CN102377704B - Training sequence symbol insertion method and device as well as communication system - Google Patents
Training sequence symbol insertion method and device as well as communication system Download PDFInfo
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- CN102377704B CN102377704B CN201010268991.3A CN201010268991A CN102377704B CN 102377704 B CN102377704 B CN 102377704B CN 201010268991 A CN201010268991 A CN 201010268991A CN 102377704 B CN102377704 B CN 102377704B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0222—Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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Abstract
The invention relates to the technical field of communication and discloses a training sequence symbol insertion method and device as well as a communication system. The training sequence symbol insertion method comprises the following steps: obtaining the current channel environment, computing a time delay extension under the current channel environment, computing the coherent bandwidth of a channel corresponding to the current channel environment according to the time delay extension; determining an interval bandwidth between training sequence symbols, wherein the interval bandwidth is less than the coherent bandwidth; computing a first number of the required training sequence symbols in a sending unit by using the interval bandwidth and a sending unit bandwidth; adjusting the first number according to the channel estimated loss under the current channel environment to obtain a second number; and inserting the training sequence symbol with the second number into the sending unit. By using the method provided by the invention, the inserted training sequence symbol is more adapted to the current channel environment, and the integral receiving performance is improved.
Description
Technical field
The present invention relates to communication technical field, be specifically related to training sequence symbols insertion method, device and communication system.
Background technology
Along with user is more and more higher to the requirement of communication system, the development of the communication technology is also more and more faster.For example, global system for mobile communications/global system for mobile communications strengthens data transfer rate evolution version wireless access network (GSM/GERAN:Global System for Mobile Communications/GSM EDGE Radio Access Network) nested design wireless traffic and is just experiencing general packet radio service technology (GPRS:General Packet Radio Service), the GPRS (EGPRS:Enhanced GPRS) strengthening, the evolution process in the GPRS stage two (EGPRS2:Enhanced GPRS phase 2) strengthening.The performance boost of Packet data service is mainly the lifting of data throughout.Wherein, GPRS stage two (PCE:Precoded EGPRS2) scheme that existing a kind of EGPRS2 improvement technology is the enhancing of precoding, the transmission flow of this scheme comprises: transmitting element format (Burst formatting), sign map, inverse discrete Fourier transformer inverse-discrete (IDFT), add the steps such as Cyclic Prefix (CP) and transmitted moulding (TX Pulse Shaping), wherein the effect of Burst formatting is to organize effective information data and is the transmission form that ensures other information datas of the correct transmission of effective information.The effective information data here refer to the rear user's of coding business datum, and out of Memory data comprise training sequence or other protected datas etc.In the processing procedure of Burst formatting, need in the effective information data symbol of transmitting element (Burst) and other data symbols, insert training sequence (TS:Training Sequence) symbol.Wherein, Burst is the minimum information unit of carrying out PCE transmission, and its time taking is a definite value T, and occupied bandwidth is a definite bandwidth BW.
In the processing procedure of the Burst of such scheme formatting, only use the TS symbol of fixed qty, under ordinary symbol speed (NSR:Normal Symbol Rate), be for example 26 TS symbols, under high character rate (HSR:Higher Symbol Rate), be 31 TS symbols, and the position of these TS symbols is also fixed, therefore such scheme all can usage quantity and the TS symbol all fixed of position at various application channel circumstance, and along with applying the difference of channel circumstance, corresponding channel characteristics is also different, therefore the TS symbol that usage quantity and position are all fixed can not be applicable to all channel circumstances, can reduce the overall receptivity under some channel circumstance, and, the quantity of TS symbol and position, not only can affect the performance of receiver channel estimating part, also can indirectly have influence on the quantity of protecting symbol in burst, thereby affect overall receptivity.
Summary of the invention
The embodiment of the present invention provides training sequence symbols insertion method, device and communication system, can make the training sequence symbols of inserting be more suitable for current channel circumstance, improves overall receptivity.
One embodiment of the invention provides a kind of training sequence symbols insertion method, comprising:
Obtain current channel circumstance, calculate the time delay expansion under described current channel circumstance, calculate the coherence bandwidth of current channel circumstance respective channels according to described time delay expansion;
Determine the interval bandwidth between training sequence symbols, described interval bandwidth is less than described coherence bandwidth;
Use described in described interval bandwidth and transmitting element bandwidth calculation the first quantity of required training sequence symbols in transmitting element;
According to the channel estimating loss under described current channel circumstance, described the first quantity is adjusted, obtained the second quantity;
The training sequence symbols of described the second quantity is inserted to transmitting element.
Another embodiment of the present invention provides a kind of training sequence symbols insertion apparatus, comprising:
Bandwidth acquiring unit, for obtaining current channel circumstance, calculates the time delay expansion under described current channel circumstance, calculates the coherence bandwidth of current channel circumstance respective channels according to described time delay expansion; Determine the interval bandwidth between training sequence symbols, described interval bandwidth is less than described coherence bandwidth;
Computing unit, for using interval bandwidth that described bandwidth acquiring unit obtains and the first quantity of transmitting element bandwidth calculation training sequence symbols; According to the channel estimating loss under described current channel circumstance, described the first quantity is adjusted, obtained the second quantity;
Plug-in unit, inserts transmitting element for the training sequence symbols of the second quantity that described computing unit is calculated.
Another embodiment of the present invention provides a kind of communication system, comprises the training sequence symbols insertion apparatus that the embodiment of the present invention provides.
The above technical scheme providing from the embodiment of the present invention can be found out, because the embodiment of the present invention can be determined the interval bandwidth between training sequence symbols according to current channel circumstance, and then determine the second quantity of the needed TS symbol of transmitting element under current channel circumstance, thereby only the TS symbol of needed the second quantity under current channel circumstance need to be inserted into transmitting element, improve the service efficiency of TS symbol and improve overall receptivity under current channel circumstance, provide condition for increase protection symbol under some channel circumstance in burst simultaneously, thereby further improve overall receptivity.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart of the training sequence symbols insertion method that Fig. 1 provides for one embodiment of the invention;
Fig. 2 is power delay profile schematic diagram in one embodiment of the invention;
The structure chart of the training sequence symbols insertion apparatus that Fig. 3 provides for one embodiment of the invention;
The structure chart of the training sequence symbols insertion apparatus that Fig. 4 provides for another embodiment of the present invention;
The structure chart of the training sequence symbols insertion apparatus that Fig. 5 provides for another embodiment of the present invention;
The structure chart of the training sequence symbols insertion apparatus that Fig. 6 provides for another embodiment of the present invention.
Embodiment
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, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
First introduce the training sequence symbols insertion method that the embodiment of the present invention provides, Fig. 1 has described the flow process of the training sequence symbols insertion method that one embodiment of the invention provides, and comprising:
101, obtain current channel circumstance.
Current channel circumstance is the residing channel circumstance of radio communication, take GERAN system as example, its typical case's application channel circumstance comprises TU (Typical case for Urban area) channel, RA (Typical case for Rural Area) channel and HT (Typical case for Hilly Terrain) channel etc.Transmitting terminal can by environmental parameter read or other announcement informations obtain current channel circumstance.
102, calculate the time delay expansion under current channel circumstance, and according to the coherence bandwidth (coherence bandwidth) of the current channel circumstance respective channels of time delay expansion calculating.
Wherein, time delay expansion can be calculated by power delay profile.Power delay profile derives from the local measured value of impulse response continuously and gets in short-term or space average.Usually, in a Large-scale areas mobile communication system, the statistics of multipath channel parameter just derives from the measured value of many local zones.
Fig. 2 is power delay profile schematic diagram in one embodiment of the invention, and wherein abscissa is time delay, and unit is that (s), ordinate is the power under corresponding time delay to μ to microsecond, and unit is decibel (dB).Time delay expansion
wherein
according to channel frequency correlations is defined in various degree, in one embodiment of the invention, coherence bandwidth can approximate
or
The power delay profile of several representative channel environment can be stored in transmitting terminal, and when having obtained after channel environmental information, transmitting terminal just can calculate by above-mentioned computational methods the coherence bandwidth of time delay expansion and respective channels.
For example, under TU channel circumstance, the time delay expansion that one embodiment of the invention is calculated gained is about 1us, and coherence bandwidth is about 200KHz.
Different channels has different time delay spreading parameters, also just has different coherence bandwidths.
103, determine the interval bandwidth between training sequence symbols, this interval bandwidth is less than the coherence bandwidth of channel.
Specifically interval bandwidth can be got into 1/2,1/4,1/8 etc. of coherence bandwidth, can select different interval bandwidth according to the difference of application channel circumstance, specifically can be rule of thumb or the assessment result of emulation determine interval bandwidth optimum under different application channel circumstance.
For example, be spaced apart 1/8 coherence bandwidth if get TS under TU channel circumstance, TS interval bandwidth is about 25KHz.
104, use the first quantity of interval bandwidth and transmitting element bandwidth calculation training sequence symbols.
The first quantity equals transmitting element bandwidth divided by the interval bandwidth between TS symbol.
For example, when transmitting element bandwidth is 270KHz, the first quantity equals 270KHz/25KHz, is about 11.
105, according to the channel estimating loss under current channel circumstance, the first quantity is adjusted, obtained the second quantity.
Wherein, in another embodiment of the present invention, can further calculate the space character number of TS symbol, the symbol quantity that the space character number of TS symbol can comprise according to transmitting element and the second quantity are calculated, particularly, the symbol quantity that the space character number of TS symbol can be comprised by transmitting element, divided by the second quantity, obtains after the business who obtains is rounded.
Due to the reason of environment and algorithm realization, need to adjust the quantity of TS symbol, particularly, can adjust the first quantity according to channel estimating loss, can carry out Simulation Evaluation to receptivity, according to the result of Simulation Evaluation, the first quantity be adjusted.Receive the impact of performance because environment and algorithm achieve a butt joint, the second quantity of the TS symbol after adjustment can be greater than or equal or be less than the first quantity.Under NSR by the emulation of channel estimating performance is thought in the time that TS quantity is 16; its channel estimating is lost in tolerance interval; after TS quantity is reduced to 16 by original 26, can improve overall receptivity by the mode at protection interval, therefore choosing 16 is the second quantity.In like manner, the TS symbolic number that can choose under HSR is 19.
106, the training sequence symbols of the second quantity is inserted to transmitting element.
Particularly, in one embodiment of the invention, can randomly the TS symbol of the second quantity be inserted to transmitting element.
In another embodiment of the present invention, the position of the training sequence symbols that can first determine the second quantity in transmitting element; Again the training sequence symbols of the second quantity is inserted to transmitting element according to position.
Wherein, in one embodiment of the invention, the position of the training sequence symbols of determining the second quantity in transmitting element can be in the following way: determine the position (first training sequence symbols here only refer to first computation sequence in) of first training sequence symbols in transmitting element; By all the other training sequence symbols except first training sequence symbols in the training sequence symbols of the second quantity, be distributed in the both sides of first training sequence symbols, the symbol quantity at any two adjacent training sequence symbols intervals is space character number.
The flow process of the position of the training sequence symbols of determining the second quantity that one embodiment of the invention provides in transmitting element is as follows:
1) determine symbol quantity N total in a transmitting element.
The transmitting element here refers to the data cell before IDFT in PCE transmission flow.Total symbolic number of transmitting element generally comprises effective information symbol, training sequence symbols and other ensure the correct additional character sending of effective information, as protection symbol etc.
2) space character of determining TS symbol is counted K.
The symbol numbers at TS interval equals a total symbolic number of transmitting element and then rounds and obtain divided by quantity (the second quantity) M of TS symbol.As being that 142, TS symbolic number is 16 o'clock when total symbolic number in a transmitting element, the space character number K of TS is 8 symbols.
3) determine the intermediate symbols position of a transmitting element.
When the symbol quantity comprising at a transmitting element is odd number, the character position in centre position is middle character position; When the symbol quantity comprising at transmitting element is even number, the symbol in centre position can be the character position of any one symbol in two middle symbols.In one embodiment of the invention, fixedly choose a character position that in two middle symbols, sequence number the is larger character position as centre position; In another embodiment of the present invention, fixedly choose a character position that in two middle symbols, sequence number the is less character position as centre position
Total symbolic number of supposing transmitting element is N, represents the position of each symbol with 0～N-1, and in the time that N is odd number, the character position in centre position is (N-1)/2; In the time that N is even number, according to choosing a character position that in two middle symbols, sequence number the is larger principle as the character position in centre position, the character position in centre position is N/2.For example, in the time of N=142, intermediate symbols position is 71.
4) determine the position of first TS symbol.
In order to make whole TS symbol symmetrical in transmitting element, in the time that TS symbol numbers is odd number, the position of first TS symbol is just the intermediate symbols position of transmitting element; In the time that TS symbol numbers is even number, the intermediate symbols position that the position of first TS symbol is transmitting element adds that TS space character counts the half of K.In one embodiment of the invention, in the time that K is even number, the half of K is K/2; In the time that K is odd number, the half of K is (K-1)/2.For example, work as N=142, when M=16, K=8, the position of first TS symbol is N/2+K/2=75.
5) position of removing other TS symbols of first TS outer symbol in M TS symbol is uniformly-spaced placed to both sides from first TS character position, between adjacent TS symbol, the symbol quantity at interval is that space character is counted K.
For example,, as N=140 or 142 or when 144, M=16, K=8, the character position of all TS can be expressed as TSPosbase=[11,19,27,35,43,51,59,67,75,83,91,99,107,115,123,131], wherein 11 represent that the character position of TS is the 11st character position in 140 or 142 or 144 character positions that comprise at transmitting element, and 19 other numerals such as grade by that analogy.
When N=140 or 142 or when 144, M=26, K=5, the character position of all TS can be expressed as TSPosbase=[8,13,18,23,28,33,38,43,48,53,58,63,68,73,78,83,88,93,98,103,108,113,118,123,128,133], wherein 8 represent that the character position of TS is the 8th character position in 140 or 142 or 144 character positions that comprise at transmitting element, and 13 other numerals such as grade by that analogy.
In the time of N=168 or 169, M=19, K=8, the character position of all TS can be expressed as TSPosbase=[12,20,28,36,44,52,60,68,76,84,92,100,108,116,124,132,140,148,156], wherein 12 represent that the character position of TS is the 12nd character position in 168 or 169 character positions that comprise at transmitting element, and 20 other numerals such as grade by that analogy.
In the time of N=168 or 169, M=31, K=5, the character position of all TS can be expressed as TSPosbase=[9,14,19,24,29,34,39,44,49,54,59,64,69,74,79,84,89,94,99,104,109,114,119,124,129,134,139,144,149,154,159], wherein 9 represent that the character position of TS is the 9th character position in 168 or 169 character positions that comprise at transmitting element, and 14 other numerals such as grade by that analogy.
Wherein, can slightly adjust owing to may exceeding location boundary at edge TS character position.
In one embodiment of the invention, the user of the user of different districts and inside, same cells can use identical TS position to carry out the insertion of TS symbol.In another embodiment of the present invention, in order to reduce the interference of minizone, can, having determined after a basic TS character position, calculate a position deviant; Again the home position of whole TS symbol is carried out to position skew according to deviant, thereby staggered in the position of the TS symbol of different districts, reduce the interference between each community.In one embodiment of the invention, this deviant can (can be CI according to cell ID in GERAN system, Cell Identity cell ID or CGI, Cell Global Identification--whole world cell identification) and the space character number of TS symbol calculate, for example deviant shift=Mod (CI, TS mark space symbolic number K), the TS character position after skew is: TSPos
shift=(TSPos
base+ shift) Mod N.By the planning of cell ID, different communities can produce different shift values, and after displacement, the TS position of different districts just can to a certain degree avoid conflict.In an alternative embodiment of the invention, the generation of each community shift value can be the producing method of other random number, as shift=[rand (0, K)] round.As long as it is less that random number produces the probability of conflict, so also can reduce TS position conflict between different districts.
In another embodiment of the present invention, the quantity of the TS symbol of the needs that obtain according to normal adjustment mode is the second quantity, because needs are at some TS character position continuous distribution TS symbol, therefore need on the basis of X, accelerate, the quantity of increase is determined by the TS symbol that needs continuous distribution; For example only need to be at 2 TS symbols of 1 position continuous distribution, the quantity of the TS symbol inserting in transmitting element is X+1.Now, the position of the training sequence symbols of determining the second quantity in transmitting element can be in the following way: determine the position of first training sequence symbols in transmitting element; By all the other training sequence symbols except first training sequence symbols in the training sequence symbols of the second quantity, be distributed in the both sides of a training sequence symbols; Wherein, in the adjacent-symbol position of at least one training sequence symbols of the training sequence symbols of the second quantity, further insert at least one training sequence symbols.After TS symbol is placed continuously, the channel information of continuous placement TS symbol is averaged and can be obtained more accurate channel information, thereby channel estimating is more optimized.
In the embodiment of the present invention, the TS symbol that inserts transmitting element can adopt following several mode to obtain:
1) from existing TS sequence, intercept and obtain.
For example, in NSR situation, consider the Cyclic Symmetry feature of existing TS symbol, can select former every group leader is that middle the second quantity TS symbol of 26 TS symbols is as the TS symbol that inserts transmitting element.For example, in one embodiment of the invention, the second quantity can be 16.
In HSR situation, can directly select former every group leader is 31 the second number of symbols that TS symbol is middle.For example in existing GERAN system, under NSR, TS sequence has 8 groups, as shown in table 1.
Table 1
| Group number | TS sequence |
| 1 | 1，1，-1，1，1，-1，1，-1，-1，-1，1，1，1，1，-1，1，1，1，-1，1，1，-1，1，-1，-1，-1 |
| 2 | 1，1，-1，1，-1，-1，1，-1，-1，-1，1，-1，-1，-1，-1，1，1，1，-1，1，-1，-1，1，-1，-1，-1 |
| 3 | 1，-1，1，1，1，1，-1，-1，-1，1，-1，-1，-1，1，-1，1，1，-1，1，1，1，1，-1，-1，-1，1 |
| 4 | 1，-1，1，1，1，-1，-1，-1，-1，1，-1，-1，1，-1，1，1，1，-1，1，1，1，-1，-1，-1，-1，1 |
| 5 | 1，1，1，-1，-1，1，-1，1，-1，-1，-1，1，1，-1，1，1，1，1，1，-1，-1，1，-1，1，-1，-1 |
| 6 | 1，-1，1，1，-1，-1，-1，1，-1，1，-1，-1，1，1，1，1，1，-1，1，1，-1，-1，-1，1，-1，1 |
| 7 | -1，1，-1，1，1，-1，-1，-1，-1，-1，1，-1，-1，1，1，1，-1，1，-1，1，1，-1，-1，-1，-1，-1 |
| 8 | -1，-1，-1，1，-1，-1，-1，-1，1，1，1，-1，1，1，-1，1，-1，-1，-1，1，-1，-1，-1，-1，1，1 |
In existing GERAN system, under HSR, TS sequence has 8 groups, as shown in table 2.
Table 2
| Group number | TS sequence |
| 1 | -1，1，-1，-1，1，-1，-1，-1，1，-1，1，1，1，1，1，1，1，-1，-1，1，-1，1，1，1，1，-1，-1，1，1，1，-1 |
| 2 | 1，1，1，-1，-1，1，1，-1，-1，-1，1，1，1，1，1，-1，1，-1，1，1，-1，1，-1，-1，-1，1，-1，-1，1，-1，-1 |
| 3 | 1，-1，-1，1，1，1，-1，1，1，1，-1，-1，1，-1，1，1，-1，1，1，1，1，1，-1，-1，-1，1，-1，1，-1，-1，-1 |
| 4 | -1，-1，-1，-1，1，1，1，-1，-1，-1，-1，-1，-1，1，-1，-1，1，1，1，-1，1，-1，1，1，-1，-1，1，-1，1，-1，-1 |
| 5 | 1，-1，1，-1，-1，1，1，1，-1，-1，-1，1，1，-1，1，1，-1，-1，1，-1，1，1，1，1，1，1，1，-1，1，-1，-1 |
| 6 | -1，-1，1，-1，1，-1，-1，1，1，-1，1，-1，1，1，1，-1，-1，1，-1，-1，-1，-1，-1，-1，1，1，1，-1，-1，-1，-1 |
| 7 | 1，-1，1，1，1，1，1，1，-1，1，1，-1，1，-1，-1，-1，1，1，1，-1，1，1，-1，-1，-1，1，1，1，-1，1，-1 |
| 8 | 1，-1，1，1，1，1，1，-1，1，1，-1，1，-1，1，1，1，-1，-1，-1，-1，1，1，-1，1，1，1，-1，1，1，-1，-1 |
In one embodiment of the invention, under NSR, the TS sequence of the second quantity can intercept from the TS sequence that table 1 or table 2 are described.In another embodiment of the present invention, suppose that under NSR, the second quantity is 16, the TS sequence of describing from table 1, intercept the TS sequence obtaining as shown in table 3.
Table 3
| Group number | TS sequence |
| 1 | -1，1，-1，-1，-1，1，1，1，1，-1，1，1，1，-1，1，1 |
| 2 | -1，1，-1，-1，-1，1，-1，-1，-1，-1，1，1，1，-1，1，-1 |
| 3 | ，1，-1，-1，-1，1，-1，-1，-1，1，-1，1，1，-1，1，1，1 |
| 4 | -1，-1，-1，-1，1，-1，-1，1，-1，1，1，1，-1，1，1，1 |
| 5 | ，1，-1，1，-1，-1，-1，1，1，-1，1，1，1，1，1，-1，-1 |
| 6 | -1，-1，1，-1，1，-1，-1，1，1，1，1，1，-1，1，1，-1 |
| 7 | -1，-1，-1，-1，-1，1，-1，-1，1，1，1，-1，1，-1，1，1 |
| 8 | -1，-1，-1，1，1，1，-1，1，1，-1，1，-1，-1，-1，1，-1 |
In one embodiment of the invention, under HSR, the TS sequence of the second quantity can intercept from the TS sequence that table 1 or table 2 are described.In another embodiment of the present invention, suppose that under HSR, the second quantity is at 19 o'clock, the TS sequence of describing from table 2, intercept the TS sequence obtaining as shown in table 4.
Table 4
| Group number | TS sequence |
| 1 | -1，-1，1，-1，1，1，1，1，1，1，1，-1，-1，1，-1，1，1，1，1 |
| 2 | 1，-1，-1，-1，1，1，1，1，1，-1，1，-1，1，1，-1，1，-1，-1，-1 |
| 3 | -1，1，1，1，-1，-1，1，-1，1，1，-1，1，1，1，1，1，-1，-1，-1 |
| 4 | 1，-1，-1，-1，-1，-1，-1，1，-1，-1，1，1，1，-1，1，-1，1，1，-1 |
| 5 | 1，1，-1，-1，-1，1，1，-1，1，1，-1，-1，1，-1，1，1，1，1，1 |
| 6 | -1，1，1，-1，1，-1，1，1，1，-1，-1，1，-1，-1，-1，-1，-1，-1，1 |
| 7 | 1，1，-1，1，1，-1，1，-1，-1，-1，1，1，1，-1，1，1，-1，-1，-1 |
| 8 | 1，-1，1，1，-1，1，-1，1，1，1，-1，-1，-1，-1，1，1，-1，1，1 |
2) exhaustive search obtains.
The long binary sequence for M always has 2
mkind combination, from this 2
min kind combination, according to certain selection principle, as average channel estimation error minimum, choose the sequence of some (being specifically as follows 8 groups) as last TS sequence.
The exhaustive search that one embodiment of the invention provides is in the following way:
First choose arbitrarily length and be one group of sequence of M as consensus sequence;
Then adopt the method for full search to select remaining several groups of sequences, the evaluated error value that its search principle is any two groups of sequences is less than a given error amount thresholding, and all sequences evaluated error and minimum.
Wherein, evaluated error is a kind of evaluating of channel estimating, and under noise scenarios, receiver module can be expressed as: r=F
haF
lh+w, wherein r is for receiving signal, and w is noise, and F is DFT matrix, and one timing of DFT length is a fixed matrix, and size is N*N, and A is for sending data matrix, and size is also N*N, F
lbe that the L intercepting above from F matrix is listed as the matrix forming, size is N*L, and h is channel factors, and size is L*1.Wherein, the exponent number that L is channel, the length that N is DFT.
When channel estimation calculation, A is the diagonal matrix of TS symbol in definite position, makes S=F
haF
l, evaluated error is expressed as: CE
error=trace[(S
hs)
-1].
It is 0.5, L=5 that one embodiment of the invention is chosen error threshold, and the sequence that is 26 to length carries out (2
26)
78 groups of TS sequences that inferior exhaustive search obtains, as shown in table 5, wherein first group is basic sequence.
Table 5
| Group number | TS sequence |
| 1 | 1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1 |
| 2 | 1，1，1，1，-1，-1，1，1，1，-1，-1，1，1，-1，1，-1，-1，1，1，-1，1，-1，-1，1，1，-1 |
| 3 | 1，1，-1，-1，1，1，1，1，-1，1，1，1，1，-1，-1，1，-1，1，-1，1，-1，-1，1，1，-1，-1 |
| 4 | 1，1，-1，-1，-1，-1，1，1，-1，-1，-1，1，1，1，-1，-1，1，1，-1，-1，-1，1，-1，1，-1，1 |
| 5 | 1，-1，1，-1，1，-1，1，-1，1，1，-1，1，-1，-1，-1，-1，1，-1，1，1，-1，1，-1，-1，1，-1 |
| 6 | 1，-1，-1，1，1，-1，1，-1，-1，1，-1，1，-1，1，1，-1，-1，-1，-1，1，1，-1，-1，-1，-1，1 |
| 7 | 1，-1，-1，1，-1，1，1，-1，-1，-1，1，1，-1，-1，1，1，1，-1，-1，-1，1，1，1，-1，-1，-1 |
| 8 | 1，-1，1，-1，-1，1，1，-1，1，-1，1，1，-1，1，-1，1，-1，-1，1，-1，-1，-1，1，-1，1，1 |
TS sequence set in table 5 has following characteristic: if any one or more symbol negates in base instruction row, the symbol of remaining 7 groups of sequence correspondence positions also correspondingly carries out after negate consistent with the characteristic of this training sequence group itself; Wherein, negate refers to the symbol in a sequence is transformed to-1 by 1, or is transformed to 1 by-1.
In another embodiment of the present invention, the TS sequence that under NSR or HSR, the TS sequence of the second quantity can be described from table 5, intercept.
3) use pseudo random sequence (PN sequence) to produce.
Concrete can select to use Gold sequence generation, Gold sequence can obtain after mould 2 is added with the m sequence preference identical with speed of a pair of cycle.The Gold sequence that TS symbol is on the same group not different parameters.
4) use Zadoff-Chu sequence or expansion Zadoff-Chu sequence (difference circulation version or the basic sequence of a sequence add rotation).TS symbol on the same group can not be that same basic Zadoff-Chu sequence adds that different angle rotations obtains.
From the above; the present embodiment can be determined the interval bandwidth between training sequence symbols according to current channel circumstance; and then determine the second quantity of the needed TS symbol of transmitting element under current channel circumstance; thereby only the TS symbol of needed the second quantity under current channel circumstance need to be inserted into transmitting element; improve the service efficiency of TS symbol and improve overall receptivity under current channel circumstance; provide condition for increase protection symbol under some channel circumstance in burst simultaneously, thereby further improved overall receptivity.Further, in one embodiment of the invention, the position of the TS symbol that can determine the second quantity in transmitting element, makes TS symbol in transmitting element, more meet current channel circumstance, further improves overall receptivity under current channel circumstance.Further, in one embodiment of the invention, behind position at the TS symbol of having determined the second quantity in transmitting element, deviant that can calculation training sequence symbol position, the training sequence symbols on both sides of a training sequence symbols will be distributed in again, carry out position skew according to deviant, thereby staggered in the position of the TS symbol of different districts, reduce the interference between each community.Further, in one embodiment of the invention, the training sequence symbols on the both sides that are distributed in a training sequence symbols can be had at least two training sequence symbols continuous distribution, and then the channel information of continuous placement TS symbol is averaged and can be obtained more accurate channel information, thereby channel estimating is more optimized.
It should be noted that, for aforesaid each embodiment of the method, for simple description, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the present invention is not subject to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
Introduce the training sequence symbols insertion apparatus that the embodiment of the present invention provides as follows, the structure of the training sequence symbols insertion apparatus that one embodiment of the invention provides as shown in Figure 3, comprising again:
Plug-in unit 303, inserts the transmitting element under described current channel circumstance for the training sequence symbols of the second quantity that described computing unit is calculated.
In another embodiment of the present invention, as shown in Figure 3, plug-in unit 303 can comprise: position determination unit 3031, for determining that the training sequence symbols of described the second quantity is in the position of described transmitting element; Symbol plug-in unit 3032, for inserting described transmitting element by the training sequence symbols of described the second quantity according to the definite position of described position determination unit 3031.
From the above; the present embodiment can be determined the interval bandwidth between training sequence symbols according to current channel circumstance; and then determine the second quantity of the needed TS symbol of transmitting element under current channel circumstance; thereby only the TS symbol of needed the second quantity under current channel circumstance need to be inserted into transmitting element; improve the service efficiency of TS symbol and improve overall receptivity under current channel circumstance; provide condition for increase protection symbol under some channel circumstance in burst simultaneously, thereby further improved overall receptivity.Further, in one embodiment of the invention, the position of the TS symbol that can determine the second quantity in transmitting element, makes TS symbol in transmitting element, more meet current channel circumstance, further improves overall receptivity under current channel circumstance.
The structure of the training sequence symbols insertion apparatus that another embodiment of the present invention provides as shown in Figure 4, comprising:
Plug-in unit 403, inserts the transmitting element under described current channel circumstance for the training sequence symbols of the second quantity that described computing unit is calculated.
In another embodiment of the present invention, as shown in Figure 4, plug-in unit 403 can comprise: position determination unit 4031, for determining that the training sequence symbols of described the second quantity is in the position of described transmitting element; Symbol plug-in unit 4032, for inserting described transmitting element by the training sequence symbols of described the second quantity according to the definite position of described position determination unit 4031.
In another embodiment of the present invention, as shown in Figure 4, position determination unit 4031 comprises: the first character position determining unit 40311, for determining the position of first training sequence symbols at transmitting element; Second symbol position determination unit 40312, for all the other training sequence symbols except a training sequence symbols by the training sequence symbols of the second quantity, be distributed in the both sides of a training sequence symbols, the symbol quantity at any two adjacent training sequence symbols intervals is space character number.
From the above; the present embodiment can be determined the interval bandwidth between training sequence symbols according to current channel circumstance; and then determine the second quantity of the needed TS symbol of transmitting element under current channel circumstance; thereby only the TS symbol of needed the second quantity under current channel circumstance need to be inserted into transmitting element; improve the service efficiency of TS symbol and improve overall receptivity under current channel circumstance; provide condition for increase protection symbol under some channel circumstance in burst simultaneously, thereby further improved overall receptivity.Further, the position of the TS symbol that can determine the second quantity in transmitting element, makes TS symbol in transmitting element, more meet current channel circumstance, further improves overall receptivity under current channel circumstance.
The structure of the training sequence symbols insertion apparatus that another embodiment of the present invention provides as shown in Figure 5, comprising:
Plug-in unit 503, inserts the transmitting element under described current channel circumstance for the training sequence symbols of the second quantity that described computing unit is calculated.
In another embodiment of the present invention, as shown in Figure 5, plug-in unit 503 can comprise: position determination unit 5031, for determining that the training sequence symbols of described the second quantity is in the position of described transmitting element; Symbol plug-in unit 5032, for inserting described transmitting element by the training sequence symbols of described the second quantity according to the definite position of described position determination unit 5031.
In another embodiment of the present invention, as shown in Figure 5, position determination unit 5031 comprises: the first character position determining unit 50311, and for determining the position of first training sequence symbols at transmitting element.Second symbol position determination unit 50312, for all the other training sequence symbols except first training sequence symbols by the training sequence symbols of the second quantity, be distributed in the both sides of first training sequence symbols, the symbol quantity at any two adjacent training sequence symbols intervals is space character number.Deviant computing unit 50313, for the deviant of calculation training sequence symbol position.Character position determining unit 50312, also for by the training sequence symbols of the second quantity, the deviant calculating according to deviant computing unit 50313 is carried out position skew.
From the above; the present embodiment can be determined the interval bandwidth between training sequence symbols according to current channel circumstance; and then determine the second quantity of the needed TS symbol of transmitting element under current channel circumstance; thereby only the TS symbol of needed the second quantity under current channel circumstance need to be inserted into transmitting element; improve the service efficiency of TS symbol and improve overall receptivity under current channel circumstance; provide condition for increase protection symbol under some channel circumstance in burst simultaneously, thereby further improved overall receptivity.Further, the position of the TS symbol that can determine the second quantity in transmitting element, makes TS symbol in transmitting element, more meet current channel circumstance, further improves overall receptivity under current channel circumstance.Further, behind position at the TS symbol of having determined the second quantity in transmitting element, deviant that can calculation training sequence symbol position, the training sequence symbols on both sides of a training sequence symbols will be distributed in again, carry out position skew according to deviant, thereby staggered in the position of the TS symbol of different districts, reduce the interference between each community.
The structure of the training sequence symbols insertion apparatus that another embodiment of the present invention provides as shown in Figure 6, comprising:
Plug-in unit 603, inserts the transmitting element under described current channel circumstance for the training sequence symbols of the second quantity that described computing unit is calculated.
In another embodiment of the present invention, as shown in Figure 6, plug-in unit 603 can comprise: position determination unit 6031, for determining that the training sequence symbols of described the second quantity is in the position of described transmitting element; Symbol plug-in unit 6032, for inserting described transmitting element by the training sequence symbols of described the second quantity according to the definite position of described position determination unit 6031.
In another embodiment of the present invention, as shown in Figure 6, position determination unit 6031 comprises: the 3rd character position determining unit 60311, and for determining the position of first training sequence symbols at transmitting element.The 4th character position determining unit 60312, for all the other training sequence symbols except first training sequence symbols by the training sequence symbols of the second quantity, is distributed in the both sides of a training sequence symbols; In the adjacent-symbol position of at least one training sequence symbols of the training sequence symbols of the second quantity, further insert at least one training sequence symbols, the symbol quantity at discontinuously arranged adjacent training sequence symbols interval is space character number arbitrarily.
From the above; the present embodiment can be determined the interval bandwidth between training sequence symbols according to current channel circumstance; and then determine the second quantity of the needed TS symbol of transmitting element under current channel circumstance; thereby only the TS symbol of needed the second quantity under current channel circumstance need to be inserted into transmitting element; improve the service efficiency of TS symbol and improve overall receptivity under current channel circumstance; provide condition for increase protection symbol under some channel circumstance in burst simultaneously, thereby further improved overall receptivity.In one embodiment of the invention, the position of the TS symbol that can determine the second quantity in transmitting element, makes TS symbol in transmitting element, more meet current channel circumstance, further improves overall receptivity under current channel circumstance.Further, the training sequence symbols on the both sides that are distributed in a training sequence symbols can be had at least two training sequence symbols continuous distribution, and then the channel information of continuous placement TS symbol is averaged and can be obtained more accurate channel information, thereby channel estimating is more optimized.
One embodiment of the invention also provides communication system, and this communication system comprises the training sequence symbols insertion apparatus that the embodiment of the present invention provides.
The content such as information interaction, implementation between said apparatus and intrasystem each module, due to the inventive method embodiment based on same design, particular content can, referring to the narration in the inventive method embodiment, repeat no more herein.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, above-mentioned program can be stored in a computer read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, above-mentioned storage medium can be magnetic disc, CD, read-only store-memory body (ROM:Read-Only Memory) or random store-memory body (RAM:Random Access Memory) etc.
Applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and thought thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (20)
1. a training sequence symbols insertion method, is characterized in that, comprising:
Obtain current channel circumstance, calculate the time delay expansion under described current channel circumstance, calculate the coherence bandwidth of current channel circumstance respective channels according to described time delay expansion;
Determine the interval bandwidth between training sequence symbols, described interval bandwidth is less than described coherence bandwidth;
Use described in described interval bandwidth and transmitting element bandwidth calculation the first quantity of required training sequence symbols in transmitting element;
According to the channel estimating loss under described current channel circumstance, described the first quantity is adjusted, obtained the second quantity;
The training sequence symbols of described the second quantity is inserted to transmitting element.
2. training sequence symbols insertion method as claimed in claim 1, is characterized in that, the described training sequence symbols by described the second quantity is inserted transmitting element and comprised:
The position of the training sequence symbols of determining described the second quantity in described transmitting element;
The training sequence symbols of described the second quantity is inserted to described transmitting element according to described position.
3. training sequence symbols insertion method as claimed in claim 2, is characterized in that, after acquisition the second quantity, further comprises:
The space character number of the symbol quantity comprising according to described transmitting element and described the second quantity calculation training sequence symbol.
4. training sequence symbols insertion method as claimed in claim 3, is characterized in that, the position of the training sequence symbols of described definite described the second quantity in described transmitting element comprises:
Determine the position of first training sequence symbols in described transmitting element;
By all the other training sequence symbols except described first training sequence symbols in the training sequence symbols of described the second quantity, the both sides that are distributed in described first training sequence symbols, the symbol quantity at any two adjacent training sequence symbols intervals is described space character number.
5. training sequence symbols insertion method as claimed in claim 4, is characterized in that, the training sequence symbols of determining described the second quantity further comprises behind the position in described transmitting element:
The deviant of calculation training sequence symbol position;
By the training sequence symbols of described the second quantity, carry out position skew according to described deviant.
6. training sequence symbols insertion method as claimed in claim 3, is characterized in that, the position of the training sequence symbols of described definite described the second quantity in described transmitting element comprises:
Determine the position of first training sequence symbols in described transmitting element;
By all the other training sequence symbols except described first training sequence symbols in the training sequence symbols of described the second quantity, be distributed in the both sides of described first training sequence symbols; In the adjacent-symbol position of at least one training sequence symbols of the training sequence symbols of described the second quantity, further insert at least one training sequence symbols.
7. training sequence symbols insertion method as claimed in claim 3, is characterized in that, the symbol quantity that described transmitting element comprises is 140 or 142 or 144, and described the second quantity is 16, and the space character number of described training sequence symbols is 8;
16 training sequence symbols position in 140 or 142 or 144 included character positions of described transmitting element is specially:
11,19,27,35,43,51,59,67,75,83,91,99,107,115,123,131。
8. training sequence symbols insertion method as claimed in claim 7, is characterized in that, described 16 training sequence symbols are specially:
-1,1 ,-1 ,-1 ,-1,1,1,1,1 ,-1,1,1,1 ,-1,1,1; Or
-1,1 ,-1 ,-1 ,-1,1 ,-1 ,-1 ,-1 ,-1,1,1,1 ,-1,1 ,-1; Or
1 ,-1 ,-1 ,-1,1 ,-1 ,-1 ,-1,1 ,-1,1,1 ,-1,1,1,1; Or
-1 ,-1 ,-1 ,-1,1 ,-1 ,-1,1 ,-1,1,1,1 ,-1,1,1,1; Or
1 ,-1,1 ,-1 ,-1 ,-1,1,1 ,-1,1,1,1,1,1 ,-1 ,-1; Or
-1 ,-1,1 ,-1,1 ,-1 ,-1,1,1,1,1,1 ,-1,1,1 ,-1; Or
-1 ,-1 ,-1 ,-1 ,-1,1 ,-1 ,-1,1,1,1 ,-1,1 ,-1,1,1; Or
-1,-1,-1,1,1,1,-1,1,1,-1,1,-1,-1,-1,1,-1。
9. training sequence symbols insertion method as claimed in claim 3, is characterized in that, the symbol quantity that described transmitting element comprises is 168 or 169, and described the second quantity is 19, and the space character number of described training sequence symbols is 8;
The position of described 19 training sequence symbols in 168 or 169 included character positions of described transmitting element is specially:
12,20,28,36,44,52,60,68,76,84,92,100,108,116,124,132,140,148,156。
10. training sequence symbols insertion method as claimed in claim 9, is characterized in that, described 19 training sequence symbols are specially:
-1 ,-1,1 ,-1,1,1,1,1,1,1,1 ,-1 ,-1,1 ,-1,1,1,1,1; Or
1 ,-1 ,-1 ,-1,1,1,1,1,1 ,-1,1 ,-1,1,1 ,-1,1 ,-1 ,-1 ,-1; Or
-1,1,1,1 ,-1 ,-1,1 ,-1,1,1 ,-1,1,1,1,1,1 ,-1 ,-1 ,-1; Or
1 ,-1 ,-1 ,-1 ,-1 ,-1 ,-1,1 ,-1 ,-1,1,1,1 ,-1,1 ,-1,1,1 ,-1; Or
1,1 ,-1 ,-1 ,-1,1,1 ,-1,1,1 ,-1 ,-1,1 ,-1,1,1,1,1,1; Or
-1,1,1 ,-1,1 ,-1,1,1,1 ,-1 ,-1,1 ,-1 ,-1 ,-1 ,-1 ,-1 ,-1,1; Or
1,1 ,-1,1,1 ,-1,1 ,-1 ,-1 ,-1,1,1,1 ,-1,1,1 ,-1 ,-1 ,-1; Or
1,-1,1,1,-1,1,-1,1,1,1,-1,-1,-1,-1,1,1,-1,1,1。
11. training sequence symbols insertion methods as claimed in claim 3, is characterized in that, the symbol quantity that described transmitting element comprises is 140 or 142 or 144, and described the second quantity is 26, and the space character number of described training sequence symbols is 5;
16 training sequence symbols position in 140 or 142 or 144 included character positions of described transmitting element is specially:
8,13,18,23,28,33,38,43,48,53,58,63,68,73,78,83,88,93,98,103,108,113,118,123,128,133。
12. training sequence symbols insertion methods as claimed in claim 11, is characterized in that, described 26 training sequence symbols are specially:
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1; Or
1,1,1,1 ,-1 ,-1,1,1,1 ,-1 ,-1,1,1 ,-1,1 ,-1 ,-1,1,1 ,-1,1 ,-1 ,-1,1,1 ,-1; Or
1,1 ,-1 ,-1,1,1,1,1 ,-1,1,1,1,1 ,-1 ,-1,1 ,-1,1 ,-1,1 ,-1 ,-1,1,1 ,-1 ,-1; Or
1,1 ,-1 ,-1 ,-1 ,-1,1,1 ,-1 ,-1 ,-1,1,1,1 ,-1 ,-1,1,1 ,-1 ,-1 ,-1,1 ,-1,1 ,-1,1; Or
1 ,-1,1 ,-1,1 ,-1,1 ,-1,1,1 ,-1,1 ,-1 ,-1 ,-1 ,-1,1 ,-1,1,1 ,-1,1 ,-1 ,-1,1 ,-1; Or
1 ,-1 ,-1,1,1 ,-1,1 ,-1 ,-1,1 ,-1,1 ,-1,1,1 ,-1 ,-1 ,-1 ,-1,1,1 ,-1 ,-1 ,-1 ,-1,1; Or
1 ,-1 ,-1,1 ,-1,1,1 ,-1 ,-1 ,-1,1,1 ,-1 ,-1,1,1,1 ,-1 ,-1 ,-1,1,1,1 ,-1 ,-1 ,-1; Or
1,-1,1,-1,-1,1,1,-1,1,-1,1,1,-1,1,-1,1,-1,-1,1,-1,-1,-1,1,-1,1,1。
13. training sequence symbols insertion methods as claimed in claim 3, is characterized in that, the symbol quantity that described transmitting element comprises is 168 or 169, and described the second quantity is 31, and the space character number of described training sequence symbols is 5;
The position of described 31 training sequence symbols in 168 or 169 included character positions of described transmitting element is specially:
9,14,19,24,29,34,39,44,49,54,59,64,69,74,79,84,89,94,99,104,109,114,119,124,129,134,139,144,149,154,159。
14. training sequence symbols insertion methods as described in as arbitrary in claim 1 to 6, is characterized in that, the training sequence symbols of described the second quantity from
1,1 ,-1,1,1 ,-1,1 ,-1 ,-1 ,-1,1,1,1,1 ,-1,1,1,1 ,-1,1,1 ,-1,1 ,-1 ,-1 ,-1; Or
1,1 ,-1,1 ,-1 ,-1,1 ,-1 ,-1 ,-1,1 ,-1 ,-1 ,-1 ,-1,1,1,1 ,-1,1 ,-1 ,-1,1 ,-1 ,-1 ,-1; Or
1 ,-1,1,1,1,1 ,-1 ,-1 ,-1,1 ,-1 ,-1 ,-1,1 ,-1,1,1 ,-1,1,1,1,1 ,-1 ,-1 ,-1,1; Or
1 ,-1,1,1,1 ,-1 ,-1 ,-1 ,-1,1 ,-1 ,-1,1 ,-1,1,1,1 ,-1,1,1,1 ,-1 ,-1 ,-1 ,-1,1; Or
1,1,1 ,-1 ,-1,1 ,-1,1 ,-1 ,-1 ,-1,1,1 ,-1,1,1,1,1,1 ,-1 ,-1,1 ,-1,1 ,-1 ,-1; Or
1 ,-1,1,1 ,-1 ,-1 ,-1,1 ,-1,1 ,-1 ,-1,1,1,1,1,1 ,-1,1,1 ,-1 ,-1 ,-1,1 ,-1,1; Or
-1,1 ,-1,1,1 ,-1 ,-1 ,-1 ,-1 ,-1,1 ,-1 ,-1,1,1,1 ,-1,1 ,-1,1,1 ,-1 ,-1 ,-1 ,-1 ,-1; Or
-1 ,-1 ,-1,1 ,-1 ,-1 ,-1 ,-1,1,1,1 ,-1,1,1 ,-1,1 ,-1 ,-1 ,-1,1 ,-1 ,-1 ,-1 ,-1,1,1; Or
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1; Or
1,1,1,1 ,-1 ,-1,1,1,1 ,-1 ,-1,1,1 ,-1,1 ,-1 ,-1,1,1 ,-1,1 ,-1 ,-1,1,1 ,-1; Or
1,1 ,-1 ,-1,1,1,1,1 ,-1,1,1,1,1 ,-1 ,-1,1 ,-1,1 ,-1,1 ,-1 ,-1,1,1 ,-1 ,-1; Or
1,1 ,-1 ,-1 ,-1 ,-1,1,1 ,-1 ,-1 ,-1,1,1,1 ,-1 ,-1,1,1 ,-1 ,-1 ,-1,1 ,-1,1 ,-1,1; Or
1 ,-1,1 ,-1,1 ,-1,1 ,-1,1,1 ,-1,1 ,-1 ,-1 ,-1 ,-1,1 ,-1,1,1 ,-1,1 ,-1 ,-1,1 ,-1; Or
1 ,-1 ,-1,1,1 ,-1,1 ,-1 ,-1,1 ,-1,1 ,-1,1,1 ,-1 ,-1 ,-1 ,-1,1,1 ,-1 ,-1 ,-1 ,-1,1; Or
1 ,-1 ,-1,1 ,-1,1,1 ,-1 ,-1 ,-1,1,1 ,-1 ,-1,1,1,1 ,-1 ,-1 ,-1,1,1,1 ,-1 ,-1 ,-1; Or
1 ,-1,1 ,-1 ,-1,1,1 ,-1,1 ,-1,1,1 ,-1,1 ,-1,1 ,-1 ,-1,1 ,-1 ,-1 ,-1,1 ,-1,1,1; Or
-1,1 ,-1 ,-1,1 ,-1 ,-1 ,-1,1 ,-1,1,1,1,1,1,1,1 ,-1 ,-1,1 ,-1,1,1,1,1 ,-1 ,-1,1,1,1 ,-1; Or
1,1,1 ,-1 ,-1,1,1 ,-1 ,-1 ,-1,1,1,1,1,1 ,-1,1 ,-1,1,1 ,-1,1 ,-1 ,-1 ,-1,1 ,-1 ,-1,1 ,-1 ,-1; Or
1 ,-1 ,-1,1,1,1 ,-1,1,1,1 ,-1 ,-1,1 ,-1,1,1 ,-1,1,1,1,1,1 ,-1 ,-1 ,-1,1 ,-1,1 ,-1 ,-1 ,-1; Or
-1 ,-1 ,-1 ,-1,1,1,1 ,-1 ,-1 ,-1 ,-1 ,-1 ,-1,1 ,-1 ,-1,1,1,1 ,-1,1 ,-1,1,1 ,-1 ,-1,1 ,-1,1 ,-1 ,-1; Or
1 ,-1,1 ,-1 ,-1,1,1,1 ,-1 ,-1 ,-1,1,1 ,-1,1,1 ,-1 ,-1,1 ,-1,1,1,1,1,1,1,1 ,-1,1 ,-1 ,-1; Or
-1 ,-1,1 ,-1,1 ,-1 ,-1,1,1 ,-1,1 ,-1,1,1,1 ,-1 ,-1,1 ,-1 ,-1 ,-1 ,-1 ,-1 ,-1,1,1,1 ,-1 ,-1 ,-1 ,-1; Or
1 ,-1,1,1,1,1,1,1 ,-1,1,1 ,-1,1 ,-1 ,-1 ,-1,1,1,1 ,-1,1,1 ,-1 ,-1 ,-1,1,1,1 ,-1,1 ,-1; Or
In 1 ,-1,1,1,1,1,1 ,-1,1,1 ,-1,1 ,-1,1,1,1 ,-1 ,-1 ,-1 ,-1,1,1 ,-1,1,1,1 ,-1,1,1 ,-1 ,-1, intercept.
15. 1 kinds of training sequence symbols insertion apparatus, is characterized in that, comprising:
Bandwidth acquiring unit, for obtaining current channel circumstance, calculates the time delay expansion under described current channel circumstance, calculates the coherence bandwidth of current channel circumstance respective channels according to described time delay expansion; Determine the interval bandwidth between training sequence symbols, described interval bandwidth is less than described coherence bandwidth;
Computing unit, for using interval bandwidth that described bandwidth acquiring unit obtains and the first quantity of transmitting element bandwidth calculation training sequence symbols; According to the channel estimating loss under described current channel circumstance, described the first quantity is adjusted, obtained the second quantity;
Plug-in unit, inserts transmitting element for the training sequence symbols of the second quantity that described computing unit is calculated.
16. training sequence symbols insertion apparatus as claimed in claim 15, is characterized in that, described plug-in unit comprises:
Position determination unit, for determining that the training sequence symbols of described the second quantity is in the position of described transmitting element;
Symbol plug-in unit, for inserting described transmitting element by the training sequence symbols of described the second quantity according to the definite position of described position determination unit.
17. training sequence symbols insertion apparatus as claimed in claim 16, is characterized in that, described computing unit is also for the space character number of the interval bandwidth calculation TS symbol that obtains according to described bandwidth acquiring unit;
Described position determination unit comprises:
The first character position determining unit, for determining the position of first training sequence symbols at described transmitting element;
Second symbol position determination unit, for all the other training sequence symbols except described first training sequence symbols by the training sequence symbols of described the second quantity, the both sides that are distributed in described first training sequence symbols, the symbol quantity at any two adjacent training sequence symbols intervals is described space character number.
18. training sequence symbols insertion apparatus as described in claim 16 or 17, is characterized in that, described position determination unit also comprises:
Deviant computing unit, for the deviant of calculation training sequence symbol position;
Described character position determining unit, also for by the training sequence symbols of described the second quantity, the deviant calculating according to described deviant computing unit is carried out position skew.
19. training sequence symbols insertion apparatus as claimed in claim 16, is characterized in that, described computing unit is also for the space character number of the interval bandwidth calculation TS symbol that obtains according to described bandwidth acquiring unit;
Described position determination unit comprises:
The 3rd character position determining unit, for determining the position of first training sequence symbols at described transmitting element;
The 4th character position determining unit, for all the other training sequence symbols except described first training sequence symbols by the training sequence symbols of described the second quantity, is distributed in the both sides of described first training sequence symbols; In the adjacent-symbol position of at least one training sequence symbols of the training sequence symbols of described the second quantity, further insert at least one training sequence symbols, arbitrarily space character number described in the sign digit at discontinuously arranged adjacent training sequence symbols interval.
20. 1 kinds of communication systems, is characterized in that, comprise the training sequence symbols insertion apparatus as described in as arbitrary in claim 15 to 19.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010268991.3A CN102377704B (en) | 2010-08-24 | 2010-08-24 | Training sequence symbol insertion method and device as well as communication system |
| PCT/CN2011/075060 WO2011137857A1 (en) | 2010-08-24 | 2011-05-31 | Method, apparatus and communication system for inserting training sequence symbols |
Applications Claiming Priority (1)
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| EP0615352A1 (en) * | 1993-03-09 | 1994-09-14 | Nokia Mobile Phones Ltd. | Radio telephone system using a variable length training sequence |
| CN101112114A (en) * | 2005-01-31 | 2008-01-23 | 皇家飞利浦电子股份有限公司 | Method and device for using training sequence with variation length in wireless communication |
| EP1983708A1 (en) * | 2007-04-18 | 2008-10-22 | Samsung Electronics Co., Ltd | Method and apparatus for generating training sequence codes in a communication system |
| CN101480008A (en) * | 2006-04-24 | 2009-07-08 | 韩国电子通信研究院 | Method of generating pilot pattern for adaptive channel estimation in ofdma systems, method of transmitting/receiving using the pilot pattern and apparatus thereof |
| CN101686065A (en) * | 2008-09-24 | 2010-03-31 | 华为技术有限公司 | Method and device for generating training sequence groups, and methods and equipment for modulation and demodulation |
| CN101771433A (en) * | 2008-12-26 | 2010-07-07 | 中兴通讯股份有限公司 | Distribution method and system for midamble in space division multiple address (SDMA) system |
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| EP0615352A1 (en) * | 1993-03-09 | 1994-09-14 | Nokia Mobile Phones Ltd. | Radio telephone system using a variable length training sequence |
| CN101112114A (en) * | 2005-01-31 | 2008-01-23 | 皇家飞利浦电子股份有限公司 | Method and device for using training sequence with variation length in wireless communication |
| CN101480008A (en) * | 2006-04-24 | 2009-07-08 | 韩国电子通信研究院 | Method of generating pilot pattern for adaptive channel estimation in ofdma systems, method of transmitting/receiving using the pilot pattern and apparatus thereof |
| EP1983708A1 (en) * | 2007-04-18 | 2008-10-22 | Samsung Electronics Co., Ltd | Method and apparatus for generating training sequence codes in a communication system |
| CN101686065A (en) * | 2008-09-24 | 2010-03-31 | 华为技术有限公司 | Method and device for generating training sequence groups, and methods and equipment for modulation and demodulation |
| CN101771433A (en) * | 2008-12-26 | 2010-07-07 | 中兴通讯股份有限公司 | Distribution method and system for midamble in space division multiple address (SDMA) system |
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| WO2011137857A1 (en) | 2011-11-10 |
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