, each orthogonal sub-carriers is transmitted in the orthogonal frequency division multiplex OFDM system of data, including：
Communication interface, for receiving each ofdm signal parallel；
Memory, for depositing program；
Processor, performs described program, for：OFDM demodulation is carried out to each ofdm signal of reception, each OFDM demodulation signal is obtained；The orthogonal sub-carriers included using each block of sub-carriers, are extracted to each described OFDM demodulation signal respectively, obtain each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers is included；Enter planetary demodulation to each data symbol, obtain each coded sequence at least one coded sequence；Using being configured to reduce PAPR transmission code collection in advance, each coded sequence is decoded, the corresponding data block of each block of sub-carriers is obtained；The data block corresponding to each block of sub-carriers is integrated, and obtains binary bit sequence；Each block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that each block of sub-carriers is included is 2 power.
Data transmission method for uplink provided in an embodiment of the present invention, data receiver method and device, by right in advance
The orthogonal sub-carriers of each in ofdm system are grouped, obtain block of sub-carriers, the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power, the orthogonal sub-carriers quantity that transmitting terminal is included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtain each data block, so as to utilize the transmission code collection for being configured to reduction PAPR in advance, sequential coding is carried out to each data block respectively, and received accordingly in receiving terminal, due to being grouped in advance to each orthogonal sub-carriers, obtain each block of sub-carriers of the quantity of the orthogonal sub-carriers included for 2 power, and corresponding piecemeal processing is carried out to binary bit sequence, so as to improve orthogonal sub-carriers utilization rate in an ofdm system, solve relatively low using the utilization rate of the orthogonal sub-carriers caused by sequential coding reduction PAPR, the limited technical problem of code length. Brief description of the drawings is in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
The schematic flow sheet for the data transmission method for uplink that Fig. 1 provides for one embodiment of the invention；
The schematic flow sheet for the data transmission method for uplink that Fig. 2 provides for another embodiment of the present invention；
The schematic flow sheet for the data receiver method that Fig. 3 provides for one embodiment of the invention；
The schematic flow sheet for the data receiver method that Fig. 4 provides for another embodiment of the present invention；
The structural representation for the data sending device that Fig. 5 provides for one embodiment of the invention；
The structural representation for the data sending device that Fig. 6 provides for another embodiment of the present invention；
The structural representation for the data sink that Fig. 7 provides for one embodiment of the invention；
The structural representation for the data sink that Fig. 8 provides for another embodiment of the present invention.Embodiment is to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
The schematic flow sheet for the data transmission method for uplink that Fig. 1 provides for one embodiment of the invention, the data transmission method for uplink can be applied in the ofdm system using each orthogonal sub-carriers transmission data, as shown in figure 1, including：
101st, the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtains data block.
Wherein, block of sub-carriers is that in advance each orthogonal sub-carriers in OFDM systems are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that block of sub-carriers is included is 2 power, and data block is corresponding with block of sub-carriers.
Included according to the X block of sub-carriers 2 kxPower orthogonal sub-carriers, in an OFDM symbol The binary bit sequence to be sent received in cycle carries out piecemeal processing, and it is L to obtain the corresponding data volume of the X block of sub-carriersx=wx+hx X (kx+ l) individual bit data block, wherein
k！
floor[log2(-^-)]
wx= 2,
^ is the bit number of a data symbols carry set in advance, i.e., set in advance to h in ofdm systemxThe coded sequence of individual bit enters planetary modulation and obtains a data symbol, data block Lx2 k included using block of sub-carriers XxPower orthogonal sub-carriers are carried.So as to which within each OFDM symbol cycle, the total amount of data for each data block that the orthogonal sub-carriers in n block of sub-carriers can be carried is：
∑ =∑ {floor[log 2 (^)] + hx X (kx+ 1) } it should be noted that floor represents to round downwards.Allow after encoding different data blocks to be modulated using different constellation modulation systems, so that hxValue it is different and different with the mode of constellation modulation system.
102nd, using being configured to reduce PAPR transmission code collection in advance, sequential coding is carried out to data block, at least one coded sequence is obtained.
103rd, to each coded sequence at least one coded sequence, planetary modulation is entered respectively, each data symbol at least one data symbol is obtained.
104th, using orthogonal sub-carriers corresponding with each data symbol in block of sub-carriers, each data symbol is carried respectively.
Pre-establish the corresponding relation between the orthogonal sub-carriers in block of sub-carriers and data symbol.According to the corresponding relation, using orthogonal sub-carriers corresponding with each data symbol in block of sub-carriers, each data symbol is carried respectively.
105th, 0FDM modulation is carried out to each orthogonal sub-carriers for carrying data message, obtains each 0FDM signal.
Wherein, data message includes data symbol.
106th, each 0FDM signal of transmitted in parallel.
Further, after 104, also pilot frequency sequence is carried using the first orthogonal sub-carriers idle in each described orthogonal sub-carriers.Accordingly, data message also includes pilot frequency sequence.
Wherein, pilot frequency sequence is predetermined so that the PAPR of each 0FDM signal of transmitted in parallel is minimum.
At least one sequence can be predefined as pilot frequency sequence, or in order to ensure the randomness of pilot frequency sequence, Predefine at least two sequences and be used as pilot frequency sequence, within each OFDM symbol cycle, by the strategy pre-established, a sequence is selected from least two sequences, carried using the first orthogonal sub-carriers, a sequence can be also selected from least two sequences at random, is carried using the first orthogonal sub-carriers.For example：The strategy pre-established is that, when pilot frequency sequence includes two sequences, the odd OFDM symbol cycle selects first sequence, is carried using the first orthogonal sub-carriers, and the even OFDM symbols cycle selects second sequence, is carried using the first orthogonal sub-carriers.
Further, before the first orthogonal sub-carriers carrying pilot frequency sequence idle in using each described orthogonal sub-carriers, in addition to pilot frequency sequence is predefined.
Optionally, using monolithic pilot approach, such as in the sequence for specific bit sequence obtain after sequential coding, at least one sequence is selected as the pilot frequency sequence for being emulated, by emulation, it is determined that so that at least one minimum PAPR of each ofdm signal sent sequence is used as pilot frequency sequence；Or the method for exhaustion is such as used, within an OFDM symbol cycle, by emulation, it is determined that so that at least one minimum PAPR of each ofdm signal sent sequence is used as pilot frequency sequence.
Or it is optional using polylith pilot approach, pilot tone is divided into some pilot blocks, every piece of length is identical, and is based on identical specific bit sequence, and each pilot blocks are carried out with different scramblers, identical sequential coding is based respectively on again, such as RM Golay complementary codes, each sequence is obtained, from each sequence, selection causes at least one minimum sequence of the PAPR of ofdm signal after being emulated, be used as pilot frequency sequence.
In order to become apparent from the data transmission method for uplink for illustrating to provide in the present embodiment, the present embodiment also provides a kind of possible embodiment, when in ofdm system within an OFDM symbol cycle, when having 48 orthogonal sub-carriers carrying data messages, binary bit sequence to be sent can be subjected to block encoding, 48 orthogonal sub-carriers are divided into 3 block of sub-carriers in advance, the quantity for the orthogonal sub-carriers that each block of sub-carriers is included is 24 power, i.e., 16.The quantity of the orthogonal sub-carriers included according to each block of sub-carriers, piecemeal is carried out to binary bit sequence, obtain data block, carry out sequential coding, such as RM Golay complementary codes respectively to the data block, it is known that identical constellation modulation system is used in the ofdm system, h=2, then to the carry out QPSK modulation Jing Guo sequential coding, afterwards, the less pilot frequency sequences of PAPR for causing ofdm signal are chosen（0001), in totally 4 the first orthogonal sub-carriers, if subcarrier number is -9, -10,9 and 10, each first orthogonal sub-carriers carry 1 bit, i.e. subcarrier number is -10,0 is carried in -9 and 9 the first orthogonal sub-carriers, 1 is carried in the first orthogonal sub-carriers that subcarrier number is 10.During using such scheme, the PAPR for the superposed signal being formed by stacking based on multiple random signals is not above the principle of the PAPR sums of each random signal, while sequential coding can obtain relatively low PAPR, is led even if block encoding is inserted into Frequently, the PAPR for obtaining ofdm signal is not more than 8. 5dB, hence it is evident that less than the PAPR of existing other technologies.
The embodiment of the present invention to each orthogonal sub-carriers in ofdm system by being grouped in advance, obtain block of sub-carriers, the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power, the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtain data block, so as to utilize the transmission code collection for being configured to reduction PAPR in advance, sequential coding is carried out to data block respectively, and constellation modulation, and carry out parallel output after carrying and OFDM modulation using the subcarrier in the block of sub-carriers, because packet in advance obtains each block of sub-carriers of the quantity of the orthogonal sub-carriers included for 2 power, and then the orthogonal sub-carriers quantity included according to block of sub-carriers, pair each data block corresponding with block of sub-carriers is encoded respectively, solve relatively low using the utilization rate of the orthogonal sub-carriers caused by sequential coding reduction PAPR, the limited technical problem of code length.Simultaneously, during using such scheme, the PAPR for the superposed signal being formed by stacking based on multiple random signals is not above the principle of the PAPR sums of each random signal, sequential coding can obtain relatively low PAPR, even if block encoding is inserted into pilot tone, the PAPR for obtaining ofdm signal also will not be very high.
The schematic flow sheet for the data transmission method for uplink that Fig. 2 provides for another embodiment of the present invention, the data transmission method for uplink can be applied in the ofdm system using each orthogonal sub-carriers transmission data, as shown in Fig. 2 including：
201st, the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtains data block.
Wherein, block of sub-carriers is that in advance each orthogonal sub-carriers in 0FDM systems are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that block of sub-carriers is included is 2 power, and data block is corresponding with block of sub-carriers.
202nd, using being configured to reduce PAPR transmission code collection in advance, sequential coding is carried out to the data block, at least one coded sequence is obtained.
Wherein, it is configured to reduce PAPR transmission code collection, including one in RM Golay complementary codes, M sequences and block code in advance.
203rd, by a coded sequence at least one described coded sequence, it is divided into（M+n) individual coded sequence block, to carry out quadrature amplitude modulation to the coded sequence（Quadrature Ampl itude Modulation, QAM) .203 to 206 are repeated, until each coded sequence at least one coded sequence has carried out QAM modulation. Wherein, m and n is nonnegative integer, and m is more than or equal to
204th, to described（M+n) in individual coded sequence block（M_n) the individual coded sequence block carries out QPSK modulation, obtains（M-n) individual first modulation symbol sequence( '· + 。
Wherein i is the sequence number of first modulation symbol sequence, i=l ... ..., (m-n).
It should be noted that, although in many cases, the modulating performances of PAM types not as QAM modulation,
PSK is modulated, but because its realization is simple, here it is also contemplated that coded sequence is divided into q coded sequence block, carries out two-phase PSK to i-th of coded sequence block respectively（Binary Phase Shift Keying, BPSK) modulation obtains the sequence number that the 3rd modulation symbol sequence wherein 1 is the 3rd modulation symbol sequence, 1=1 ... ..., q, so that the data symbol I of a progress PAM modulation is superimposed as, wherein,
205th, to described（M+n) the other 2n in the individual coded sequence block coded sequence blocks progress BPSK modulation, 2n the second modulation symbol sequences of acquisition ,+jQ
Wherein f is the sequence number of second modulation symbol sequence, f=l ... ..., 2n.
206th, will（M-n) individual first modulation symbol sequence('+^') and 2 η the second modulation symbol sequences
( 、 Υ 2!'(/. + jQ.) +V 2f (lf + jQf )
(/¾- + J¾-}, be overlapped according to ^, obtain corresponding with the binary bit sequence block data symbol (+ 。
For example：If desired 16QAM modulation is carried out to coded sequence, the coded sequence can be divided into two coded sequence blocks, QPSK is carried out to two coded sequence blocks（Quadrature Phase Shift Keying, QPSK) modulation, two modulation symbol sequences are obtained, are designated as respectively（L+jQj and (I2+jQ2) .By two modulation symbol sequences according to I+jQ=2 (L+jQj+(I2+jQ2) be overlapped, obtain the data symbol I+jQ for carrying out 16QAM modulation.QAM modulation is carried out by the above method, code rate can be improved.
207th, judge whether the constellation modulation that the corresponding target data symbol of predetermined second orthogonal sub-carriers in the block of sub-carriers is carried out is pulse amplitude modulation（Pulse Amplitude Modulation, PAM) or QAM modulation, if PAM modulation or QAM modulation, perform 208 and 209, otherwise, perform 210 to 212 ο
Wherein, constellation modulation includes at least one in BPSK modulation, QPSK modulation, QAM modulation and PAM modulation.BPSK is modulated and QPSK modulation belongs to n phase phase-shift keying (PSK)s（n Phase Shift Keying, NPSK) modulation type, QPSK falls within QAM types simultaneously.
From at least one described data symbol, the corresponding target data symbol of predetermined second orthogonal sub-carriers in the block of sub-carriers is determined, judges whether the constellation modulation that the corresponding target data symbol of predetermined second orthogonal sub-carriers in the block of sub-carriers is carried out is PAM modulation or QAM modulation.
If the 208, the target data symbol is to carry out PAM modulation or QAM modulation acquisition, according to ratio between the performance number of the target data symbol and the performance number of the pilot frequency sequence, the target data symbol and the pilot frequency sequence are overlapped, first is obtained and is superimposed symbol.
If the target data symbol is to carry out PAM modulation or QAM modulation acquisition, according to ratio α between the performance number of target data symbol and the performance number of pilot frequency sequence2, by target data symbol（+ j X cU and pilot frequency sequence（Pz+j'X pa) superposition, obtain first and be superimposed symbol
(di+j X do) + α X (pr+j X po) = ( a X Pl+di ) + j X ( a X pQ+dQ) 。
209th, the described first superposition symbol is carried using second orthogonal sub-carriers.
If the 210, the target data symbol is to carry out nPSK modulation to obtain, according to the performance number of pilot frequency sequence and the performance number of target data symbol, phase angle is determined.
For example：If the method for determination can be that ratio is α between the performance number of target data symbol and the performance number of pilot frequency sequence2, then the ratio between anglec of rotation between the angle at the phase angle of rotation and adjacent constellation point is about l/ α.
211st, according to the phase angle of determination and the pilot frequency sequence, phase place is carried out to the target data symbol, the second superposition symbol after phase place is obtained.
For example：According to the value of pilot frequency sequence, determine that target data symbol carries out the direction of phase place, rotate counterclockwise when such as pilot tone is 1 turns clockwise when -1.
212nd, the second superposition symbol after phase place is carried using the second orthogonal sub-carriers.
213rd, orthogonal sub-carriers corresponding with each data symbol in the block of sub-carriers are utilized, each data symbol is carried respectively, and OFDM modulation is carried out to carrying each orthogonal sub-carriers described in data message, obtain each ofdm signal.
Wherein, data message includes the second superposition symbol after data symbol, phase place and/or the first superposition symbol.
214th, each 0FDM signal of transmitted in parallel.
The embodiment of the present invention obtains block of sub-carriers, the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power, according to block of sub-carriers by being grouped in advance to each orthogonal sub-carriers in 0FDM systems Comprising orthogonal sub-carriers quantity, piecemeal processing is carried out to sent binary bit sequence, obtain data block, so as to utilize the transmission code collection for being configured to reduction PAPR in advance, sequential coding is carried out to data block respectively, and constellation modulation, and carry out parallel output after carrying and OFDM modulation using the subcarrier in the block of sub-carriers, because packet in advance obtains each block of sub-carriers of the quantity of the orthogonal sub-carriers included for 2 power, and then the orthogonal sub-carriers quantity included according to block of sub-carriers, pair each data block corresponding with block of sub-carriers is encoded respectively, solve relatively low using the utilization rate of the orthogonal sub-carriers caused by sequential coding reduction PAPR, the limited technical problem of code length.Simultaneously, during using such scheme, the PAPR for the superposed signal being formed by stacking based on multiple random signals is not above the principle of the PAPR sums of each random signal, sequential coding can obtain relatively low PAPR, even if block encoding is inserted into pilot tone, the PAPR for obtaining ofdm signal also will not be very high.
The schematic flow sheet for the data receiver method that Fig. 3 provides for one embodiment of the invention, the data receiver method can be applied in the ofdm system using each orthogonal sub-carriers transmission data, as shown in figure 3, including：
301st, each ofdm signal is received parallel.
302nd, 0FDM demodulation is carried out to each 0FDM signal of reception, obtains each 0FDM demodulated signal.
303rd, the orthogonal sub-carriers included using block of sub-carriers, are extracted to each described 0FDM demodulated signal respectively, obtain the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included.
Wherein, block of sub-carriers is a block of sub-carriers in each block of sub-carriers for carried out in advance to each described orthogonal sub-carriers packet acquisition, and the quantity for the orthogonal sub-carriers that block of sub-carriers is included is 2 power；The quantity of each block of sub-carriers is two or more, accordingly, is two or more with the one-to-one data block of block of sub-carriers.
304th, enter planetary demodulation to the data symbol, obtain coded sequence.
305th, using being configured to reduce PAPR transmission code collection in advance, the coded sequence is decoded, data block is obtained.
Using be configured in advance reduce PAPR transmission code collection, for example：RM Golay complementary codes, M sequence and block code, are decoded to each coded sequence, obtain the corresponding data block of each block of sub-carriers.
306th, data block is integrated, obtains binary bit sequence.
Further, after 302, also using predetermined first orthogonal sub-carriers in each described orthogonal sub-carriers, each described 0FDM demodulated signal is extracted, the first pilot frequency sequence is obtained.
Accordingly, the orthogonal sub-carriers included using block of sub-carriers in 303, respectively to each described 0FDM Demodulated signal is extracted, obtaining the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included includes, the orthogonal sub-carriers included using the block of sub-carriers, each described OFDM demodulation signal is extracted respectively according to first pilot frequency sequence, the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included is obtained.
The embodiment of the present invention to each orthogonal sub-carriers in ofdm system by being grouped in advance, obtain block of sub-carriers, the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power, the orthogonal sub-carriers quantity included according to block of sub-carriers, carry out decode corresponding with transmitting terminal, because packet in advance obtains each block of sub-carriers of the quantity of the orthogonal sub-carriers included for 2 power, and then the orthogonal sub-carriers quantity included according to block of sub-carriers, decoded respectively, solve relatively low using the utilization rate of the orthogonal sub-carriers caused by sequential coding reduction PAPR, the limited technical problem of code length.
The schematic flow sheet for the data receiver method that Fig. 4 provides for another embodiment of the present invention, the data receiver method can be applied in the ofdm system using each orthogonal sub-carriers transmission data, as shown in figure 4, including：
401st, each ofdm signal is received parallel.
402nd, 0FDM demodulation is carried out to each 0FDM signal of reception, obtains each 0FDM demodulated signal.
Whether the constellation modulation that the data symbol the 403rd, judged in transmitting terminal superimposed pilot sequence is carried out is PAM modulation or QAM modulation, if PAM modulation or QAM modulation, perform 404 to 406, otherwise, performs 407 to 410.
404th, using predetermined second orthogonal sub-carriers in the block of sub-carriers, each described 0FDM demodulated signal is extracted, the first superposition symbol that second orthogonal sub-carriers are carried is obtained.
405th, pilot tone recovery is carried out according to the first superposed signal, obtains the second pilot frequency sequence.
If transmitting terminal carries pilot frequency sequence using single first orthogonal sub-carriers, it is easy to extract pilot frequency sequence in receiving terminal, if but employ superimposed pilot mode in transmitting terminal and carried, due to pilot frequency sequence and data symbol the first superposed signal of superimposed composition, the correct extraction and demodulation of first superposed signal again rely on being properly received for pilot frequency sequence, therefore the related content for needing to refer to superimposed pilot technique is further analyzed, so as to recover pilot frequency sequence.
406th, according to the second pilot frequency sequence, the orthogonal sub-carriers included using block of sub-carriers are extracted to each 0FDM demodulated signal respectively, obtain the data symbol for the orthogonal sub-carriers carrying that block of sub-carriers is included.
For example：In receiving terminal, it is necessary to Phase Tracking be carried out using the pilot frequency sequence recovered, so as to extract The data message of orthogonal sub-carriers carrying, if determining that the phase place of data message is Φ according to pilot frequency sequence, ignores the influence of noise and interference, then the data message of the orthogonal sub-carriers carrying before Phase Tracking is i+j
X Q= [pi+di+j X (PQ+C!Q) ] X ej Φ, therefore 1=(pi+di) X cos Φ (pQ+dQ) X sin Φ, 0=(ρΙ+άΙ) ΧδΐηΦ + (Ρο+ά0) Xcos l).The first superposed signal carried particularly for i-th of orthogonal sub-carriers, u=cos Φ, ν=δη Φ, then u2+ v=l, substitutes into above-mentioned I and Q, L=(pn+dn) X u- (pQi+dQi) X v, (ρπ+dn) X v+ (pQi+dQi) X uo therefore can obtain Qi X u- L X v=pQi+dQi, Ι ι Χ υ+Ο ι Χ ν=ρπ+ π ο wherein Ii, Qi, Pu, pQiFor datum, du, dQi, u, v is unknown number.If one has N number of orthogonal sub-carriers, there is (2N+1) individual equation,（2N+2) individual unknown number is, it is necessary to further plus the constellation modulation of the transmitting terminal progress constraint of itself, could estimate data message, such as the data symbol d that BPSK modulation and PAM are modulatedQiThe data symbol of=0, QPSK modulation | |=| dQi|, the data symbol of remaining QAM modulation can only be chosen among limited planisphere point set etc..Can also first it estimate before Phase Tracking and dQi, then estimate u and v, then data symbol is estimated again, this process can be iterated, improve precision.If such as BPSK modulation, then dQi=0, v0U and V can be estimated using least square method, if f (u, V)=∑ ^ X u-L X v-Pi) 2Then when X ∑s [(QiXu-LXv-pi) XQJ=0 of 3f/3u=2, and evaluated error is minimum during 3f/3v=- 2X ∑s [(Qi Xu-Ii X v-pi) Xli]=0, try to achieve LKE I X EQJ (E liXQj X E li), v=(∑ IiXQi) X (∑Qi)-(∑Qi 2) X (∑Ii), further according to u2+v2U, v are normalized=l, then can try to achieve the data symbol after Phase Tracking by d^IiXu+QiXv, that is, the data symbol extracted.
407th, using predetermined second orthogonal sub-carriers in the block of sub-carriers, to it is described each
0FDM demodulated signals are extracted, and obtain the second superposition symbol that second orthogonal sub-carriers are carried.
408th, according to predetermined phase angle, pilot tone recovery is carried out to the described second superposition symbol, the 3rd pilot frequency sequence is obtained.
409th, according to the 3rd pilot frequency sequence, the orthogonal sub-carriers included using block of sub-carriers are extracted to each 0FDM demodulated signal respectively, obtain the data symbol for the orthogonal sub-carriers carrying that block of sub-carriers is included.
Specific extracting method refers to the corresponding description in 406.
411st, enter planetary demodulation to data symbol, obtain coded sequence.
412nd, using being configured to reduce PAPR transmission code collection in advance, the coded sequence is decoded, data block is obtained. 413rd, data block is integrated, obtains binary bit sequence.
The embodiment of the present invention is grouped to each orthogonal sub-carriers in ofdm system in advance by transmitting terminal, obtain block of sub-carriers, the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power, the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtain data block, so as to utilize the transmission code collection for being configured to reduction PAPR in advance, sequential coding is carried out to data block respectively, and constellation modulation, and carry out parallel output after carrying and OFDM modulation using the subcarrier in the block of sub-carriers, received accordingly in receiving terminal, because packet in advance obtains each block of sub-carriers of the quantity of the orthogonal sub-carriers included for 2 power, and then the orthogonal sub-carriers quantity included according to block of sub-carriers, pair each data block corresponding with block of sub-carriers is encoded respectively, solve relatively low using the utilization rate of the orthogonal sub-carriers caused by sequential coding reduction PAPR, the limited technical problem of code length.Simultaneously, during using such scheme, the PAPR for the superposed signal being formed by stacking based on multiple random signals is not above the principle of the PAPR sums of each random signal, sequential coding can obtain relatively low PAPR, even if block encoding is inserted into pilot tone, the PAPR for obtaining ofdm signal also will not be very high.
The structural representation for the data sending device that Fig. 5 provides for one embodiment of the invention, the data sending device can be located at the transmitting terminal of ofdm system, the data sending device can be applied in the ofdm system using each orthogonal sub-carriers transmission data, as shown in figure 5, including：Piecemeal processing module 51, sequential coding module 52, constellation modulation module 53, the first carrier module 54, modulation module 55 and sending module 56.
Piecemeal processing module 51, for the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, data block is obtained.
Wherein, block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers.
Optionally, piecemeal processing module 51 specifically for included according to the X block of sub-carriers 2 kxPower orthogonal sub-carriers, carry out piecemeal processing, it is L to obtain the corresponding data volume of the X block of sub-carriers to the binary bit sequence to be sent within an OFDM symbol cyclex=wx+hx X ( kx+ l) individual bit data block, wherein
k I
floor[\og2 (-^-)]
wx= 2,
hxTo be set in advance to h in the ofdm systemxThe coded sequence of individual bit enters planetary modulation and obtains a data symbol；Floor represents to round downwards. Sequential coding module 52, is connected with piecemeal processing module 51, for using being configured to reduce PAPR transmission code collection in advance, carrying out sequential coding to the data block, obtaining at least one coded sequence.
Constellation modulation module 53, is connected with sequential coding module 52, for each coded sequence at least one described coded sequence, entering planetary modulation respectively, obtains at least one data symbol.
If constellation modulation module 53 is modulated to QAM modulation specifically for the constellation, a coded sequence at least one described coded sequence is divided into（M+n) individual coded sequence block；Wherein, m and n is nonnegative integer, and m is more than or equal to n;To described（M+n) in individual coded sequence block（M_n) the individual coded sequence block carries out QPSK modulation, obtains（M-n) individual first modulation symbol sequence(^), wherein i is the sequence number of first modulation symbol sequence, i=l ... ..., (m-n)；To described（M+n) other 2 η in the individual coded sequence block coded sequence blocks carry out BPSK modulation, obtain 2 η the second modulation symbol sequence ^+^ /), wherein f is the sequence number of second modulation symbol sequence, f=l ... ..., 2n;Will（M-n) individual first modulation symbol sequence('+^') and 2 η the second modulation symbol sequence (^+'), according to
Be overlapped, obtain corresponding with the binary bit sequence block data symbol (+).If constellation modulation module 53 is modulated to PAM modulation also particularly useful for the constellation, by a coded sequence at least one described coded sequence, q coded sequence block is divided into；BPSK modulation is carried out to each coded sequence block in the q coded sequence block, the sequence number that the 3rd modulation symbol sequence wherein 1 is the 3rd modulation symbol sequence, 1=1 ... ..., q is obtained;To modulation symbol sequence L according to '=ι
It is overlapped, obtains the data symbol I corresponding with the binary bit sequence block.
First carrier module 54, is connected with constellation modulation module 53, for using orthogonal sub-carriers corresponding with least one described data symbol in the block of sub-carriers, being carried respectively at least one described data symbol.
Modulation module 55, is connected with the first carrier module 54, for carrying out OFDM modulation to carrying each orthogonal sub-carriers described in data message, obtains each ofdm signal；The data message includes the data symbol.
Sending module 56, is connected with modulation module 55, for each ofdm signal described in transmitted in parallel.Further, the data sending device that the present embodiment is provided, in addition to： Second carrier module, is connected with modulation module 55, for carrying pilot frequency sequence using the first orthogonal sub-carriers idle in each described orthogonal sub-carriers.Accordingly, the data message also includes the pilot frequency sequence.
Further, the data sending device that the present embodiment is provided, in addition to：
Determining module, is connected with constellation modulation module 53, for from least one described data symbol, determining the corresponding target data symbol of predetermined second orthogonal sub-carriers in the block of sub-carriers.
First laminating module, it is connected with determining module, if being to carry out PAM modulation or QAM modulation acquisition for the target data symbol, according to ratio between the performance number of the target data symbol and the performance number of the pilot frequency sequence, the target data symbol and the pilot frequency sequence are overlapped, first is obtained and is superimposed symbol；The described first superposition symbol is carried using second orthogonal sub-carriers；
Accordingly, the data message also includes the described first superposition symbol.
Further, the data sending device that the present embodiment is provided, in addition to：
Second laminating module, it is connected with constellation modulation module 53, if being to carry out nPSK modulation to obtain for the target data symbol, according to the phase angle of determination and the pilot frequency sequence, phase place is carried out to the target data symbol, the second superposition symbol after phase place is obtained；The phase angle is determined according to the performance number of pilot frequency sequence with the performance number of target data symbol.
Accordingly, the data message also includes the second superposition symbol after the phase place.
In the present embodiment, by being grouped in advance to each orthogonal sub-carriers in ofdm system, obtain block of sub-carriers, the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power, the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtain data block, so as to utilize the transmission code collection for being configured to reduction PAPR in advance, sequential coding is carried out to data block respectively, and constellation modulation, and carry out parallel output after carrying and OFDM modulation using the subcarrier in the block of sub-carriers, because packet in advance obtains each block of sub-carriers of the quantity of the orthogonal sub-carriers included for 2 power, and then the orthogonal sub-carriers quantity included according to block of sub-carriers, pair each data block corresponding with block of sub-carriers is encoded respectively, solve relatively low using the utilization rate of the orthogonal sub-carriers caused by sequential coding reduction PAPR, the limited technical problem of code length.
The structural representation for the data sending device that Fig. 6 provides for another embodiment of the present invention, the data sending device can be located at the transmitting terminal of ofdm system, the data sending device can be applied in the ofdm system using each orthogonal sub-carriers transmission data, as shown in fig. 6, including：Memory 62, processor 63 and communication interface 61. Memory 62, for depositing program.Specifically, program can include program code, and described program code includes computer-managed instruction.Memory 62 may include high-speed RAM memory, it is also possible to also including nonvolatile memory（Non-volati le memory), for example, at least one magnetic disk storage.
Processor 63, performs described program, for：The orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtains data block；Using being configured to reduce PAPR transmission code collection in advance, sequential coding is carried out to the data block, at least one coded sequence is obtained；To each coded sequence at least one described coded sequence, planetary modulation is entered respectively, at least one data symbol is obtained；Using orthogonal sub-carriers corresponding with least one described data symbol in the block of sub-carriers, at least one described data symbol is carried respectively；OFDM modulation is carried out to carrying each orthogonal sub-carriers described in data message, each ofdm signal is obtained.
Wherein, data message includes the data symbol；The block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers.
Communication interface 61, for each ofdm signal described in transmitted in parallel.
Optionally, on implementing, if communication interface 61, memory 62 and the independent realization of processor 63, communication interface 61, memory 62 and processor 63 can be connected with each other by bus and complete mutual communication.The bus can be industry standard architecture（Industry Standard Architecture, referred to as ISA) bus, sunset fore-telling Tou β apparatus interconnections (Peripheral Component, referred to as PCI) bus or extended industry-standard architecture（Extended Industry Standard Architecture, referred to as EISA) bus etc..The bus can be divided into address bus, data/address bus, controlling bus etc..For ease of representing, only represented in Fig. 6 with a thick line, it is not intended that only one bus or a type of bus.
Optionally, on implementing, if communication interface 61, memory 62 and processor 63 is integrated realizes on one chip, communication interface 61, memory 62 and processor 63 can be completed by internal interface it is identical between communication.
The processor of the present embodiment can be used for realizing that the technical characteristic in the data transmission method for uplink that Fig. 1 and Fig. 2 are provided, each embodiment can be referred to mutually.
In the present embodiment, by being grouped in advance to each orthogonal sub-carriers in ofdm system, obtain block of sub-carriers, the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power, the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, is obtained Data block, so as to utilize the transmission code collection for being configured to reduction PAPR in advance, sequential coding is carried out to data block respectively, and constellation modulation, and carry out parallel output after carrying and OFDM modulation using the subcarrier in the block of sub-carriers, because packet in advance obtains each block of sub-carriers of the quantity of the orthogonal sub-carriers included for 2 power, and then the orthogonal sub-carriers quantity included according to block of sub-carriers, pair each data block corresponding with block of sub-carriers is encoded respectively, solve relatively low using the utilization rate of the orthogonal sub-carriers caused by sequential coding reduction PAPR, the limited technical problem of code length.
The structural representation for the data sink that Fig. 7 provides for one embodiment of the invention, the data sink can be located at the receiving terminal of ofdm system, the data sink can be applied in the ofdm system using each orthogonal sub-carriers transmission data, as shown in fig. 7, comprises：Receiving module 71, demodulation module 72, the first extraction module 73, constellation demodulation module 74, sequential decoding module 75 and integration module 76.
Receiving module 71, for receiving each ofdm signal parallel.
Demodulation module 72, is connected with receiving module 71, carries out OFDM demodulation for each ofdm signal to reception, obtains each OFDM demodulation signal.
First extraction module 73, it is connected with demodulation module 72, for the orthogonal sub-carriers included using block of sub-carriers, each described OFDM demodulation signal is extracted respectively, each data symbol at least one data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included is obtained.
Wherein, block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers.
Optionally, the first extraction module obtains the first superposition symbol that second orthogonal sub-carriers are carried specifically for using predetermined second orthogonal sub-carriers in the block of sub-carriers, being extracted to each described OFDM demodulation signal；Pilot tone recovery is carried out according to the first superposed signal, the second bad ^ of pilot tone sequence is obtained according to the second pilot frequency sequence, the orthogonal sub-carriers included using block of sub-carriers, each described OFDM demodulation signal is extracted respectively, the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included is obtained.
Or it is optional, the first extraction module obtains the second superposition symbol that second orthogonal sub-carriers are carried specifically for using predetermined second orthogonal sub-carriers in the block of sub-carriers, being extracted to each described OFDM demodulation signal；According to predetermined phase angle, line phase reverse rotation is entered to the described second superposition symbol, the second superposition symbol after phase reverse rotation is obtained；After phase reverse rotation Second superposed signal carries out pilot tone recovery, obtains the 3rd pilot frequency sequence；According to the 3rd pilot frequency sequence, the orthogonal sub-carriers included using the block of sub-carriers are extracted to each described OFDM demodulation signal respectively, obtain the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included.
Constellation demodulation module 74, is connected with the first extraction module 73, for entering planetary demodulation to each data symbol, obtains each coded sequence at least one coded sequence.
Sequential decoding module 75, is connected with constellation demodulation module 74, for using being configured to reduce PAPR transmission code collection in advance, being decoded to each coded sequence, obtaining each data block at least one data block.
Module 76 is integrated, is connected with sequential decoding module 75, for being integrated at least one described data block, binary bit sequence is obtained.
Further, the data sink that the present embodiment is provided also includes：
Second extraction module, is connected with demodulation module 72 and the first extraction module 73 is connected, for using predetermined first orthogonal sub-carriers in each described orthogonal sub-carriers, being extracted to each described OFDM demodulation signal, obtaining the first pilot frequency sequence.
Accordingly, first extraction module is specifically for the orthogonal sub-carriers that are included using the block of sub-carriers, each described OFDM demodulation signal is extracted respectively according to the first pilot frequency sequence, the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included is obtained.
Further, described device also includes：
3rd extraction module, it is connected with demodulation module 72 and the first extraction module 73 is connected, for utilizing predetermined second orthogonal sub-carriers in the block of sub-carriers, each described OFDM demodulation signal is extracted, the first superposition symbol that second orthogonal sub-carriers are carried is obtained；Pilot tone recovery is carried out according to the described first superposition symbol, the second pilot frequency sequence is obtained.
Accordingly, first extraction module, specifically for according to second pilot frequency sequence, the orthogonal sub-carriers included using the block of sub-carriers, each described OFDM demodulation signal is extracted respectively, the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included is obtained.
More further, described device also includes：
4th extraction module, it is connected with demodulation module 72 and the first extraction module 73 is connected, for utilizing predetermined second orthogonal sub-carriers in the block of sub-carriers, each described OFDM demodulation signal is extracted, the second superposition symbol that second orthogonal sub-carriers are carried is obtained；According to predetermined phase angle, pilot tone recovery is carried out to the described second superposition symbol, the 3rd pilot frequency sequence is obtained. Accordingly, first extraction module is specifically for according to the 3rd pilot frequency sequence, the orthogonal sub-carriers included using the block of sub-carriers, are extracted to each described OFDM demodulation signal respectively, obtain the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included.
The embodiment of the present invention to each orthogonal sub-carriers in ofdm system by being grouped in advance, obtain block of sub-carriers, the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power, the orthogonal sub-carriers quantity included according to block of sub-carriers, carry out decode corresponding with transmitting terminal, because packet in advance obtains each block of sub-carriers of the quantity of the orthogonal sub-carriers included for 2 power, and then the orthogonal sub-carriers quantity included according to block of sub-carriers, decoded respectively, solve relatively low using the utilization rate of the orthogonal sub-carriers caused by sequential coding reduction PAPR, the limited technical problem of code length.
The structural representation for the data sink that Fig. 8 provides for one embodiment of the invention, the data sink can be located at the receiving terminal of ofdm system, the data sink can be applied in the ofdm system using each orthogonal sub-carriers transmission data, as shown in figure 8, including：Communication interface 81, memory 82 and processor 83.
Communication interface 81, for receiving each ofdm signal parallel；
Memory 82, for depositing program；Specifically, program can include program code, and described program code includes computer-managed instruction.Memory 82 may include high-speed RAM memory, it is also possible to also including nonvolatile memory（Non-volati le memory), for example, at least one magnetic disk storage.
Processor 83, performs described program, for：OFDM demodulation is carried out to each ofdm signal of reception, each OFDM demodulation signal is obtained；The orthogonal sub-carriers included using block of sub-carriers, are extracted to each described OFDM demodulation signal respectively, obtain each data symbol at least one data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included；Enter planetary demodulation to each data symbol, obtain each coded sequence at least one coded sequence；Using being configured to reduce PAPR transmission code collection in advance, each coded sequence is decoded, each data block at least one data block is obtained；At least one described data block is integrated, binary bit sequence is obtained.
Wherein, block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers.
Optionally, on implementing, if communication interface 81, memory 82 and the independent realization of processor 83, communication interface 81, memory 82 and processor 83 can be connected with each other and be completed by bus Mutual communication.The bus can be industry standard architecture（Industry Standard Architecture, referred to as ISA) bus, sunset fore-telling Tou β apparatus interconnections (Peripheral Component, referred to as PCI) bus or extended industry-standard architecture（Extended Industry Standard Architecture, referred to as EISA) bus etc..The bus can be divided into address bus, data/address bus, controlling bus etc..For ease of representing, only represented in Fig. 8 with a thick line, it is not intended that only one bus or a type of bus.
Optionally, on implementing, if communication interface 81, memory 82 and processor 83 is integrated realizes on one chip, communication interface 81, memory 82 and processor 83 can be completed by internal interface it is identical between communication.
The processor of the present embodiment can be used for realizing that the technical characteristic in the data receiver method that Fig. 3 and Fig. 4 are provided, each embodiment can be referred to mutually.
The embodiment of the present invention to each orthogonal sub-carriers in ofdm system by being grouped in advance, obtain block of sub-carriers, the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power, the orthogonal sub-carriers quantity included according to block of sub-carriers, carry out decode corresponding with transmitting terminal, because packet in advance obtains each block of sub-carriers of the quantity of the orthogonal sub-carriers included for 2 power, and then the orthogonal sub-carriers quantity included according to block of sub-carriers, decoded respectively, solve relatively low using the utilization rate of the orthogonal sub-carriers caused by sequential coding reduction PAPR, the limited technical problem of code length.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can be completed by the related hardware of programmed instruction, foregoing program can be stored in a computer read/write memory medium, the program upon execution, performs the step of including above method embodiment；And foregoing storage medium includes：R0M, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although the present invention is described in detail with reference to foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part or all technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the scope of various embodiments of the present invention technical scheme.

Claims (1)

  1. Claims
    1st, a kind of data transmission method for uplink, applied in the orthogonal frequency division multiplex OFDM system that data are transmitted using each orthogonal sub-carriers, it is characterised in that including：
    The orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtain data block, the block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers；
    Using being configured to reduce PAPR transmission code collection in advance, sequential coding is carried out to the data block, at least one coded sequence is obtained；
    To each coded sequence at least one described coded sequence, planetary modulation is entered respectively, at least one data symbol is obtained；Using orthogonal sub-carriers corresponding with least one described data symbol in the block of sub-carriers, at least one described data symbol is carried respectively；OFDM modulation is carried out to carrying each orthogonal sub-carriers described in data message, each OFDM signal is obtained；The data message includes the data symbol；
    Each ofdm signal described in transmitted in parallel.
    2nd, data transmission method for uplink according to claim 1, it is characterised in that the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtains data block, including：
    Included according to the X block of sub-carriers 2 kxPower orthogonal sub-carriers, carry out piecemeal processing, it is L to obtain the corresponding data volume of the X block of sub-carriers to the binary bit sequence to be sent within an OFDM symbol cyclex=wx+hx X ( kx+ l) individual bit data block, wherein
    k I
    floor[\og2 (-^-)]
    wx= 2,
    hxTo be set in advance to h in the ofdm systemxThe coded sequence of individual bit enters planetary modulation and obtains a data symbol；Floor represents to round downwards.
    3rd, data transmission method for uplink according to claim 1, it is characterised in that each coded sequence at least one described coded sequence, enters planetary modulation, obtains at least one data symbol respectively, including：
    If the constellation is modulated to QAM modulation, by the volume of one at least one described coded sequence Code sequence, is divided into（M+n) individual coded sequence block；Wherein, m and n is nonnegative integer, and m>=n;To described（M+n) in individual coded sequence block（M-n) the individual coded sequence block carries out QPSK modulation, obtains（M-n) individual first modulation symbol sequence (^+), wherein i be first modulation symbol sequence sequence number, i=l ... ...,（m-n) ;
    To described（M+n) the other 2n in the individual coded sequence block coded sequence blocks carry out BPSK modulation, 2 η the second modulation symbol sequences (/+^ /) are obtained, wherein f is the sequence number of second modulation symbol sequence, f=l, ..., 2n;
    Will（M-n) individual first modulation symbol sequence (^+^) and 2 η the second modulation symbol sequences( 、 Υ 2!'(/. + jQ.) +Y 2f (lf + jQf )
    (/¾- + J¾-}, be overlapped according to ^, obtain corresponding with the binary bit sequence block data symbol (+ 。
    4th, data transmission method for uplink according to claim 1, it is characterised in that each coded sequence at least one described coded sequence, enters planetary modulation, obtains at least one data symbol respectively, including：
    If the constellation is modulated to PAM modulation, and a code sequence at least one described coded sequence is bad, q coded sequence block is divided into；
    BPSK modulation is carried out to each coded sequence block in the q coded sequence block, the sequence number that the 3rd modulation symbol sequence wherein 1 is the 3rd modulation symbol sequence, 1=1 ... ..., q is obtained;Modulation symbol sequence L is overlapped according to ^ ', the data symbol I corresponding with the binary bit sequence block is obtained.
    5th, the data transmission method for uplink according to claim any one of 1-4, it is characterized in that, it is described to utilize orthogonal sub-carriers corresponding with least one described data symbol in the block of sub-carriers, after being carried respectively at least one described data symbol, in addition to：
    Pilot frequency sequence is carried using the first orthogonal sub-carriers idle in each described orthogonal sub-carriers；Accordingly, the data message also includes the pilot frequency sequence.
    6th, the data transmission method for uplink according to claim any one of 1-4, it is characterised in that each coded sequence at least one described coded sequence, enters planetary modulation respectively, after obtaining at least one data symbol, including：
    From at least one described data symbol, the corresponding target data symbol of predetermined second orthogonal sub-carriers in the block of sub-carriers is determined；
    If the target data symbol is to carry out Ρ Α Μ modulation or QAM modulation acquisition, according to ratio between the performance number of the target data symbol and the performance number of the pilot frequency sequence, by the target data symbol It is overlapped with the pilot frequency sequence, obtains first and be superimposed symbol；The described first superposition symbol is carried using second orthogonal sub-carriers；
    Accordingly, the data message also includes the described first superposition symbol.
    7th, the data transmission method for uplink according to claim any one of 1-4, it is characterized in that, it is described from least one described data symbol, after determining the corresponding target data symbol of predetermined second orthogonal sub-carriers in the block of sub-carriers, in addition to：
    From at least one described data symbol, the corresponding target data symbol of predetermined second orthogonal sub-carriers in the block of sub-carriers is determined；
    If the target data symbol is to carry out nPSK modulation to obtain, according to the phase angle of determination and the pilot frequency sequence, phase place is carried out to the target data symbol, the second superposition symbol after phase place is obtained；The phase angle is determined according to the performance number of pilot frequency sequence and the performance number of target data symbol；
    Accordingly, the data message also includes the second superposition symbol after the phase place.
    8th, the data transmission method for uplink according to claim any one of 1-7, it is characterised in that described to be configured to reduce PAPR transmission code collection, including one in RM Golay complementary codes, M sequence and block code in advance.
    9th, a kind of data receiver method, applied in the orthogonal frequency division multiplex OFDM system that data are transmitted using each orthogonal sub-carriers, it is characterised in that including：
    Each ofdm signal is received parallel；
    OFDM demodulation is carried out to each ofdm signal of reception, each OFDM demodulation signal is obtained；The orthogonal sub-carriers included using each block of sub-carriers, are extracted to each described OFDM demodulation signal respectively, obtain each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers is included；Each block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that each block of sub-carriers is included is 2 power；
    Enter planetary demodulation to each data symbol, obtain each coded sequence at least one coded sequence；
    Using being configured to reduce PAPR transmission code collection in advance, each coded sequence is decoded, the corresponding data block of each block of sub-carriers is obtained；
    The data block corresponding to each block of sub-carriers is integrated, and obtains binary bit sequence.10th, data receiver method according to claim 9, it is characterised in that described pair reception Each ofdm signal carries out OFDM demodulation, after obtaining each OFDM demodulation signal, in addition to：Using predetermined first orthogonal sub-carriers in each described orthogonal sub-carriers, each described OFDM demodulation signal is extracted, the first pilot frequency sequence is obtained；
    Accordingly, the orthogonal sub-carriers included using each block of sub-carriers, each described OFDM demodulated signal is extracted respectively, each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers is included is obtained, including：
    The orthogonal sub-carriers included using the block of sub-carriers, each described OFDM demodulation signal is extracted respectively according to first pilot frequency sequence, each data symbol at least one the described data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included is obtained.
    11st, data receiver method according to claim 9, it is characterized in that, the orthogonal sub-carriers included using each block of sub-carriers, each described OFDM demodulation signal is extracted respectively, before obtaining each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers included, including：
    Using predetermined second orthogonal sub-carriers in the block of sub-carriers, each described OFDM demodulation signal is extracted, the first superposition symbol that second orthogonal sub-carriers are carried is obtained；
    Pilot tone recovery is carried out according to the described first superposition symbol, the second pilot frequency sequence is obtained；
    Accordingly, the orthogonal sub-carriers included using each block of sub-carriers, each described OFDM demodulated signal is extracted respectively, each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers is included is obtained, including：
    According to second pilot frequency sequence, the orthogonal sub-carriers included using the block of sub-carriers are extracted to each described OFDM demodulation signal respectively, obtain the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included.
    12nd, data receiver method according to claim 9, it is characterized in that, the orthogonal sub-carriers included using each block of sub-carriers, each described OFDM demodulation signal is extracted respectively, before obtaining each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers included, including：
    Using predetermined second orthogonal sub-carriers in the block of sub-carriers, each described OFDM demodulation signal is extracted, the second superposition symbol that second orthogonal sub-carriers are carried is obtained；
    According to predetermined phase angle, pilot tone recovery is carried out to the described second superposition symbol, the 3rd pilot frequency sequence is obtained； Accordingly, the orthogonal sub-carriers included using each block of sub-carriers, each described OFDM demodulated signal is extracted respectively, each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers is included is obtained, including：
    According to the 3rd pilot frequency sequence, the orthogonal sub-carriers included using the block of sub-carriers are extracted to each described OFDM demodulation signal respectively, obtain the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included.
    13rd, the data receiver method according to claim any one of 9-12, it is characterised in that described to be configured to reduce PAPR transmission code collection, including one in RM Golay complementary codes, M sequence and block code in advance.
    14th, a kind of data sending device, applied in the orthogonal frequency division multiplex OFDM system that data are transmitted using each orthogonal sub-carriers, it is characterised in that including：
    Piecemeal processing module, for the orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtain data block, the block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers；
    Sequential coding module, for using being configured to reduce PAPR transmission code collection in advance, carrying out sequential coding to the data block, obtaining at least one coded sequence；
    Constellation modulation module, for each coded sequence at least one described coded sequence, entering planetary modulation respectively, obtains at least one data symbol；
    First carrier module, for using orthogonal sub-carriers corresponding with least one described data symbol in the block of sub-carriers, being carried respectively at least one described data symbol；
    Modulation module, for carrying out OFDM modulation to carrying each orthogonal sub-carriers described in data message, obtains each ofdm signal；The data message includes the data symbol；
    Sending module, for each ofdm signal described in transmitted in parallel.
    15th, data sending device according to claim 14, it is characterised in that
    The piecemeal processing module specifically for included according to the X block of sub-carriers 2 kxPower orthogonal sub-carriers, carry out piecemeal processing, it is L to obtain the corresponding data volume of the X block of sub-carriers to the binary bit sequence to be sent within an OFDM symbol cyclex=wx+hx X ( kx+ l) individual bit data block, wherein
    k I
    floor[\og2(-^-)]
    wx=2, hxTo be set in advance to h in the ofdm systemxThe coded sequence of individual bit enters planetary modulation and obtains a data symbol；Floor represents to round downwards.
    16th, data sending device according to claim 14, it is characterised in that
    If the constellation modulation module is modulated to QAM modulation specifically for the constellation, a coded sequence at least one described coded sequence is divided into（M+n) individual coded sequence block；Wherein, m and n is nonnegative integer, and m>=n;To described（M+n) in individual coded sequence block（M_n) the individual coded sequence block carries out QPSK modulation, obtains（M-n) individual first modulation symbol sequence(^), wherein i is the sequence number of first modulation symbol sequence, i=l ... ..., (m-n)；To described（M+n) other 2 η in the individual coded sequence block coded sequence blocks progress BPSK modulation, 2 η the second modulation symbol sequences of acquisition (+^), wherein f is the sequence number of second modulation symbol sequence, f=l ... ..., 2n;Will
    (m-n) individual first modulation symbol sequence (^+^') and 2 η the second modulation symbol sequences+), root
    Υ 2!'(/; + )+ί2ί( + iQf )
    According to ^1It is overlapped, obtains the data symbol ^+^ corresponding with the binary bit sequence block).
    17th, data sending device according to claim 14, it is characterised in that
    If the constellation modulation module is modulated to PAM modulation specifically for the constellation, by a coded sequence at least one described coded sequence, q coded sequence block is divided into；BPSK modulation is carried out to each coded sequence block in the q coded sequence block, the 3rd modulation symbol sequence wherein 1 is obtained
    Υ2ι~ be the 3rd modulation symbol sequence sequence number, 1=1 ... ..., q;To modulation symbol sequence L according to ^1It is overlapped, obtains the data symbol I corresponding with the binary bit sequence block.
    18th, the data sending device according to claim any one of 14-17, it is characterised in that described device also includes：
    Second carrier module, for carrying pilot frequency sequence using the first orthogonal sub-carriers idle in each described orthogonal sub-carriers；
    Accordingly, the data message also includes the pilot frequency sequence.
    19th, the data sending device according to claim any one of 14-17, it is characterised in that described device also includes：
    Determining module, for from least one described data symbol, determining the corresponding target data symbol of predetermined second orthogonal sub-carriers in the block of sub-carriers；
    First laminating module, if being to carry out PAM modulation or QAM modulation acquisition for the target data symbol, according to ratio between the performance number of the target data symbol and the performance number of the pilot frequency sequence, the target data symbol and the pilot frequency sequence are overlapped, first is obtained and is superimposed symbol；Using institute The second orthogonal sub-carriers are stated to carry the described first superposition symbol；
    Accordingly, the data message also includes the described first superposition symbol.
    20th, the data sending device according to claim any one of 14-17, it is characterised in that described device also includes：
    Determining module, for from least one described data symbol, determining the corresponding target data symbol of predetermined second orthogonal sub-carriers in the block of sub-carriers；
    Second laminating module, if being to carry out nPSK modulation to obtain for the target data symbol, according to the phase angle of determination and the pilot frequency sequence, phase place is carried out to the target data symbol, the second superposition symbol after phase place is obtained；The phase angle is determined according to the performance number of pilot frequency sequence and the performance number of target data symbol；
    Accordingly, the data message also includes the second superposition symbol after the phase place.
    21st, a kind of data sink, applied in the orthogonal frequency division multiplex OFDM system that data are transmitted using each orthogonal sub-carriers, it is characterised in that including：
    Receiving module, for receiving each ofdm signal parallel；
    Demodulation module, carries out OFDM demodulation for each ofdm signal to reception, obtains each OFDM demodulated signal；
    First extraction module, for the orthogonal sub-carriers included using each block of sub-carriers, each described OFDM demodulation signal is extracted respectively, each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers is included is obtained；Each block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that each block of sub-carriers is included is 2 power；
    Constellation demodulation module, for entering planetary demodulation to each data symbol, obtains each coded sequence at least one coded sequence；
    Sequential decoding module, for using being configured to reduce PAPR transmission code collection in advance, being decoded to each coded sequence, obtains the corresponding data block of each block of sub-carriers；
    Module is integrated, for being integrated to the corresponding data block of each block of sub-carriers, acquisition binary bit sequence.
    22nd, data sink according to claim 21, it is characterised in that described device also includes：
    Second extraction module, for utilizing predetermined first positive jiao zi in each described orthogonal sub-carriers Carrier wave, is extracted to each described OFDM demodulation signal, obtains the first pilot frequency sequence；Accordingly, first extraction module is specifically for the orthogonal sub-carriers that are included using the block of sub-carriers, each described OFDM demodulation signal is extracted respectively according to the first pilot frequency sequence, the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included is obtained.
    23rd, data sink according to claim 21, it is characterised in that described device also includes：
    3rd extraction module, for using predetermined second orthogonal sub-carriers in the block of sub-carriers, being extracted to each described OFDM demodulation signal, obtains the first superposition symbol that second orthogonal sub-carriers are carried；Pilot tone recovery is carried out according to the described first superposition symbol, the second pilot frequency sequence is obtained；
    Accordingly, first extraction module is specifically for according to second pilot frequency sequence, the orthogonal sub-carriers included using the block of sub-carriers, are extracted to each described OFDM demodulation signal respectively, obtain the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included.
    24th, data sink according to claim 21, it is characterised in that described device also includes：
    4th extraction module, for using predetermined second orthogonal sub-carriers in the block of sub-carriers, being extracted to each described OFDM demodulation signal, obtains the second superposition symbol that second orthogonal sub-carriers are carried；According to predetermined phase angle, pilot tone recovery is carried out to the described second superposition symbol, the 3rd pilot frequency sequence is obtained；
    Accordingly, first extraction module is specifically for according to the 3rd pilot frequency sequence, the orthogonal sub-carriers included using the block of sub-carriers, are extracted to each described OFDM demodulation signal respectively, obtain the data symbol for the orthogonal sub-carriers carrying that the block of sub-carriers is included.
    25th, a kind of data sending device, applied in the orthogonal frequency division multiplex OFDM system that data are transmitted using each orthogonal sub-carriers, it is characterised in that including：
    Memory, for depositing program；
    Processor, performs described program, for：The orthogonal sub-carriers quantity included according to block of sub-carriers, piecemeal processing is carried out to sent binary bit sequence, obtains data block；Using being configured to reduce PAPR transmission code collection in advance, sequential coding is carried out to the data block, at least one coded sequence is obtained；To each coded sequence at least one described coded sequence, planetary modulation is entered respectively, at least one data symbol is obtained；Using orthogonal sub-carriers corresponding with least one described data symbol in the block of sub-carriers, at least one described data symbol is carried respectively；To carrying data Each described orthogonal sub-carriers of information carry out OFDM modulation, obtain each ofdm signal；The data message includes the data symbol；The block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that the block of sub-carriers is included is 2 power；The data block is corresponding with the block of sub-carriers；
    Communication interface, for each ofdm signal described in transmitted in parallel.
    26th, a kind of data sink, applied in the orthogonal frequency division multiplex OFDM system that data are transmitted using each orthogonal sub-carriers, it is characterised in that including：
    Communication interface, for receiving each ofdm signal parallel；
    Memory, for depositing program；
    Processor, performs described program, for：OFDM demodulation is carried out to each ofdm signal of reception, each OFDM demodulation signal is obtained；The orthogonal sub-carriers included using each block of sub-carriers, are extracted to each described OFDM demodulation signal respectively, obtain each data symbol at least one data symbol for the orthogonal sub-carriers carrying that each block of sub-carriers is included；Enter planetary demodulation to each data symbol, obtain each coded sequence at least one coded sequence；Using being configured to reduce PAPR transmission code collection in advance, each coded sequence is decoded, the corresponding data block of each block of sub-carriers is obtained；The data block corresponding to each block of sub-carriers is integrated, and obtains binary bit sequence；Each block of sub-carriers is that in advance each described orthogonal sub-carriers are carried out with packet acquisition, and the quantity for the orthogonal sub-carriers that each block of sub-carriers is included is 2 power.
CN201380076062.4A 2013-09-02 2013-09-02 Method for data transmission, method for data reception, and device Pending CN105164987A (en)

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