CN102377704A - 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
- Publication number
- CN102377704A CN102377704A CN2010102689913A CN201010268991A CN102377704A CN 102377704 A CN102377704 A CN 102377704A CN 2010102689913 A CN2010102689913 A CN 2010102689913A CN 201010268991 A CN201010268991 A CN 201010268991A CN 102377704 A CN102377704 A CN 102377704A
- Authority
- CN
- China
- Prior art keywords
- training sequence
- sequence symbols
- transmitting element
- symbol
- symbols
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
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 the user to communication system require increasingly highly, development of Communication Technique 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) system's packet wireless business and is just experiencing general packet radio service technology (GPRS:General Packet Radio Service); The GPRS (EGPRS:Enhanced GPRS) that strengthens, the evolution process in the GPRS stage two of enhancing (EGPRS2:Enhanced GPRS phase 2).The performance boost of Packet data service mainly is the lifting of data throughout.Wherein, It is GPRS stage two (PCE:Precoded EGPRS2) scheme of the enhancing of precoding that existing a kind of EGPRS2 improves technology; The transmission flow of this scheme comprises: transmitting element format (Burst formatting), sign map, inverse discrete Fourier transformer inverse-discrete (IDFT), add Cyclic Prefix (CP) and transmission pulse-shaping steps such as (TX Pulse Shaping), wherein the effect of Burst formatting is to organize the effective information data and is the transmission form of other information datas of assurance effective information correct transmission.The effective information data here are meant coding back user's business datum, and the 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 carries out the minimum information unit that PCE sends, and its time that takies 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 used the TS symbol of fixed qty, under ordinary symbol speed (NSR:Normal Symbol Rate), be 26 TS symbols for example; Under high character rate (HSR:Higher Symbol Rate) is 31 TS symbols; And the position of these TS symbols is also fixed, so such scheme all can usage quantity and all fixing TS symbol in position at various application channel circumstance, and along with the difference of using channel circumstance; Corresponding channel characteristics is also different; Therefore all fixing TS symbol in usage quantity and position can not be applicable to all channel circumstances, can reduce the whole receptivity under some channel circumstance, and; The quantity of TS symbol and position; Not only can influence the performance of receiver channel estimating part, the quantity that has influence on protection symbol among the burst that also can be indirect, thus influence whole receptivity.
Summary of the invention
The embodiment of the invention provides training sequence symbols insertion method, device and communication system, can make the training sequence symbols of insertion more be applicable to current channel circumstance, improves whole 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 the said current channel circumstance, calculate the coherence bandwidth of current channel circumstance respective channels according to said time delay expansion;
Confirm the interval bandwidth between the training sequence symbols, said interval bandwidth is less than said coherence bandwidth;
Use first quantity of required training sequence symbols in said interval bandwidth and the said transmitting element of transmitting element bandwidth calculation;
Loss is adjusted said first quantity according to the channel estimating under the said current channel circumstance, obtains second quantity;
The training sequence symbols of said second quantity is inserted transmitting element.
Another embodiment of the present invention provides a kind of training sequence symbols to insert device, comprising:
The bandwidth acquiring unit is used to obtain current channel circumstance, calculates the time delay expansion under the said current channel circumstance, calculates the coherence bandwidth of current channel circumstance respective channels according to said time delay expansion; Confirm the interval bandwidth between the training sequence symbols, said interval bandwidth is less than said coherence bandwidth;
Computing unit is used to use interval bandwidth that said bandwidth acquiring unit obtains and first quantity of transmitting element bandwidth calculation training sequence symbols; Loss is adjusted said first quantity according to the channel estimating under the said current channel circumstance, obtains second quantity;
Insert the unit, the training sequence symbols of second quantity that is used for said computing unit is calculated is inserted transmitting element.
Another embodiment of the present invention provides a kind of communication system, comprises the training sequence symbols insertion device that the embodiment of the invention provides.
Can find out from the above technical scheme that the embodiment of the invention provides; Because the embodiment of the invention can be confirmed the interval bandwidth between the training sequence symbols according to current channel circumstance; And then confirm second quantity of the needed TS symbol of transmitting element under the current channel circumstance; Thereby only need the TS symbol of needed second quantity under the current channel circumstance be inserted into transmitting element; Improve the service efficiency of TS symbol and improve whole receptivity under the current channel circumstance, in burst, increasing the protection symbol under some channel circumstance condition is provided simultaneously, thereby has further improved whole receptivity.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
The flow chart of the training sequence symbols insertion method that Fig. 1 provides for one embodiment of the invention;
Fig. 2 is a power delay profile sketch map in the one embodiment of the invention;
The training sequence symbols that Fig. 3 provides for one embodiment of the invention is inserted the structure chart of device;
The training sequence symbols that Fig. 4 provides for another embodiment of the present invention is inserted the structure chart of device;
The training sequence symbols that Fig. 5 provides for another embodiment of the present invention is inserted the structure chart of device;
The training sequence symbols that Fig. 6 provides for another embodiment of the present invention is inserted the structure chart of device.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Introduce the training sequence symbols insertion method that the embodiment of the invention provides earlier, 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; With the GERAN system is example, and its typical 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 through environmental parameter read or other announcement informations obtain current channel circumstance.
102, the time delay of calculating under the current channel circumstance is expanded, and expands the coherence bandwidth (coherence bandwidth) that calculates current channel circumstance respective channels according to time delay.
Wherein, the 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 zone GSM, the statistics of multipath channel parameter just derives from the measured value of many local zones.
Fig. 2 is a power delay profile sketch map in the one embodiment of the invention, and wherein abscissa is a time delay, and unit is microsecond (μ s), and ordinate is the power under the corresponding time delay, and unit is a decibel (dB).Then wherein
is according to defining in various degree channel frequency correlations in time delay expansion
, and coherence bandwidth can approximate
or
in the one embodiment of the invention
The power delay profile of several kinds of representative channel environment can be stored in transmitting terminal, and after having obtained channel environmental information, transmitting terminal just can calculate the coherence bandwidth of time delay expansion and respective channels through the aforementioned calculation method.
For example, under the TU channel circumstance, the time delay expansion that one embodiment of the invention is calculated gained is about 1us, and then coherence bandwidth is about 200KHz.
Different channels has different time delay spreading parameters, and different coherence bandwidths is also just arranged.
103, confirm interval bandwidth between the training sequence symbols, this at interval bandwidth less than the coherence bandwidth of channel.
Specifically can bandwidth at interval be got into 1/2,1/4,1/8 etc. of coherence bandwidth; Difference according to using channel circumstance can be selected different interval bandwidth, specifically can be rule of thumb or the assessment result of emulation confirm the interval bandwidth of the optimum different application channel circumstance under.
For example, the TU channel circumstance is down if getting TS is spaced apart 1/8 coherence bandwidth, and then TS interval bandwidth is about 25KHz.
104, use first quantity of interval bandwidth and transmitting element bandwidth calculation training sequence symbols.
First quantity equals the transmitting element bandwidth divided by the interval bandwidth between the TS symbol.
For example, when the transmitting element bandwidth was 270KHz, first quantity equaled 270KHz/25KHz, was about 11.
105, loss is adjusted first quantity according to the channel estimating under the current channel circumstance, obtains second quantity.
Wherein, In another embodiment of the present invention; Can further calculate the space character number of TS symbol, the space character number of TS symbol can calculate according to the symbol quantity and second quantity that transmitting element comprises, particularly; The symbol quantity that the space character number of TS symbol can be comprised by transmitting element is divided by second quantity, obtains after the merchant who obtains is rounded.
Reason owing to environment and algorithm realization; Need adjust the quantity of TS symbol, particularly, can adjust first quantity according to the channel estimating loss; Can carry out the emulation assessment to receptivity, the result who assesses according to emulation adjusts first quantity.The receipts Effect on Performance because environment and algorithm achieve a butt joint, second quantity of adjusted TS symbol can greater than or equal or less than first quantity.Under NSR through the emulation of channel estimating performance is thought when TS quantity is 16; Its channel estimating is lost in the tolerance interval; After TS quantity is reduced to 16 by original 26, can improve whole receptivity through protection mode at interval, therefore choosing 16 is second quantity.In like manner, the TS symbolic number that can choose under the HSR is 19.
106, the training sequence symbols of second quantity is inserted transmitting element.
Particularly, in one embodiment of the invention, can be randomly the TS symbol of second quantity be inserted transmitting element.
In another embodiment of the present invention, can confirm the position of training sequence symbols in transmitting element of second quantity earlier; Again the training sequence symbols of second quantity is inserted transmitting element according to the position.
Wherein, In one embodiment of the invention, following mode can be adopted in the position of training sequence symbols in transmitting element of confirming second quantity: confirm the position (first training sequence symbols here only refer to computation sequence on first) of first training sequence symbols in transmitting element; With all the other training sequence symbols except that first training sequence symbols in the training sequence symbols of second quantity, be distributed in the both sides of first training sequence symbols, any two adjacent training sequence symbols symbol quantity at interval is the space character number.
The flow process of the position of training sequence symbols in transmitting element of confirming second quantity that one embodiment of the invention provides is following:
1) confirms symbol quantity N total in the transmitting element.
The transmitting element here refers to the data cell before the IDFT in the PCE transmission flow.The total symbolic number of transmitting element generally comprises effective information symbol, training sequence symbols and the correct additional character of sending of other assurance effective informations, as protecting symbol etc.
2) space character of confirming the TS symbol is counted K.
TS symbol numbers at interval equals the total symbolic number of transmitting element and rounds then and obtain divided by quantity (second quantity) M of TS symbol.Like total symbolic number in a transmitting element is 142, and the TS symbolic number is 16 o'clock, and the space character number K of TS is 8 symbols.
3) confirm the intermediate symbols position of a transmitting element.
When the symbol quantity that comprises at a transmitting element is odd number, the character position in the middle of the character position in centre position is; When the symbol quantity that comprises at transmitting element was even number, the symbol in centre position can be the character position of any symbol in two symbols in the middle of being in.In one embodiment of the invention, the character position that sequence number is bigger in two symbols in the middle of fixedly choosing is as the character position in centre position; In another embodiment of the present invention, the less character position of sequence number is as the character position in centre position in two symbols in the middle of fixedly choosing
Total symbolic number of supposing transmitting element is N, representes the position of each symbol with 0～N-1, and when N was odd number, then the character position in centre position was (N-1)/2; When N was even number, according to sequence number is bigger in two symbols in the middle of choosing the character position principle as the character position in centre position, the character position in centre position was N/2.For example, when N=142, the intermediate symbols position is 71.
4) confirm the position of first TS symbol.
In order to make whole TS symbol in transmitting element, be symmetrically distributed, then the position of first TS symbol just is the intermediate symbols position of transmitting element when the TS symbol numbers is odd number; When the TS symbol numbers was even number, the position of first TS symbol was that the intermediate symbols position of transmitting element adds that the TS space character counts the half the of K.In one embodiment of the invention, the half the of K is K/2 when K is even number; The half the of K is (K-1)/2 when K is odd number.For example, work as N=142, during M=16, K=8, then 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 the TS symbol is uniformly-spaced placed to both sides from first TS character position, the symbol quantity at interval is that space character is counted K between the adjacent TS symbol.
For example, when N=140 or 142 or 144, during 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 the character position of 11 expression TS is the 11st character position in 140 or 142 or 144 character positions that transmitting element comprises, 19 wait other numerals by that analogy.
When N=140 or 142 or 144, during 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 the character position of 8 expression TS is the 8th character position in 140 or 142 or 144 character positions that transmitting element comprises, 13 wait other numerals by that analogy.
When N=168 or 169, during 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 the character position of 12 expression TS is the 12nd character position in 168 or 169 character positions that transmitting element comprises, 20 wait other numerals by that analogy.
When N=168 or 169, during 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 the character position of 9 expression TS is the 9th character position in 168 or 169 character positions that transmitting element comprises, 14 wait other numerals by that analogy.
Wherein, the TS character position can have adjustment slightly owing to may exceed location boundary at the edge.
In one embodiment of the invention, the user of different districts can use identical TS position to carry out the insertion of TS symbol with the inner user of same cells.In another embodiment of the present invention, in order to reduce the interference of minizone, can after having confirmed a basic TS character position, calculate an offset value; Home position with whole TS symbol carries out offset according to deviant again, thereby is staggered in the position of the TS symbol of different districts, reduces the interference between each sub-district.In the one embodiment of the invention; This deviant can (can be CI in the GERAN system according to cell ID; Cell Identity cell ID or CGI, Cell Global Identification--whole world cell identification) and the space character number of TS symbol calculate deviant shift=Mod (CI for example; TS mark space symbolic number K), then the skew after the TS character position be: TSPos
Shift=(TSPos
Base+ shift) Mod N.Through the planning of cell ID, different sub-districts can produce different shift values, and then the TS position of displacement back different districts just can to a certain degree avoid conflict.In an alternative embodiment of the invention, the generation of each sub-district shift value can be the producing method of other random number, rounds like shift=[rand (0, K)].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 second quantity; Because need be at some TS character position continuous distribution TS symbol; Therefore need on X basis, accelerate, the quantity of increase is confirmed by the TS symbol that needs continuous distribution; For example only need be at 2 TS symbols of 1 position continuous distribution, the quantity of the TS symbol that then in transmitting element, inserts is X+1.At this moment, following mode can be adopted in the position of training sequence symbols in transmitting element of confirming second quantity: confirm the position of first training sequence symbols in transmitting element; With all the other training sequence symbols except that first training sequence symbols in the training sequence symbols of 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 second quantity, further insert at least one training sequence symbols.After the TS symbol placed continuously, the channel information of continuous placement TS symbol averaged can obtain more precise channels information, thereby channel estimating is more optimized.
In the embodiment of the invention, the TS symbol that inserts transmitting element can adopt following several kinds of modes to obtain:
1) intercepting obtains from existing TS sequence.
For example, under the NSR situation, consider the circulation symmetrical feature of existing TS symbol, can select former every group leader is that middle 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, second quantity can be 16.
Under the HSR situation, can directly select former every group leader is the second middle number of symbols of 31 TS symbols.In the for example existing GERAN system under the NSR TS sequence have 8 groups, as shown in table 1.
Table 1
| Group number | The 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 the existing GERAN system under the HSR TS sequence have 8 groups, as shown in table 2.
Table 2
| Group number | The 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, the TS sequence of second quantity can intercepting from the TS sequence of table 1 or table 2 description under the NSR.In another embodiment of the present invention, suppose that second quantity is 16 under the NSR, the TS sequence that then intercepting obtains from the TS sequence that table 1 is described is as shown in table 3.
Table 3
| Group number | The 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, the TS sequence of second quantity can intercepting from the TS sequence of table 1 or table 2 description under the HSR.In another embodiment of the present invention, suppose that second quantity is under the HSR at 19 o'clock, the TS sequence that then intercepting obtains from the TS sequence that table 2 is described is as shown in table 4.
Table 4
| Group number | The 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.
Length always has 2 for the binary sequence of M
MKind the combination, from this 2
MAccording to certain selection principle, minimum like the average channel estimation error, the sequence of choosing some (specifically can be 8 groups) is as last TS sequence in the kind combination.
Following mode is adopted in the exhaustive search that one embodiment of the invention provides:
One group of sequence choosing length at first arbitrarily and be M is as consensus sequence;
Adopt the method for full search to select remaining several groups of sequences then, 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 a noise, and F is the DFT matrix, and DFT length one is a fixed matrix regularly, and size is N*N, and A is for sending data matrix, and size also is N*N, F
LThe L that is intercepting front from the F matrix is listed as the matrix that is constituted, and size is N*L, and h is a channel factors, and size is L*1.Wherein, L is the exponent number of channel, and N is the length of DFT.
A is the diagonal matrix of TS symbol in definite position during channel estimation calculation, makes S=F
HAF
L, then evaluated error is expressed as: CE
Error=trace [(S
HS)
-1].
It is 0.5 that one embodiment of the invention is chosen error threshold, and L=5 is that 26 sequence carries out (2 to length
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 | The 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 the table 5 has following characteristic: if any one or more symbol negates in the base standard row, it is consistent that the symbol of remaining 7 groups of sequence correspondence positions also correspondingly carries out after the negate characteristic with this training sequence group itself; Wherein, negate is meant the symbol in the sequence is transformed to-1 by 1, or is transformed to 1 by-1.
In another embodiment of the present invention, the TS sequence of second quantity can intercepting from the TS sequence that table 5 is described under NSR or the HSR.
3) use pseudo random sequence (PN sequence) to produce.
Concrete can select with the generation of Gold sequence, and the Gold sequence can be with a pair of cycle obtains after the m sequence preference identical with speed adds mould 2.On the same group TS symbol is not the Gold sequence of different parameters.
4) use Zadoff-Chu sequence or expansion Zadoff-Chu sequence (the difference circulation version or the basic sequence of a sequence add rotation).On the same group TS symbol can not be that same basic Zadoff-Chu sequence adds that different angle rotations obtains.
From the above; Present embodiment can be confirmed the interval bandwidth between the training sequence symbols according to current channel circumstance; And then confirm second quantity of the needed TS symbol of transmitting element under the current channel circumstance; Thereby only need the TS symbol of needed second quantity under the current channel circumstance be inserted into transmitting element; Improve the service efficiency of TS symbol and improve whole receptivity under the current channel circumstance, in burst, increasing the protection symbol under some channel circumstance condition is provided simultaneously, thereby has further improved whole receptivity.Further, in one embodiment of the invention, can confirm the position of TS symbol in transmitting element of second quantity, make the TS symbol in transmitting element, meet current channel circumstance more, further improve whole receptivity under the current channel circumstance.Further; In one embodiment of the invention, after having confirmed the position of TS symbol in transmitting element of second quantity, deviant that can calculation training sequence symbol position; To be distributed in the training sequence symbols on the both sides of a training sequence symbols again; Carry out offset according to deviant, thereby staggered in the position of the TS symbol of different districts, reduce the interference between each sub-district.Further; In one embodiment of the invention; Can the training sequence symbols on the both sides that are distributed in a training sequence symbols there be at least two training sequence symbols continuous distribution; And then the channel information of continuous placement TS symbol averaged can obtain more precise channels information, thereby channel estimating is more optimized.
Need to prove; For aforesaid each method embodiment, for simple description, so it all is expressed as a series of combination of actions; But those skilled in the art should know; The present invention does not receive 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 the specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
The training sequence symbols that introducing the embodiment of the invention as follows again provides is inserted device, and the structure of the training sequence symbols insertion device that one embodiment of the invention provides is as shown in Figure 3, comprising:
In the another embodiment of the present invention, as shown in Figure 3, inserting unit 303 can comprise: position determination unit 3031 is used for confirming the position of the training sequence symbols of said second quantity at said transmitting element; Symbol inserts unit 3032, is used for said transmitting element is inserted in the position that the training sequence symbols of said second quantity is confirmed according to said position determination unit 3031.
From the above; Present embodiment can be confirmed the interval bandwidth between the training sequence symbols according to current channel circumstance; And then confirm second quantity of the needed TS symbol of transmitting element under the current channel circumstance; Thereby only need the TS symbol of needed second quantity under the current channel circumstance be inserted into transmitting element; Improve the service efficiency of TS symbol and improve whole receptivity under the current channel circumstance, in burst, increasing the protection symbol under some channel circumstance condition is provided simultaneously, thereby has further improved whole receptivity.Further, in one embodiment of the invention, can confirm the position of TS symbol in transmitting element of second quantity, make the TS symbol in transmitting element, meet current channel circumstance more, further improve whole receptivity under the current channel circumstance.
The structure of the training sequence symbols insertion device that another embodiment of the present invention provides is as shown in Figure 4, comprising:
Bandwidth acquiring unit 401 is used to obtain current channel circumstance, calculates the time delay expansion under the said current channel circumstance, calculates the coherence bandwidth of current channel circumstance respective channels according to said time delay expansion; Confirm the interval bandwidth between the training sequence symbols, said interval bandwidth is less than said coherence bandwidth;
Computing unit 402 is used to use interval bandwidth that said bandwidth acquiring unit obtains and first quantity of transmitting element bandwidth calculation training sequence symbols; Loss is adjusted said first quantity according to the channel estimating under the said current channel circumstance, obtains second quantity; The space character number of the interval bandwidth calculation TS symbol that obtains according to bandwidth acquiring unit 401;
Insert unit 403, the training sequence symbols of second quantity that is used for said computing unit is calculated is inserted the transmitting element under the said current channel circumstance.
In the another embodiment of the present invention, as shown in Figure 4, inserting unit 403 can comprise: position determination unit 4031 is used for confirming the position of the training sequence symbols of said second quantity at said transmitting element; Symbol inserts unit 4032, is used for said transmitting element is inserted in the position that the training sequence symbols of said second quantity is confirmed according to said position determination unit 4031.
In the another embodiment of the present invention, as shown in Figure 4, position determination unit 4031 comprises: first character position is confirmed unit 40311, is used for confirming the position of first training sequence symbols at transmitting element; Second character position is confirmed unit 40312; Be used for training sequence symbols all the other training sequence symbols except that a training sequence symbols with second quantity; Be distributed in the both sides of a training sequence symbols, any two adjacent training sequence symbols symbol quantity at interval is the space character number.
From the above; Present embodiment can be confirmed the interval bandwidth between the training sequence symbols according to current channel circumstance; And then confirm second quantity of the needed TS symbol of transmitting element under the current channel circumstance; Thereby only need the TS symbol of needed second quantity under the current channel circumstance be inserted into transmitting element; Improve the service efficiency of TS symbol and improve whole receptivity under the current channel circumstance, in burst, increasing the protection symbol under some channel circumstance condition is provided simultaneously, thereby has further improved whole receptivity.Further, can confirm the position of TS symbol in transmitting element of second quantity, make the TS symbol in transmitting element, meet current channel circumstance more, further improve whole receptivity under the current channel circumstance.
The structure of the training sequence symbols insertion device that another embodiment of the present invention provides is as shown in Figure 5, comprising:
In the another embodiment of the present invention, as shown in Figure 5, inserting unit 503 can comprise: position determination unit 5031 is used for confirming the position of the training sequence symbols of said second quantity at said transmitting element; Symbol inserts unit 5032, is used for said transmitting element is inserted in the position that the training sequence symbols of said second quantity is confirmed according to said position determination unit 5031.
In the another embodiment of the present invention, as shown in Figure 5, position determination unit 5031 comprises: first character position is confirmed unit 50311, is used for confirming the position of first training sequence symbols at transmitting element.Second character position is confirmed unit 50312; Be used for training sequence symbols all the other training sequence symbols except that first training sequence symbols with second quantity; Be distributed in the both sides of first training sequence symbols, any two adjacent training sequence symbols symbol quantity at interval is the space character number.Deviant computing unit 50313 is used for the deviant of calculation training sequence symbol position.Character position is confirmed unit 50312, also is used for the training sequence symbols with second quantity, carries out offset according to the deviant that deviant computing unit 50313 calculates.
From the above; Present embodiment can be confirmed the interval bandwidth between the training sequence symbols according to current channel circumstance; And then confirm second quantity of the needed TS symbol of transmitting element under the current channel circumstance; Thereby only need the TS symbol of needed second quantity under the current channel circumstance be inserted into transmitting element; Improve the service efficiency of TS symbol and improve whole receptivity under the current channel circumstance, in burst, increasing the protection symbol under some channel circumstance condition is provided simultaneously, thereby has further improved whole receptivity.Further, can confirm the position of TS symbol in transmitting element of second quantity, make the TS symbol in transmitting element, meet current channel circumstance more, further improve whole receptivity under the current channel circumstance.Further; After having confirmed the position of TS symbol in transmitting element of second quantity; Deviant that can calculation training sequence symbol position will be distributed in the training sequence symbols on the both sides of a training sequence symbols again, carry out offset according to deviant; Thereby staggered in the position of the TS symbol of different districts, reduce the interference between each sub-district.
The structure of the training sequence symbols insertion device that another embodiment of the present invention provides is as shown in Figure 6, comprising:
In the another embodiment of the present invention, as shown in Figure 6, inserting unit 603 can comprise: position determination unit 6031 is used for confirming the position of the training sequence symbols of said second quantity at said transmitting element; Symbol inserts unit 6032, is used for said transmitting element is inserted in the position that the training sequence symbols of said second quantity is confirmed according to said position determination unit 6031.
In the another embodiment of the present invention, as shown in Figure 6, position determination unit 6031 comprises: the 3rd character position is confirmed unit 60311, is used for confirming the position of first training sequence symbols at transmitting element.The 4th character position is confirmed unit 60312, is used for training sequence symbols all the other training sequence symbols except that first training sequence symbols with 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 second quantity, further insert at least one training sequence symbols, discontinuously arranged arbitrarily adjacent training sequence symbols symbol quantity at interval is the space character number.
From the above; Present embodiment can be confirmed the interval bandwidth between the training sequence symbols according to current channel circumstance; And then confirm second quantity of the needed TS symbol of transmitting element under the current channel circumstance; Thereby only need the TS symbol of needed second quantity under the current channel circumstance be inserted into transmitting element; Improve the service efficiency of TS symbol and improve whole receptivity under the current channel circumstance, in burst, increasing the protection symbol under some channel circumstance condition is provided simultaneously, thereby has further improved whole receptivity.In one embodiment of the invention, can confirm the position of TS symbol in transmitting element of second quantity, make the TS symbol in transmitting element, meet current channel circumstance more, further improve whole receptivity under the current channel circumstance.Further; Can the training sequence symbols on the both sides that are distributed in a training sequence symbols there be at least two training sequence symbols continuous distribution; And then the channel information of continuous placement TS symbol averaged can obtain more precise channels 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 device that the embodiment of the invention provides.
Contents such as the information interaction between said apparatus and intrasystem each module, implementation and since with the inventive method embodiment based on same design, particular content can repeat no more referring to the narration among the inventive method embodiment here.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method; Be to instruct relevant hardware to accomplish through computer program; Above-mentioned program can be stored in the computer read/write memory medium; This program can comprise the flow process like the embodiment of above-mentioned each side method when carrying out.Wherein, above-mentioned storage medium can be magnetic disc, CD, read-only storage memory body (ROM:Read-Only Memory) or stores memory body (RAM:Random Access Memory) etc. at random.
Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (20)
1. a training sequence symbols insertion method is characterized in that, comprising:
Obtain current channel circumstance, calculate the time delay expansion under the said current channel circumstance, calculate the coherence bandwidth of current channel circumstance respective channels according to said time delay expansion;
Confirm the interval bandwidth between the training sequence symbols, said interval bandwidth is less than said coherence bandwidth;
Use first quantity of required training sequence symbols in said interval bandwidth and the said transmitting element of transmitting element bandwidth calculation;
Loss is adjusted said first quantity according to the channel estimating under the said current channel circumstance, obtains second quantity;
The training sequence symbols of said second quantity is inserted transmitting element.
2. training sequence symbols insertion method as claimed in claim 1 is characterized in that, said training sequence symbols with said second quantity is inserted transmitting element and comprised:
Confirm the position of training sequence symbols in said transmitting element of said second quantity;
The training sequence symbols of said second quantity is inserted said transmitting element according to said position.
3. training sequence symbols insertion method as claimed in claim 2 is characterized in that, obtains further to comprise after second quantity:
The symbol quantity that comprises according to said transmitting element and the space character number of the said second quantity calculation training sequence symbol.
4. training sequence symbols insertion method as claimed in claim 3 is characterized in that, the position of training sequence symbols in said transmitting element of said definite said second quantity comprises:
Confirm the position of first training sequence symbols in said transmitting element;
With all the other training sequence symbols except that said first training sequence symbols in the training sequence symbols of said second quantity; Be distributed in the both sides of said first training sequence symbols, any two adjacent training sequence symbols symbol quantity at interval is said space character number.
5. training sequence symbols insertion method as claimed in claim 4 is characterized in that, confirms further to comprise behind the position of training sequence symbols in said transmitting element of said second quantity:
The deviant of calculation training sequence symbol position;
With the training sequence symbols of said second quantity, carry out offset according to said deviant.
6. training sequence symbols insertion method as claimed in claim 3 is characterized in that, the position of training sequence symbols in said transmitting element of said definite said second quantity comprises:
Confirm the position of first training sequence symbols in said transmitting element;
With all the other training sequence symbols except that a said training sequence symbols in the training sequence symbols of said second quantity, be distributed in the both sides of a said training sequence symbols; In the adjacent-symbol position of at least one training sequence symbols of the training sequence symbols of said 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 said transmitting element comprises is 140 or 142 or 144, and said second quantity is 16, and the space character number of said training sequence symbols is 8;
16 positions of training sequence symbols in 140 or 142 or 144 included character positions of said transmitting element are 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, said 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 said transmitting element comprises is 168 or 169, and said second quantity is 19, and the space character number of said training sequence symbols is 8;
The position of said 19 training sequence symbols in 168 or 169 included character positions of said 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, said 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 method as claimed in claim 3 is characterized in that, the symbol quantity that said transmitting element comprises is 140 or 142 or 144, and said second quantity is 26, and the space character number of said training sequence symbols is 5;
16 positions of training sequence symbols in 140 or 142 or 144 included character positions of said transmitting element are 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 method as claimed in claim 11 is characterized in that, said 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 method as claimed in claim 3 is characterized in that, the symbol quantity that said transmitting element comprises is 168 or 169, and said second quantity is 31, and the space character number of said training sequence symbols is 5;
The position of said 31 training sequence symbols in 168 or 169 included character positions of said 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. like the arbitrary described training sequence symbols insertion method of claim 1 to 6, it is characterized in that, the training sequence symbols of said 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
Intercepting 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.
15. a training sequence symbols is inserted device, it is characterized in that, comprising:
The bandwidth acquiring unit is used to obtain current channel circumstance, calculates the time delay expansion under the said current channel circumstance, calculates the coherence bandwidth of current channel circumstance respective channels according to said time delay expansion; Confirm the interval bandwidth between the training sequence symbols, said interval bandwidth is less than said coherence bandwidth;
Computing unit is used to use interval bandwidth that said bandwidth acquiring unit obtains and first quantity of transmitting element bandwidth calculation training sequence symbols; Loss is adjusted said first quantity according to the channel estimating under the said current channel circumstance, obtains second quantity;
Insert the unit, the training sequence symbols of second quantity that is used for said computing unit is calculated is inserted transmitting element.
16. training sequence symbols as claimed in claim 15 is inserted device, it is characterized in that said insertion unit comprises:
Position determination unit is used for confirming the position of the training sequence symbols of said second quantity at said transmitting element;
Symbol inserts the unit, is used for said transmitting element is inserted in the position that the training sequence symbols of said second quantity is confirmed according to said position determination unit.
17. training sequence symbols as claimed in claim 16 is inserted device, it is characterized in that the space character number of the interval bandwidth calculation TS symbol that said computing unit also is used for obtaining according to said bandwidth acquiring unit;
Said position determination unit comprises:
First character position is confirmed the unit, is used for confirming the position of first training sequence symbols at said transmitting element;
Second character position is confirmed the unit; Be used for training sequence symbols all the other training sequence symbols except that said first training sequence symbols with said second quantity; Be distributed in the both sides of said first training sequence symbols, any two adjacent training sequence symbols symbol quantity at interval is said space character number.
18. insert device like claim 16 or 17 described training sequence symbols, it is characterized in that said position determination unit also comprises:
The deviant computing unit is used for the deviant of calculation training sequence symbol position;
Said character position is confirmed the unit, also is used for the training sequence symbols with said second quantity, carries out offset according to the deviant that said deviant computing unit calculates.
19. training sequence symbols as claimed in claim 16 is inserted device, it is characterized in that the space character number of the interval bandwidth calculation TS symbol that said computing unit also is used for obtaining according to said bandwidth acquiring unit;
Said position determination unit comprises:
The 3rd character position is confirmed the unit, is used for confirming the position of a low training sequence symbols at said transmitting element;
The 4th character position is confirmed the unit, is used for training sequence symbols all the other training sequence symbols except that a said training sequence symbols with said second quantity, is distributed in the both sides of a said training sequence symbols; In the adjacent-symbol position of at least one training sequence symbols of the training sequence symbols of said second quantity, further insert at least one training sequence symbols, the discontinuously arranged arbitrarily adjacent training sequence symbols said space character number of sign digit at interval.
20. a communication system is characterized in that, comprises like the arbitrary described training sequence symbols of claim 15 to 19 inserting device.
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)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102377704A true CN102377704A (en) | 2012-03-14 |
| CN102377704B CN102377704B (en) | 2014-06-04 |
Family
ID=44903624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010268991.3A Active CN102377704B (en) | 2010-08-24 | 2010-08-24 | Training sequence symbol insertion method and device as well as communication system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102377704B (en) |
| WO (1) | WO2011137857A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431640A (en) * | 2020-04-17 | 2020-07-17 | 哈尔滨海能达科技有限公司 | Signal transmission method, device and system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2509088A (en) * | 2012-12-19 | 2014-06-25 | Broadcom Corp | A reference sequence for synchronisation and channel estimation in local area communication scenarios |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2010
- 2010-08-24 CN CN201010268991.3A patent/CN102377704B/en active Active
-
2011
- 2011-05-31 WO PCT/CN2011/075060 patent/WO2011137857A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431640A (en) * | 2020-04-17 | 2020-07-17 | 哈尔滨海能达科技有限公司 | Signal transmission method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011137857A1 (en) | 2011-11-10 |
| CN102377704B (en) | 2014-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9935808B2 (en) | Method for determining reserved tones and transmitter for performing PAPR reduction using tone reservation | |
| CN101796789B (en) | Method of generating reference signal in wireless communication system | |
| US11601316B2 (en) | Method for determining reserved tones and transmitter for performing PAPR reduction using tone reservation | |
| CN101641925B (en) | Method for setting cyclic shift considering frequency offset | |
| CN108306841B (en) | Signal design method and system for OFDM communication, transmitter and receiver | |
| CN107231690B (en) | Information sending method and device | |
| JP5486734B2 (en) | Transmission signal generating apparatus and method in single carrier communication system | |
| CN101632247B (en) | A code division multiplexing method and system | |
| CN102904607A (en) | User device, sending method, communication system, base station and receive method | |
| EP2202933B1 (en) | Technique for generating an sc-fdma signal | |
| CN101772934A (en) | Base station device, mobile station device, communication system, and communication method | |
| CN102640530A (en) | Wireless base station | |
| CN111510412A (en) | Data modulation method, device and equipment | |
| US20160365996A1 (en) | Method for determining reserved tones and transmitter for performing papr reduction using tone reservation | |
| Wan et al. | Bit error probability of OFDM system over frequency nonselective fast Rayleigh fading channels | |
| CN102377704B (en) | Training sequence symbol insertion method and device as well as communication system | |
| CN114600431A (en) | Method and apparatus for symbol processing | |
| CN112187690B (en) | Method and device for processing symbols | |
| JP2023027402A (en) | Generating sequences for reference signals | |
| CN112152958B (en) | Phase estimation method and device based on sparse scattered pilot frequency in OFDM system | |
| CN101227697B (en) | Pilot frequency design method based on pilot signal assistance | |
| CN112187682B (en) | Method and device for processing symbols | |
| CN110299980B (en) | Method, device and system for transmitting reference signal | |
| CN102025393B (en) | Data transmission method and device | |
| CN103684722A (en) | Power distribution method for uplink sounding reference signals (SRSs), power distribution method for SRSs, and signal processing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |