CN101043491B - Part transmission sequence process and its apparatus - Google Patents
Part transmission sequence process and its apparatus Download PDFInfo
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- CN101043491B CN101043491B CN 200610064985 CN200610064985A CN101043491B CN 101043491 B CN101043491 B CN 101043491B CN 200610064985 CN200610064985 CN 200610064985 CN 200610064985 A CN200610064985 A CN 200610064985A CN 101043491 B CN101043491 B CN 101043491B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L27/26—Systems using multi-frequency codes
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- H04L27/2614—Peak power aspects
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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Abstract
The disclosed selective mapping method comprises: the transmission end takes serial-parallel conversion to the input signal sequence, multiplies the parallel signal with one corresponding sequence element in a fixed sequence, combines the result and the relative information of the sequence element, and takes inverse FFT to the combined result; then, the transmission end calculates the peak power rate and mean power rate respectively, and selects the parallel signal with the least rate between peak and mean power for transmission. This invention can improve the PARR performance for OFDM signalindeed.
Description
Technical field
The present invention relates to the technical field in OFDM (OFDM) mobile communication system ofdm signal improved, especially relate to a kind of selectivity mapping method and device thereof and part transmission sequence method and device thereof.
Background technology
Because OFDM (OFDM, Orthogonal Frequency Division Multiplexing) system has well anti-many through ability, therefore in mobile communication system, obtained using widely.But because ofdm signal is formed by stacking by many waveform signals, so the peak power and the average power ratio (PAPR of its signal, Peak-to-Average Power Ratio) will be very big, and these characteristics that ofdm signal had just require the power amplifier of the transmitter in the mobile communication system to have the very high linearity, thereby will increase the equipment cost of transmitter.
In order in the OFDM mobile communication system, to avoid this problem of above-mentioned appearance, industry has proposed two kinds of solutions at present: a kind of is the selectivity mapping method, another kind is the part transmission sequence method, and these two kinds of solutions can make the signal PAPR performance in the OFDM mobile communication system obtain very big improvement to a certain extent.To briefly introduce the main implementation procedure of these two kinds of solutions below:
Please refer to Fig. 1, this figure is the main implementation procedure schematic diagram that the application choice mapping method is handled signal in the prior art, and its main implementation procedure is as follows:
1) transmitting terminal carries out the burst that obtains behind the serial to parallel conversion with input signal, with the fixed sequence program { s that is made up of M different element values
1, s
2..., s
MMultiply each other respectively, thereby obtain M sequence as a result;
2) respectively to each as a result sequence carry out reverse fast fourier transform (IFFT, Inverse FastFourier Transformation), and then obtain M IFFT transformation results;
3) respectively above-mentioned M IFFT transformation results carried out the PAPR value and calculate, and the result who therefrom selects one of them PAPR value minimum sends.
As in above-mentioned Fig. 1, after supposing that transmitting terminal carries out the serial to parallel conversion processing to input signal, the length of each parallel signal is N, is respectively that the parallel signal of N multiplies each other with the fixed sequence program that M the element that is N formed respectively then with each length by same length, thereby obtains M sequence as a result.Wherein be sequence dot product, i.e. output sequence { z here
1, z
2..., z
N}={ x
1y
1, x
2y
2..., x
Ny
N, { x in the formula
1, x
2..., x
NAnd { y
1, y
2..., y
NThe expression list entries.Follow-uply respectively each multiplied result sequence is carried out the IFFT conversion process, obtain M IFFT conversion output sequence, this M IFFT conversion output sequence carried out PAPR respectively to be calculated, the PAPR result of calculation value of all M IFFT conversion output sequences relatively at last, and therefrom select an output sequence with minimum PAPR value and send.
Please refer to Fig. 2, this figure is that applying portion sends the main implementation procedure schematic diagram that sequence method is handled signal in the prior art, and its main implementation procedure is as follows:
1) transmitting terminal is handled whole input signal sequence and is divided into M sub-piece based on serial to parallel conversion;
2) respectively each height piece is carried out the IFFT conversion, thereby obtain M corresponding IFFT conversion output sequence;
3) the variable v of one group of optimum of searching
1, v
2..., v
M, v here
kBe complex variable, make this group variable v
1, v
2..., v
MThe sequence results that is weighted after the processing with each IFFT transform sequence result reaches minimum PAPR value, then the sequence results after the weighted is sent.
As in above-mentioned Fig. 2, transmitting terminal is gone here and there input signal earlier and is changed and be divided into M sub-piece, as supposes that whole signal total length is N, and the length of each sub-piece is N/M so; Respectively each height piece is carried out the IFFT conversion process, obtain M corresponding IFFT output sequence as a result, seek the variable v of one group of optimum at last
1, v
2..., v
M(v here
kBe complex variable), make M IFFT export as a result sequence respectively with this group variable v
1, v
2..., v
MSequence results after the weighted reaches minimum PAPR value, the sequence results after the weighted is sent again.
Can will send the PAPR value reduction of burst from the visible transmitting terminal of realization principle of above-mentioned selectivity mapping method and part transmission sequence method, thereby reduce linearity requirement the transmitter intermediate power amplifier.But the receiver that adopts this dual mode requirement receiving terminal must be understood transmitting terminal and ask for the employed PAPR relevant parameter of minimum PAPR value for sending signal, the data that the correct receiving end/sending end of ability sends.For example, for the selectivity mapping method, { the s that forms by M element that receiver must know that transmitting terminal adopts
1, s
2..., s
MThe sequence value condition; And for the part transmission sequence method, which group variable v that receiver must be known the transmitting terminal employing is
1, v
2..., v
MBe weighted calculating; So just requiring receiver can understand transmitting terminal is to ask for to send the PAPR relevant parameter that burst PAPR minimum value is adopted, but when these two kinds of methods of enforcement, do not realize in the prior art at present this function therefore making these two kinds of methods in the OFDM mobile communication system, implement to become nonsensical for the PAPR performance of improving ofdm signal.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of selectivity mapping method and device and a kind of part transmission sequence method and device thereof, with the PAPR performance of improving ofdm signal that can be real in the OFDM mobile communication system.
For addressing the above problem, the technical scheme that the present invention proposes is as follows:
A kind of part transmission sequence method comprises step:
Transmitting terminal carries out input signal sequence serial to parallel conversion and is divided into a plurality of sub-pieces;
Respectively each the sub-piece that marks off is carried out reverse fast fourier transform;
Seek one group of variable that satisfies following condition:
Should organize variable and carry out reverse fast fourier transform; And
With the reverse fast fourier transform result of each sub-piece of marking off respectively with this group variable in corresponding sequential element be weighted processing;
Output after the reverse fast fourier transform output result who requires this group variable and described each sub-piece weighted is peak power and the average power ratio of sum with minimum as a result;
Transmitting terminal will based on the output of this group variable that searches out as a result sum send.
Preferably, described method also comprises step:
Determine corresponding pilot signal sequence; And
The pilot signal sequence of determining is carried out reverse fast fourier transform;
One group of variable of described searching satisfies: the reverse fast fourier transform output of the reverse fast fourier transform output result of this group variable, the output result after each sub-piece weighted and described pilot signal sequence sum as a result has minimum peak power and average power ratio.
A kind of part transmission sequence device comprises:
Divide module unit, be used for transmitting terminal input signal sequence is carried out serial to parallel conversion and is divided into a plurality of sub-pieces;
The first reverse fast Fourier transform unit, each the sub-piece that is used for respectively described piecemeal dividing elements being gone out carries out reverse fast fourier transform;
Variable is sought the unit, is used to seek one group of variable that satisfies following condition:
Should organize variable and carry out reverse fast fourier transform; And
With the reverse fast fourier transform result of each sub-piece of marking off respectively with this group variable in corresponding sequential element be weighted processing;
Output after the reverse fast fourier transform output result who requires this group variable and described each sub-piece weighted is peak power and the average power ratio of sum with minimum as a result;
Signal transmitting unit, be used for output that transmitting terminal will seek this group variable that the unit searches out based on described variable as a result sum send.
Preferably, described device also comprises:
The pilot signal determining unit is used for determining the pilot signal sequence of a correspondence;
The second reverse fast Fourier transform unit is used for the pilot signal sequence that described pilot signal determining unit is determined is carried out reverse fast fourier transform;
Described variable is sought the variable of seeking the unit and is satisfied:
The reverse fast fourier transform output of the reverse fast fourier transform output result of this group variable, the output result after each sub-piece weighted and described pilot signal sequence sum as a result has minimum peak power and average power ratio.
Preferably, described variable is sought the unit and is specifically comprised:
The variable determining unit is used for determining one group of temporary variable;
The 3rd reverse fast Fourier transform unit is used for the temporary variable that described variable determining unit is determined is carried out reverse fast fourier transform;
Weighting processing unit is used for the corresponding sequential element that the described first reverse fast Fourier transform unit is carried out the temporary variable that the transformation results after reverse fast fourier transform is handled determines with described variable determining unit respectively to each sub-piece is weighted processing;
First addition unit is used for that the described the 3rd reverse fast Fourier transform unit is carried out the transformation results of reverse fast fourier transform and described weighting processing unit to temporary variable and each sub-piece is carried out output result after weighted carries out addition and handle;
Judge notification unit, being used at the peak power of the addition result of described first addition unit and average power ratio is not hour to notify described variable determining unit to redefine one group of temporary variable.
Preferably, described variable is sought the unit and is specifically comprised:
The variable determining unit is used for determining one group of temporary variable;
The 3rd reverse fast Fourier transform unit is used for the temporary variable that described variable determining unit is determined is carried out reverse fast fourier transform;
Weighting processing unit is used for the corresponding sequential element that the described first reverse fast Fourier transform unit is carried out the temporary variable that the transformation results after reverse fast fourier transform is handled determines with described variable determining unit respectively to each sub-piece is weighted processing;
Second addition unit is used for that the described the 3rd reverse fast Fourier transform unit is carried out the transformation results of reverse fast fourier transform, described weighting processing unit to temporary variable and each sub-piece is carried out transformation results that output result after weighted and the second reverse fast Fourier transform unit carry out reverse fast fourier transform to pilot signal sequence carries out addition and handle;
Judge notification unit, being used at the peak power of the addition result of described second addition unit and average power ratio is not hour to notify described variable determining unit to redefine one group of variable.
The beneficial effect that the present invention can reach is as follows:
When the present invention program passes through to implement selectivity mapping method or part transmission sequence method in the OFDM mobile communication system, transmitting terminal will also send to receiving terminal for asking for the employed PAPR relevant parameter of the minimum PAPR value of ofdm signal, and consider that transmitting terminal sends these PAPR relevant parameters to ofdm signal PAPR Effect on Performance, thereby make receiving terminal to carry out correct reception and demodulation thereof, thereby make and in the OFDM mobile communication system, implement the selectivity mapping method or the part transmission sequence method becomes really meaningful for the PAPR performance of improving ofdm signal according to the ofdm signal that the PAPR relevant parameter that transmitting terminal is sent is sent transmitting terminal.
Description of drawings
The main implementation procedure schematic diagram that Fig. 1 handles signal for application choice mapping method in the prior art;
Fig. 2 sends the main implementation procedure schematic diagram that sequence method is handled signal for applying portion in the prior art;
Fig. 3 is the main realization principle flow chart of selectivity mapping method of the present invention;
Fig. 4 implements the enforcement processing procedure schematic diagram of selectivity mapping method in the OFDM mobile communication system for the principle of using selectivity mapping method of the present invention;
Fig. 5 is the main composition structured flowchart of selectivity mapping device of the present invention;
Fig. 6 forms structured flowchart for selectivity mapping device of the present invention for the embodiment that improves the receiving terminal error performance;
Fig. 7 is the main realization principle flow chart of part transmission sequence method of the present invention;
Fig. 8 implements the enforcement processing procedure schematic diagram of part transmission sequence method in the OFDM mobile communication system for the principle of using part transmission sequence method of the present invention;
Fig. 9 is the main composition structured flowchart of part transmission sequence device of the present invention;
Figure 10 seeks the main composition structured flowchart of unit for the variable in the part transmission sequence device of mainly forming structure based on Fig. 9;
Figure 11 forms structured flowchart for part transmission sequence device of the present invention for the embodiment that improves the receiving terminal error performance;
Figure 12 seeks the main composition structured flowchart of unit for the variable in the part transmission sequence device of mainly forming structure based on Figure 11.
Embodiment
Technical solution of the present invention is primarily aimed at when implementing selectivity mapping method and part transmission sequence method in the prior art in the OFDM mobile communication system, receiver must know that transmitting terminal is to ask for the PAPR relevant parameter that the PAPR minimum value of ofdm signal adopts, the signal data that the correct receiving demodulation transmitting terminal of ability sends, thereby make selectivity mapping method and the enforcement of part transmission sequence method in the OFDM mobile communication system can really improve the PAPR performance of ofdm signal, therefore proposed in the implementation process of selectivity mapping method and part transmission sequence method, to make transmitting terminal increase the transfer function that sends the PAPR relevant parameter, considered that simultaneously transmitting terminal sends these PAPR relevant parameters to ofdm signal PAPR Effect on Performance.
Be explained in detail to the present invention program's main realization principle, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
Please refer to Fig. 3, this figure is the main realization principle flow chart of selectivity mapping method of the present invention, and its main implementation procedure is as follows:
Step S10, transmitting terminal carry out serial to parallel conversion with input signal sequence to be handled;
Step S20, carry out the processing of following steps S30, step S40 and step S50 at the parallel signal sequences behind each serial to parallel conversion:
Step S30 at first carries out multiplication mutually with this parallel signal with a corresponding sequential element in certain fixed sequence program group;
Step S40, the relevant information with above-mentioned multiplied result and this correspondence sequential element merges processing then, wherein the sequential element relevant information here can but be not limited to and be used for indicating the pointer information of sequential element at this fixed sequence program group particular location; The merging is here handled the relevant information that promptly refers to multiplied result and this correspondence sequential element and is carried on a processing procedure on the subcarrier by suitable the placement successively;
Step S50, the burst after at last above-mentioned merging being handled is carried out the IFFT conversion process;
Step S60, transmitting terminal carry out PAPR respectively to the IFFT conversion output result of each parallel signal after above-mentioned steps S30, step S40 and step S50 processing and calculate;
Step S70, transmitting terminal is selected the minimum parallel signal IFFT conversion output result of a PAPR value according to above-mentioned each result of calculation and is sent.
Usually in the OFDM mobile communication system, in order to obtain better receiver error performance, system side makes receiver can carry out coherent demodulation based on insert pilot signal in service signal usually, thereby obtains better receiver error performance.Therefore consider too in the methods of the invention that pilot signal is to receiving the influence of chance error code performance, wherein and then it is also conceivable that pilot signal and other coherent signals to receiving the influence of chance error code performance, promptly pilot signal can be expanded into: pilot signal+other useful signals.
Like this in above-mentioned steps S40, the relevant information of multiplied result and corresponding sequential element (can for being used in reference to the pointer information of bright sequential element particular location in this fixed sequence program group) is being merged when handling, also to consider simultaneously the pilot signal sequence of relative set is merged processing too, perhaps with the pilot signal of relative set and other coherent signals and multiplied result, and the relevant information of corresponding sequential element (can for being used in reference to the pointer information of bright sequential element particular location in this fixed sequence program group) merges processing, to reduce the reception error rate of receiver.
Please refer to Fig. 4, this figure is the principle of application selectivity mapping method of the present invention is implemented the selectivity mapping method in the OFDM mobile communication system an enforcement processing procedure schematic diagram, and its specific implementation process is as follows:
1) whole OFDM subcarrier is divided into three parts:
Data subcarrier is used to carry the burst of transmission;
Pilot sub-carrier is used to carry pilot signal sequence; With
The PAPR subcarrier is used to carry the PAPR relevant parameter;
2) input signal sequence of data subcarrier carrying is carried out serial to parallel conversion and handles, each parallel signal sequences after then serial to parallel conversion being handled respectively with the fixed sequence program { s that forms by M different sequential elements
1, s
2..., s
MIn a corresponding sequential element multiply each other, thereby obtain M corresponding multiplied result sequence { w
1, w
2..., w
M;
3) with above-mentioned 2) in each multiplied result sequence merge processing with the PAPR subcarrier that is used for carrying the pilot sub-carrier of pilot signal and is used to carry the corresponding sequential element of fixed sequence program, carry the pointer information s of corresponding sequential element in fixed sequence program here in the PAPR subcarrier
k
4) subcarrier that respectively above-mentioned each being used to after merge handling is carried the coherent signal sequence carries out the IFFT conversion process, exports the result thereby obtain M corresponding IFFT conversion;
5) respectively this M IFFT conversion output result is carried out the computing of PAPR value successively, and therefrom select an IFFT conversion with minimum PAPR value and export the result and send.
By the entire process process of above-mentioned Fig. 4 as can be seen, needing at first become a plurality of parallel signal sequences with the burst of input by string and conversion process, and each parallel signal sequences length after suppose to change is N; Fixed sequence program { the s that each parallel signal sequences and the sequential element that is N by M length are formed then
1, s
2..., s
MMultiply each other, thereby obtain M corresponding multiplied result sequence { w
1, w
2..., w
M.The length of supposing parallel signal sequences is N
d, each s so
k, and each w
kLength be N
dSuppose that the pilot sub-carrier length that is used to carry pilot signal sequence is N
p, be used for carrying the PAPR relevant information and (be here and be used to indicate the pointer information s of correlated series element at the fixed sequence program particular location
k) PAPR subcarrier length be N
PAPR, the burst total length that so multiplied result, pilot sub-carrier and the PAPR subcarrier of corresponding sequential element in parallel signal and the fixed sequence program is merged after the processing is N=N
d+ N
p+ N
PAPRAt last each subcarrier that merges after handling is carried out the IFFT conversion process, thereby correspondence obtains M IFFT conversion output sequence as a result, and to each IFFT conversion output as a result sequence carry out PAPR respectively and calculate, and therefrom select an IFFT conversion with minimum PAPR value and export as a result that sequence sends.
Selectivity mapping method corresponding to the above-mentioned proposition of the present invention, the present invention has also proposed a kind of selectivity mapping device here, please refer to Fig. 5, this figure is the main composition structured flowchart of selectivity mapping device of the present invention, it mainly comprises serial to parallel conversion unit 10, multiplication unit 20, first merge cells 30, IFFT converter unit 40 and selected cell 50, and wherein the concrete effect of each component units is as follows:
Serial to parallel conversion unit 10 is used for transmitting terminal input signal sequence is carried out the serial to parallel conversion processing;
First merge cells 30 is used for the multiplied result of above-mentioned multiplication unit 20 and the relevant information of corresponding sequential element are merged processing; Wherein the sequential element relevant information here can but be not limited to and be used for indicating the pointer information of sequential element at this fixed sequence program group particular location; The merging is here handled the relevant information that promptly refers to multiplied result and this correspondence sequential element and is carried on a processing procedure on the subcarrier by suitable the placement successively;
Here the same reception error rate of considering to improve receiver is inserted corresponding pilot signal sequence in the transmission burst of transmitting terminal, since improve the reception error rate of receiver.Please refer to Fig. 6, this figure is that selectivity mapping device of the present invention is formed structured flowchart for the embodiment that improves the receiving terminal error performance, it is on the main composition architecture basics of above-mentioned Fig. 5, also and then comprise one second merge cells 60, be used for that the pilot signal sequence of burst after the 30 merging processing of above-mentioned first merge cells and relative set is carried out merging and handle, soon the pilot signal sequence of the merging result of first merge cells 30 and relative set is carried on the subcarrier by suitable the placement successively.Selected cell 50 among above-mentioned in addition Fig. 5 specifically comprises power ratio computation subunit 510 and chooser unit 520, and the main effect of these two unit is as follows:
Power ratio computation subunit 510 is used for each the IFFT conversion output result of transmitting terminal after to above-mentioned IFFT converter unit 40 conversion process and carries out the PAPR computing respectively;
Please refer to Fig. 7, this figure is the main realization principle flow chart of part transmission sequence method of the present invention, and its main implementation procedure is as follows:
Step S100, transmitting terminal carries out whole input signal sequence serial to parallel conversion and is divided into a plurality of sub-pieces;
Step S200, transmitting terminal carry out the IFFT conversion process to the sub-piece of above-mentioned each that marks off respectively;
Step S300, seek one group of variable that satisfies following step S400～S600 processing procedure condition:
Step S400 carries out the IFFT conversion process to this group variable;
Step S500, with the IFFT transformation results sequence of the sub-piece of above-mentioned each that marks off respectively with this group variable in corresponding sequential element be weighted processing;
Step S600, the IFFT conversion output that requires this group variable output after sequence and each the sub-piece weighted as a result sequence sum as a result has the PAPR value of minimum;
Step S700, transmitting terminal will based on above-mentioned this group variable that searches out handle the output that obtains as a result sum send.
Usually in the OFDM mobile communication system, in order to obtain better receiver error performance, system side makes receiver can carry out coherent demodulation based on insert pilot signal in service signal usually, thereby obtains better receiver error performance in same consideration.Therefore consider too in part transmission sequence method of the present invention that pilot signal is to receiving the influence of chance error code performance, wherein and then it is also conceivable that pilot signal and other coherent signals to receiving the influence of chance error code performance, promptly pilot signal can be expanded into: pilot signal+other useful signals.
In above-mentioned processing procedure, can also and then pre-determine the pilot signal sequence of a correspondence like this, and this pilot signal sequence carried out the IFFT conversion process, require system side to seek one group of variable then and satisfy following condition:
The IFFT conversion output of the IFFT conversion output result of this group variable, the output result after each sub-piece weighted and corresponding pilot signal sequence sum as a result has minimum PAPR value;
Last transmitting terminal will send handling the output result who obtains based on this group variable that searches out, thereby guarantees that the ofdm signal that sends has minimum PAPR value.
Please refer to Fig. 8, this figure is the principle of application part transmission sequence method of the present invention is implemented the part transmission sequence method in the OFDM mobile communication system an enforcement processing procedure schematic diagram, and its specific implementation process is as follows:
1) transmitting terminal is divided into three parts with whole OFDM subcarrier:
Data subcarrier is used to carry the burst of transmission;
Pilot sub-carrier is used to carry pilot signal sequence; With
The PAPR subcarrier is used to carry the PAPR relevant parameter;
2) transmitting terminal will be carried on whole input signal sequence in the data subcarrier and be divided into M sub-piece;
3) respectively each is divided sub-piece and carry out the IFFT conversion process, thereby obtain M corresponding IFFT conversion output sequence as a result;
4) pilot sub-carrier that carries corresponding pilot signal sequence is carried out the IFFT conversion process;
5) to interim each group variable v that determines
1, v
2..., v
M(v here
kBe a complex variable), it is carried and be modulated in the PAPR subcarrier, and the PAPR subcarrier of this generation is carried out the IFFT conversion process;
At first utilize temporary variable group v
1, v
2..., v
MTo above-mentioned 3) in M IFFT conversion output as a result sequence carry out weighted, then to above-mentioned M IFFT conversion output as a result sequence as a result, the IFFT conversion output result of pilot sub-carrier and the IFFT conversion output result of PAPR subcarrier after the weighted carry out the addition processing;
6) based on above-mentioned 5) in processing procedure, search out one group of best variable v
1, v
2..., v
MMake output results added sum have minimum PAPR value;
7) transmitting terminal will have a minimum PAPR value output as a result sum send.
By the processing procedure of above-mentioned Fig. 8 as can be seen, transmitting terminal is at first gone here and there the burst of whole input and is changed and be divided into M sub-piece, as supposes that whole burst total length is N
d, the length of each the height piece that marks off so is N
d/ M; Thereby respectively each the sub-piece that marks off is carried out the IFFT conversion process and obtain M corresponding IFFT output sequence as a result; Pilot sub-carrier to the carrying pilot signal is also carried out the IFFT conversion process, is N thereby obtain a length
pOutput sequence as a result; To interim each group variable v that determines
1, v
2..., v
M(v here
kBe a complex variable), it is carried and be modulated in the PAPR subcarrier, equally the PAPR subcarrier of this new generation is also carried out the IFFT conversion process.Utilize the interim v that determines earlier
1, v
2..., v
MSet of variables is exported as a result to the IFFT conversion of an above-mentioned M parallel signal sequences, and sequence is weighted processing, IFFT conversion output result and PAPR subcarrier IFFT conversion output result to the output result after M the weighted, pilot sub-carrier carries out the addition processing then, searches out one group of best variable v at last
1, v
2..., v
MMake above-mentioned addition result sum can reach minimum PAPR value, and the output that will have a PAPR minimum value as a result sum send.
Part transmission sequence method corresponding to the above-mentioned proposition of the present invention, the present invention goes back correspondence here and has proposed a kind of part transmission sequence device, please refer to Fig. 9, this figure is the main composition structured flowchart of part transmission sequence device of the present invention, it mainly comprises branch module unit 100, an IFFT converter unit 200, variable searching unit 300 and signal transmitting unit 400, and wherein the main effect of each component units is as follows:
The one IFFT converter unit 200 is mainly used in respectively each sub-piece that above-mentioned minute module unit 100 marked off and carries out the IFFT conversion process;
Variable is sought unit 300, is mainly used in to seek one group of set of variables that satisfies following condition:
Should organize variable and carry out the IFFT conversion process;
And with the IFFT transformation results of the sub-piece of above-mentioned each that marks off respectively with this group variable in corresponding sequential element be weighted processing;
Output after the IFFT conversion output result who requires this group variable and above-mentioned each sub-piece weighted sum as a result has the PAPR value of minimum;
Signal transmitting unit 400, be mainly used in transmitting terminal will based on above-mentioned variable seek output that one group of optimization variables that unit 300 searches out handles to obtain as a result sum send, have minimum PAPR value to guarantee the ofdm signal that transmitting terminal sends.
As shown in figure 10, seek the main composition structured flowchart of unit for the variable in the part transmission sequence device of mainly forming structure based on Fig. 9, it mainly comprises variable determining unit 3010, the 3rd IFFT converter unit 3020, weighting processing unit 3030, first addition unit 3040 and judges notification unit 3050 that wherein the main effect of each part is as follows:
Variable determining unit 3010 is used for determining one group of temporary variable;
The 3rd IFFT converter unit 3020 is used for the temporary variable that above-mentioned variable determining unit 3010 is determined is carried out the IFFT conversion process;
Here the same reception error rate of considering to improve receiver is inserted corresponding pilot signal sequence in the transmission burst of transmitting terminal, since improve the reception error rate of receiver.Please refer to Figure 11, this figure is that part transmission sequence device of the present invention is formed structured flowchart for the embodiment that improves the receiving terminal error performance, its on the main composition architecture basics of above-mentioned Fig. 9, also and then comprise pilot signal determining unit 500, the 2nd IFFT converter unit 600, wherein:
Pilot signal determining unit 500 is mainly used in the pilot signal sequence that pre-determines a correspondence;
The 2nd IFFT converter unit 600 is mainly used in the pilot signal sequence that above-mentioned pilot signal determining unit 500 is determined and carries out the IFFT conversion process;
Above-mentioned like this variable is sought the variable of seeking unit 300 and should be satisfied:
The IFFT conversion output of the IFFT conversion output result of this group variable, the output result after each sub-piece weighted and pilot signal sequence sum as a result has minimum PAPR value.
As shown in figure 12, seek the main composition structured flowchart of unit for the variable in the part transmission sequence device of mainly forming structure based on Figure 11, it mainly comprises variable determining unit 3010, the 3rd IFFT converter unit 3020, weighting processing unit 3030, second addition unit 3060 and judges notification unit 3050 that wherein the main effect of each part is as follows:
Variable determining unit 3010 is used for determining one group of temporary variable;
The 3rd IFFT converter unit 3020 is used for the temporary variable that above-mentioned variable determining unit 3010 is determined is carried out the IFFT conversion process;
Second addition unit 3060, the transformation results, weighting processing unit 3030 that is used for the 3020 pairs of temporary variables of above-mentioned the 3rd IFFT converter unit are carried out the IFFT conversion carried out transformation results that output result after weighted and 600 pairs of pilot signal sequences of the 2nd IFFT converter unit carry out the IFFT conversion to each sub-piece and carried out addition and handle;
As fully visible, the present invention program makes selectivity mapping mode and part transmission sequence mode implement to become meaningful for the PAPR performance of improving ofdm signal in the OFDM mobile communication system, promptly uses the selectivity mapping mode of the present invention program's proposition and the PAPR performance that the part transmission sequence mode can be improved ofdm signal comparatively completely in the OFDM mobile communication system.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (6)
1. a part transmission sequence method is characterized in that, comprises step:
Transmitting terminal carries out input signal sequence serial to parallel conversion and is divided into a plurality of sub-pieces;
Respectively each the sub-piece that marks off is carried out reverse fast fourier transform;
Seek one group of variable that satisfies following condition:
Should organize variable and carry out reverse fast fourier transform; And
With the reverse fast fourier transform result of each sub-piece of marking off respectively with this group variable in corresponding sequential element be weighted processing;
Output after the reverse fast fourier transform output result who requires this group variable and described each sub-piece weighted is peak power and the average power ratio of sum with minimum as a result;
Transmitting terminal will based on the output of this group variable that searches out as a result sum send.
2. the method for claim 1 is characterized in that, also comprises step:
Determine corresponding pilot signal sequence; And
The pilot signal sequence of determining is carried out reverse fast fourier transform;
One group of variable of described searching satisfies: the reverse fast fourier transform output of the reverse fast fourier transform output result of this group variable, the output result after each sub-piece weighted and described pilot signal sequence sum as a result has minimum peak power and average power ratio.
3. a part transmission sequence device is characterized in that, comprising:
Divide module unit, be used for transmitting terminal input signal sequence is carried out serial to parallel conversion and is divided into a plurality of sub-pieces;
The first reverse fast Fourier transform unit, each the sub-piece that is used for respectively described piecemeal dividing elements being gone out carries out reverse fast fourier transform;
Variable is sought the unit, is used to seek one group of variable that satisfies following condition:
Should organize variable and carry out reverse fast fourier transform; And
With the reverse fast fourier transform result of each sub-piece of marking off respectively with this group variable in corresponding sequential element be weighted processing;
Output after the reverse fast fourier transform output result who requires this group variable and described each sub-piece weighted is peak power and the average power ratio of sum with minimum as a result;
Signal transmitting unit, be used for output that transmitting terminal will seek this group variable that the unit searches out based on described variable as a result sum send.
4. device as claimed in claim 3 is characterized in that, also comprises:
The pilot signal determining unit is used for determining the pilot signal sequence of a correspondence;
The second reverse fast Fourier transform unit is used for the pilot signal sequence that described pilot signal determining unit is determined is carried out reverse fast fourier transform;
Described variable is sought the variable of seeking the unit and is satisfied:
The reverse fast fourier transform output of the reverse fast fourier transform output result of this group variable, the output result after each sub-piece weighted and described pilot signal sequence sum as a result has minimum peak power and average power ratio.
5. device as claimed in claim 3 is characterized in that, described variable is sought the unit and specifically comprised:
The variable determining unit is used for determining one group of temporary variable;
The 3rd reverse fast Fourier transform unit is used for the temporary variable that described variable determining unit is determined is carried out reverse fast fourier transform;
Weighting processing unit is used for the corresponding sequential element that the described first reverse fast Fourier transform unit is carried out the temporary variable that the transformation results after reverse fast fourier transform is handled determines with described variable determining unit respectively to each sub-piece is weighted processing;
First addition unit is used for that the described the 3rd reverse fast Fourier transform unit is carried out the transformation results of reverse fast fourier transform and described weighting processing unit to temporary variable and each sub-piece is carried out output result after weighted carries out addition and handle;
Judge notification unit, being used at the peak power of the addition result of described first addition unit and average power ratio is not hour to notify described variable determining unit to redefine one group of temporary variable.
6. device as claimed in claim 4 is characterized in that, described variable is sought the unit and specifically comprised:
The variable determining unit is used for determining one group of temporary variable;
The 3rd reverse fast Fourier transform unit is used for the temporary variable that described variable determining unit is determined is carried out reverse fast fourier transform;
Weighting processing unit is used for the corresponding sequential element that the described first reverse fast Fourier transform unit is carried out the temporary variable that the transformation results after reverse fast fourier transform is handled determines with described variable determining unit respectively to each sub-piece is weighted processing;
Second addition unit is used for that the described the 3rd reverse fast Fourier transform unit is carried out the transformation results of reverse fast fourier transform, described weighting processing unit to temporary variable and each sub-piece is carried out transformation results that output result after weighted and the second reverse fast Fourier transform unit carry out reverse fast fourier transform to pilot signal sequence carries out addition and handle;
Judge notification unit, being used at the peak power of the addition result of described second addition unit and average power ratio is not hour to notify described variable determining unit to redefine one group of variable.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610064985 CN101043491B (en) | 2006-03-20 | 2006-03-20 | Part transmission sequence process and its apparatus |
| PCT/CN2007/000889 WO2007107107A1 (en) | 2006-03-20 | 2007-03-19 | Selective mapping method and apparatus and partial transmitting sequence method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610064985 CN101043491B (en) | 2006-03-20 | 2006-03-20 | Part transmission sequence process and its apparatus |
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| WO (1) | WO2007107107A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101431505B (en) * | 2008-12-03 | 2011-08-31 | 山东大学 | Emission system and method for reducing peak-to-average power ratio of orthogonal frequency division multiplexing system |
| KR101271288B1 (en) | 2011-10-14 | 2013-06-04 | 연세대학교 산학협력단 | Apparatus and method for transmitting data in wireless communication system |
| TWI482467B (en) * | 2013-01-24 | 2015-04-21 | Univ Nat Sun Yat Sen | An apparatus for papr reduction in ofdm system |
| CN106059982A (en) * | 2016-07-07 | 2016-10-26 | 哈尔滨工程大学 | ADO (Asymmetrically Clipped DC Biased Optical)-OFDM (Orthogonal Frequency Division Multiplexing) system PAPR (Peak to Average Power Ratio) inhibition method based on SLM (Selected Mapping) and CT (Companding Transform) |
| WO2021093073A1 (en) * | 2019-12-13 | 2021-05-20 | Zte Corporation | Non-zero insertion based modulation scheme for low peak average power ratio |
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| CN1522511A (en) * | 2002-04-26 | 2004-08-18 | ���ǵ�����ʽ���� | Apparatus and method for transmitting and receiving additional information of partial transmission sequence at orthogonal frequency division multiplexing communication system |
| CN1666452A (en) * | 2002-07-08 | 2005-09-07 | 三星电子株式会社 | Apparatus and method for transmitting and receiving side information about selective mapping in an orthogonal frequency division multiplexing communication system |
| CN1703036A (en) * | 2004-05-25 | 2005-11-30 | 株式会社Ntt都科摩 | Transmitting and receiving apparatus |
| KR20060022579A (en) * | 2004-09-07 | 2006-03-10 | 삼성전자주식회사 | Apparatus and method for reduction of peak to average power ratio in an orthogonal frequency division multiplexing communication system |
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| JP4429795B2 (en) * | 2004-05-06 | 2010-03-10 | 株式会社エヌ・ティ・ティ・ドコモ | Wireless communication system, wireless transmitter and wireless receiver |
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|---|---|---|---|---|
| CN1522511A (en) * | 2002-04-26 | 2004-08-18 | ���ǵ�����ʽ���� | Apparatus and method for transmitting and receiving additional information of partial transmission sequence at orthogonal frequency division multiplexing communication system |
| CN1666452A (en) * | 2002-07-08 | 2005-09-07 | 三星电子株式会社 | Apparatus and method for transmitting and receiving side information about selective mapping in an orthogonal frequency division multiplexing communication system |
| CN1703036A (en) * | 2004-05-25 | 2005-11-30 | 株式会社Ntt都科摩 | Transmitting and receiving apparatus |
| KR20060022579A (en) * | 2004-09-07 | 2006-03-10 | 삼성전자주식회사 | Apparatus and method for reduction of peak to average power ratio in an orthogonal frequency division multiplexing communication system |
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| WO2007107107A1 (en) | 2007-09-27 |
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