CN104243383A - Data transmitting method and device and data receiving method and device - Google Patents

Data transmitting method and device and data receiving method and device Download PDF

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Publication number
CN104243383A
CN104243383A CN201310239650.7A CN201310239650A CN104243383A CN 104243383 A CN104243383 A CN 104243383A CN 201310239650 A CN201310239650 A CN 201310239650A CN 104243383 A CN104243383 A CN 104243383A
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ofdm symbol
carriers
target sub
filling bit
bit
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CN104243383B (en
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刘永俊
李蕊
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Shuntong Shandong Supply Chain Management Group Co ltd
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Huawei Technologies Co Ltd
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Abstract

The embodiment of the invention provides a data transmitting method and device and a data receiving method and device. The data transmitting method comprises the steps that according to the total number of filling bits corresponding to data to be transmitted and the total number of OFDM symbols needing to be formed through modulation, the number of the filling bits contained by each OFDM symbol is determined, and according to the number of the filling bits contained by each OFDM symbol and a preset constellation modulation mode, the number of the target subcarriers used for bearing the filling bits and the number of the filling bits needing to be borne by each target subcarrier in each OFDM symbol are determined; in this way, according to the constellation modulation mode, the filling bits needing to be contained by each OFDM symbol are modulated to the target subcarriers in the OFDM symbol, after constellation modulation is conducted on the sequence of the bits corresponding to all the subcarriers, OFDM modulation is conducted, and the OFDM symbols are obtained, and then the OFDM symbols are transmitted. According to the data transmitting method and device and the data receiving method and device, PAPR can be reduced, and various defects caused ultrahigh PAPR are overcome.

Description

Data transmission method for uplink, method of reseptance and equipment
Technical field
The embodiment of the present invention relates to the communication technology, particularly relates to a kind of data transmission method for uplink, method of reseptance and equipment.
Background technology
Although 802.11 standards have become one of main flow direction of global radio network Development, but be wirelessly connected to each other (Wireless Fidelity, referred to as Wi-Fi) technology work loss-rate is higher, and the wireless connections be applicable between computer are connected application with other high-speed radios.Wi-Fi is carried out low-power consumption optimization lower for transmission rate, be a kind of development trend in the scene that transmitted data amount is very little, such as, be applied to wireless senser.Orthogonal frequency division multiplexi (Orthogonal Frequency Division Multiplexing, referred to as OFDM) is a kind of multi-carrier modulation, is overcome the frequency selective fading of channel by the impact reduced and eliminate intersymbol interference.At IEEE-USA (Institute of Electrical and Electronics Engineers, referred to as IEEE) 802.15.4g Wireless Fidelity (Wireless Fidelity, referred to as WiFi) and worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, referred to as Wimax) in standard, have employed OFDM modulation mode.
Because ofdm signal is formed by stacking by multiple separate subcarrier, when each sub-carrier phase is identical or close, superposed signal just can be subject to the modulation of identical initial phase signal, thus produce larger instantaneous power peak value, bring higher papr (Peak to Average Power Ratio, referred to as PAPR) further.Because the dynamic range of general power amplifier is all limited, so the ofdm signal very easily ingoing power amplifier nonlinearity region that PAPR is larger, signal is caused to produce nonlinear distortion, obvious spread spectrum is caused to disturb and inband signaling distortion, the frequency spectrum of superposed signal is changed, thus causes the orthogonality between each sub-carrier signal to be destroyed, produce and mutually disturb, make system performance degradation, obstacle be also result in low-power consumption optimization.Therefore, the problem solving high PAPR in OFDM technology is badly in need of.
Summary of the invention
The embodiment of the present invention provides a kind of data transmission method for uplink, method of reseptance and equipment, in order to solve the problem of high PAPR in existing OFDM technology.
First aspect provides a kind of data transmission method for uplink, comprising:
According to total number of the orthogonal frequency division multiplexi OFDM symbol that sum and the described data to be sent of filling bit corresponding to data to be sent should be modulated into, determine that each OFDM symbol needs the number of the filling bit comprised;
Need the number of the filling bit comprised according to the constellation modulation system preset and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the number and each target sub-carriers carrying the target sub-carriers of filling bit;
According to the number of the filling bit that number and each target sub-carriers needs of target sub-carriers in each OFDM symbol carry, according to described default constellation modulation system, the filling bit comprised is needed to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol;
Determine the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers except described target sub-carriers, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains each OFDM symbol;
Send each OFDM symbol.
In conjunction with first aspect, in the first possible implementation of first aspect, the described number according to target sub-carriers in each OFDM symbol and each target sub-carriers need the number of the filling bit of carrying, according to described default constellation modulation system, need the filling bit comprised to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol, comprising:
Determine the number of target sub-carriers in rule and each OFDM symbol according to the position of presetting, determine the position of filling bit in each OFDM symbol;
Need the number of the filling bit of carrying according to each target sub-carriers, according to described default constellation modulation system, the filling bit of respective number is modulated in the target sub-carriers of correspondence position.
In conjunction with the first possible implementation of first aspect, in the implementation that the second of first aspect is possible, described position determines that rule comprises:
According to the numeric order of each OFDM symbol sub-carriers, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of odd number according to sequence number in each OFDM symbol, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of even number according to sequence number in each OFDM symbol, determine the position of filling bit successively.
In conjunction with first aspect, in the third possible implementation of first aspect, before each OFDM symbol of transmission, comprising:
Primary importance mark is carried respectively, the position of primary importance mark for identifying target sub-carriers in each OFDM symbol in each OFDM symbol in the idle bit of each OFDM symbol; Or
Second place mark is carried, the described position of second place mark for identifying target sub-carriers in each OFDM symbol in idle bit in first OFDM symbol.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation of first aspect, described idle bit is not by the bit used in the length field of signal domain.
In conjunction with the third possible implementation of first aspect or the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation of first aspect, described primary importance mark or the described second place are designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing; Or
Described primary importance mark or the described second place are designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
In conjunction with the 5th kind of possible implementation of first aspect or the first possible implementation of first aspect or the possible implementation of the second of first aspect or the third possible implementation of first aspect or the 4th kind of possible implementation of first aspect or first aspect, in the 6th kind of possible implementation of first aspect, the each OFDM symbol of described transmission comprises: based on the principle reducing papr PAPR, send each OFDM symbol; Wherein, the principle of described reduction PAPR comprises: the PAPR of described target sub-carriers when carrying filling bit, lower than PAPR when described target sub-carriers carrying random data, or the PAPR of described target sub-carriers when carrying filling bit, PAPR when not carrying any filling bit and random data lower than described target sub-carriers.
Second aspect provides a kind of data receive method, comprising:
Receive at least one orthogonal frequency division multiplexi OFDM symbol, and OFDM demodulation is carried out to each described OFDM symbol, obtain the OFDM symbol after at least one demodulation;
Determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation, described target sub-carriers carries filling bit;
Position in the OFDM symbol of the target sub-carriers comprised according to the OFDM symbol after each described demodulation after each described demodulation, determines the number of the target sub-carriers that the OFDM symbol after each described demodulation comprises;
The constellation modulation system that OFDM symbol after the number of the target sub-carriers comprised according to the OFDM symbol after all described demodulation and described demodulation adopts, determines the number of the filling bit that each target sub-carriers carries;
According to the number of filling bit of the position in the OFDM symbol of each target sub-carriers after the described demodulation of each target sub-carriers of carrying and the carrying of each target sub-carriers, the filling bit all target sub-carriers carried is deleted from the OFDM symbol after all described demodulation, to obtain the data bit from transmitting terminal that at least one OFDM symbol described is carried.
In conjunction with second aspect, in the first possible implementation of second aspect, described determine each described demodulation after the OFDM symbol of the target sub-carriers that comprises of OFDM symbol after each described demodulation in position, comprising:
Determine rule according to the position of presetting, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
In conjunction with the first possible implementation of second aspect, in the implementation that the second of second aspect is possible, described position determines that rule comprises:
According to the numeric order of OFDM symbol sub-carriers, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of odd number according to sequence number in OFDM symbol, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of even number according to sequence number in OFDM symbol, determine the position of filling bit successively.
In conjunction with second aspect, in the third possible implementation of second aspect, described determine each described demodulation after the OFDM symbol of the target sub-carriers that comprises of OFDM symbol after each described demodulation in position, comprising:
From the OFDM symbol after each described demodulation, obtain primary importance mark, described primary importance mark identifies the position of target sub-carriers in the OFDM symbol after the described demodulation at place for identifying described primary importance;
Identify according to described primary importance, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
In conjunction with the third possible implementation of second aspect, in the 4th kind of possible implementation of second aspect, described primary importance is designated a sequence number in arrangement set, the position of the filling bit that each sequence number correspondence is fixing; Or
Described primary importance is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
In conjunction with second aspect, in the 5th kind of possible implementation of second aspect, described determine each described demodulation after the OFDM symbol of the target sub-carriers that comprises of OFDM symbol after each described demodulation in position, comprising:
The acquisition second place identifies, the described position of second place mark for identifying target sub-carriers in each OFDM symbol;
Identify according to the described second place, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
In conjunction with the 5th kind of possible implementation of second aspect, in the 6th kind of possible implementation of second aspect, described acquisition second place mark, comprising:
If the OFDM symbol after current described demodulation is not first OFDM symbol received, then from first OFDM symbol received, obtain described second place mark;
If the OFDM symbol after current described demodulation is the first OFDM symbol received, then from the OFDM symbol after current described demodulation, obtain described second place mark.
In conjunction with the 5th kind of possible implementation of second aspect or the 6th kind of possible implementation of second aspect, in the 7th kind of possible implementation of second aspect, the described second place is designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing; Or
The described second place is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
The third aspect provides a kind of data transmitting equipment, comprising:
First determination module, for total number of orthogonal frequency division multiplexi OFDM symbol that should be modulated into according to sum and the described data to be sent of filling bit corresponding to data to be sent, determines that each OFDM symbol needs the number of the filling bit comprised;
Second determination module, for needing the number of the filling bit comprised according to the constellation modulation system preset and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the number and each target sub-carriers carrying the target sub-carriers of filling bit;
First modulation module, for the number according to the number of target sub-carriers in each OFDM symbol and the filling bit of each target sub-carriers needs carrying, according to described default constellation modulation system, the filling bit comprised is needed to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol;
Second modulation module, for determining the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers except described target sub-carriers, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains each OFDM symbol;
Sending module, for sending each OFDM symbol.
In conjunction with the third aspect, in the first possible implementation of the third aspect, described first modulation module is specifically for determining the number of target sub-carriers in rule and each OFDM symbol according to the position of presetting, determine the position of filling bit in each OFDM symbol, the number of the filling bit of carrying is needed according to each target sub-carriers, according to described default constellation modulation system, the filling bit of respective number is modulated in the target sub-carriers of correspondence position.
In conjunction with the first possible implementation of the third aspect, in the implementation that the second of the third aspect is possible, described position determines that rule comprises:
According to the numeric order of each OFDM symbol sub-carriers, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of odd number according to sequence number in each OFDM symbol, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of even number according to sequence number in each OFDM symbol, determine the position of filling bit successively.
In conjunction with the third aspect, in the third possible implementation of the third aspect, described equipment also comprises: add module, before sending each OFDM symbol at described sending module, primary importance mark is carried respectively in the idle bit of each OFDM symbol, the position of primary importance mark for identifying target sub-carriers in each OFDM symbol in each OFDM symbol, or carry second place mark in the idle bit in first OFDM symbol, the described position of second place mark for identifying target sub-carriers in each OFDM symbol.
In conjunction with the third possible implementation of the third aspect, in the 4th kind of possible implementation of the third aspect, described idle bit is not by the bit used in the length field of signal domain.
In conjunction with the third possible implementation of the third aspect or the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation of the third aspect, described primary importance mark or the described second place are designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing; Or
Described primary importance mark or the described second place are designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
In conjunction with the 5th kind of possible implementation of the third aspect or the first possible implementation of the third aspect or the possible implementation of the second of the third aspect or the third possible implementation of the third aspect or the 4th kind of possible implementation of the third aspect or the third aspect, in the 6th kind of possible implementation of the third aspect, described sending module, specifically for based on the principle reducing papr PAPR, sends each OFDM symbol; Wherein, the principle of described reduction PAPR comprises: the PAPR of described target sub-carriers when carrying filling bit, lower than PAPR when described target sub-carriers carrying random data, or the PAPR of described target sub-carriers when carrying filling bit, PAPR when not carrying any filling bit and random data lower than described target sub-carriers.
Fourth aspect provides a kind of data receiver, comprising:
Receiver module, for receiving at least one orthogonal frequency division multiplexi OFDM symbol;
Demodulation module, for carrying out OFDM demodulation to each described OFDM symbol, obtains the OFDM symbol after at least one demodulation;
First determination module, the position in the OFDM symbol of the target sub-carriers comprised for the OFDM symbol after determining each described demodulation after each described demodulation, described target sub-carriers carries filling bit;
Second determination module, for the position in OFDM symbol after each described demodulation of the target sub-carriers that comprises according to the OFDM symbol after each described demodulation, determines the number of the target sub-carriers that the OFDM symbol after each described demodulation comprises;
3rd determination module, for the constellation modulation system that the OFDM symbol after the number of target sub-carriers that comprises according to the OFDM symbol after all described demodulation and described demodulation adopts, determines the number of the filling bit that each target sub-carriers carries;
Acquisition module, for the number of filling bit according to the position in the OFDM symbol of each target sub-carriers after the described demodulation of each target sub-carriers of carrying and the carrying of each target sub-carriers, the filling bit all target sub-carriers carried is deleted from the OFDM symbol after all described demodulation, to obtain the data bit from transmitting terminal that at least one OFDM symbol described is carried.
In conjunction with fourth aspect, in the first possible implementation of fourth aspect, described first determination module, specifically for determining rule according to the position of presetting, determines the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
In conjunction with the first possible implementation of fourth aspect, in the implementation that the second of fourth aspect is possible, described position determines that rule comprises:
According to the numeric order of OFDM symbol sub-carriers, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of odd number according to sequence number in OFDM symbol, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of even number according to sequence number in OFDM symbol, determine the position of filling bit successively.
In conjunction with fourth aspect, in the third possible implementation of fourth aspect, described first determination module specifically for obtaining primary importance mark from the OFDM symbol after each described demodulation, described primary importance mark identifies the position of target sub-carriers in the OFDM symbol after the described demodulation at place for identifying described primary importance, identify according to described primary importance, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
In conjunction with the third possible implementation of fourth aspect, in the 4th kind of possible implementation of fourth aspect, described primary importance is designated a sequence number in arrangement set, the position of the filling bit that each sequence number correspondence is fixing; Or
Described primary importance is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
In conjunction with fourth aspect, in the 5th kind of possible implementation of fourth aspect, described first determination module is specifically for obtaining second place mark, the described position of second place mark for identifying target sub-carriers in each OFDM symbol, identify according to the described second place, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
In conjunction with the 5th kind of possible implementation of fourth aspect, in the 6th kind of possible implementation of fourth aspect, described first determination module comprises for obtaining second place mark:
If described first determination module is not first OFDM symbol received specifically for the OFDM symbol after current described demodulation, from first OFDM symbol received, then obtain described second place mark, if the OFDM symbol after current described demodulation is the first OFDM symbol received, then from the OFDM symbol after current described demodulation, obtain described second place mark.
In conjunction with the 5th kind of possible implementation of fourth aspect or the 6th kind of possible implementation of fourth aspect, in the 7th kind of possible implementation of fourth aspect, the described second place is designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing; Or
The described second place is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
The data transmission method for uplink that the embodiment of the present invention provides, method of reseptance and equipment, when sending data, according to total number of the OFDM symbol that sum and the data to be sent of filling bit corresponding to data to be sent should be modulated into, first determine that each OFDM symbol needs the filling bit number comprised, the filling bit number comprised is needed again according to the constellation modulation system preset and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the target sub-carriers number and each target sub-carriers carrying filling bit, accordingly, according to the constellation modulation system preset, the filling bit comprised is needed to be modulated in the target sub-carriers in OFDM symbol each OFDM symbol, after again constellation modulation being carried out to the target sub-carriers in each OFDM symbol and bit sequence corresponding to other subcarriers, carry out OFDM modulation again, obtain OFDM symbol, send described OFDM symbol afterwards.In embodiments of the present invention, by filling bit is inserted in OFDM symbol with the form of idle sub-carrier, the redundant data made full use of in OFDM symbol produces the data that can offset with peak value, reaching by reducing peak value the object reducing PAPR, solving the various defects caused because PAPR is higher.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The flow chart of a kind of data transmission method for uplink that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is a kind of schematic diagram of filling bit in prior art;
The schematic diagram of the filling bit that Fig. 3 provides for the embodiment of the present invention;
The flow chart of the data receive method that Fig. 4 provides for the embodiment of the present invention;
The structural representation of a kind of data transmitting equipment that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the another kind of data transmitting equipment that Fig. 6 provides for the embodiment of the present invention;
The structural representation of another data transmitting equipment that Fig. 7 provides for the embodiment of the present invention;
The structural representation of a kind of data receiver that Fig. 8 provides for the embodiment of the present invention;
The structural representation of the another kind of data receiver that Fig. 9 provides for the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, 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 the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The flow chart of a kind of data transmission method for uplink that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, described method comprises:
Total number of the OFDM symbol that 101, should be modulated into according to sum and the described data to be sent of filling bit corresponding to data to be sent, determines that each OFDM symbol needs the number of the filling bit comprised.
The application scenarios of the present embodiment can be system or the network of any use OFDM technology, such as, can be but be not limited to: Wi-Fi network and WiMax network.
In OFDM technology, the sum of the data bit gone out to enable Data Modulation to be sent is divided exactly by the bit number that each OFDM symbol carries, and needs to carry filling bit in OFDM symbol, namely needs to mend with " 0 " Bit String.
Wherein, data transmitting equipment can according to certain algorithm after determining data to be sent, the sum can determining the filling bit that data to be sent are corresponding and total number of OFDM symbol that should be modulated into.Such as, sum filling bit can being determined according to following formula (1)-formula (3) and the total number of OFDM symbol be modulated into.
N SYM=Ceiling((16+8×LENGTH+6)/N DBPS) （1）
N DATA=N SYM×N DBPS （2）
N PAD=N DATA-(16+8×LENGTH+6) （3）
Function Ceiling () refers to get the smallest positive integral of the numerical value be greater than or equal in bracket.Wherein, N sYMfor total number of OFDM symbol, N dATAfor the bit number (sum of the data bit namely gone out by Data Modulation to be sent) in whole data field, N pADfor the sum of filling bit, by physical layer protocol data unit (Physical Protocol Data Unit, referred to as PPDU) length (LENGTH) field of Physical layer convergence protocol service data unit (PLCP Physical service data unit, referred to as PSDU) in frame format calculates.N dBPSfor the bit number that each OFDM symbol carries, by can being learnt by the speed field in PPDU frame format.
Such as, suppose that packet to be sent is containing 100 bytes, or 800 equivalent bits, before these bits, then add service (SERVICE) field of 16 bits in advance, in the end additional 6 tail bits, obtain 822 bits, also need filling bit " 0 ", to obtain an integer OFDM symbol.For employing 16QAM modulation system, when code rate is 3/4, each OFDM symbol can carry 144 data bits, so can obtain the number N of OFDM symbol according to formula (1) sYMfor Ceiling(822/144)=6, so total N of data bit dATAfor N sYM× 144=864.Therefore, what need the filling bit of insertion adds up to 864-822=42 bit " 0 ".
Again such as, suppose that packet to be sent is containing 110 bytes, equivalent 880 bits, add SERVICE field and 6 tail bits of 16 bits, obtain 902 bits, also need filling bit " 0 ", to obtain an integer OFDM symbol.For employing Quadrature Phase Shift Keying (Quadrature Phase Shift Keying, referred to as QPSK) modulation system, when code rate is 3/4, each OFDM symbol can carry 72 data bits, can obtain the number N of OFDM symbol according to formula (1) sYMfor Ceiling(902/72)=13, so total N of data bit dATAfor Ceiling(902/72) × 72=936.Therefore, need to insert 936-902=34 filling bit " 0 ".
After the sum determining the filling bit that described data to be sent are corresponding with total number of the OFDM symbol that should be modulated into, first calculate the number that average each OFDM symbol needs the filling bit comprised.That supposes filling bit adds up to N pAD, N sYMindividual OFDM symbol, then average each OFDM symbol needs the number of the filling bit comprised to be N=floor (N pAD/ N sYM), wherein function f loor () refers to get the smallest positive integral of the numerical value be less than or equal in bracket.
Optionally, if also have remaining filling bit, then can insert last OFDM symbol, or to be put into successively inside OFDM symbol above, the embodiment of the present invention does not limit this.As long as data transmitting equipment and data receiver are made an appointment.
102, need the number of the filling bit comprised according to the constellation modulation system preset and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the number and each target sub-carriers carrying the target sub-carriers of filling bit.
Then, data transmitting equipment calculates the number needing the filling bit of carrying in each OFDM symbol for the number and each subcarrier carrying the subcarrier of filling bit.In embodiments of the present invention, for ease of describing and distinguishing, the subcarrier being used for carrying filling bit in OFDM symbol is called target sub-carriers.
If each target sub-carriers needs the number of the filling bit of carrying to be that the constellation modulation system that M, M are adopted by OFDM symbol determines, according to QPSK modulation system, then M=log2 (4)=2; According to 16QAM modulation system, then M=log2 (16)=4.
Based on above-mentioned, the number of the filling bit each OFDM symbol being needed the number of the filling bit comprised and each target sub-carriers needs to carry is divided by, and obtains business a and remainder b, i.e. N/M=a, N%M=b.If a ≠ 0, then can determine that each OFDM symbol needing insert a target sub-carriers is used for carrying filling bit; If b ≠ 0, then can determine each OFDM symbol needs b bit that a target sub-carriers carries for carrying filling bit.
Above-mentioned steps 101 and step 102 are illustrated:
Such as, 42 bits are add up to when filling bit corresponding to data to be sent, data to be sent modulate altogether 8 OFDM symbol, and when adopting 16QAM modulation system, then can calculate each OFDM symbol to need to comprise 5 filling bits (floor (42/8)), also remain 2 filling bits simultaneously and do not distribute to any one OFDM symbol, so can be put into inside last OFDM symbol for these 2 filling bits, also can these 2 filling bits be placed in first OFDM symbol, also can by these 2 filling bits according to OFDM symbol order successively share in first OFDM symbol and second OFDM symbol, etc..
Owing to adopting 16QAM modulation system, a subcarrier can carry 4 bits, and so each OFDM symbol has (floor (5/4))=1 subcarrier and is used for carrying filling bit, also has unnecessary (5%4)=1 bit simultaneously.Wherein, 1 unnecessary bit can be put in first bit on the I road of another one subcarrier in OFDM symbol or first bit on Q road, in like manner also can be put in second bit on I road or second bit on Q road.When by above-mentioned remaining 2 filling bits according to OFDM symbol order sharing in first OFDM symbol and second OFDM symbol successively time, so for these 8 OFDM symbol, the first two OFDM symbol can carry filling bit with 2 subcarriers; And all the other 6 OFDM symbol first can carry filling bit with a subcarrier, and carry remaining filling bit by with the I road of another subcarrier or Q road.
Again such as, 34 bits are add up to when filling bit corresponding to data to be sent, data to be sent modulate altogether 9 OFDM symbol, and adopt QPSK to modulate, then can calculate each OFDM symbol to need to comprise 3 filling bits (floor (34/9)), also remain 7 filling bits simultaneously and do not distribute to any one OFDM symbol, so can be put in last OFDM symbol for these 7 filling bits, also can these 7 filling bits be placed in first OFDM symbol, or also can by these 7 filling bits according to OFDM symbol order successively share first OFDM symbol, second OFDM symbol, 3rd OFDM symbol, the rest may be inferred in the 7th OFDM symbol, etc..
Owing to adopting QPSK modulation system, a subcarrier can carry 2 bits, so each OFDM symbol has (floor (3/2))=1 subcarrier and is used for carrying filling bit, also has unnecessary (3%2)=1 bit simultaneously, can be placed in the I road of another one subcarrier.When above-mentioned remaining 7 filling bits are put in last OFDM symbol, for these 9 OFDM symbol, wherein front 8 OFDM symbol can with 1 sub-carriers carry filling bit, and with the remaining filling bit of I road carrying of another one subcarrier; 9th OFDM symbol is needed with 5 sub-carriers carry, 10 filling bits.
103, the number of the filling bit of carrying is needed according to the number of target sub-carriers in each OFDM symbol and each target sub-carriers, according to the constellation modulation system preset, the filling bit comprised is needed to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol.
After the number and each target sub-carriers of determining the target sub-carriers in each OFDM symbol need the number of the filling bit of carrying, can the filling bit comprised be needed to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol accordingly.
Illustrate at this, other bits except filling bit in OFDM symbol, before constellation modulation is carried out to filling bit, just can be modulated onto on corresponding subcarrier, also can be modulated onto together on corresponding subcarrier to filling bit.
104, the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol is determined, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers except described target sub-carriers, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains each OFDM symbol.
105, each OFDM symbol is sent.
After filling bit being modulated on corresponding subcarrier, first determine the bit sequence of the filling bit in each OFDM symbol on transmission objectives subcarrier, determine the bit sequence that other subcarriers in each OFDM symbol except target sub-carriers are corresponding simultaneously.This illustrate, concerning each OFDM symbol, possible all subcarriers that it comprises all as target sub-carriers to carry filling bit, also may only have portion subcarriers as target sub-carriers to carry filling bit; Can useful information be carried for the subcarrier not carrying filling bit, also can not carry any information.Then, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers; Then, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains OFDM symbol.Other subcarriers described here refer in OFDM symbol not to be needed to carry filling bit, may carry the subcarrier of data bit.
According to the difference of the constellation modulation system adopted, bit sequence condition for transmitting the filling bit in the target sub-carriers in each OFDM symbol has multiple, need in embodiments of the present invention therefrom to select a bit sequence that the PAPR of OFDM symbol can be made to reduce for transmitting described filling bit, so that lower PAPR further.Namely, in an Alternate embodiments, based on the principle reducing PAPR, the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol can be determined.Illustrate at this, in the embodiment of the present invention, the principle of described reduction PAPR refers to compared with existing standard, can reduce the principle of PAPR.Such as, the principle of described reduction PAPR can refer to the PAPR of described target sub-carriers when carrying filling bit, lower than the principle of PAPR when described target sub-carriers carrying random data, or the PAPR of described target sub-carriers when carrying filling bit can be referred to, the principle of PAPR when not carrying any filling bit and random data lower than described target sub-carriers.Illustrating, when comprising 8 filling bits in an OFDM symbol, supposing to adopt QPSK modulation system, then have 4 target sub-carriers to be used for carrying filling bit, the filling bit simultaneously in each target sub-carriers has the combined situation of 4 kinds of bit sequences altogether, is 00,01,10,00.Filling bit so in 4 target sub-carriers just has the combined situation of 16 kinds of bit sequences, therefore, need to select inside these 16 kinds of combined situation the PAPR of OFDM symbol is reduced a road for transfer of data.When comprising 4 filling bits in an OFDM symbol, suppose to adopt QPSK modulation, then need 2 target sub-carriers to be used for carrying filling bit, filling bit simultaneously in each target sub-carriers has the combined situation of 4 kinds of bit sequences altogether, is 00,01,10,00.Filling bit so in 2 target sub-carriers just has the combined situation of 4 kinds of bit sequences, therefore, need to select inside these 4 kinds of combined situation the PAPR of OFDM symbol is reduced a road for the filling bit transmission OFDM symbol.
Optionally, a kind of principle based on reducing PAPR, the mode determining the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol comprises: when filling bit is modulated onto in corresponding target sub-carriers, planisphere is rotated, thus carrying out traversal search, the bit sequence therefrom selecting PAPR minimum transmits.Such as by 8 filling bits after QPSK modulation, have 4 target sub-carriers and be used for carrying filling bit, the planisphere that maps after modulation is carried out 45 degree of rotations, then carries out traversal search.
Further alternative, when traversal search, also operand can be reduced by setting a thresholding to PAPR.Such as, when the PAPR value calculated is less than the threshold value of setting, then stop calculating PAPR, it is minimum PAPR that the PAPR now calculated is used as, and then uses the bit sequence calculating this minimum PAPR to carry out transfer of data.Such as, the threshold value of selected PAPR is 3, when the mode by traversal calculate current PAPR value be less than 3 time, then stop calculating PAPR, and the bit sequence that use calculates current PAPR carries out transfer of data.
In the middle of PPDU cataloged procedure in Wi-Fi, original filling bit is placed on after tail bit, and need to participate in scrambler, forward error correction (Forward Error Correction, referred to as FEC) chnnel coding and time domain and interweave, a kind of schematic diagram as shown in Figure 2.And in the present embodiment, filling bit does not participate in these processes, but at the direct bit interleaving in complete sequence that interweaves, a kind of schematic diagram as shown in Figure 3, the part that Fig. 3 bend is filled represents it is no longer filling bit, and the part that Fig. 3 mid point is filled represents the position of filling bit.
From above-mentioned, the present embodiment is when sending data, the sum of filling bit corresponding according to data to be sent and total number of the OFDM symbol that should be modulated into, first determine that each OFDM symbol needs the filling bit number comprised, the filling bit number comprised is needed again according to the constellation modulation system adopted and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the target sub-carriers number and each target sub-carriers carrying filling bit, accordingly, according to described constellation modulation system, the filling bit comprised is needed to be modulated in the target sub-carriers in OFDM each OFDM symbol, after again constellation modulation being carried out to the target sub-carriers in each OFDM symbol and bit sequence corresponding to other subcarriers, carry out OFDM modulation again, obtain OFDM symbol, send OFDM symbol afterwards.In the present embodiment, by filling bit is inserted in OFDM symbol with the form of idle sub-carrier, the redundant data made full use of in OFDM symbol produces the data that can offset with peak value, reaching by reducing peak value the object reducing PAPR, solving the various defects caused because PAPR is higher.
The present embodiment provides a kind of Alternate embodiments of step 103, comprising: the number determining target sub-carriers in rule and each OFDM symbol according to the position of presetting, and determines the position of filling bit in each OFDM symbol; Need the number of the filling bit of carrying according to each target sub-carriers, according to the constellation modulation system preset, the filling bit of respective number is modulated in the target sub-carriers of correspondence position.
Illustrate at this, in various embodiments of the present invention, the constellation modulation system that modulation filling bit adopts can be identical with the constellation modulation system that modulating data bit adopts, also can not be identical.
In this embodiment, make an appointment at data transmitting equipment and data receiver end in the position of target sub-carriers in OFDM symbol for carrying filling bit, namely position determines that rule is that transmitting-receiving two-end is made an appointment.Optionally, the position of presetting determines that rule can comprise: according to the numeric order of each OFDM symbol sub-carriers, determine the position of filling bit successively; Or, be the sequencing of the subcarrier of odd number according to sequence number in each OFDM symbol, determine the position of filling bit successively; Or, be the sequencing of the subcarrier of even number according to sequence number in each OFDM symbol, determine the position of filling bit successively.Such as, an OFDM symbol has 48 subcarriers for the transmission of data, the target sub-carriers for carrying filling bit directly according to the numeric order successively (1,2,3,4 of subcarrier ... 48) be inserted in these 48 subcarriers; Or, can be also odd number (1,3,5,7 according to sequence number in these 48 subcarriers ... 47) or sequence number is even number (2,4,6,8 ... 48) sequencing of subcarrier, inserts in these 24 subcarriers successively.Wherein, the position of the filling bit of each OFDM symbol is the same.
In addition, the filling bit position appointed also can be change according to certain rule, as in first OFDM symbol, the original position of filling bit is k1, in second OFDM symbol, the original position of filling bit is k2, the rest may be inferred, and in the n-th OFDM symbol, the original position of filling bit is kn.Wherein k1, k2 ... kn forms a sequence.When Data Modulation to be sent becomes 8 OFDM symbol, and when the target sub-carriers number in each OFDM symbol is 4, the target sub-carriers sequence number in first OFDM symbol is 1,2,3,4.Target sub-carriers sequence number then in second OFDM symbol is 2,3,4,5, the like, the target sub-carriers sequence number in the 8th OFDM symbol is 8,9,10,11.Or the target sub-carriers sequence number in first OFDM symbol is 1,2,3,4, then the target sub-carriers sequence number in second OFDM symbol is 5,6,7,8, the like, the target sub-carriers sequence number in the 8th OFDM symbol is 29,30,31,32.
The present embodiment provides the another kind of Alternate embodiments of step 103, comprising: in OFDM symbol for carry the position of the target sub-carriers of filling bit be change, namely data transmitting equipment and data receiver are not made an appointment.
Based on this, in order to the position enabling data receiver determine target sub-carriers in OFDM symbol, data transmitting equipment is before each OFDM symbol of transmission, primary importance mark can be carried respectively, the position of primary importance mark for identifying target sub-carriers in each OFDM symbol in each OFDM symbol in the idle bit of each OFDM symbol.In this embodiment, because each OFDM symbol carries primary importance mark, so each OFDM symbol can adopt identical position, different positions also can be adopted to carry target sub-carriers.
Or data transmitting equipment, before each OFDM symbol of transmission, can carry second place mark in the idle bit in first OFDM symbol, the described position of second place mark for identifying target sub-carriers in each OFDM symbol.In this embodiment, each OFDM symbol needs to select identical sequence number.
Optionally, data transmitting equipment and data receiver can be made an appointment an arrangement set; The filling bit position that each sequence number correspondence in arrangement set is fixing.Illustrate, each OFDM symbol needs 5 target sub-carriers to be used for carrying filling bit, then the arrangement set that can make an appointment of data transmitting equipment and data receiver two ends is as follows:
Sequence 1 is: 1,9,2,37,42;
Sequence 2 is: 3,7,12,34,23;
Sequence 3 is: 4,8,10,22,35;
Sequence 4 is: 2,7,15,21,32;
Sequence 5 is: 1,6,33,35,41;
Sequence 6 is: 3,9,16,27,39;
Sequence 7 is: 5,15,25,31,45;
Sequence 8 is: 7,13,26,30,43.
Based on above-mentioned, data transmitting equipment can select the filling bit position that a sequence number is corresponding from above-mentioned arrangement set, on the position that selected by being inserted into by filling bit in OFDM symbol, sequence number is corresponding, and before transmission OFDM symbol, selected sequence number information is carried in the idle bit of OFDM symbol and is supplied to data receiver, so that data receiver learns the position of the target sub-carriers in the OFDM symbol that data transmitting equipment sends based on this sequence number information.
Such as, when transmitting terminal adopts sequence number 8, then sequence number is 7,13 in each ofdm symbol, and the sub-carrier positions of 26,30,43 is the target sub-carriers for carrying filling bit.When sending, selected sequence number 8 is carried in OFDM symbol and is sent to data receiver by data transmitting equipment, and so data receiver just can learn the position of the target sub-carriers in the OFDM symbol that data transmitting equipment sends according to sequence number 8.
Again such as, when there being 8 OFDM symbol, when each OFDM symbol needs 5 subcarriers to be used for carrying filling bit, so first OFDM symbol can choose sequence 4, is so 2,7 in sequence number, the sub-carrier positions of 15,21,32 is the target sub-carriers for carrying filling bit; Second OFDM symbol can choose sequence number 1, and be so 1,9 in sequence number, the subcarrier of 2,37,42 is the target sub-carriers for carrying filling bit; In like manner, the 8th OFDM symbol can choose sequence number 7, and be so 5,15 in sequence number, the sub-carrier positions of 25,31,45 is the target sub-carriers for carrying filling bit.For each OFDM symbol, the information of selected sequence number is stored in idle bit by data transmitting equipment, then be sent to data receiver, so data receiver just can learn the position of the target sub-carriers in the OFDM symbol that data transmitting equipment sends according to corresponding sequence number.
Further illustrate, when being less than the number of filling bit position corresponding to each sequence number for the number V of the target sub-carriers carrying filling bit in each OFDM symbol, before so choosing in the position that each sequence number is corresponding, inserting of target sub-carriers is carried out in V position.Such as, when each OFDM symbol need 4 target sub-carriers be used for carrying filling bit time, same adopt above-mentioned arrangement set, four positions before so only need getting in the position corresponding at selected sequence number.When OFDM symbol reads sequence number 3, then need being only 4,8 in sequence number, the sub-carrier positions of 10,22 being inserted the target sub-carriers for carrying filling bit.
Wherein, Physical layer convergence protocol (Physical Layer Convergence Procedure, referred to as PLCP) length field be made up of the signless integer of 12 bits, give medium access control (Media Access Control, referred to as MAC) layer request physics (Physic, referred to as PHY) the eight hyte group numbers of PSDU that layer sends, its span is 1-4095.After receiving the request starting to send, this value of PHY determines the required eight-bit group number transmitted between MAC layer and PHY layer.Because the embodiment of the present invention mainly considers the scene that packet is smaller, the probability that general data are surrounded by 80% is 100 bytes (2^7=128).That is in length field, have the length that 7 table of bits show packet, the bit due to length field is 12, so can remain 5 idle bits in length field.So above-mentioned idle bit can be in the length field of signal domain not by the bit used, namely utilize these 5 idle bits in length field to represent the positional information of target sub-carriers of carrying filling bit.
Optionally, except adopting the mode of above-mentioned sequence number, the positional information of target sub-carriers can also directly be carried in the idle bit of OFDM symbol by data sending terminal.Such as, the situation of 5 idle bits can be remained for above-mentioned length field, just have 32 kinds of situations, then can represent the positional information of 32 kinds of target sub-carriers.
Further, suppose that the order for the target sub-carriers carrying filling bit is present in successively from small to large in OFDM symbol according to sequence number, so primary importance mark or second place mark can be no longer concrete positions, can be the numbers of the target sub-carriers that in each OFDM symbol, order exists.The number of the target sub-carriers that data receiver is existed by order, can determine the positional information of each target sub-carriers.
Such as, can remain the situation of 5 idle bits for above-mentioned length field, primary importance mark or second place mark can be 00000,00001 ..., the one in 11110 and 11111.Wherein, 00000 indicates 1 target sub-carriers, and 00001 indicates 2 target sub-carriers ..., 11110 indicate 31 target sub-carriers, and 11111 indicate 32 target sub-carriers.Based on this, when reading number is N to data receiver from idle bit, indicates N+1 target sub-carriers carrying filling bit, and then the position of each target sub-carriers can be determined.Such as, when data receiver reads 11110 from idle bit, indicate 31 target sub-carriers carrying filling bits; When reading 01011 from idle bit, indicate 12 target sub-carriers carrying filling bits.
Adopt the method for the filling bit of the embodiment of the present invention that transmitting terminal can be made more flexible, utilize filling bit to be inserted in OFDM symbol as subcarrier, the PAPR in OFDM can be effectively reduced, thus improve power amplification efficiency.
The flow chart of a kind of data receive method that Fig. 4 provides for the embodiment of the present invention.As shown in Figure 4, described method comprises:
401, receive at least one OFDM symbol, and OFDM demodulation is carried out to each described OFDM symbol, obtain the OFDM symbol after at least one demodulation.
The application scenarios of the present embodiment can be system or the network of any use OFDM technology, such as, can be but be not limited to: Wi-Fi network and WiMax network.
The data transmission method for uplink that the present embodiment and above-described embodiment provide is corresponding, is the description carried out from the angle of receiving terminal.Data receiver receives the OFDM symbol that data transmitting equipment sends.OFDM symbol in the present embodiment includes filling bit.The OFDM symbol that comprises filling bit is generated and the process sending OFDM symbol see the description of aforementioned data sending method embodiment, can not repeat them here about data transmitting equipment.
402, the position in the OFDM symbol of the target sub-carriers that the OFDM symbol after determining each described demodulation comprises after each described demodulation, described target sub-carriers carries filling bit.
After data receiver obtains the OFDM symbol after each demodulation, the number of the filling bit that the whole data segment corresponding with the OFDM symbol after this demodulation should comprise can be determined.Such as, data receiver can calculate the sum of the filling bit that whole data segment corresponding to the OFDM symbol after demodulation should comprise according to the length field of the OFDM symbol after demodulation.But do not know that whole data segment comprises altogether how many OFDM symbol due to data receiver, therefore the number of the filling bit that each OFDM symbol comprises cannot be determined.
In addition, the position of the target sub-carriers that the OFDM symbol after data receiver can determine each demodulation comprises.Wherein, the mode of the position of the target sub-carriers that the OFDM symbol after data receiver determines each demodulation comprises can have various ways, specifically in process of transmitting, determines that the mode of target sub-carriers position is corresponding with transmitting terminal.
Such as, in an Alternate embodiments, data transmitting equipment determines rule according to the position of presetting, and inserts target sub-carriers in each ofdm symbol.Therefore data receiver can determine rule according to the position of presetting, and determines the position in the OFDM symbol of target sub-carriers after each described demodulation in the OFDM symbol after each demodulation.
Further alternative, the position of presetting determines that rule can be the numeric order according to OFDM symbol sub-carriers, determines the position of filling bit successively, then the position of filling bit corresponds to the position of the target sub-carriers that described filling bit is modulated onto.Or the position of presetting determines that rule can be the sequencing of the subcarrier being odd number according to sequence number in OFDM symbol, determines the position of filling bit successively, then the position of filling bit corresponds to the position of the target sub-carriers that described filling bit is modulated onto.Or the position of presetting determines that rule can be the sequencing of the subcarrier being even number according to sequence number in OFDM symbol, determines the position of filling bit successively, then the position of filling bit corresponds to the position of the target sub-carriers that described filling bit is modulated onto.
Such as, in another Alternate embodiments, data transmitting equipment adds primary importance mark in each ofdm symbol, identifies the position of target sub-carriers in the OFDM symbol at place in order to identify this primary importance.Primary importance mark in OFDM symbol after each demodulation, for identifying the position of target sub-carriers in the OFDM symbol after this demodulation.Based on this, data receiver specifically can obtain primary importance mark from the OFDM symbol after each demodulation, according to primary importance mark, determine the position in target sub-carriers that the OFDM symbol after each demodulation the comprises OFDM symbol after each described demodulation.
Further alternative, primary importance is designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence in arrangement set is fixing.Or primary importance is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.Detailed description about these two kinds of execution modes see the description of aforementioned data sending method embodiment, can not repeat them here.
Such as, in another Alternate embodiments, data transmitting equipment identifies, in order to identify the position of the target sub-carriers that each OFDM symbol comprises by inserting the second place in the OFDM symbol of first transmission.In this embodiment, the position of target sub-carriers that comprises of each OFDM symbol is all identical.Based on this, data receiver specifically can by obtaining second place mark, based on second place mark, determines the position in target sub-carriers that the OFDM symbol after each demodulation the comprises OFDM symbol after each described demodulation.
Wherein, if the OFDM symbol after current demodulation is not first OFDM symbol received, then data receiver needs from first OFDM symbol received, obtain described second place mark; If the OFDM symbol after current described demodulation is the first OFDM symbol received, then data receiver directly can obtain described second place mark from the OFDM symbol after current described demodulation.
Further alternative, the second place is designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing.Or the described second place is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.Detailed description about these two kinds of execution modes see the description of aforementioned data sending method embodiment, can not repeat them here.
403, the position in the OFDM symbol of the target sub-carriers comprised according to the OFDM symbol after each described demodulation after each described demodulation, determines the number of the target sub-carriers that the OFDM symbol after each described demodulation comprises.
Behind position in the OFDM symbol of the target sub-carriers that OFDM symbol after determining each demodulation comprises after each described demodulation, the number of the target sub-carriers that the OFDM symbol after each demodulation comprises can be determined.A corresponding target sub-carriers in position.
The constellation modulation system that OFDM symbol after the number of the target sub-carriers 404, comprised according to the OFDM symbol after all described demodulation and described demodulation adopts, determines the number of the filling bit that each target sub-carriers carries.
After the number of the target sub-carriers that the OFDM symbol after determining each demodulation comprises, the constellation modulation system that OFDM symbol after the number of the target sub-carriers that can comprise according to the OFDM symbol after all described demodulation and described demodulation adopts, determines the number of the filling bit that each target sub-carriers carries.Wherein, the constellation modulation system that the OFDM symbol after demodulation adopts can be obtained by the speed field in the SIG territory of the OFDM symbol after demodulation.Wherein, the constellation modulation system that OFDM symbol after the number of the target sub-carriers comprised according to the FDM symbol after described demodulation and described demodulation adopts, determine the process of the number of the filling bit that each target sub-carriers carries, it is the number needing the filling bit of carrying according to adopted constellation modulation system and each target sub-carriers, determine the inverse process of the number process of the target sub-carriers that described OFDM symbol comprises, specifically can refer to aforementioned data sending method embodiment to realize, be not described in detail in this.
405, according to the number of filling bit of the position in the OFDM symbol of each target sub-carriers after the described demodulation of each target sub-carriers of carrying and the carrying of each target sub-carriers, the filling bit all target sub-carriers carried is deleted from the OFDM symbol after all described demodulation, to obtain the data bit from transmitting terminal that at least one OFDM symbol described is carried.
After the position obtained in each target sub-carriers OFDM symbol after demodulation and the filling bit number carried, the filling bit that just all target sub-carriers can be carried is deleted from the OFDM symbol after all described demodulation, thus obtains the data bit from transmitting terminal that the OFDM symbol after demodulation described in each carries.
The data transmission method for uplink that the data receive method that the present embodiment provides and above-described embodiment provide is corresponding, due to by filling bit is inserted in OFDM symbol with the form of idle sub-carrier, the redundant data made full use of in OFDM symbol on insertion position produces the data that can offset with peak value, reaching by reducing peak value the object reducing PAPR, solving the various defects caused because PAPR is higher.
The structural representation of a kind of data transmitting equipment that Fig. 5 provides for the embodiment of the present invention.As shown in Figure 5, described equipment comprises: the first determination module 51, second determination module 52, first modulation module 53, second modulation module 54 and sending module 55.
First determination module 51, for total number of OFDM symbol that should be modulated into according to sum and the described data to be sent of filling bit corresponding to data to be sent, determines that each OFDM symbol needs the number of the filling bit comprised.
Second determination module 52, be connected with the first determination module 51, for needing the number of the filling bit comprised according to the constellation modulation system preset and the determined each OFDM symbol of the first determination module 51, determine the number needing the filling bit of carrying in each OFDM symbol for the number and each target sub-carriers carrying the target sub-carriers of filling bit.
First modulation module 53, be connected with the second determination module 52, for the number according to the number of target sub-carriers in the determined each OFDM symbol of the second determination module 52 and the filling bit of each target sub-carriers needs carrying, according to described default constellation modulation system, the filling bit comprised is needed to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol.
Second modulation module 54, be connected with the first modulation module 53, for determining the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers except described target sub-carriers, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains each OFDM symbol.
Sending module 55, is connected with the second modulation module 54, for sending each OFDM symbol.
In an Alternate embodiments, first modulation module 53 specifically can be used for the number determining target sub-carriers in rule and each OFDM symbol according to the position of presetting, determine the position of filling bit in each OFDM symbol, the number of the filling bit of carrying is needed according to each target sub-carriers, according to described default constellation modulation system, the filling bit of respective number is modulated in the target sub-carriers of correspondence position.
Further alternative, the position of presetting determines that rule comprises: according to the numeric order of each OFDM symbol sub-carriers, determine the position of filling bit successively; Or, be the sequencing of the subcarrier of odd number according to sequence number in each OFDM symbol, determine the position of filling bit successively; Or, be the sequencing of the subcarrier of even number according to sequence number in each OFDM symbol, determine the position of filling bit successively.
As shown in Figure 6, described data transmitting equipment also comprises: add module 56.
Add module 56, be connected with sending module 55, before sending each OFDM symbol at sending module 55, primary importance mark is carried respectively in the idle bit of each OFDM symbol, the position of primary importance mark for identifying target sub-carriers in each OFDM symbol in each OFDM symbol, or carry second place mark in the idle bit in first OFDM symbol, the described position of second place mark for identifying target sub-carriers in each OFDM symbol.
Optionally, described idle bit can be not by the bit used in the length field of signal domain.
Optionally, described primary importance mark or the described second place are designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing.Or described primary importance mark or the described second place are designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
Optionally, second modulation module 54 specifically can be used for the principle based on reducing PAPR, determine the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers except described target sub-carriers, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains each OFDM symbol.
Wherein, the principle of described PAPR can comprise: the PAPR of described target sub-carriers when carrying filling bit, lower than PAPR when described target sub-carriers carrying random data; Or, the PAPR of described target sub-carriers when carrying filling bit, PAPR when not carrying any filling bit and random data lower than described target sub-carriers.
The data transmitting equipment that the present embodiment provides can be any equipment needing to send OFDM symbol such as UE or base station.
Each functional module of the data transmitting equipment that the present embodiment provides can be used for the flow process performing data transmission method for uplink embodiment shown in Fig. 1, and its specific works principle repeats no more, and refers to the description of embodiment of the method.
The data transmitting equipment that the present embodiment provides, when sending data, according to total number of the OFDM symbol that sum and the data to be sent of filling bit corresponding to data to be sent should be modulated into, first determine that each OFDM symbol needs the filling bit number comprised, the filling bit number comprised is needed again according to the constellation modulation system preset and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the target sub-carriers number and each target sub-carriers carrying filling bit, accordingly, according to adopted constellation modulation system, the filling bit comprised is needed to be modulated in the target sub-carriers in OFDM symbol each OFDM symbol, again constellation modulation is carried out to the target sub-carriers in each OFDM symbol and bit sequence corresponding to other subcarriers, carry out OFDM modulation again, obtain OFDM symbol, send described OFDM symbol afterwards.The data transmitting equipment of the present embodiment, by filling bit is inserted in OFDM symbol with the form of idle sub-carrier, the redundant data made full use of in OFDM symbol produces the data that can offset with peak value, reaching by reducing peak value the object reducing PAPR, solving the various defects caused because PAPR is higher.
The structural representation of another data transmitting equipment that Fig. 7 provides for the embodiment of the present invention.As shown in Figure 7, described equipment comprises: memory 71, processor 72, modulator 73 and reflector 74.
Memory 71, for storage program.Particularly, program can comprise program code, and described program code comprises computer-managed instruction.
Memory 71 can comprise high-speed RAM memory, also can comprise nonvolatile memory (non-volatile memory), such as at least one magnetic disc store.
Processor 72, for the program that execute store 71 stores, for: according to total number of the OFDM symbol that sum and the described data to be sent of filling bit corresponding to data to be sent should be modulated into, determine that each OFDM symbol needs the number of the filling bit comprised; Need the number of the filling bit comprised according to the constellation modulation system preset and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the number and each target sub-carriers carrying the target sub-carriers of filling bit.
Processor 72 can be a central processing unit (Central Processing Unit, referred to as CPU), or specific integrated circuit (Application Specific Integrated Circuit, referred to as ASIC), or be configured to the one or more integrated circuits implementing the embodiment of the present invention.
Modulator 73, for the number according to the number of target sub-carriers in each OFDM symbol and the filling bit of each target sub-carriers needs carrying, according to described default constellation modulation system, the filling bit comprised is needed to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol; Determine the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers except described target sub-carriers, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains each OFDM symbol.
Reflector 74, for sending each OFDM symbol.
In an Alternate embodiments, modulator 73 is for the number according to the number of target sub-carriers in each OFDM symbol and the filling bit of each target sub-carriers needs carrying, according to the constellation modulation system preset, need the filling bit comprised to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol, comprising:
Modulator 73 specifically can be used for the number determining target sub-carriers in rule and each OFDM symbol according to the position of presetting, determine the position of filling bit in each OFDM symbol, the number of the filling bit of carrying is needed according to each target sub-carriers, according to the constellation modulation system preset, the filling bit of respective number is modulated in the target sub-carriers of correspondence position.
Wherein, put and determine that rule comprises: according to the numeric order of each OFDM symbol sub-carriers, determine the position of filling bit successively; Or, be the sequencing of the subcarrier of odd number according to sequence number in each OFDM symbol, determine the position of filling bit successively; Or, be the sequencing of the subcarrier of even number according to sequence number in each OFDM symbol, determine the position of filling bit successively.
In an Alternate embodiments, processor 72 is also for before sending each OFDM symbol at reflector 74, primary importance mark is carried respectively in the idle bit of each OFDM symbol, the position of primary importance mark for identifying target sub-carriers in each OFDM symbol in each OFDM symbol, or carry second place mark in the idle bit in first OFDM symbol, the described position of second place mark for identifying target sub-carriers in each OFDM symbol.
Optionally, described idle bit can be not by the bit used in the length field of signal domain.
Optionally, described primary importance mark or the described second place are designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing.Or described primary importance mark or the described second place are designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
In an Alternate embodiments, processor 72 specifically can be used for, based on the principle reducing PAPR, determining the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol.Optionally, the principle of described PAPR can comprise: the PAPR of described target sub-carriers when carrying filling bit, lower than PAPR when described target sub-carriers carrying random data; Or, the PAPR of described target sub-carriers when carrying filling bit, PAPR when not carrying any filling bit and random data lower than described target sub-carriers.
Further, as shown in Figure 7, described equipment also comprises: receiver 75.Receiver 75 and reflector 74 match, and have been responsible for the communication between described data transmitting equipment and other equipment.
Optionally, in specific implementation, realize if memory 71, processor 72, modulator 73, reflector 74 and receiver 75 are independent, then memory 71, processor 72, modulator 73, reflector 74 and receiver 75 can be interconnected by bus and complete mutual communicating.Described bus can be industry standard architecture (Industry Standard Architecture, referred to as ISA) bus, peripheral component interconnect (Peripheral Component, referred to as PCI) bus or extended industry-standard architecture (Extended Industry Standard Architecture, referred to as EISA) bus etc.Described bus can be divided into address bus, data/address bus, control bus etc.For ease of representing, only representing with a thick line in Fig. 7, but not representing the bus only having a bus or a type.
Optionally, in specific implementation, if memory 71, processor 72, modulator 73, reflector 74 and receiver 75 is integrated realizes on one chip, then memory 71, processor 72, modulator 73, reflector 74 and receiver 75 can complete identical communicating by internal interface.
The data transmitting equipment that the present embodiment provides can be any equipment needing to send OFDM symbol such as UE or base station.
The data transmitting equipment that the present embodiment provides can be used for the flow process performing data transmission method for uplink embodiment shown in Fig. 1, and its specific works principle repeats no more, and refers to the description of embodiment of the method.
The data transmitting equipment that the present embodiment provides, when sending data, according to total number of the OFDM symbol that sum and the data to be sent of filling bit corresponding to data to be sent should be modulated into, first determine that each OFDM symbol needs the filling bit number comprised, the filling bit number comprised is needed again according to the constellation modulation system adopted and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the target sub-carriers number and each target sub-carriers carrying filling bit, accordingly, according to adopted constellation modulation system, the filling bit comprised is needed to be modulated in the target sub-carriers in OFDM symbol each OFDM symbol, again constellation modulation is carried out to the target sub-carriers in each OFDM symbol and bit sequence corresponding to other subcarriers, carry out OFDM modulation again, obtain OFDM symbol, send described OFDM symbol afterwards.The data transmitting equipment of the present embodiment, by filling bit is inserted in OFDM symbol with the form of idle sub-carrier, the redundant data made full use of in OFDM symbol produces the data that can offset with peak value, reaching by reducing peak value the object reducing PAPR, solving the various defects caused because PAPR is higher.
The structural representation of a kind of data receiver that Fig. 8 provides for the embodiment of the present invention.As shown in Figure 8, described equipment comprises: receiver module 81, demodulation module 82, first determination module 83, second determination module 84, the 3rd determination module 85 and acquisition module 86.
Receiver module 81, for receiving at least one OFDM symbol.
Demodulation module 82, is connected with receiver module 81, carries out OFDM demodulation, obtain the OFDM symbol after at least one demodulation for each described OFDM symbol received receiver module 81.
First determination module 83, is connected with demodulation module 82, and the position in the OFDM symbol of the target sub-carriers comprised for the OFDM symbol after determining each demodulation that demodulation module 82 demodulates after each described demodulation, described target sub-carriers carries filling bit.
Second determination module 84, be connected with the first determination module 83, for the position in OFDM symbol after each described demodulation of the target sub-carriers that comprises according to the OFDM symbol after the determined each described demodulation of the first determination module 83, determine the number of the target sub-carriers that the OFDM symbol after each described demodulation comprises.
3rd determination module 85, be connected with the second determination module 84, for the constellation modulation system that the OFDM symbol after the number of target sub-carriers that comprises according to the OFDM symbol after the determined all described demodulation of the second determination module 84 and described demodulation adopts, determine the number of the filling bit that each target sub-carriers carries.
Acquisition module 86, be connected with the first determination module 83 and the 3rd determination module 85, the number of the filling bit of each target sub-carriers carrying determined for the position in OFDM symbol after the described demodulation of each target sub-carriers of carrying of each target sub-carriers of determining according to the first determination module 83 and the 3rd determination module 85, the filling bit all target sub-carriers carried is deleted from the OFDM symbol after all described demodulation, to obtain the data bit from transmitting terminal that at least one OFDM symbol described is carried.
In an Alternate embodiments, rule is determined in the position that the first determination module 83 specifically can be used for according to presetting, and determines the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
Described position determines that rule comprises: according to the numeric order of OFDM symbol sub-carriers, determines the position of filling bit successively; Or, be the sequencing of the subcarrier of odd number according to sequence number in OFDM symbol, determine the position of filling bit successively; Or, be the sequencing of the subcarrier of even number according to sequence number in OFDM symbol, determine the position of filling bit successively.
In an Alternate embodiments, first determination module 83 specifically can be used for from the OFDM symbol after each described demodulation, obtain primary importance mark, described primary importance mark identifies the position of target sub-carriers in the OFDM symbol after the described demodulation at place for identifying described primary importance, identify according to described primary importance, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
Optionally, described primary importance is designated a sequence number in arrangement set, the position of the filling bit that each sequence number correspondence is fixing.Or described primary importance is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
In an Alternate embodiments, first determination module 83 specifically can be used for obtaining second place mark, the described position of second place mark for identifying target sub-carriers in each OFDM symbol, identify according to the described second place, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
Wherein, first determination module 83 comprises for obtaining second place mark: if the OFDM symbol after the first determination module 83 specifically can be used for current described demodulation is not first OFDM symbol received, from first OFDM symbol received, then obtain described second place mark, if the OFDM symbol after current described demodulation is the first OFDM symbol received, then from the OFDM symbol after current described demodulation, obtain described second place mark.
Optionally, the described second place is designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing.Or the described second place is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
The data receiver that the present embodiment provides can be any equipment that can receive OFDM symbol such as UE or base station.
Each functional module of the data receiver that the present embodiment provides can be used for the flow process performing data receive method embodiment shown in Fig. 4, and its specific works principle repeats no more, and refers to the description of embodiment of the method.
The data receiver that the present embodiment provides, match with the data transmitting equipment that previous embodiment provides, due to by filling bit is inserted in OFDM symbol with the form of idle sub-carrier, the redundant data made full use of in OFDM symbol on insertion position produces the data that can offset with peak value, reaching by reducing peak value the object reducing PAPR, solving the various defects caused because PAPR is higher.
The structural representation of the another kind of data receiver that Fig. 9 provides for the embodiment of the present invention.As shown in Figure 9, described equipment comprises: receiver 91, demodulator 92, memory 93 and processor 94.
Receiver 91, for receiving at least one OFDM symbol.
Demodulator 92, carries out OFDM demodulation for each described OFDM symbol received receiver 91, obtains the OFDM symbol after at least one demodulation.
Memory 93, for storage program.Particularly, program can comprise program code, and described program code comprises computer-managed instruction.
Memory 93 can comprise high-speed RAM memory, also can comprise nonvolatile memory (non-volatile memory), such as at least one magnetic disc store.
Processor 94, for the program that execute store 93 stores, for: determine the position in target sub-carriers that the OFDM symbol after each demodulation that demodulator 92 demodulates the comprises OFDM symbol after each described demodulation, described target sub-carriers carries filling bit; Position in the OFDM symbol of the target sub-carriers comprised according to the OFDM symbol after each described demodulation after each described demodulation, determines the number of the target sub-carriers that the OFDM symbol after each described demodulation comprises; The constellation modulation system that OFDM symbol after the number of the target sub-carriers comprised according to the OFDM symbol after all described demodulation and described demodulation adopts, determines the number of the filling bit that each target sub-carriers carries; And according to the number of filling bit of the position in the OFDM symbol of each target sub-carriers after the described demodulation of each target sub-carriers of carrying and the carrying of each target sub-carriers, the filling bit all target sub-carriers carried is deleted from the OFDM symbol after all described demodulation, to obtain the data bit from transmitting terminal that at least one OFDM symbol described is carried.
Processor 94 can be a CPU, or specific ASIC, or is configured to the one or more integrated circuits implementing the embodiment of the present invention.
In an Alternate embodiments, the position in the OFDM symbol of the target sub-carriers that processor 94 comprises for the OFDM symbol after determining demodulator 92 demodulation after described demodulation comprises:
Rule is determined in the position that processor 94 specifically can be used for according to presetting, and determines the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
Described position determines that rule comprises: according to the numeric order of OFDM symbol sub-carriers, determines the position of filling bit successively; Or, be the sequencing of the subcarrier of odd number according to sequence number in OFDM symbol, determine the position of filling bit successively; Or, be the sequencing of the subcarrier of even number according to sequence number in OFDM symbol, determine the position of filling bit successively.
In an Alternate embodiments, the position in the OFDM symbol of the target sub-carriers that processor 94 comprises for the OFDM symbol after determining the demodulation of each demodulator 92 after each described demodulation comprises:
Processor 94 specifically can be used for from the OFDM symbol after each described demodulation, obtain primary importance mark, described primary importance mark identifies the position of target sub-carriers in the OFDM symbol after the described demodulation at place for identifying described primary importance, identify according to described primary importance, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
Optionally, described primary importance is designated a sequence number in arrangement set, the position of the filling bit that each sequence number correspondence is fixing.Or described primary importance is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
In an Alternate embodiments, the position in the OFDM symbol of the target sub-carriers that processor 94 comprises for each OFDM symbol after determining demodulator 92 demodulation after each described demodulation comprises:
Processor 94 specifically can be used for obtaining second place mark, the described position of second place mark for identifying target sub-carriers in each OFDM symbol, identify according to the described second place, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
Wherein, processor 94 comprises for obtaining second place mark: if the OFDM symbol after processor 94 specifically can be used for current described demodulation is not first OFDM symbol received, from first OFDM symbol received, then obtain described second place mark, if the OFDM symbol after current described demodulation is the first OFDM symbol received, then from the OFDM symbol after current described demodulation, obtain described second place mark.
Optionally, the described second place is designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing.Or the described second place is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
Further, as shown in Figure 9, described equipment also comprises: reflector 95.Receiver 91 and reflector 95 match, and have been responsible for the communication between described data receiver and other equipment.
Optionally, in specific implementation, realize if receiver 91, demodulator 92, memory 93, processor 94 and reflector 95 are independent, then receiver 91, demodulator 92, memory 93, processor 94 and reflector 95 can be interconnected by bus and complete mutual communicating.Described bus can be isa bus, pci bus or eisa bus etc.Described bus can be divided into address bus, data/address bus, control bus etc.For ease of representing, only representing with a thick line in Fig. 9, but not representing the bus only having a bus or a type.
Optionally, in specific implementation, if receiver 91, demodulator 92, memory 93, processor 94 and reflector 95 is integrated realizes on one chip, then receiver 91, demodulator 92, memory 93, processor 94 and reflector 95 can complete identical communicating by internal interface.
The data receiver that the present embodiment provides can be any equipment that can receive OFDM symbol such as UE or base station.
The data receiver that the present embodiment provides can be used for the flow process performing data receive method embodiment shown in Fig. 4, and its specific works principle repeats no more, and refers to the description of embodiment of the method.
The data receiver that the present embodiment provides, match with the data transmitting equipment that previous embodiment provides, due to by filling bit is inserted in OFDM symbol with the form of idle sub-carrier, the redundant data made full use of in OFDM symbol on insertion position produces the data that can offset with peak value, reaching by reducing peak value the object reducing PAPR, solving the various defects caused because PAPR is higher.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that program command is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (30)

1. a data transmission method for uplink, is characterized in that, comprising:
According to total number of the orthogonal frequency division multiplexi OFDM symbol that sum and the described data to be sent of filling bit corresponding to data to be sent should be modulated into, determine that each OFDM symbol needs the number of the filling bit comprised;
Need the number of the filling bit comprised according to the constellation modulation system preset and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the number and each target sub-carriers carrying the target sub-carriers of filling bit;
According to the number of the filling bit that number and each target sub-carriers needs of target sub-carriers in each OFDM symbol carry, according to described default constellation modulation system, the filling bit comprised is needed to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol;
Determine the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers except described target sub-carriers, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains each OFDM symbol;
Send each OFDM symbol.
2. method according to claim 1, it is characterized in that, the described number according to target sub-carriers in each OFDM symbol and each target sub-carriers need the number of the filling bit of carrying, according to described default constellation modulation system, need the filling bit comprised to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol, comprising:
Determine the number of target sub-carriers in rule and each OFDM symbol according to the position of presetting, determine the position of filling bit in each OFDM symbol;
Need the number of the filling bit of carrying according to each target sub-carriers, according to described default constellation modulation system, the filling bit of respective number is modulated in the target sub-carriers of correspondence position.
3. method according to claim 2, is characterized in that, described position determines that rule comprises:
According to the numeric order of each OFDM symbol sub-carriers, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of odd number according to sequence number in each OFDM symbol, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of even number according to sequence number in each OFDM symbol, determine the position of filling bit successively.
4. method according to claim 1, is characterized in that, before each OFDM symbol of transmission, comprising:
Primary importance mark is carried respectively, the position of primary importance mark for identifying target sub-carriers in each OFDM symbol in each OFDM symbol in the idle bit of each OFDM symbol; Or
Second place mark is carried, the described position of second place mark for identifying target sub-carriers in each OFDM symbol in idle bit in first OFDM symbol.
5. method according to claim 4, is characterized in that, described idle bit is not by the bit used in the length field of signal domain.
6. the method according to claim 4 or 5, is characterized in that, described primary importance mark or the described second place are designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing; Or
Described primary importance mark or the described second place are designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
7. the method according to any one of claim 1-6, is characterized in that, described in determine the filling bit transmitted in the target sub-carriers in each OFDM symbol bit sequence comprise:
Based on the principle reducing papr PAPR, determine the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol;
Wherein, the principle of described reduction PAPR comprises: the PAPR of described target sub-carriers when carrying filling bit, lower than PAPR when described target sub-carriers carrying random data, or the PAPR of described target sub-carriers when carrying filling bit, PAPR when not carrying any filling bit and random data lower than described target sub-carriers.
8. a data receive method, is characterized in that, comprising:
Receive at least one orthogonal frequency division multiplexi OFDM symbol, and OFDM demodulation is carried out to each described OFDM symbol, obtain the OFDM symbol after at least one demodulation;
Determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation, described target sub-carriers carries filling bit;
Position in the OFDM symbol of the target sub-carriers comprised according to the OFDM symbol after each described demodulation after each described demodulation, determines the number of the target sub-carriers that the OFDM symbol after each described demodulation comprises;
The constellation modulation system that OFDM symbol after the number of the target sub-carriers comprised according to the OFDM symbol after all described demodulation and described demodulation adopts, determines the number of the filling bit that each target sub-carriers carries;
According to the number of filling bit of the position in the OFDM symbol of each target sub-carriers after the described demodulation of each target sub-carriers of carrying and the carrying of each target sub-carriers, the filling bit all target sub-carriers carried is deleted from the OFDM symbol after all described demodulation, to obtain the data bit from transmitting terminal that at least one OFDM symbol described is carried.
9. method according to claim 8, is characterized in that, described determine each described demodulation after the OFDM symbol of the target sub-carriers that comprises of OFDM symbol after each described demodulation in position, comprising:
Determine rule according to the position of presetting, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
10. method according to claim 9, is characterized in that, described position determines that rule comprises:
According to the numeric order of OFDM symbol sub-carriers, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of odd number according to sequence number in OFDM symbol, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of even number according to sequence number in OFDM symbol, determine the position of filling bit successively.
11. methods according to claim 8, is characterized in that, described determine each described demodulation after the OFDM symbol of the target sub-carriers that comprises of OFDM symbol after each described demodulation in position, comprising:
From the OFDM symbol after each described demodulation, obtain primary importance mark, described primary importance mark identifies the position of target sub-carriers in the OFDM symbol after the described demodulation at place for identifying described primary importance;
Identify according to described primary importance, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
12. methods according to claim 11, is characterized in that, described primary importance is designated a sequence number in arrangement set, the position of the filling bit that each sequence number correspondence is fixing; Or
Described primary importance is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
13. methods according to claim 8, is characterized in that, described determine each described demodulation after the OFDM symbol of the target sub-carriers that comprises of OFDM symbol after each described demodulation in position, comprising:
The acquisition second place identifies, the described position of second place mark for identifying target sub-carriers in each OFDM symbol;
Identify according to the described second place, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
14. methods according to claim 13, is characterized in that, described acquisition second place mark, comprising:
If the OFDM symbol after current described demodulation is not first OFDM symbol received, then from first OFDM symbol received, obtain described second place mark;
If the OFDM symbol after current described demodulation is the first OFDM symbol received, then from the OFDM symbol after current described demodulation, obtain described second place mark.
15. methods according to claim 13 or 14, it is characterized in that, the described second place is designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing; Or
The described second place is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
16. 1 kinds of data transmitting equipments, is characterized in that, comprising:
First determination module, for total number of orthogonal frequency division multiplexi OFDM symbol that should be modulated into according to sum and the described data to be sent of filling bit corresponding to data to be sent, determines that each OFDM symbol needs the number of the filling bit comprised;
Second determination module, for needing the number of the filling bit comprised according to the constellation modulation system preset and each OFDM symbol, determine the number needing the filling bit of carrying in each OFDM symbol for the number and each target sub-carriers carrying the target sub-carriers of filling bit;
First modulation module, for the number according to the number of target sub-carriers in each OFDM symbol and the filling bit of each target sub-carriers needs carrying, according to described default constellation modulation system, the filling bit comprised is needed to be modulated in the target sub-carriers in each OFDM symbol each OFDM symbol;
Second modulation module, for determining the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers except described target sub-carriers, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains each OFDM symbol;
Sending module, for sending each OFDM symbol.
17. equipment according to claim 16, it is characterized in that, described first modulation module is specifically for determining the number of target sub-carriers in rule and each OFDM symbol according to the position of presetting, determine the position of filling bit in each OFDM symbol, the number of the filling bit of carrying is needed according to each target sub-carriers, according to described default constellation modulation system, the filling bit of respective number is modulated in the target sub-carriers of correspondence position.
18. equipment according to claim 17, is characterized in that, described position determines that rule comprises:
According to the numeric order of each OFDM symbol sub-carriers, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of odd number according to sequence number in each OFDM symbol, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of even number according to sequence number in each OFDM symbol, determine the position of filling bit successively.
19. equipment according to claim 16, is characterized in that, also comprise:
Add module, before sending each OFDM symbol at described sending module, primary importance mark is carried respectively in the idle bit of each OFDM symbol, the position of primary importance mark for identifying target sub-carriers in each OFDM symbol in each OFDM symbol, or carry second place mark in the idle bit in first OFDM symbol, the described position of second place mark for identifying target sub-carriers in each OFDM symbol.
20. equipment according to claim 19, is characterized in that, described idle bit is not by the bit used in the length field of signal domain.
21. equipment according to claim 19 or 20, is characterized in that, described primary importance mark or the described second place are designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing; Or
Described primary importance mark or the described second place are designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
22. equipment according to any one of claim 16-21, is characterized in that,
Described second modulation module is specifically for the principle based on reduction papr PAPR, determine the bit sequence of the filling bit transmitted in the target sub-carriers in each OFDM symbol, constellation modulation is carried out to the bit sequence of the filling bit on transmission objectives subcarrier in each OFDM symbol and bit sequence corresponding to other subcarriers except described target sub-carriers, OFDM modulation is carried out to the symbol obtained through constellation modulation in each OFDM symbol, obtains each OFDM symbol; Wherein, the principle of described reduction PAPR comprises: the PAPR of described target sub-carriers when carrying filling bit, lower than PAPR when described target sub-carriers carrying random data, or the PAPR of described target sub-carriers when carrying filling bit, PAPR when not carrying any filling bit and random data lower than described target sub-carriers.
23. 1 kinds of data receivers, is characterized in that, comprising:
Receiver module, for receiving at least one orthogonal frequency division multiplexi OFDM symbol;
Demodulation module, for carrying out OFDM demodulation to each described OFDM symbol, obtains the OFDM symbol after at least one demodulation;
First determination module, the position in the OFDM symbol of the target sub-carriers comprised for the OFDM symbol after determining each described demodulation after each described demodulation, described target sub-carriers carries filling bit;
Second determination module, for the position in OFDM symbol after each described demodulation of the target sub-carriers that comprises according to the OFDM symbol after each described demodulation, determines the number of the target sub-carriers that the OFDM symbol after each described demodulation comprises;
3rd determination module, for the constellation modulation system that the OFDM symbol after the number of target sub-carriers that comprises according to the OFDM symbol after all described demodulation and described demodulation adopts, determines the number of the filling bit that each target sub-carriers carries;
Acquisition module, for the number of filling bit according to the position in the OFDM symbol of each target sub-carriers after the described demodulation of each target sub-carriers of carrying and the carrying of each target sub-carriers, the filling bit all target sub-carriers carried is deleted from the OFDM symbol after all described demodulation, to obtain the data bit from transmitting terminal that at least one OFDM symbol described is carried.
24. equipment according to claim 23, it is characterized in that, described first determination module, specifically for determining rule according to the position of presetting, determines the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
25. equipment according to claim 24, is characterized in that, described position determines that rule comprises:
According to the numeric order of OFDM symbol sub-carriers, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of odd number according to sequence number in OFDM symbol, determine the position of filling bit successively; Or
Be the sequencing of the subcarrier of even number according to sequence number in OFDM symbol, determine the position of filling bit successively.
26. equipment according to claim 23, it is characterized in that, described first determination module specifically for obtaining primary importance mark from the OFDM symbol after each described demodulation, described primary importance mark identifies the position of target sub-carriers in the OFDM symbol after the described demodulation at place for identifying described primary importance, identify according to described primary importance, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
27. equipment according to claim 26, is characterized in that, described primary importance is designated a sequence number in arrangement set, the position of the filling bit that each sequence number correspondence is fixing; Or
Described primary importance is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
28. equipment according to claim 23, it is characterized in that, described first determination module is specifically for obtaining second place mark, the described position of second place mark for identifying target sub-carriers in each OFDM symbol, identify according to the described second place, determine the position in target sub-carriers that the OFDM symbol after each described demodulation the comprises OFDM symbol after each described demodulation.
29. equipment according to claim 28, is characterized in that, described first determination module comprises for obtaining second place mark:
If described first determination module is not first OFDM symbol received specifically for the OFDM symbol after current described demodulation, from first OFDM symbol received, then obtain described second place mark, if the OFDM symbol after current described demodulation is the first OFDM symbol received, then from the OFDM symbol after current described demodulation, obtain described second place mark.
30. equipment according to claim 28 or 29, it is characterized in that, the described second place is designated a sequence number in arrangement set, the filling bit position that each sequence number correspondence is fixing; Or
The described second place is designated the number for identifying the target sub-carriers that order exists in each OFDM symbol.
CN201310239650.7A 2013-06-17 2013-06-17 Data transmission method for uplink, method of reseptance and equipment Active CN104243383B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016127324A1 (en) * 2015-02-10 2016-08-18 华为技术有限公司 Peak-to-average power ratio reducing method, apparatus, device and system
CN105991225A (en) * 2015-02-13 2016-10-05 富士通株式会社 Information transmission method and device, and communication system
CN111866843A (en) * 2015-05-05 2020-10-30 华为技术有限公司 Method and device for transmitting physical layer protocol data unit
CN112187696A (en) * 2020-10-26 2021-01-05 上海交通大学 Frame signal transmission method and system
US11277225B2 (en) 2017-08-17 2022-03-15 Sony Coroporation Probabilistic signal point shaping device and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101521787A (en) * 2006-07-11 2009-09-02 上海高清数字科技产业有限公司 Multi-modulation transmission system and data frame filling method thereof
CN101951355A (en) * 2010-09-16 2011-01-19 华南理工大学 Method for reducing peak-to-average ratio of lead code of OFDM
CN102158455A (en) * 2010-02-01 2011-08-17 英特尔公司 Coded bit padding
US20120051400A1 (en) * 2010-08-25 2012-03-01 Electronics And Telecommunications Research Institute Method and apparatus for creating frame of ofdm specification using frequency domain spreading

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101521787A (en) * 2006-07-11 2009-09-02 上海高清数字科技产业有限公司 Multi-modulation transmission system and data frame filling method thereof
CN102158455A (en) * 2010-02-01 2011-08-17 英特尔公司 Coded bit padding
US20120051400A1 (en) * 2010-08-25 2012-03-01 Electronics And Telecommunications Research Institute Method and apparatus for creating frame of ofdm specification using frequency domain spreading
CN101951355A (en) * 2010-09-16 2011-01-19 华南理工大学 Method for reducing peak-to-average ratio of lead code of OFDM

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016127324A1 (en) * 2015-02-10 2016-08-18 华为技术有限公司 Peak-to-average power ratio reducing method, apparatus, device and system
CN105991225A (en) * 2015-02-13 2016-10-05 富士通株式会社 Information transmission method and device, and communication system
CN111866843A (en) * 2015-05-05 2020-10-30 华为技术有限公司 Method and device for transmitting physical layer protocol data unit
CN111866843B (en) * 2015-05-05 2021-11-19 华为技术有限公司 Method and device for transmitting physical layer protocol data unit
US11398938B2 (en) 2015-05-05 2022-07-26 Huawei Technologies Co., Ltd. Physical layer protocol data unit transmission method and apparatus
US11784864B2 (en) 2015-05-05 2023-10-10 Huawei Technologies Co., Ltd. Physical layer protocol data unit transmission method and apparatus
US11277225B2 (en) 2017-08-17 2022-03-15 Sony Coroporation Probabilistic signal point shaping device and method
CN112187696A (en) * 2020-10-26 2021-01-05 上海交通大学 Frame signal transmission method and system

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