CN105517663A - Signal transmission and receiving method, device and system - Google Patents

Signal transmission and receiving method, device and system Download PDF

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Publication number
CN105517663A
CN105517663A CN201480009484.4A CN201480009484A CN105517663A CN 105517663 A CN105517663 A CN 105517663A CN 201480009484 A CN201480009484 A CN 201480009484A CN 105517663 A CN105517663 A CN 105517663A
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subcarrier
coefficient
rarefication
degree
sub
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CN105517663B (en
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严平
宁洪
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Abstract

Disclosed are a signal transmission device, comprising: a selection unit selects from n sub-carriers on a transmission channel m sub-carriers for bearing data to be transmitted, m being greater than or equal to 1, and n being greater than m; a modulation unit modulates the data to be transmitted into a modulation signal, and maps the modulation signal to the m sub-carriers selected by the selection unit; and a transmission unit transmits, via the m sub-carriers, the modulation signal modulated by the modulation unit. The signal transmission device provided in an embodiment of the present invention only uses part of the sub-carriers to transmit data, thus increasing sparseness between the sub-carriers, and reducing interference between the sub-carriers.

Description

Signal transmission and receiving method, device and system
Method, apparatus and system technical field that a kind of signal sends, received
The present invention relates to communication technical field, and in particular to a kind of signal is sent, the method for reception, apparatus and system.
Background technology
OFDM (OFDM, Orthogonal Frequency Division Multiplexing) is actually multi-carrier modulation（MCM, Multi-Carrier Modulation) one kind.Its main thought is：Some orthogonal sub-channels are broken a channel into, high-speed data signal is converted into parallel low speed subdata, is modulated on every sub-channels and is transmitted.Orthogonal signalling can be separated in receiving terminal using correlation technique.
OFDM signal modulating mode of the prior art, signal is divided into N number of subsignal, then N number of subsignal is modulated on N number of mutually orthogonal subcarrier respectively and be transmitted, each subcarrier is occupied, when there is frequency deviation or doppler spread, the serious interference between subcarrier.
The content of the invention
The embodiment of the present invention provides the device that a kind of signal is sent, it is not necessary to takes all subcarriers and carries out signal transmission, so that the interference between reducing subcarrier.The embodiment of the present invention additionally provides device, the method and system that corresponding signal is received.
First aspect present invention provides the device that a kind of signal is sent, including：
Selecting unit, for from transmission channelnIn individual subcarrier, the m subcarrier for carrying data to be transmitted is selected, the m is more than or equal to 1, and the n is more than the m;
Modulating unit, for the data to be transmitted to be modulated into modulated signal, and the modulated signal is mapped on the m subcarrier of the selecting unit selection；
Transmitting element, for sending the modulated signal that the modulating unit is modulated by the m subcarrier.
With reference in a first aspect, in the first possible implementation, described device also includes：
First determining unit, for before the m subcarrier that the selecting unit selects for carrying data to be transmitted, according to the determination information of subcarrier degree of rarefication coefficient, the subcarrier degree of rarefication coefficient is determined, the subcarrier degree of rarefication coefficient is m and n ratio；
Second determining unit, for the subcarrier degree of rarefication coefficient determined according to first determining unit With the n, the m is determined.
The first possible implementation with reference to first aspect, in second of possible implementation, first determining unit, for the incidence relation according to preset communication scenes information and the subcarrier degree of rarefication coefficient, determine the subcarrier degree of rarefication coefficient, the communication scenes information includes the distance of transmitting terminal and receiving terminal, the speed that receiving terminal is moved relative to transmitting terminal and the load information of the serving cell serviced is provided for the transmitting terminal or the receiving terminal.
The first possible implementation with reference to first aspect, in the third possible implementation, first determining unit, for the device type according to transmitting terminal, it is determined that compromise balance weight coefficient, the compromise balance weight coefficient is used for the significance level for reflecting Energy Efficiency Ratio；The subcarrier degree of rarefication coefficient is determined according to efficiency function, the efficiency function is the compromise optimization object function of spectrum efficiency and Energy Efficiency Ratio, when the efficiency function reaches maximum, the degree of rarefication coefficient of corresponding subcarrier is the subcarrier degree of rarefication coefficient.
With reference to the first any one into the third possible implementation of first aspect, in the 4th kind of possible implementation, described device also includes：
3rd determining unit, for the subcarrier degree of rarefication coefficient and the n determined according to first determining unit, determines the bit number of the sub-carrier positions information of the m subcarrier and the bit number k of modulation intelligence2;
Obtaining unit, for the described 1 and k determined according to the 3rd determining unit2, bit map is carried out according to preset mapped mode, the mapped bits collection of sub-carrier positions information and the mapped bits collection of modulation intelligence is obtained.
With reference to the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, the modulating unit, the mapped bits collection of the modulation intelligence for the obtaining unit to be obtained is modulated to m modulation symbol, just it is blunt according to the obtaining unit obtain the sub-carrier positions information mapped bits collection, determine the numbering of the m subcarrier, the m modulation symbol is mapped on the corresponding m subcarrier of the numbering, one in the m modulation symbol is mapped on each subcarrier in the m subcarrier.
With reference to the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation, the modulating unit, for the just blunt mapped bits collection according to the sub-carrier positions information, the numbering of the m subcarrier is determined from preset subcarrier maps table, the subcarrier maps table is used to reflect described The mapped bits collection association corresponding with the numbering of subcarrier of sub-carrier positions information.
Second aspect of the present invention provides the device that a kind of signal is received, including：
Receiving unit, for receiving the modulated signal of carrying on sub-carriers；
Determining unit, for from n subcarrier on transmission channel, it is determined that carrying m subcarrier of the modulated signal that the receiving unit is received, the m to be more than or equal to 1, and the n is more than the m;Demodulating unit, for demodulating the modulated signal from the m subcarrier that the determining unit is determined, obtains the data of transmitting terminal transmission.
With reference to second aspect, in the first possible implementation, described device also includes：Acquiring unit, the acquiring unit, for obtaining subcarrier degree of rarefication coefficient；
The determining unit, for the subcarrier degree of rarefication coefficient obtained according to the acquiring unit, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal.
The first possible implementation with reference to second aspect, in second of possible implementation, the acquiring unit, for going out the m by sub-carrier power blind check, according to the m and n, determines the subcarrier degree of rarefication coefficient.
The first possible implementation with reference to second aspect, in the third possible implementation, the acquiring unit, for the subcarrier degree of rarefication coefficient sent by DCCH or higher layer message receiving end/sending end.
With reference to second aspect, second aspect the first any one into the third possible implementation, in the 4th kind of possible implementation,
The determining unit, is additionally operable to by signal detection algorithm, determines the numbering of the m subcarrier；The demodulating unit, for the numbering of the m subcarrier determined according to the determining unit, the modulated signal is demodulated from the m subcarrier of reference numeral, obtains the data of transmitting terminal transmission.
With reference to the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation, the determining unit, for the numbering according to the m subcarrier, the mapped bits collection of sub-carrier positions information is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
With reference to the 5th kind of possible implementation of second aspect, in the 6th kind of possible implementation, the demodulating unit, for carrying out frequency domain equalization to the m subcarrier, obtain the modulation symbol after m frequency domain equalization, modulation symbol after the m frequency domain equalization is demodulated, modulation letter is obtained The mapped bits collection of breath, by the mapped bits collection of the sub-carrier positions information and the mapped bits collection of the modulation intelligence, is polymerized to the data that the transmitting terminal is sent.
Third aspect present invention provides a kind of method that signal is sent, including：
From n subcarrier on transmission channel, the m subcarrier for carrying data to be transmitted is selected, the m is more than or equal to 1, and the n is more than the m;
The data to be transmitted is modulated into modulated signal, and the modulated signal is mapped on the m subcarrier；
The modulated signal is sent by the m subcarrier.
With reference to the third aspect, in the first possible implementation, in the n subcarrier from transmission channel, select before the m subcarrier for carrying data to be transmitted, methods described also includes：According to the determination information of subcarrier degree of rarefication coefficient, the subcarrier degree of rarefication coefficient is determined, the subcarrier degree of rarefication coefficient is m and n ratio；
According to the subcarrier degree of rarefication coefficient and the n, the m is determined.
The first possible implementation with reference to the third aspect, in second of possible implementation, the determination information according to subcarrier degree of rarefication coefficient determines the subcarrier degree of rarefication coefficient, including：
According to preset communication scenes information and the incidence relation of the subcarrier degree of rarefication coefficient, determine the subcarrier degree of rarefication coefficient, the communication scenes information includes the distance of transmitting terminal and receiving terminal, the speed that receiving terminal is moved relative to transmitting terminal and the load information of the serving cell serviced is provided for the transmitting terminal or the receiving terminal.
The first possible implementation with reference to the third aspect, in the third possible implementation, the determination information according to subcarrier degree of rarefication coefficient determines the subcarrier degree of rarefication coefficient, including：
According to the device type of transmitting terminal, it is determined that compromise balance weight coefficient, the compromise balance weight coefficient is used for the significance level for reflecting Energy Efficiency Ratio；
The subcarrier degree of rarefication coefficient is determined according to efficiency function, the efficiency function is the compromise optimization object function of spectrum efficiency and Energy Efficiency Ratio, when the efficiency function reaches maximum, the degree of rarefication coefficient of corresponding subcarrier is the subcarrier degree of rarefication coefficient.
With reference to the first any one into the third possible implementation of the third aspect, in the 4th kind of possible implementation, it is described the data to be transmitted is modulated on the m subcarrier before, methods described also includes： According to the subcarrier degree of rarefication coefficient and the n, the bit number of the sub-carrier positions information of the m subcarrier and the bit number k of modulation intelligence are determined2;
According to the k o k2, bit map is carried out according to preset mapped mode, the mapped bits collection of sub-carrier positions information and the mapped bits collection of modulation intelligence is obtained.
It is described that the data to be transmitted is modulated on the m subcarrier in the 5th kind of possible implementation with reference to the 4th kind of possible implementation of the third aspect, including：
The mapped bits collection of the modulation intelligence is modulated on m modulation symbol；
Just the blunt mapped bits collection according to the sub-carrier positions information, determines the numbering of the m subcarrier；The m modulation symbol is mapped on the corresponding m subcarrier of the numbering, one in the m modulation symbol is mapped on each subcarrier in the m subcarrier.
With reference to the 5th kind of possible implementation of the third aspect, in the 6th kind of possible implementation, the mapped bits collection according to the sub-carrier positions information determines the numbering of the m subcarrier, including：According to the mapped bits collection of the sub-carrier positions information, the numbering of the m subcarrier is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
Fourth aspect present invention provides a kind of method that signal is received, including：
Receive the modulated signal of carrying on sub-carriers；
From n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal, the m is more than or equal to 1, and the n is more than the m;
The modulated signal is demodulated from the m subcarrier, the data of transmitting terminal transmission are obtained.
With reference to fourth aspect, in the first possible implementation, in the n subcarrier from transmission channel, it is determined that before m subcarrier for carrying modulated signal, methods described also includes：
Obtain subcarrier degree of rarefication coefficient；
In the n subcarrier from transmission channel, it is determined that m subcarrier of modulated signal is carried, including：
According to the subcarrier degree of rarefication coefficient, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal.
The first possible implementation with reference to fourth aspect, in second of possible implementation, the acquisition subcarrier degree of rarefication coefficient, including： The m is gone out by sub-carrier power blind check, according to the m and n, the subcarrier degree of rarefication coefficient is determined.
The first possible implementation with reference to fourth aspect, in the third possible implementation, the acquisition subcarrier degree of rarefication coefficient, including：
The subcarrier degree of rarefication coefficient sent by DCCH or higher layer message receiving end/sending end.
With reference to fourth aspect, fourth aspect the first any one into the third possible implementation, in the 4th kind of possible implementation, it is described demodulate the data from the m subcarrier before, methods described also includes：
By signal detection algorithm, the numbering of the m subcarrier is determined；
It is described to demodulate the modulated signal from the m subcarrier, the data of transmitting terminal transmission are obtained, including：
According to the numbering of the m subcarrier, the modulated signal is demodulated from the m subcarrier of reference numeral, the data of transmitting terminal transmission are obtained.
With reference to the 4th kind of possible implementation of fourth aspect, in the 5th kind of possible implementation, described by signal detection algorithm, after the numbering for determining the m subcarrier, methods described also includes：According to the numbering of the m subcarrier, the mapped bits collection of sub-carrier positions information is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
With reference to the 5th kind of possible implementation of fourth aspect, in the 6th kind of possible implementation, the numbering according to the m subcarrier demodulates the modulated signal from the m subcarrier of reference numeral, the data of transmitting terminal transmission are obtained, including：
Frequency domain equalization is carried out to the m subcarrier, the modulation symbol after m frequency domain equalization is obtained；Modulation symbol after the m frequency domain equalization is demodulated, the mapped bits collection of modulation intelligence is obtained；
By the mapped bits collection of the sub-carrier positions information and the mapped bits collection of the modulation intelligence, the data that the transmitting terminal is sent are polymerized to.
Fifth aspect present invention provides a kind of system of signal transmission, including：The device that the device and signal that signal is sent are received, The device that the signal is sent, for from n subcarrier on transmission channel, select the m subcarrier for carrying data to be transmitted, the m is more than or equal to 1, the n is more than the m, the data to be transmitted is modulated into modulated signal, and the modulated signal is mapped on the m subcarrier.The modulated signal is sent by the m subcarrier；
The device that the signal is received, for receiving the modulated signal of carrying on sub-carriers, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal, the m is more than or equal to 1, the n is more than the m, and the modulated signal is demodulated from the m subcarrier, obtains the data of transmitting terminal transmission.
The embodiment of the present invention from n subcarrier on transmission channel, selects the m subcarrier for carrying data to be transmitted using selecting unit, and the m is more than or equal to 1, and the n is more than the m;The data to be transmitted is modulated into modulated signal by modulating unit, and the modulated signal is mapped on the m subcarrier of the selecting unit selection；Transmitting element sends the modulated signal that the modulating unit is modulated by the m subcarrier.Compared with all subcarriers in busy channel in the prior art send data, the device that signal provided in an embodiment of the present invention is sent, portion subcarriers can be only taken up and send data, so that the degree of rarefication between subcarrier increases, the interference between subcarrier is reduced.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, the accompanying drawing used required in being described below to embodiment is briefly described, apparently, drawings in the following description are only some embodiments of the present invention, for those skilled in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is an embodiment schematic diagram of the method for signal transmission in the embodiment of the present invention；
Fig. 2 is an embodiment schematic diagram of the method for signal reception in the embodiment of the present invention；
Fig. 3 is an embodiment schematic diagram of the device of signal transmission in the embodiment of the present invention；
Fig. 4 is another embodiment schematic diagram of the device of signal transmission in the embodiment of the present invention；
Fig. 5 is another embodiment schematic diagram of the device of signal transmission in the embodiment of the present invention；
Fig. 6 is an embodiment schematic diagram of the device of signal reception in the embodiment of the present invention；
Fig. 7 is another embodiment schematic diagram of the device of signal reception in the embodiment of the present invention；
Fig. 8 is another embodiment schematic diagram of the method for signal transmission in the embodiment of the present invention； Fig. 9 is another embodiment schematic diagram of the method for signal reception in the embodiment of the present invention；
Figure 10 is another embodiment schematic diagram of the device of signal transmission in the embodiment of the present invention；
Figure 11 is another embodiment schematic diagram of the device of signal reception in the embodiment of the present invention；
Figure 12 is an embodiment schematic diagram of the system of signal transmission in the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of method that signal is sent, it is not necessary to takes all subcarriers and carries out signal transmission, so that the interference between reducing subcarrier.The embodiment of the present invention additionally provides corresponding demodulation method, apparatus and system.It is described in detail individually below.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those skilled in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
Transmitting terminal in the embodiment of the present invention can be that the receiving terminal in terminal or base station, the embodiment of the present invention can be base station or terminal.
Refering to Fig. 1, an embodiment of the method that signal provided in an embodiment of the present invention is sent includes：In transmitting terminal, when having data to send, in order to reduce the interference between subcarrier, transmitting terminal selected section subcarrier carrying data, the selection course on portion subcarriers is：
The degree of rarefication coefficient δ of subcarrier is determined, the definition of subcarrier degree of rarefication coefficient is：
Subcarrier number _ m of _ carrying data to be sent
Wherein, w is the total number of subcarrier on transmission channel to the total number of subcarrier on ~ transmission signal；M for carrying modulated signal subcarrier number, with quadrature amplitude modulation in the embodiment of the present invention（M-Quadrature Amplitude Modulation,
M-QAM the explanation carried out exemplified by) modulating, in fact, can also be other modulation systems.The determination method of the degree of rarefication coefficient for the subcarrier that the embodiment of the present invention is provided has two ways：The first is：According to communication scenes information, from the incidence relation of the preset communication scenes information and the subcarrier degree of rarefication coefficient, the subcarrier degree of rarefication coefficient, the communication scenes packet are determined Include the distance of transmitting terminal and receiving terminal, the speed that receiving terminal is moved relative to transmitting terminal and the load information of the serving cell of service is provided for the transmitting terminal or the receiving terminal.
The distance of transmitting terminal and receiving terminal can be measured by path loss and obtained, receiving terminal can be measured by doppler spread relative to the speed that transmitting terminal is moved and obtained, and the load information for the serving cell for providing service for the transmitting terminal or the receiving terminal is the ratio of serving cell actual throughput rates and serving cell maximum throughput rate.
On according to communication scenes information, determining the process of the subcarrier degree of rarefication coefficient, it can be understood refering to following example：
As shown in Table 1 and Table 2, table 1 is the look-up table for loading subcarrier degree of rarefication coefficient when being less than 50% of serving cell, and table 2 is the look-up table for loading subcarrier degree of rarefication coefficient when being more than 50% of serving cell.
30~100Km/h 0.7 0.5 0.4
100 ~ 300Km/h 0.4 0.3 0.2 is as shown in Table 1 and Table 2, the speed that is moved according to the distance of transmitting terminal and receiving terminal, receiving terminal relative to transmitting terminal and be that the transmitting terminal or the receiving terminal provide the load information of serving cell of service these three dimensions, can find corresponding subcarrier degree of rarefication coefficient from table 1.Certainly, Tables 1 and 2 is citing, in fact, the more fine granularity that Tables 1 and 2 can also be done, load can according to 20%, 10%-individual shelves are divided, certainly, stepping scope can also be smaller, or other numerical value, the scope of speed can also be smaller, the scope of distance can also be smaller, so, and obtained subcarrier degree of rarefication coefficient will be more accurate.Second determination subcarrier degree of rarefication coefficient method can be：Subcarrier degree of rarefication coefficient is determined according to spectrum efficiency and Energy Efficiency Ratio compromise, detailed process can be：According to the device type of transmitting terminal, it is determined that compromise balance weight coefficient, the compromise balance weight coefficient is used for the significance level for reflecting Energy Efficiency Ratio；
The subcarrier degree of rarefication coefficient is determined according to efficiency function, the efficiency function is the compromise optimization object function of spectrum efficiency and Energy Efficiency Ratio, when the efficiency function reaches maximum, corresponding subcarrier degree of rarefication coefficient is the subcarrier degree of rarefication coefficient determined.
The compromise optimization object function of spectrum efficiency and Energy Efficiency Ratio is defined, i.e., " efficiency function "：
Wherein, SE is frequency language efficiency to R (A, SE^)=(l-Λ)-SE+Λ-η, and η is Energy Efficiency Ratio, and Α is compromise balance weight coefficient, reflects the significance level of Energy Efficiency Ratio, 0≤≤ 1.The computational methods of spectrum efficiency and Energy Efficiency Ratio are respectively： SE =S2, " ' ^-^ (bit/s/Hz) --- frequency Acquaintance efficiency；
n η = ¾2 η )^-^ (bit/s/w) --- Energy Efficiency Ratio；
m - psc Psc--- the power of single sub-carrier.
Wherein, ", it is known that
First, according to the device type of transmitting terminal, requirement difference of the suitable different types of equipment to Energy Efficiency Ratio is chosen, following table is an example：
The relation of the device type of table 3 and compromise balance weight coefficient
Then, by selecting optimal subcarrier degree of rarefication coefficient ^ compromise optimization object function is reached maximum：
δ - arg max (R ΞΕ,η^)
δ
When compromise optimization object function reaches that maximum, that is, efficiency function reach that the degree of rarefication coefficient of corresponding subcarrier during maximum is the subcarrier degree of rarefication coefficient ^.
After subcarrier degree of rarefication coefficient ^ is determined, determined to carry the η δ of number m, m bis- of the subcarrier of data according to subcarrier degree of rarefication coefficient δ, because " it is known, it is determined that so, m can be directly obtained.Then, in addition it is also necessary to it is determined that total transmission bit number, total sends the bit number that bit number includes bit number ^ and the M-QAM modulation intelligence of sub-carrier positions information.
K = t + k Wherein ,=l iog2(c;) | --- sub-carrier positions information bit number;
M subcarrier is selected from individual subcarrier, (C is co-existed inm) plant combination
L " represents to round downwards.
k2 =m-\og2(M) be in the bit number of M-QAM modulation intelligences, the embodiment of the present invention with
The explanation carried out exemplified by M-QAM modulation, is actually not limited to M-QAM modulation.
It is log because single M-QAM modulated sub-carriers carry information bit number2(M) it is ^=m.log that, therefore, m M-QAM modulated sub-carriers, which carry information bit number,2(M)。
It is determined that and after, by bit map, data transfer bit stream (, Α) is decomposed into two parts：The mapped bits collection of sub-carrier positions information and the mapped bits collection of M-QAM modulation intelligences
Bit mapping mode can include：Centralized bit map and distributed bit map.
Method 1:Centralized bit map.
By bit before transmitted bit stream (^, Α) as sub-carrier positions information mapped bits collection (Α,···,¾), last bits as M-QAM modulation intelligences mapped bits collection (,).
W iS k, =3, k2=6, then the result after the mapping obtained by centralized bit map can be understood refering to table 4：
The centralized bit map of table 4
It can be read from table 4, as=3, k2=6, first three bit isA、 p2With;3, rear- Individual bit is, q2 , q3、 q4、 、 q6.Method 2:Distributed bit map：By transmitted bit stream, A) extracted at equal intervals bit is used as mapped bits collection of remaining bit of the mapped bits collection of sub-carrier positions information as M-QAM modulation intelligences
Assuming that=3, table 5 is understood：The centralized bit map of table 5
It can be read from table 5, as ^=3, k2 =6 , A、 p2And p3, it is equally spaced be interspersed in,, q4, it is middle.
After bit map, by the mapped bits collection of M-QAM modulation intelligences (,2) it is mapped to (W^ on m modulation symbol.Then, according to the mapped bits collection of the sub-carrier positions information (Α/ ^), the numbering of the m subcarrier is determined from preset subcarrier maps table, will (, modulation symbol, it is mapped on the corresponding subcarrier of numbering, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
Subcarrier maps table is to be set in advance in transmitting terminal and receiving terminal.
^ mouthfuls of example：When M=4, m=2, k ,=2, shellfish1Under ^ mouthfuls of J subcarrier maps tables：
The subcarrier maps of table 6（
The mapped bits collection subcarrier number set of sub-carrier positions information： ^,…,^)
00 { Isosorbide-5-Nitrae } 01 { 1,3 }
10 {2,4}
11 { 1,2 } understood refering to table 6, the mapped bits of sub-carrier positions information are concentrated and contain 00,01,10 and 11 4 kind of situation, it is every kind of all to that should have the numbering of one group of subcarrier, the subcarrier of which specifically chosen group # is used to carry data, can be understood refering to following rule：
(1) for each group of sub-carrier positions information mapped bits collection (Α,/^) one unique corresponding subcarrier number set of selection：^ ..., ^^,
Wherein, e { l ,-", " }, Vz, and j'.
(2) each is gatheredCm, rninflc is met, maximum (i ≠ j is reached
It is understandable that refering to table 6：The corresponding numbering { Isosorbide-5-Nitrae } of prioritizing selection 00, can so ensure that the interval for carrying two sub- intercarriers of data is maximum, interference is minimum.
Table 6, when only selecting a subcarrier to be used to carry data, can be understood with selecting the explanation that two sub- carriers carry data instances are carried out refering to the example of table 7：
￡ is set "=8, /=1, k ,=3, then subcarrier maps table is as follows：
The subcarrier maps of table 7（"=8, m=l, ^=3)
The mapped bits collection subcarrier number set of sub-carrier positions information：
...
000 {1}
001 {2}
010 {3}
011 {4} 100 {5}
101 {6}
110 {7}
111 { 8 } as shown in Table 7, when only selecting subcarrier to be used to carry data, in transmission bandwidth, no inter-sub-carrier interference.So, any subcarrier in table 7 can be selected to be used to carry data.By m (^ ...,；) modulation symbol, after being mapped on the corresponding subcarrier of numbering, by inverse fast Fourier transform (IFFT, Inverse Fast Fourier Transformation), frequency i or signal are transformed to time domain ^ signals.Again by parallel-serial conversion, parallel data block is transformed to serial data stream.The cyclic prefix for anti-multipath is added in the head of data flow（Cycle Prefix, CP), then data flow is sent.More than, it is that data are in the processing procedure of transmitting terminal in the embodiment of the present invention, transmitting terminal can only take up portion subcarriers and send data, so that the interval increase between subcarrier, reduces the interference between subcarrier.Moreover, when taking at least two subcarriers, the interval being used between the subcarrier of carrying data is tried one's best greatly, so that the interference between reduce further subcarrier.
The scheme that the embodiment of the present invention is provided, can also reduce the interference of minizone, because when the probability that in the case of multiple cell, the subcarrier of this cell and adjacent cell collides declines, so the interference reduction of minizone.
Refering to Fig. 2, an embodiment of the method that the signal provided in the embodiment of the present invention is received includes：In receiving terminal, receiving terminal is received after the data flow of carrying on sub-carriers, first removes the cyclic prefix for anti-multipath（Cycle Prefix, CP), serial data stream is then transformed to parallel data block.Time-domain signal is transformed to by frequency-region signal by Fast Fourier Transform (FFT) (Fast Fourier Transformation, FFT) again.
Receiving terminal can know the total number of subcarrier on transmission channel in advance by the following two kinds method《.Method 1:If transmission bandwidth is fixed, receiving terminal may directly learn that n values, such as IEEE 802.11n/g.Method 2:If transmission bandwidth is variable, transmitting terminal notifies receiving terminal by DCCH《Value, Such as LTE.
Then carry out the process of channel estimation, channel estimation be by channel response/z on pilot tone estimated data subcarrier (^, wherein be subcarrier number, the I of k bis-, η.
Receiving terminal obtains subcarrier degree of rarefication coefficient ^ and can obtained by the following two kinds method：
Method 1:Receiving terminal goes out the number m of M-QAM modulated sub-carriers by the information blind check such as sub-carrier power, so as to estimate subcarrier degree of rarefication coefficient.
Method 2:Transmitting terminal can be used by way of being semi-statically configured DCCH or higher layer message notice receiving terminal carrier wave degree of rarefication coefficient ^ and reduce signaling consumption.For example, some cycles, send a subcarrier degree of rarefication coefficient in such as 15 minutes or 30 minutes.
Calculate number m=w of M-QAM modulated sub-carriers.
Pass through signal detection algorithm, such as log-likelihood ratio（LLR, Log-Likelihood Ratio) algorithm detects to belong to the subcarrier number set of M-QAM modulation：.
Detailed process is：If receipt signal model is：Wherein, it is transmission signal on subcarrier, is the channel response on subcarrier, Ι is the reception signal on subcarrier, is the noise on subcarrier, variance is σ2.Value：Or 0, eS --- S be M-QAM modulation constellation point sets, 4=1, " --- subcarrier number.
Define log-likelihood ratio：
P x (k)=0 r (k j are reflected in receive r (/t) under conditions of, χ, 1 for M-QAM modulated signals probability with=0 ^ both the ratio between rates. Utilize Bayesian formula and total probability formula, and r^) conditional probability density function obey multiple Gauss distribution, can abbreviation obtain：
The maximum preceding m subcarrier judgement of selection is M-QAM modulated sub-carriers, so as to obtain the subcarrier number set of M-QAM modulation： { ,. , ij.Obtain the subcarrier number set of M-QAM modulation：..., after ^, it is possible to sub-carrier positions information bit collection ^ ... ,/^ are gone out by the subcarrier maps table demapping of the numbering set and above-mentioned transmitting terminal), for example：When numbering is { Isosorbide-5-Nitrae }, it is possible to which, according to table 6, the mapped bits collection for obtaining corresponding sub-carrier positions information is 00.Then, frequency domain equalization is carried out to m M-QAM modulated sub-carriers using channel estimation, obtains the modulation symbol after m frequency domain equalization.Modulation symbol after m frequency domain equalization is demodulated, M-QAM modulation letters are obtained
Then, lead to and
The mapped bits collection ^ ... of M-QAM modulation intelligences) merge into more than original transmitted bit stream, the method that signal provided in an embodiment of the present invention is received, it is only necessary to the demodulating data from portion subcarriers, so as to improve the speed of demodulation.
Refering to Fig. 3, an embodiment of the device 30 that signal provided in an embodiment of the present invention is sent includes：Selecting unit 301, for from η subcarrier on transmission channel, selecting the m subcarrier for carrying data to be transmitted, the m is more than or equal to 1, and the n is more than the m;
Modulating unit 302, for the data to be transmitted to be modulated into modulated signal, and the modulated signal is mapped on the m subcarrier that the selecting unit 301 is selected；
Transmitting element 303, for sending the institute that the modulating unit 302 is modulated by the m subcarrier State modulated signal.
In the embodiment of the present invention, selecting unit 301 selects the m subcarrier for carrying data to be transmitted from n subcarrier on transmission channel, and the m is more than or equal to 1, and the n is more than the m;The data to be transmitted is modulated into modulated signal by modulating unit 302, and the modulated signal is mapped on the m subcarrier that the selecting unit 301 is selected；Transmitting element 303 sends the modulated signal that the modulating unit 302 is modulated by the m subcarrier.Compared with all subcarriers in busy channel in the prior art send data, the device that signal provided in an embodiment of the present invention is sent, portion subcarriers can be only taken up and send data, so that the degree of rarefication between subcarrier increases, the interference between subcarrier is reduced.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 3, refering in another embodiment of Fig. 4, signal provided in an embodiment of the present invention device 30 sent, described device 30 also includes：
First determining unit 304, for before the m subcarrier that the selecting unit 301 selects for carrying data to be transmitted, according to the determination information of subcarrier degree of rarefication coefficient, the subcarrier degree of rarefication coefficient is determined, the subcarrier degree of rarefication coefficient is m and n ratio；
Second determining unit 305, for the subcarrier degree of rarefication coefficient and the n determined according to first determining unit 304, determines the m.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 4, in another embodiment for the device 30 that signal provided in an embodiment of the present invention is sent,
First determining unit 304, for the incidence relation according to preset communication scenes information and the subcarrier degree of rarefication coefficient, determine the subcarrier degree of rarefication coefficient, the communication scenes information includes the distance of transmitting terminal and receiving terminal, the speed that receiving terminal is moved relative to transmitting terminal and the load information of the serving cell serviced is provided for the transmitting terminal or the receiving terminal.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 4, in another embodiment for the device 30 that signal provided in an embodiment of the present invention is sent,
First determining unit 304, for the device type according to transmitting terminal, it is determined that compromise balance weight coefficient, the compromise balance weight coefficient is used for the significance level for reflecting Energy Efficiency Ratio；The subcarrier degree of rarefication coefficient is determined according to efficiency function, the efficiency function is the compromise optimization object function of spectrum efficiency and Energy Efficiency Ratio, when the efficiency function reaches maximum, the degree of rarefication coefficient of corresponding subcarrier is the subcarrier degree of rarefication coefficient.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 4, refering to Fig. 5, the embodiment of the present invention is provided Signal send device 30 another embodiment in, described device 30 also includes：
3rd determining unit 306, for the subcarrier degree of rarefication coefficient and the n determined according to first determining unit 304, determines the bit number of the sub-carrier positions information of the m subcarrier and the bit number k of modulation intelligence2;
Obtaining unit 307, for according to the 3rd determining unit 306 determine described in and k2, bit map is carried out according to preset mapped mode, the mapped bits collection of sub-carrier positions information and the mapped bits collection of modulation intelligence is obtained.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 5, in another embodiment for the device 30 that signal provided in an embodiment of the present invention is sent,
The modulating unit 302, the mapped bits collection of the modulation intelligence for the obtaining unit to be obtained is modulated to m modulation symbol, just it is blunt according to the obtaining unit obtain the sub-carrier positions information mapped bits collection, determine the numbering of the m subcarrier, the m modulation symbol is mapped on the corresponding m subcarrier of the numbering, one in the m modulation symbol is mapped on each subcarrier in the m subcarrier.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 5, in another embodiment for the device 30 that signal provided in an embodiment of the present invention is sent,
The modulating unit 302, for the mapped bits collection according to the sub-carrier positions information, the numbering of the m subcarrier is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
The process performed by device sent for signal can understand that this place, which is not done, excessively to be repeated refering to the corresponding contents of Fig. 1.Refering to Fig. 6, an embodiment of the device 40 that signal provided in an embodiment of the present invention is received includes：Receiving unit 401, for receiving the modulated signal of carrying on sub-carriers；
Determining unit 402, for from n subcarrier on transmission channel, it is determined that carrying m subcarrier of the modulated signal that the receiving unit 401 is received, the m to be more than or equal to 1, and the n is more than the m;
Demodulating unit 403, for demodulating the modulated signal from the m subcarrier that the determining unit 402 is determined, obtains the data of transmitting terminal transmission. In the embodiment of the present invention, receiving unit 401 receives the modulated signal of carrying on sub-carriers, determining unit 402 is from n subcarrier on transmission channel, it is determined that carrying m subcarrier of the modulated signal that the receiving unit 401 is received, the m is more than or equal to 1, the n is more than the m, and demodulating unit 403 demodulates the modulated signal from the m subcarrier that the determining unit 402 is determined, obtains the data of transmitting terminal transmission.Compared with needing from demodulating data on each subcarrier in the prior art, the device that signal provided in an embodiment of the present invention is received, it is only necessary to the demodulating data from portion subcarriers, so as to improve the speed of demodulation.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 6, refering to Fig. 7, in another embodiment for filling 40 that signal provided in an embodiment of the present invention is received, described device 40 also includes：Acquiring unit 404,
The acquiring unit 404, for obtaining subcarrier degree of rarefication coefficient；
The determining unit 402, for the subcarrier degree of rarefication coefficient obtained according to the acquiring unit 404, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 7, in another embodiment for filling 40 that signal provided in an embodiment of the present invention is received,
The acquiring unit 404, for going out the m by sub-carrier power blind check, according to the m and n, determines the subcarrier degree of rarefication coefficient.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 7, in another embodiment for filling 40 that signal provided in an embodiment of the present invention is received,
The acquiring unit 404, for the subcarrier degree of rarefication coefficient sent by DCCH or higher layer message receiving end/sending end.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 7, in another embodiment for filling 40 that signal provided in an embodiment of the present invention is received,
The determining unit 402, is additionally operable to by signal detection algorithm, determines the numbering of the m subcarrier；
The demodulating unit 403, for the numbering of the m subcarrier determined according to the determining unit 402, the modulated signal is demodulated from the m subcarrier of reference numeral, obtains the data of transmitting terminal transmission.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 7, in another embodiment for filling 40 that signal provided in an embodiment of the present invention is received, The determining unit 402, for the numbering according to the m subcarrier, the mapped bits collection of sub-carrier positions information is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 7, in another embodiment for filling 40 that signal provided in an embodiment of the present invention is received,
The demodulating unit 402, for carrying out frequency domain equalization to the m subcarrier, obtain the modulation symbol after m frequency domain equalization, modulation symbol after the m frequency domain equalization is demodulated, obtain the mapped bits collection of modulation intelligence, by the mapped bits collection of the sub-carrier positions information and the mapped bits collection of the modulation intelligence, the data that the transmitting terminal is sent are polymerized to.
Refering to Fig. 8, another embodiment for the method that signal provided in an embodiment of the present invention is sent includes：
501st, from n subcarrier on transmission channel, the m subcarrier for carrying data to be transmitted is selected, the m is more than or equal to 1, and the n is more than the m.
502nd, the data to be transmitted is modulated into modulated signal, and the modulated signal is mapped on the m subcarrier.
503rd, the modulated signal is sent by the m subcarrier.
In the embodiment of the present invention, from n subcarrier on transmission channel, select the m subcarrier for carrying data to be transmitted, the m is more than or equal to 1, the n is more than the m, the data to be transmitted is modulated into modulated signal, and the modulated signal is mapped on the m subcarrier, the modulated signal is sent by the m subcarrier.Compared with all subcarriers in busy channel in the prior art send data, method provided in an embodiment of the present invention can only take up portion subcarriers and send data, so that the probability that collision is sent between subcarrier declines, reduce the interference between subcarrier.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 8, in one alternative embodiment of the method that signal provided in an embodiment of the present invention is sent, in the n subcarrier from transmission channel, select before the m subcarrier for carrying data to be transmitted, methods described can also include：
According to the determination information of subcarrier degree of rarefication coefficient, the subcarrier degree of rarefication coefficient is determined, the subcarrier degree of rarefication coefficient is m and n ratio；
According to the subcarrier degree of rarefication coefficient and the n, the m is determined.
Alternatively, on the basis of the corresponding alternative embodiments of above-mentioned Fig. 8, in another alternative embodiment for the method that signal provided in an embodiment of the present invention is sent, the determination information according to subcarrier degree of rarefication coefficient, The subcarrier degree of rarefication coefficient is determined, can be included：
According to preset communication scenes information and the incidence relation of the subcarrier degree of rarefication coefficient, determine the subcarrier degree of rarefication coefficient, the communication scenes information includes the distance of transmitting terminal and receiving terminal, the speed that receiving terminal is moved relative to transmitting terminal and the load information of the serving cell serviced is provided for the transmitting terminal or the receiving terminal.
Alternatively, on the basis of the corresponding alternative embodiments of above-mentioned Fig. 8, in another alternative embodiment for the method that signal provided in an embodiment of the present invention is sent, the determination information according to subcarrier degree of rarefication coefficient, the subcarrier degree of rarefication coefficient is determined, can be included：
According to the device type of transmitting terminal, it is determined that compromise balance weight coefficient, the compromise balance weight coefficient is used for the significance level for reflecting Energy Efficiency Ratio；
The subcarrier degree of rarefication coefficient is determined according to efficiency function, the efficiency function is the compromise optimization object function of spectrum efficiency and Energy Efficiency Ratio, when the efficiency function reaches maximum, the degree of rarefication coefficient of corresponding subcarrier is the subcarrier degree of rarefication coefficient.
Alternatively, on the basis of the corresponding alternative embodiments of above-mentioned Fig. 8, in another alternative embodiment for the method that signal provided in an embodiment of the present invention is sent, it is described the data to be transmitted is modulated on the m subcarrier before, methods described can also include：
According to the subcarrier degree of rarefication coefficient and the n, determine to need the bit number and the bit number k of modulation intelligence of the sub-carrier positions information of the data of carrying in the m subcarrier2;
According to the k o k2, bit map is carried out according to preset mapped mode, the mapped bits collection of sub-carrier positions information and the mapped bits collection of modulation intelligence is obtained.
Alternatively, it is described that the data to be transmitted is modulated on the m subcarrier in another alternative embodiment for the method that signal provided in an embodiment of the present invention is sent on the basis of the corresponding alternative embodiments of above-mentioned Fig. 8, it can include：
The mapped bits collection of the modulation intelligence is modulated on m modulation symbol；
Just the blunt mapped bits collection according to the sub-carrier positions information, determines the numbering of the m subcarrier；The m modulation symbol is mapped on the corresponding m subcarrier of the numbering, one in the m modulation symbol is mapped on each subcarrier in the m subcarrier.
Alternatively, on the basis of the corresponding alternative embodiments of above-mentioned Fig. 8, in another alternative embodiment for the method that signal provided in an embodiment of the present invention is sent, the mapped bits according to the sub-carrier positions information Collection, determines the numbering of the m subcarrier, can include：
According to the mapped bits collection of the sub-carrier positions information, the numbering of the m subcarrier is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
It can understand that this place, which is not done, excessively to be repeated refering to the corresponding contents of Fig. 1 for the method that signal is sent.
Refering to Fig. 9, an embodiment of the method that a kind of signal provided in an embodiment of the present invention is received includes：
601st, the modulated signal of carrying on sub-carriers is received.
602nd, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal, the m is more than or equal to 1, and the n is more than the m.
603rd, the modulated signal is demodulated from the m subcarrier, obtains the data of transmitting terminal transmission.The modulated signal of carrying on sub-carriers is received in the embodiment of the present invention, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal, the m is more than or equal to 1, the n is more than the m, the modulated signal is demodulated from the m subcarrier, the data of transmitting terminal transmission are obtained.Compared with needing from demodulating data on each subcarrier in the prior art, demodulation method provided in an embodiment of the present invention, it is only necessary to the demodulating data from portion subcarriers, so as to improve the speed of demodulation.
Alternatively, on the basis of the corresponding embodiments of above-mentioned Fig. 9, in another embodiment for the method that signal provided in an embodiment of the present invention is received, in the n subcarrier from transmission channel, it is determined that before m subcarrier for carrying modulated signal, methods described can also include：
Obtain subcarrier degree of rarefication coefficient；
In the n subcarrier from transmission channel, it is determined that carrying m subcarrier of modulated signal, it can include：
According to the subcarrier degree of rarefication coefficient, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal.
Alternatively, on the basis of the corresponding alternative embodiments of above-mentioned Fig. 9, in another embodiment for the method that signal provided in an embodiment of the present invention is received, the acquisition subcarrier degree of rarefication coefficient can include：
The m is gone out by sub-carrier power blind check, according to the m and n, the subcarrier degree of rarefication coefficient is determined.
Alternatively, on the basis of the corresponding alternative embodiments of above-mentioned Fig. 9, letter provided in an embodiment of the present invention Number receive method another embodiment in, it is described acquisition subcarrier degree of rarefication coefficient, can include：The subcarrier degree of rarefication coefficient sent by DCCH or higher layer message receiving end/sending end.
Alternatively, on the basis of the corresponding alternative embodiments of above-mentioned Fig. 9, in another embodiment for the method that signal provided in an embodiment of the present invention is received, it is described demodulate the data from the m subcarrier before, methods described can also include：
By signal detection algorithm, the numbering of the m subcarrier is determined；
It is described to demodulate the modulated signal from the m subcarrier, the data of transmitting terminal transmission are obtained, including：
According to the numbering of the m subcarrier, the modulated signal is demodulated from the m subcarrier of reference numeral, the data of transmitting terminal transmission are obtained.
Alternatively, it is described to pass through signal detection algorithm in another embodiment for the method that signal provided in an embodiment of the present invention is received on the basis of the corresponding alternative embodiments of above-mentioned Fig. 9, after the numbering for determining the m subcarrier, methods described can also include：
According to the numbering of the m subcarrier, the mapped bits collection of sub-carrier positions information is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
Alternatively, on the basis of the corresponding alternative embodiments of above-mentioned Fig. 9, in another embodiment for the method that signal provided in an embodiment of the present invention is received, the numbering according to the m subcarrier, the modulated signal is demodulated from the m subcarrier of reference numeral, the data of transmitting terminal transmission are obtained, can be included：
Frequency domain equalization is carried out to the m subcarrier, the modulation symbol after m frequency domain equalization is obtained.Modulation symbol after the m frequency domain equalization is demodulated, the mapped bits of modulation intelligence is obtained by the mapped bits collection of the sub-carrier positions information and the mapped bits collection of the modulation intelligence, is polymerized to the data that the transmitting terminal is sent.
It can understand that this place, which is not done, excessively to be repeated refering to the corresponding contents of Fig. 2 for the method that signal is received.
It can understand for the process performed by the device of signal reception refering to the corresponding contents of Fig. 2, this Place, which is not done, excessively to be repeated.Figure 10 is the structural representation for the device 30 that signal of the embodiment of the present invention is sent.The device 30 that signal is sent may include input equipment 310, output equipment 320, processor 330 and memory 340.
Memory 340 can include read-only storage and random access memory, and provide instruction and data to processor 330.The a part of of memory 340 can also include nonvolatile RAM (NVRAM).
Memory 340 stores following element, can perform module either data structure or their subset, or their superset：
Operational order：Including various operational orders, for realizing various operations.
Operating system：Including various system programs, for realizing various basic businesses and handling hardware based task.
In embodiments of the present invention, by calling the operational order that memory 340 is stored, (operational order is storable in operating system processor 330）, perform following operation：
From n subcarrier on transmission channel, the m subcarrier for carrying data to be transmitted is selected, the m is more than or equal to 1, and the n is more than the m;
The data to be transmitted is modulated into modulated signal, and the modulated signal is mapped on the m subcarrier；
The modulated signal is sent by the m subcarrier.
In the embodiment of the present invention, the device 30 that signal provided in an embodiment of the present invention is sent can only take up portion subcarriers and send data, so that the degree of rarefication between subcarrier increases, reduce the interference between subcarrier.
The operation for the device 30 that the control signal of processor 330 is sent, processor 330 can also be referred to as CPU (Central Processing Unit, CPU；).Memory 340 can include read-only storage and random access memory, and provide instruction and data to processor 330.The a part of of memory 340 can also include nonvolatile RAM（NVRAM ).In specific application, each component for the device 30 that signal is sent is combined by bus system 350, and wherein bus system 350 can also include power bus, controlling bus and status signal bus in addition etc. in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 350 in figure. The method that the embodiments of the present invention are disclosed can apply in processor 330, or be realized by processor 330.Processor 330 is probably a kind of IC chip, the disposal ability with signal.In implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 330 or the instruction of software form.Above-mentioned processor 330 can be general processor, digital signal processor (DSP), application specific integrated circuit（ASIC), ready-made programmable gate array（) or other PLDs, discrete gate or transistor logic, discrete hardware components FPGA.It can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be microprocessor or the processor can also be any conventional processor etc..The step of method with reference to disclosed in the embodiment of the present invention, can be embodied directly in hardware decoding processor and perform completion, or perform completion with the hardware in decoding processor and software module combination.Software module can be located in random access memory, flash memory, read-only storage, the ripe storage medium in this area such as programmable read only memory or electrically erasable programmable memory, register.The storage medium is located at memory 340, and processor 330 reads the information in memory 340, the step of completing the above method with reference to its hardware.
Alternatively, the processor 330 is additionally operable to：
According to the determination information of subcarrier degree of rarefication coefficient, the subcarrier degree of rarefication coefficient is determined, the subcarrier degree of rarefication coefficient is m and n ratio；
According to the subcarrier degree of rarefication coefficient and the n, the m is determined.
Alternatively, the processor 330 specifically for：
According to preset communication scenes information and the incidence relation of the subcarrier degree of rarefication coefficient, determine the subcarrier degree of rarefication coefficient, the communication scenes information includes the distance of transmitting terminal and receiving terminal, the speed that receiving terminal is moved relative to transmitting terminal and the load information of the serving cell serviced is provided for the transmitting terminal or the receiving terminal.
Alternatively, the processor 330 specifically for：
According to the device type of transmitting terminal, it is determined that compromise balance weight coefficient, the compromise balance weight coefficient is used for the significance level for reflecting Energy Efficiency Ratio；
The subcarrier degree of rarefication coefficient is determined according to efficiency function, the efficiency function is the compromise optimization object function of spectrum efficiency and Energy Efficiency Ratio, when the efficiency function reaches maximum, the degree of rarefication coefficient of corresponding subcarrier is the subcarrier degree of rarefication coefficient. Alternatively, the processor 330 is additionally operable to：
According to the subcarrier degree of rarefication coefficient and the n, the bit number of the sub-carrier positions information of the m subcarrier and the bit number k of modulation intelligence are determined2;
According to described 1 and 1, bit map is carried out according to preset mapped mode, the mapped bits collection of sub-carrier positions information and the mapped bits collection of modulation intelligence is obtained.
Alternatively, the processor 330 specifically for：
The mapped bits collection of the modulation intelligence is modulated on m modulation symbol；
Just the blunt mapped bits collection according to the sub-carrier positions information, determines the numbering of the m subcarrier；The m modulation symbol is mapped on the corresponding m subcarrier of the numbering, one in the m modulation symbol is mapped on each subcarrier in the m subcarrier.
Alternatively, the processor 330 specifically for：
According to the mapped bits collection of the sub-carrier positions information, the numbering of the m subcarrier is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
Figure 11 is the structural representation for the device 40 that signal of the embodiment of the present invention is received.The device 40 that signal is received may include input equipment 410, output equipment 420, processor 430 and memory 440.
Memory 440 can include read-only storage and random access memory, and provide instruction and data to processor 430.The a part of of memory 440 can also include nonvolatile RAM (NVRAM).
Memory 440 stores following element, can perform module either data structure or their subset, or their superset：
Operational order：Including various operational orders, for realizing various operations.
Operating system：Including various system programs, for realizing various basic businesses and handling hardware based task.
In embodiments of the present invention, by calling the operational order that memory 440 is stored, (operational order is storable in operating system processor 430）, perform following operation： The modulated signal of carrying on sub-carriers is received by input equipment 410；
From n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal, the m is more than or equal to 1, and the n is more than the m;
The modulated signal is demodulated from the m subcarrier, the data of transmitting terminal transmission are obtained.
In the embodiment of the present invention, the device 40 that signal provided in an embodiment of the present invention is received, it is only necessary to the demodulating data from portion subcarriers, so as to improve the speed of demodulation.
The operation for the device 40 that the control signal of processor 430 is received, processor 430 can also be referred to as CPU (Central Processing Unit, CPU；).Memory 440 can include read-only storage and random access memory, and provide instruction and data to processor 430.The a part of of memory 440 can also include nonvolatile RAM（NVRAM ).In specific application, each component for the device 40 that signal is received is combined by bus system 450, and wherein bus system 450 can also include power bus, controlling bus and status signal bus in addition etc. in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 450 in figure.
The method that the embodiments of the present invention are disclosed can apply in processor 430, or be realized by processor 430.Processor 430 is probably a kind of IC chip, the disposal ability with signal.In implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 430 or the instruction of software form.Above-mentioned processor 430 can be general processor, digital signal processor (DSP), application specific integrated circuit（ASIC), ready-made programmable gate array（) or other PLDs, discrete gate or transistor logic, discrete hardware components FPGA.It can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be microprocessor or the processor can also be any conventional processor etc..The step of method with reference to disclosed in the embodiment of the present invention, can be embodied directly in hardware decoding processor and perform completion, or perform completion with the hardware in decoding processor and software module combination.Software module can be located in random access memory, flash memory, read-only storage, the ripe storage medium in this area such as programmable read only memory or electrically erasable programmable memory, register.The storage medium is located at memory 440, and processor 430 reads the information in memory 440, the step of completing the above method with reference to its hardware.
Alternatively, the processor 430 is additionally operable to：
Obtain subcarrier degree of rarefication coefficient； In the n subcarrier from transmission channel, it is determined that m subcarrier of modulated signal is carried, including：
According to the subcarrier degree of rarefication coefficient, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal.
Alternatively, the processor 430 specifically for：
The m is gone out by sub-carrier power blind check, according to the m and n, the subcarrier degree of rarefication coefficient is determined.
Alternatively, the input equipment 410 is additionally operable to：
The subcarrier degree of rarefication coefficient sent by DCCH or higher layer message receiving end/sending end
Alternatively, the processor 430 is additionally operable to：
By signal detection algorithm, the numbering of the m subcarrier is determined；
It is described to demodulate the modulated signal from the m subcarrier, the data of transmitting terminal transmission are obtained, including：
According to the numbering of the m subcarrier, the modulated signal is demodulated from the m subcarrier of reference numeral, the data of transmitting terminal transmission are obtained.
Alternatively, the processor 430 is additionally operable to：
According to the numbering of the m subcarrier, the mapped bits collection of sub-carrier positions information is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
Alternatively, the processor 430 specifically for：
Frequency domain equalization is carried out to the m subcarrier, the modulation symbol after m frequency domain equalization is obtained；Modulation symbol after the m frequency domain equalization is demodulated, the mapped bits of modulation intelligence is obtained by the mapped bits collection of the sub-carrier positions information and the mapped bits collection of the modulation intelligence, is polymerized to the data that the transmitting terminal is sent.Refering to Figure 12, an embodiment of the system of signal transmission provided in an embodiment of the present invention includes：The device 40 that the device 30 and signal that signal is sent are received, The device 30 that the signal is sent, for from n subcarrier on transmission channel, select the m subcarrier for carrying data to be transmitted, the m is more than or equal to 1, the n is more than the m, the data to be transmitted is modulated into modulated signal, and the modulated signal is mapped on the m subcarrier.The modulated signal is sent by the m subcarrier；
The device 40 that the signal is received, for receiving the modulated signal of carrying on sub-carriers, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal, the m is more than or equal to 1, the n is more than the m, and the modulated signal is demodulated from the m subcarrier, obtains the data of transmitting terminal transmission.
The system of signal transmission provided in an embodiment of the present invention, can only take up portion subcarriers and send data, so that the degree of rarefication between subcarrier increases, reduce the interference between subcarrier.One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment can be by program to instruct the hardware of correlation to complete, the program can be stored in a computer-readable recording medium, and storage medium can include：ROM, RAM, disk or CD etc..
The explanation that the signal transmission provided above the embodiment of the present invention, the method received, device and system carry out above example is only intended to the method and its core concept for helping to understand the present invention；Simultaneously for those of ordinary skill in the art, according to the thought of the present invention, it will change in specific embodiments and applications, in summary, this specification content should not be construed as limiting the invention.

Claims (1)

  1. Claim
    1st, the device that a kind of signal is sent, it is characterised in that including：
    Selecting unit, for from transmission channelnIn individual subcarrier, the m subcarrier for carrying data to be transmitted is selected, the m is more than or equal to 1, and the n is more than the m;
    Modulating unit, for the data to be transmitted to be modulated into modulated signal, and the modulated signal is mapped on the m subcarrier of the selecting unit selection；
    Transmitting element, for sending the modulated signal that the modulating unit is modulated by the m subcarrier.
    2nd, device according to claim 1, it is characterised in that described device also includes：
    First determining unit, for before the m subcarrier that the selecting unit selects for carrying data to be transmitted, according to the determination information of subcarrier degree of rarefication coefficient, the subcarrier degree of rarefication coefficient is determined, the subcarrier degree of rarefication coefficient is m and n ratio；
    Second determining unit, for the subcarrier degree of rarefication coefficient and the n determined according to first determining unit, determines the m.
    3rd, device according to claim 2, it is characterised in that
    First determining unit, for the incidence relation according to preset communication scenes information and the subcarrier degree of rarefication coefficient, determine the subcarrier degree of rarefication coefficient, the communication scenes information includes the distance of transmitting terminal and receiving terminal, the speed that receiving terminal is moved relative to transmitting terminal and the load information of the serving cell serviced is provided for the transmitting terminal or the receiving terminal.
    4th, device according to claim 2, it is characterised in that
    First determining unit, for the device type according to transmitting terminal, it is determined that compromise balance weight coefficient, the compromise balance weight coefficient is used for the significance level for reflecting Energy Efficiency Ratio；The subcarrier degree of rarefication coefficient is determined according to efficiency function, the efficiency function is the compromise optimization object function of spectrum efficiency and Energy Efficiency Ratio, when the efficiency function reaches maximum, the degree of rarefication coefficient of corresponding subcarrier is the subcarrier degree of rarefication coefficient.
    5th, according to any described devices of claim 2-4, it is characterised in that described device also includes：3rd determining unit, for the subcarrier degree of rarefication coefficient and the n determined according to first determining unit, determines the bit number of the sub-carrier positions information of the m subcarrier and the bit number k of modulation intelligence2; Obtaining unit, for the described 1 and k determined according to the 3rd determining unit2, bit map is carried out according to preset mapped mode, the mapped bits collection of sub-carrier positions information and the mapped bits collection of modulation intelligence is obtained.
    6th, device according to claim 5, it is characterised in that
    The modulating unit, the mapped bits collection of the modulation intelligence for the obtaining unit to be obtained is modulated to m modulation symbol, just it is blunt according to the obtaining unit obtain the sub-carrier positions information mapped bits collection, determine the numbering of the m subcarrier, the m modulation symbol is mapped on the corresponding m subcarrier of the numbering, one in the m modulation symbol is mapped on each subcarrier in the m subcarrier.
    7th, device according to claim 6, it is characterised in that
    The modulating unit, for the just blunt mapped bits collection according to the sub-carrier positions information, the numbering of the m subcarrier is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
    8th, the device that a kind of signal is received, it is characterised in that including：
    Receiving unit, for receiving the modulated signal of carrying on sub-carriers；
    Determining unit, for from n subcarrier on transmission channel, it is determined that carrying m subcarrier of the modulated signal that the receiving unit is received, the m to be more than or equal to 1, and the n is more than the m;Demodulating unit, for demodulating the modulated signal from the m subcarrier that the determining unit is determined, obtains the data of transmitting terminal transmission.
    9th, device according to claim 8, it is characterised in that described device also includes：Acquiring unit, the acquiring unit, for obtaining subcarrier degree of rarefication coefficient；
    The determining unit, for the subcarrier degree of rarefication coefficient obtained according to the acquiring unit, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal.
    10th, device according to claim 9, it is characterised in that
    The acquiring unit, for going out the m by sub-carrier power blind check, according to the m and n, determines the subcarrier degree of rarefication coefficient.
    11st, device according to claim 9, it is characterised in that
    The acquiring unit, for the subcarrier degree of rarefication coefficient sent by DCCH or higher layer message receiving end/sending end. 12nd, according to any described devices of claim 8-11, it is characterised in that
    The determining unit, is additionally operable to by signal detection algorithm, determines the numbering of the m subcarrier；The demodulating unit, for the numbering of the m subcarrier determined according to the determining unit, the modulated signal is demodulated from the m subcarrier of reference numeral, obtains the data of transmitting terminal transmission.
    13rd, device according to claim 12, it is characterised in that
    The determining unit, for the numbering according to the m subcarrier, the mapped bits collection of sub-carrier positions information is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
    14th, device according to claim 13, it is characterised in that
    The demodulating unit, for carrying out frequency domain equalization to the m subcarrier, obtain the modulation symbol after m frequency domain equalization, modulation symbol after the m frequency domain equalization is demodulated, obtain the mapped bits collection of modulation intelligence, by the mapped bits collection of the sub-carrier positions information and the mapped bits collection of the modulation intelligence, the data that the transmitting terminal is sent are polymerized to.
    15th, a kind of method that signal is sent, it is characterised in that including：
    From n subcarrier on transmission channel, the m subcarrier for carrying data to be transmitted is selected, the m is more than or equal to 1, and the n is more than the m;
    The data to be transmitted is modulated into modulated signal, and the modulated signal is mapped on the m subcarrier；
    The modulated signal is sent by the m subcarrier.
    16th, method according to claim 15, it is characterised in that in the n subcarrier from transmission channel, is selected before the m subcarrier for carrying data to be transmitted, methods described also includes：According to the determination information of subcarrier degree of rarefication coefficient, the subcarrier degree of rarefication coefficient is determined, the subcarrier degree of rarefication coefficient is m and n ratio；
    According to the subcarrier degree of rarefication coefficient and the n, the m is determined.
    17th, method according to claim 16, it is characterised in that the determination information according to subcarrier degree of rarefication coefficient, determines the subcarrier degree of rarefication coefficient, including：
    According to preset communication scenes information and the incidence relation of the subcarrier degree of rarefication coefficient, determine the subcarrier degree of rarefication coefficient, the communication scenes information includes the distance of transmitting terminal and receiving terminal, the speed that receiving terminal move relative to transmitting terminal and is that the transmitting terminal or the receiving terminal provide bearing for the serving cell serviced Information carrying ceases.
    18th, method according to claim 16, it is characterised in that the determination information according to subcarrier degree of rarefication coefficient, determines the subcarrier degree of rarefication coefficient, including：
    According to the device type of transmitting terminal, it is determined that compromise balance weight coefficient, the compromise balance weight coefficient is used for the significance level for reflecting Energy Efficiency Ratio；
    The subcarrier degree of rarefication coefficient is determined according to efficiency function, the efficiency function is the compromise optimization object function of spectrum efficiency and Energy Efficiency Ratio, when the efficiency function reaches maximum, the degree of rarefication coefficient of corresponding subcarrier is the subcarrier degree of rarefication coefficient.
    19th, according to any described methods of right 16-18, it is characterised in that it is described the data to be transmitted is modulated on the m subcarrier before, methods described also includes：
    According to the subcarrier degree of rarefication coefficient and the n, the bit number of the sub-carrier positions information of the m subcarrier and the bit number k of modulation intelligence are determined2;
    According to the k o k2, bit map is carried out according to preset mapped mode, the mapped bits collection of sub-carrier positions information and the mapped bits collection of modulation intelligence is obtained.
    20th, method according to claim 19, it is characterised in that described that the data to be transmitted is modulated on the m subcarrier, including：
    The mapped bits collection of the modulation intelligence is modulated on m modulation symbol；
    Just the blunt mapped bits collection according to the sub-carrier positions information, determines the numbering of the m subcarrier；The m modulation symbol is mapped on the corresponding m subcarrier of the numbering, one in the m modulation symbol is mapped on each subcarrier in the m subcarrier.
    21st, method according to claim 20, it is characterised in that the mapped bits collection according to the sub-carrier positions information, determines the numbering of the m subcarrier, including：
    According to the mapped bits collection of the sub-carrier positions information, the numbering of the m subcarrier is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
    22nd, a kind of method that signal is received, it is characterised in that including：
    Receive the modulated signal of carrying on sub-carriers；
    From n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal, the m is more than or equal to 1, and the n is more than the m; The modulated signal is demodulated from the m subcarrier, the data of transmitting terminal transmission are obtained.
    23rd, method according to claim 22, it is characterised in that in the n subcarrier from transmission channel, it is determined that before m subcarrier for carrying modulated signal, methods described also includes：Obtain subcarrier degree of rarefication coefficient；
    In the n subcarrier from transmission channel, it is determined that m subcarrier of modulated signal is carried, including：
    According to the subcarrier degree of rarefication coefficient, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal.
    24th, method according to claim 23, it is characterised in that the acquisition subcarrier degree of rarefication coefficient, including：
    The m is gone out by sub-carrier power blind check, according to the m and n, the subcarrier degree of rarefication coefficient is determined.
    25th, method according to claim 23, it is characterised in that the acquisition subcarrier degree of rarefication coefficient, including：
    The subcarrier degree of rarefication coefficient sent by DCCH or higher layer message receiving end/sending end.
    26th, according to any described methods of claim 22-25, it is characterised in that it is described demodulate the data from the m subcarrier before, methods described also includes：
    By signal detection algorithm, the numbering of the m subcarrier is determined；
    It is described to demodulate the modulated signal from the m subcarrier, the data of transmitting terminal transmission are obtained, including：
    According to the numbering of the m subcarrier, the modulated signal is demodulated from the m subcarrier of reference numeral, the data of transmitting terminal transmission are obtained.
    27th, method according to claim 26, it is characterised in that described by signal detection algorithm, after the numbering for determining the m subcarrier, methods described also includes：
    According to the numbering of the m subcarrier, the mapped bits collection of sub-carrier positions information is determined from preset subcarrier maps table, the subcarrier maps table is used for the mapped bits collection association corresponding with the numbering of subcarrier for reflecting the sub-carrier positions information.
    28th, method according to claim 27, it is characterised in that described to be carried according to described m son The numbering of ripple, the modulated signal is demodulated from the m subcarrier of reference numeral, obtains the data of transmitting terminal transmission, including：
    Frequency domain equalization is carried out to the m subcarrier, the modulation symbol after m frequency domain equalization is obtained；Modulation symbol after the m frequency domain equalization is demodulated, the mapped bits of modulation intelligence is obtained by the mapped bits collection of the sub-carrier positions information and the mapped bits collection of the modulation intelligence, is polymerized to the data that the transmitting terminal is sent.
    29th, a kind of system of signal transmission, it is characterised in that including：The device that the device and signal that signal is sent are received,
    The device that the signal is sent, for from n subcarrier on transmission channel, select the m subcarrier for carrying data to be transmitted, the m is more than or equal to 1, the n is more than the m, the data to be transmitted is modulated into modulated signal, and the modulated signal is mapped on the m subcarrier.The modulated signal is sent by the m subcarrier；
    The device that the signal is received, for receiving the modulated signal of carrying on sub-carriers, from n subcarrier on transmission channel, it is determined that carrying m subcarrier of modulated signal, the m is more than or equal to 1, the n is more than the m, and the modulated signal is demodulated from the m subcarrier, obtains the data of transmitting terminal transmission.
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