CN106302284A - A kind of method and apparatus carrying out frequency deviation estimation - Google Patents

Abstract

The present embodiments relate to wireless communication technology field, particularly to a kind of method and apparatus carrying out frequency deviation estimation, in order to carry out frequency deviation estimation under high-speed mobile environment.The corresponding short symbol of multiple first kind of the first kind frequency pilot sign of the embodiment of the present invention, short for first kind symbol is sent to reception equipment by transmission equipment；Reception equipment carries out frequency deviation estimation according to the short symbol of the first kind.Middle reception equipment directly carries out the mode of frequency deviation estimation according to first kind frequency pilot sign, the embodiment of the present invention carries out frequency deviation estimation owing to using the short symbol of the first kind, it is thus possible to improve the detection performance of signal, it is possible to the frequency deviation preferably adapted under high-speed mobile environment estimates requirement.

Description

A kind of method and apparatus carrying out frequency deviation estimation

Technical field

The present invention relates to wireless communication technology field, particularly to a kind of method carrying out frequency deviation estimation with set Standby.

Background technology

In LTE (Long Term Evolution, Long Term Evolution) system, take is that network concentrates control The mode of system, i.e. the up-downgoing data of UE (subscriber equipment) are transmitted the most under the control of a network and connect Receive.Communication between UE and UE, is forwarded by network and controls.Do not deposit between UE and UE At direct communication link, UE does not the most allow to send upstream data voluntarily, sees Figure 1A.

D2D (Device-to-Device, device-to-device), i.e. subscriber equipment leads directly to technology, refers to neighbouring Subscriber equipment can in short range by the way of direct connected link carries out data transmission, it is not necessary to logical Cross Centroid (i.e. base station) to forward, as shown in Figure 1B.

In 3GPP (3rd Generation Partnership Project, 3G (Third Generation) Moblie standardization body), D2D includes following two big classes close to service:

D2D finds: UE uses E-UTRA to confirm that another one UE is in its vicinity.Such as, D2D UE can use this service to carry out the taxi of finding nearby, find friend etc. in its vicinity；

D2D communicates: UE close to each other, by directly setting up link between two UE, so will Originally the communication link transmitted by network is converted into the DCL of this locality, saves substantial amounts of bandwidth And network efficiency；Or two UE close to each other, it is possible to use direct link communication obtains stable height The communication service that speed is cheap.Usually carry out under network controls or auxiliary close to communication for service, ENB (evolution base station) possibly even can be for carry out the dynamic Resources allocation of UE close to communication for service.

D2D communicates and is divided into two kinds of Linktypes at present:

D2D link: refer to the link directly communicated between equipment and equipment；

D2N link: the link communicated between equipment and network node.

Participate in D2D find/UE of communication is divided into two kinds of roles:

D2D sends UE: i.e. send the UE of D2D discovery/communication information；

D2D receives UE: i.e. receives D2D and sends the UE of discovery/communication information that UE sends.

In the D2D of 3GPP, data acquisition SC-FDMA modulation system.The BTU of data TTI (Transmission Time Interval, transmission time interval) is 1ms, conventional CP (Cyclic Prefix, Cyclic Prefix) under comprise 14 symbols, wherein symbol 4 and 11 is used for carrying demodulation pilot tone, symbol 14 As GP (protection interval).

At present, the operative scenario of the D2D of 3GPP is mainly low speed environments, does not consider high-speed mobile ring Need under border.

Under high-speed mobile environment, it is assumed that be 5.9GHz in carrier frequency, crystal oscillator degree of stability is 0.1ppm, When bicycle maximum translational speed is 160km/h, the maximum Doppler frequency shift relatively of two cars is 2.9KHz, uses It is not to be exceeded 171us in the time interval estimated between two row pilot tones of this frequency deviation.And 3 intersymbol times Interval is 214us, and 2 intersymbol time intervals are 143us.

In sum, there is presently no a kind of for the scheme carrying out frequency deviation estimation under high-speed mobile environment.

Summary of the invention

The present invention provides a kind of method and apparatus carrying out frequency deviation estimation, in order to carry out under high-speed mobile environment Frequency deviation is estimated.

A kind of method carrying out frequency deviation estimation that the embodiment of the present invention provides, the method includes:

Transmitting terminal determines the short symbol of each first kind that first kind frequency pilot sign is corresponding；

For once transmitting, described transmitting terminal selects a first kind short from all short symbols of the described first kind Symbol；

Described transmitting terminal, according to transmission location corresponding to described first kind frequency pilot sign, sends the first kind selected Short symbol, so that receiving terminal carries out frequency deviation estimation according to the short symbol of the described first kind.

Optionally, described transmitting terminal determines, according to following manner, the transmission position that described first kind frequency pilot sign is corresponding Put:

Described transmitting terminal is corresponding as described first kind frequency pilot sign using at least one symbol in same subframe Transmission location.

Optionally, at least one symbol in described same subframe includes the 6th symbol and the 11st symbol； Or

At least one symbol in described same subframe includes the 3rd symbol, the 7th symbol and the 11st Symbol；Or

At least one symbol in described same subframe includes the 3rd symbol, the 6th symbol, the 9th symbol Number and the 12nd symbol.

Optionally, described transmitting terminal determines the short symbol of each first kind that first kind frequency pilot sign is corresponding, including:

Described transmitting terminal determines each first kind short code that described first kind frequency pilot sign is corresponding；

For a first kind short code, described transmitting terminal, according to this first kind short code, generates the short symbol of the first kind.

Optionally, described first kind frequency pilot sign correspondence S group short code, often group short code includes that R the first kind is short Code；Or

Described first kind frequency pilot sign includes R first kind short code；

Wherein, S and R is positive integer.

Optionally, described transmitting terminal sends the short symbol of the first kind selected, and also includes:

Described transmitting terminal determines the scrambler that the short symbol of the described first kind of selection is corresponding；

The data sent together with the scrambler pair that described transmitting terminal is determined by symbol short with the described first kind are carried out Scrambling.

Optionally, the method also includes:

Described transmitting terminal determines the short symbol of each Equations of The Second Kind that Equations of The Second Kind frequency pilot sign is corresponding；

For once transmitting, described transmitting terminal selects an Equations of The Second Kind short from all short symbols of described Equations of The Second Kind Symbol；

Described transmitting terminal, according to transmission location corresponding to described Equations of The Second Kind frequency pilot sign, sends the Equations of The Second Kind selected Short symbol, so that receiving terminal carries out automatic growth control according to the short symbol of described Equations of The Second Kind.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 1st symbol in subframe.

Optionally, the method also includes:

Described transmitting terminal determines each 3rd short symbol of class that the 3rd class frequency pilot sign is corresponding；

For once transmitting, described transmitting terminal selects the 3rd class short from all described 3rd short symbols of class Symbol；

Described transmitting terminal, according to transmission location corresponding to described 3rd class frequency pilot sign, sends the 3rd class selected Short symbol, so that receiving terminal carries out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 2nd symbol in subframe.

Optionally, described transmitting terminal determines each 3rd short symbol of class that the 3rd class frequency pilot sign is corresponding, including:

Described transmitting terminal determines each 3rd class short code that described 3rd class frequency pilot sign is corresponding；

For a 3rd class short code, described transmitting terminal, according to the 3rd class short code, generates the 3rd short symbol of class.

Optionally, any two the 3rd class short code cross correlation value that described 3rd class frequency pilot sign is corresponding is less than setting Determine threshold value；Or

Each 3rd class short code in described 3rd class frequency pilot sign is that different time based on same sequence is inclined Shifting obtains.

A kind of method carrying out frequency deviation estimation that the embodiment of the present invention provides, the method includes:

Receiving terminal receives the short symbol of the first kind from transmitting terminal, and the short symbol of the wherein said first kind is described Sending end selects from the short symbol of all first kind that first kind frequency pilot sign is corresponding；

Described receiving terminal carries out frequency deviation estimation according to the short symbol of the described first kind.

Optionally, described receiving terminal receives the short symbol of the first kind from transmitting terminal, including:

Described receiving terminal, according at least one symbol of the carrying short symbol of the first kind in subframe, receives from transmission The short symbol of the first kind of end.

Optionally, at least one symbol described includes the 6th symbol in subframe and the 11st symbol；Or

At least one symbol described includes the 3rd symbol in subframe, the 7th symbol and the 11st symbol； Or

At least one symbol described include the 3rd symbol in subframe, the 6th symbol, the 9th symbol and 12nd symbol.

Optionally, described receiving terminal received before the short symbol of the first kind of transmitting terminal, also included:

Described receiving terminal receives the short symbol of Equations of The Second Kind from transmitting terminal, and the short symbol of wherein said Equations of The Second Kind is institute State what transmitting terminal selected from the short symbol of all Equations of The Second Kinds that Equations of The Second Kind frequency pilot sign is corresponding；

The method also includes:

Described receiving terminal carries out automatic growth control according to the short symbol of described Equations of The Second Kind.

Optionally, described receiving terminal received before the short symbol of the first kind of transmitting terminal, also included:

Described receiving terminal receives the 3rd short symbol of class from transmitting terminal, and the wherein said 3rd short symbol of class is institute State what transmitting terminal selected from all 3rd short symbols of class that the 3rd class frequency pilot sign is corresponding；

The method also includes:

Described receiving terminal carries out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

Optionally, described receiving terminal receives after the short symbol of the first kind of transmitting terminal, also includes:

Described receiving terminal determines group sequence number, the group that wherein said group of sequence number is corresponding according to the described 3rd short symbol of class Include that the first kind short code that described first kind frequency pilot sign is corresponding, described first kind short code are used for generating described The short symbol of the first kind；

First kind short code in group corresponding with group sequence number for the data of reception is carried out time domain phase by described receiving terminal Close, determine and generate the first kind short code that the short symbol of the described first kind received uses.

A kind of transmission equipment carrying out frequency deviation estimation that the embodiment of the present invention provides, this transmission equipment includes:

Determine module, for determining the short symbol of each first kind that first kind frequency pilot sign is corresponding；

Selecting module, for for once transmitting, described transmitting terminal selects from all short symbols of the described first kind Select a short symbol of the first kind；

Sending module, for according to transmission location corresponding to described first kind frequency pilot sign, sends the selected The one short symbol of class, so that receiving terminal carries out frequency deviation estimation according to the short symbol of the described first kind.

Optionally, described sending module is additionally operable to, and determines described first kind frequency pilot sign pair according to following manner The transmission location answered:

Using at least one symbol in same subframe as transmission location corresponding to described first kind frequency pilot sign.

Optionally, at least one symbol in described same subframe includes the 6th symbol and the 11st symbol； Or

At least one symbol in described same subframe includes the 3rd symbol, the 7th symbol and the 11st Symbol；Or

At least one symbol in described same subframe includes the 3rd symbol, the 6th symbol, the 9th symbol Number and the 12nd symbol.

Optionally, described determine module specifically for:

Determine each first kind short code that described first kind frequency pilot sign is corresponding；For a first kind short code, According to this first kind short code, generate the short symbol of the first kind.

Optionally, described first kind frequency pilot sign correspondence S group short code, often group short code includes that R the first kind is short Code；Or

Described first kind frequency pilot sign includes R first kind short code；

Wherein, S and R is positive integer.

Optionally, described sending module is additionally operable to:

Determine the scrambler that the short symbol of the described first kind of selection is corresponding；The scrambler pair being determined by and described first The data that the short symbol of class sends together scramble.

Optionally, described determine that module is additionally operable to:

Determine the short symbol of each Equations of The Second Kind that Equations of The Second Kind frequency pilot sign is corresponding；

Described selection module is additionally operable to:

For once transmitting, described transmitting terminal selects an Equations of The Second Kind short from all short symbols of described Equations of The Second Kind Symbol；

Described sending module is additionally operable to:

According to the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding, send the short symbol of Equations of The Second Kind selected, with Receiving terminal is made to carry out automatic growth control according to the short symbol of described Equations of The Second Kind.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 1st symbol in subframe.

Optionally, described determine that module is additionally operable to:

Determine each 3rd short symbol of class that the 3rd class frequency pilot sign is corresponding；

Described selection module is additionally operable to:

For once transmitting, from all described 3rd short symbols of class, select a 3rd short symbol of class；

Described sending module is additionally operable to:

According to the transmission location that described 3rd class frequency pilot sign is corresponding, send the 3rd short symbol of class selected, with Receiving terminal is made to carry out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 2nd symbol in subframe.

Optionally, described determine module specifically for:

Determine each 3rd class short code that described 3rd class frequency pilot sign is corresponding；For a 3rd class short code, According to the 3rd class short code, generate the 3rd short symbol of class.

Optionally, any two the 3rd class short code cross correlation value that described 3rd class frequency pilot sign is corresponding is less than setting Determine threshold value；Or

Each 3rd class short code in described 3rd class frequency pilot sign is that different time based on same sequence is inclined Shifting obtains.

A kind of reception equipment carrying out frequency deviation estimation that the embodiment of the present invention provides, this reception equipment includes:

Receiver module, for receiving the short symbol of the first kind from transmitting terminal, the short symbol of the wherein said first kind It is that described transmitting terminal selects from the short symbol of all first kind that first kind frequency pilot sign is corresponding；

Processing module, for carrying out frequency deviation estimation according to the short symbol of the described first kind.

Optionally, described receiver module specifically for:

According at least one symbol of the carrying short symbol of the first kind in subframe, receive the first kind from transmitting terminal Short symbol.

Optionally, at least one symbol described includes the 6th symbol in subframe and the 11st symbol；Or

At least one symbol described includes the 3rd symbol in subframe, the 7th symbol and the 11st symbol； Or

At least one symbol described include the 3rd symbol in subframe, the 6th symbol, the 9th symbol and 12nd symbol.

Optionally, described receiver module is additionally operable to:

Receive before the short symbol of the first kind of transmitting terminal, receive the short symbol of Equations of The Second Kind from transmitting terminal, The short symbol of wherein said Equations of The Second Kind is that described transmitting terminal is short from all Equations of The Second Kinds that Equations of The Second Kind frequency pilot sign is corresponding Symbol selects；

Described processing module is additionally operable to:

Automatic growth control is carried out according to the short symbol of described Equations of The Second Kind.

Optionally, described receiver module is additionally operable to:

Receive before the short symbol of the first kind of transmitting terminal, receive the 3rd short symbol of class from transmitting terminal, The wherein said 3rd short symbol of class is that described transmitting terminal is short from all 3rd classes that the 3rd class frequency pilot sign is corresponding Symbol selects；

Described processing module is additionally operable to:

Time synchronized and frequency offset correction is carried out according to the described 3rd short symbol of class.

Optionally, described processing module is additionally operable to:

Determining group sequence number according to the described 3rd short symbol of class, group corresponding to wherein said group of sequence number includes described The first kind short code that first kind frequency pilot sign is corresponding, described first kind short code is used for generating the short symbol of the described first kind Number；First kind short code in group corresponding to group sequence number for the data of reception is carried out time domain relevant, determine generation The first kind short code that the short symbol of the described first kind received uses.

The corresponding short symbol of multiple first kind of the first kind frequency pilot sign of the embodiment of the present invention, the equipment that sends is by first The short symbol of class is sent to reception equipment；Reception equipment carries out frequency deviation estimation according to the short symbol of the first kind.Compare existing The equipment that receives is had in technology directly to carry out the mode of frequency deviation estimation, present invention enforcement according to first kind frequency pilot sign Example carries out frequency deviation estimation owing to using the short symbol of the first kind such that it is able to improve the detection performance of signal, it is possible to The frequency deviation preferably adapted under high-speed mobile environment estimates requirement.

Accompanying drawing explanation

Figure 1A is the schematic diagram data of subscriber equipment communication in background technology cellular network；

Figure 1B is the schematic diagram data of the direct-connected communication of background technology subscriber equipment；

Fig. 2 is the system structure schematic diagram that the embodiment of the present invention carries out frequency deviation estimation；

Fig. 3 is the first D2D data burst structural representation of the embodiment of the present invention；

Fig. 4 is the first data cutout window schematic diagram of the embodiment of the present invention；

Fig. 5 is embodiment of the present invention the second data cutout window schematic diagram；

Fig. 6 is embodiment of the present invention the second D2D data burst structural representation；

Fig. 7 is the third D2D data burst structural representation of the embodiment of the present invention；

Fig. 8 is the 4th kind of D2D data burst structural representation of the embodiment of the present invention；

Fig. 9 is the 5th kind of D2D data burst structural representation of the embodiment of the present invention；

Figure 10 is the 6th kind of D2D data burst structural representation of the embodiment of the present invention；

Figure 11 is the structural representation of the first transmission equipment of the embodiment of the present invention；

Figure 12 is the structural representation of the first reception equipment of the embodiment of the present invention；

Figure 13 is the structural representation that embodiment of the present invention the second sends equipment；

Figure 14 is the structural representation that embodiment of the present invention the second receives equipment；

Figure 15 is a kind of method flow schematic diagram carrying out frequency deviation estimation of the embodiment of the present invention；

Figure 16 is the method flow schematic diagram that embodiment of the present invention another kind carries out frequency deviation estimation.

Detailed description of the invention

The corresponding short symbol of multiple first kind of the first kind frequency pilot sign of the embodiment of the present invention, the equipment that sends is by first The short symbol of class is sent to reception equipment；Reception equipment carries out frequency deviation estimation according to the short symbol of the first kind.Compare existing The equipment that receives is had in technology directly to carry out the mode of frequency deviation estimation, present invention enforcement according to first kind frequency pilot sign Example carries out frequency deviation estimation owing to using the short symbol of the first kind such that it is able to improve the detection performance of signal, it is possible to The frequency deviation preferably adapted under high-speed mobile environment estimates requirement.

Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.

As in figure 2 it is shown, the system that the embodiment of the present invention carries out frequency deviation estimation includes:

Transmission equipment 10, for determining the short symbol of each first kind that first kind frequency pilot sign is corresponding；For one Secondary transmission, selects a short symbol of the first kind from all short symbols of the described first kind；According to the described first kind The transmission location that frequency pilot sign is corresponding, sends the short symbol of the first kind selected；

Reception equipment 20, for receiving the short symbol of the first kind from transmitting terminal, the short symbol of the wherein said first kind Number it is that described transmitting terminal selects from the short symbol of all first kind that first kind frequency pilot sign is corresponding；According to institute State the short symbol of the first kind and carry out frequency deviation estimation.

Wherein, described transmitting terminal determines each first kind short code that described first kind frequency pilot sign is corresponding；

For a first kind short code, described transmitting terminal, according to this first kind short code, generates the short symbol of the first kind.

Concrete, the first kind short code length in embodiment of the present invention first kind frequency pilot sign is equal to number in subframe K/1 according to subcarrier shared by symbol (the PUSCH symbol of such as LTE).

The first kind short code of the embodiment of the present invention can use zadoff-chu sequence construct, it would however also be possible to employ M Sequence or other sequence constructs.

Concrete building mode may refer to 3GPP TS 36.211 agreement, does not repeats them here.

After obtaining first kind short code, shared by each element equally spaced write subframe in first kind short code Subcarrier (subcarrier used equal to data symbol), be spaced apart K, and make W point IFFT fortune Calculate and obtain the first kind short code short symbol of the corresponding first kind.

First kind short code is repeated K time, adds the Cyclic Prefix of a length of L (i), just constitute the first kind and lead Frequency symbol.

Such as K=4, W=1024, L (1)=1104.

Ta (1)=STa (4,177) ..., STa (4,256), STa (1), STa (2), STa (3), STa (4), this In STa (i)=STa.

Wherein, m-th Tx during Tx (m) refers to subframe；Tx represents the symbol of type x, such as first Class symbol, x is 1；(m n) refers to the nth elements of m-th Tx in subframe to Tx.The different value table of i Show different time-domain positions, or numbering.

The embodiment of the present invention only can use first kind frequency pilot sign during carrying out frequency deviation estimation, it is also possible to Other frequency pilot signs are carried out together, are introduced separately below.

Scheme one, carry out frequency deviation estimation during relate to first kind frequency pilot sign and other frequency pilot signs.

Other frequency pilot signs of the embodiment of the present invention, including Equations of The Second Kind frequency pilot sign and the 3rd class frequency pilot sign.

For Equations of The Second Kind frequency pilot sign, described transmission equipment determines each second that Equations of The Second Kind frequency pilot sign is corresponding The short symbol of class；

For once transmitting, described transmission equipment selects an Equations of The Second Kind from all short symbols of described Equations of The Second Kind Short symbol；According to the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding, send the short symbol of Equations of The Second Kind selected, So that receiving terminal carries out automatic growth control according to the short symbol of described Equations of The Second Kind.

Accordingly, the equipment that receives is according to Equations of The Second Kind frequency pilot sign automatic growth control.

The short symbol of Equations of The Second Kind is except being used for carrying out automatic growth control, it is also possible to carry out rough grade for auxiliary Synchronize or the frequency deviation of rough grade is estimated.

In force, described transmitting terminal determines each Equations of The Second Kind short code that described Equations of The Second Kind frequency pilot sign is corresponding；

For an Equations of The Second Kind short code, described transmitting terminal, according to this Equations of The Second Kind short code, generates the short symbol of Equations of The Second Kind.

Concrete, the Equations of The Second Kind short code length in embodiment of the present invention Equations of The Second Kind frequency pilot sign is equal to number in subframe N/1. according to subcarrier shared by symbol (the PUSCH symbol of such as LTE)

The Equations of The Second Kind short code of the embodiment of the present invention can use zadoff-chu sequence construct, it would however also be possible to employ M Sequence or other sequence constructs.

Concrete building mode may refer to 3GPP TS 36.211 agreement, does not repeats them here.

After obtaining Equations of The Second Kind short code, shared by each element equally spaced write subframe in Equations of The Second Kind short code Subcarrier (subcarrier used equal to data symbol), be spaced apart N, and make W point IFFT fortune Calculate and obtain the Equations of The Second Kind short code short symbol of corresponding Equations of The Second Kind.

Equations of The Second Kind short code is repeated n times, adds the Cyclic Prefix of a length of L (i), just constitute Equations of The Second Kind and lead Frequency symbol.

For the 3rd class frequency pilot sign, described transmitting terminal determines each 3rd class that the 3rd class frequency pilot sign is corresponding Short symbol；

For once transmitting, described transmitting terminal selects the 3rd class short from all described 3rd short symbols of class Symbol；According to the transmission location that described 3rd class frequency pilot sign is corresponding, send the 3rd short symbol of class selected, So that receiving terminal carries out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

Accordingly, receiving terminal carries out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

Wherein, the short symbol of the first kind can be used for time synchronized.Comparing the 3rd short symbol of class, the first kind is short Symbol can carry out finer time synchronized.

In force, described transmitting terminal determines each 3rd class short code that described 3rd class frequency pilot sign is corresponding；

For a 3rd class short code, described transmitting terminal, according to the 3rd class short code, generates the 3rd short symbol of class.

Concrete, the 3rd class short code length in the embodiment of the present invention the 3rd class frequency pilot sign is equal to number in subframe M/1. according to subcarrier shared by symbol (the PUSCH symbol of such as LTE)

3rd class short code of the embodiment of the present invention can use zadoff-chu sequence construct, it would however also be possible to employ M Sequence or other sequence constructs.

Concrete building mode may refer to 3GPP TS 36.211 agreement, does not repeats them here.

After obtaining the 3rd class short code, shared by each element equally spaced write subframe in the 3rd class short code Subcarrier (subcarrier used equal to data symbol), be spaced apart M, and make W point IFFT fortune Calculate and obtain the 3rd short symbol of class that the 3rd class short code is corresponding.

3rd class short code is repeated M time, adds the Cyclic Prefix of a length of L (i), just constitute the 3rd class and lead Frequency symbol.

Optionally, for scheme one, described first kind frequency pilot sign correspondence S group short code, often group short code includes R first kind short code.

Transmission equipment, when once sending, can select one group of short code from S group short code, and from selection Group in R first kind short code in select a first kind short code.

The 3rd short symbol of class that described 3rd class frequency pilot sign correspondence S is different.

Optionally, above-mentioned S can be identical with needing the synchronization level carried out, and so there is no need to synchronization etc. Level receives equipment.S can also be set to a preset value, such as 1, then synchronization level needs by controlling Information indicates.

In force, control information can be put in the 3rd symbol of subframe transmission.

Optionally, in order to preferably carry out synchronizing and reduce inter-user interference, the 3rd of the embodiment of the present invention Any two the 3rd class short code cross correlation value (the i.e. cross-correlation of the forms of time and space of signal that class frequency pilot sign is corresponding Value) less than setting threshold value；Or each 3rd class in the described 3rd class frequency pilot sign of the embodiment of the present invention is short Code is that different time based on same sequence skew obtains.

Wherein, transmission equipment is when determining transmission location corresponding to described first kind frequency pilot sign, by same son At least one symbol in frame is as transmission location corresponding to described first kind frequency pilot sign.

Optionally, at least one symbol in described same subframe here includes the 6th symbol and the 11st Individual symbol.

Wherein, transmission equipment is when determining transmission location corresponding to described Equations of The Second Kind frequency pilot sign, by subframe The 1st symbol as transmission location corresponding to described Equations of The Second Kind frequency pilot sign.

Wherein, transmission equipment is when determining transmission location corresponding to described 3rd class frequency pilot sign, by subframe The 2nd symbol as transmission location corresponding to described 3rd class frequency pilot sign.

Transmission location that transmission location that concrete first kind frequency pilot sign is corresponding, Equations of The Second Kind frequency pilot sign are corresponding and The transmission location that 3rd class frequency pilot sign is corresponding may refer to Fig. 3.

It should be noted that the transmission location in Fig. 3 is merely illustrative, other transmission locations are equally applicable The embodiment of the present invention.The transmission location that concrete each class frequency pilot sign is corresponding can be true according to channel circumstance etc. Fixed, it is also possible to specify in the protocol.

For receiving equipment, when receiving equipment Inspection to signal power more than when setting threshold value, start AGC (automatic growth control).

After received signal power value is persistently more than threshold value more than the duration setting threshold value, (this threshold value can be The time that automatic gain completes the most in length and breadth), do relevant with the short symbol of Equations of The Second Kind or the 3rd short symbol of class, determine The time of advent of signal.

Do relevant with the short symbol of Equations of The Second Kind:

Do time domain with the time-domain signal of the short symbol of Equations of The Second Kind to reception data relevant, obtain first relevant peaks After, intercept the data of 13 symbols comprising front 1 the short symbol of relevant peaks.The length of data cutout window Degree can be adjusted according to thick synchronization accuracy, needs to comprise the data of complete symbol 2 to 13, specifically May refer to Fig. 4.

If the frequency deviation using the short symbol of Equations of The Second Kind to carry out rough grade is estimated, can be realized by following equation:

F=angle (Pda)/Tb；

Wherein, F is Frequency Estimation initial value；Angle is phase pushing figure；Tb is the short symbol of Equations of The Second Kind Time span；Pda is correlation, Pda=sum (conj (STb (1)) .*STb (2)), wherein STb (1) and STb (2) represents two short symbols of adjacent Equations of The Second Kind；Sum () sues for peace, and conj () asks conjugation .* to represent two The product of vector.

Do relevant with the 3rd short symbol of class:

Do time domain for the 3rd short symbol of class to reception data relevant, after obtaining first relevant peaks, intercept bag Containing half symbols before relevant peaks in the data of 13 interior symbols, specifically may refer to Fig. 5.

When there being multiple 3rd short symbol of class, need to do time domain with each the 3rd short symbol of class with receiving data Relevant, using the 3rd maximum for the relevant peaks short symbol of class as sending the 3rd short symbol of class that signal is used.

In force, reception equipment can use the 3rd short symbol of class to carry out time synchronized.

Concrete, receive time-domain signal and the data in data cutout window of the 3rd class symbol of equipment cascade Do relevant, fine clock can be obtained.If the 2nd symbol that the 3rd short symbol of class is placed in subframe is sent out Send, then correlation peak location is the original position of symbol 2, intercepts the data in each symbol based on this clock Carry out subsequent treatment.

If receiving the thick synchronization of the short symbol of equipment Equations of The Second Kind, and quantity S of the short symbol of above-mentioned Equations of The Second Kind being big In 1 time, can be parallel do relevant to the data in data cutout window, the short symbol obtaining maximum correlation peak is Send the short symbol of the actual employing of data.

In force, reception equipment can use the 3rd short symbol of class to compare thick frequency deviation to estimate (i.e. the One time frequency deviation is estimated).

Assuming that the 3rd short symbol of class the 2nd symbol in subframe is sent by transmission equipment, the equipment that receives is to the The short symbol of Equations of The Second Kind in 2 symbols is the FFT of W point, obtains frequency domain data.The frequency domain data that will obtain Do relevant to the frequency domain data of the 3rd type short code, it is estimated that frequency deviation fobs of subcarrier integral multiple.With The time domain data of the second symbol to the 13rd symbol is done frequency deviation and compensates by fobs, the most each time domain data dot product exp (-j*2*pi*fobs*n*ts), exp () is the index of e, and n is the numbering of time domain point, and ts is adjacent two The time interval of time domain point.

Reception equipment, after determining the 3rd short symbol of class received, determines group sequence according to the described 3rd short symbol of class Number, the first kind short code in group corresponding to group sequence number for the data of reception is carried out time domain relevant, determine generation The first kind short code that the short symbol of the described first kind received uses.

Concrete, when the first kind short code in group corresponding with group sequence number for the data of reception is carried out by reception equipment Be correlated with in territory, may determine that the short code used when sending equipment sending data according to correlation peak location.Determining After the short code used, carry out frequency deviation according to the short code determined and channel is estimated.Determining the short of employing further It is known that the scrambler that used of data after Ma, and then the data received are descrambled.

Optionally, the time of advent of signal can also be estimated further according to correlation peak location, it is achieved the time Fine tuning.

When reception equipment carries out frequency deviation estimation according to the 3rd short symbol of class, it is possible to use adjacent two the 3rd classes are short Sign estimation goes out correlation Pdb:

Pdb=sum (conj (STb (1)) .*STb (2)), Sum () sue for peace, and conj () asks conjugation .* to represent two The inner product of individual vector.

The short symbol of the first kind can also be utilized to determine correlation Pdc according to above-mentioned formula.

Frequency deviation estimated value can be calculated by following equation:

Foffset=angle (Pdb+Pdc)/T, wherein, T is the time span of 1 short symbol；Angle is phase Position skew.

When reception equipment carries out channel estimation according to the short symbol of the first kind, utilize Foffset that data are done frequency deviation Compensate, and estimate to intercept the short symbol of the first kind, symbol short to the first kind with up-to-date time of arrival (toa) further Number carry out FFT computing, can obtain being spaced apart the channel estimation value of the subcarrier of K.To these subcarriers Do interpolation, such as linear interpolation, it is possible to obtain the channel estimation value of all subcarriers.

Optionally, when carrying out linear interpolation, it is assumed that the channel of known subcarrier i and subcarrier i+k is estimated Value d (i) and d (i+k), then the channel estimation value of subcarrier i+x is d (i)+(d (i+k)-d (i))/K*x.

In force, above-mentioned W can take 1024, and S can take 3, and R can take 4.

As a example by the bandwidth of 10Mhz, the solution of the present invention one is illustrated below.

Method construct first kind short code, Equations of The Second Kind short code and the 3rd class that transmission equipment can be used in LTE are short Code.

Concrete method:

$r_{u,v}^{\left(\mathrm{\&alpha;}\right)}\left(n\right)=e^{\mathrm{j\&alpha;n}}{\stackrel{\&OverBar;}{r}}_{u,v}\left(n\right),0\&le;n<M_{\mathrm{sc}}^P/N$

${\stackrel{\&OverBar;}{r}}_{u,v}\left(n\right)=x_q\left(n\mathrm{mod}{N}_{\mathrm{ZC}}^P\right),0\&le;n<M_{\mathrm{sc}}^P$

$x_q\left(m\right)=e^{-j\frac{\mathrm{\&pi;qm}(m+1)}{N_{\mathrm{ZC}}^P}},0\&le;m\&le;N_{\mathrm{ZC}}^P-1$

$\stackrel{\&OverBar;}{q}=N_{\mathrm{ZC}}^P\&CenterDot;(u+1)/31$

It is satisfied $N_{\mathrm{ZC}}^P<M_{\mathrm{sc}}^P$ Largest prime.

The setting of Equations of The Second Kind short code relevant parameter:

It is the sub-carrier number shared by business datum, N=4.

U=0；

V=0；

The setting of the 3rd class short code relevant parameter:

$M_{\mathrm{sc}}^P=M_{\mathrm{sc}}^{\mathrm{PSCH}}/M,M=2$

U=0/10/20；

V=0；

The setting of first kind short code relevant parameter:

$M_{\mathrm{sc}}^P=M_{\mathrm{sc}}^{\mathrm{PSCH}}/K,$ K=2

U=0/10/20；The u value that first kind short code is identical with the 3rd class short code employing in a subframe.

V=0.

The physical meaning of above-mentioned letter and publicity may refer to 3GPP TS 36.211 agreement, the most superfluous at this State.

In force, first kind short code, Equations of The Second Kind short code and the subcarrier shared by the 3rd class short code are by data Shared subcarrier is comprised, and subcarrier spacing is K, N, M, as shown in Figure 6.

Estimating to preferably do channel, the sub-carrier positions shared by symbol 2,6 and 11 can on frequency domain Carry out certain interlocking.

The frequency domain of the frequency-region signal of first kind short code, the frequency-region signal of Equations of The Second Kind short code and the 3rd class short code is believed Number shown in Fig. 3, write each subcarrier, be the IFFT of 1024/N, 1024/M, 1024/K the most respectively Computing, obtains corresponding short code time-domain signal.

Short code time-domain signal is repeated respectively N, M, K time, and plus a length of L (i)-1024 circulation before Sew, obtain complete time-domain symbol.

The short symbol of Equations of The Second Kind that Equations of The Second Kind short code generates is put in symbol 1, the Equations of The Second Kind that Equations of The Second Kind short code generates Short symbol is put in symbol 2, and the short symbol of Equations of The Second Kind that Equations of The Second Kind short code generates is put in symbol 6 and 11.

Scheme two, carry out frequency deviation estimation during relate to first kind frequency pilot sign.

Scheme two need the built vertical temporal synchronization of system and frequency sub-carrier level synchronize, then in subframe The short symbol of some first kind of middle insertion, estimates for frequency deviation and channel is estimated.

The generation process of first kind frequency pilot sign is with scheme one, and difference is that the short symbol of the first kind inserts subframe Time-domain symbol position different.

Described transmitting terminal is corresponding as described first kind frequency pilot sign using at least one symbol in same subframe Transmission location time, at least one symbol in described same subframe includes the 3rd symbol, the 7th symbol With the 11st symbol, specifically may refer to Fig. 7；Or at least one symbol in described same subframe includes 3 symbols, the 6th symbol, the 9th symbol and the 12nd symbol, specifically may refer to Fig. 8.

Optionally, described first kind frequency pilot sign includes R first kind short code；Wherein R is positive integer.

In force, terminal is random from R basic symbol selection one when sending data.Wherein, number According to the scrambler used and described first kind frequency pilot sign one_to_one corresponding.Thus can effectively reduce end End.

Concrete, described transmitting terminal determines the scrambler that the short symbol of the described first kind of selection is corresponding；It is determined by Scrambler pair symbol short with the described first kind together with the data that send scramble.

Reception equipment intercepts the data comprising symbol 1 to 13

Time domain is done to all possible 3rd class short code relevant, according to correlation peak location by the data in symbol X May determine that the short code sending the actual employing of data.

Utilize the 3rd class short code in subframe it is estimated that Pdc, estimate process and scheme one class of Pdc Seemingly, do not repeat them here.

Calculate the time span that frequency deviation estimated value: Foffset=angle (Pdc)/T, T is 1 short symbol.

The processing procedure of reception equipment may refer to that scheme is a kind of receives the equipment process to the 3rd short symbol of class Process, does not repeats them here.

As a example by the bandwidth of 10Mhz, the solution of the present invention two is illustrated below.

Transmission equipment can use the method construct first kind short code in LTE, detailed process and scheme one class Seemingly, do not repeat them here.

Subcarrier shared by first kind short code is comprised by the subcarrier shared by data, and subcarrier spacing is K, specifically may refer to Fig. 9 or Figure 10.

Transmission equipment generates process and the scheme one of the 3rd short symbol of class according to the time-domain signal of first kind short code In identical, do not repeat them here.Difference is in scheme two the 3rd short symbol of class is added symbol 3,7,11 In, or in 3,6,9,12.

As shown in figure 11, the first transmission equipment of the embodiment of the present invention includes:

Determine module 1100, for determining the short symbol of each first kind that first kind frequency pilot sign is corresponding；

Selecting module 1101, for for once transmitting, described transmitting terminal is from all short symbols of the described first kind One short symbol of the first kind of middle selection；

Sending module 1102, for the transmission location corresponding according to described first kind frequency pilot sign, sends and selects The short symbol of the first kind so that receiving terminal carries out frequency deviation estimation according to the short symbol of the described first kind.

Optionally, described sending module 1102 is additionally operable to, and determines described first kind pilot tone according to following manner The transmission location that symbol is corresponding:

Using at least one symbol in same subframe as transmission location corresponding to described first kind frequency pilot sign.

Optionally, at least one symbol in described same subframe includes the 6th symbol and the 11st symbol； Or

At least one symbol in described same subframe includes the 3rd symbol, the 7th symbol and the 11st Symbol；Or

At least one symbol in described same subframe includes the 3rd symbol, the 6th symbol, the 9th symbol Number and the 12nd symbol.

Optionally, described determine module 1100 specifically for:

Determine each first kind short code that described first kind frequency pilot sign is corresponding；For a first kind short code, According to this first kind short code, generate the short symbol of the first kind.

Optionally, described first kind frequency pilot sign correspondence S group short code, often group short code includes that R the first kind is short Code；Or

Described first kind frequency pilot sign includes R first kind short code；

Wherein, S and R is positive integer.

Optionally, described sending module 1102 is additionally operable to:

Determine the scrambler that the short symbol of the described first kind of selection is corresponding；The scrambler pair being determined by and described first The data that the short symbol of class sends together scramble.

Optionally, described determine that module 1100 is additionally operable to:

Determine the short symbol of each Equations of The Second Kind that Equations of The Second Kind frequency pilot sign is corresponding；

Described selection module 1101 is additionally operable to:

For once transmitting, described transmitting terminal selects an Equations of The Second Kind short from all short symbols of described Equations of The Second Kind Symbol；

Described sending module 1102 is additionally operable to:

According to the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding, send the short symbol of Equations of The Second Kind selected, with Receiving terminal is made to carry out automatic growth control according to the short symbol of described Equations of The Second Kind.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 1st symbol in subframe.

Optionally, described determine that module 1100 is additionally operable to:

Determine each 3rd short symbol of class that the 3rd class frequency pilot sign is corresponding；

Described selection module 1101 is additionally operable to:

For once transmitting, from all described 3rd short symbols of class, select a 3rd short symbol of class；

Described sending module 1102 is additionally operable to:

According to the transmission location that described 3rd class frequency pilot sign is corresponding, send the 3rd short symbol of class selected, with Receiving terminal is made to carry out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 2nd symbol in subframe.

Optionally, described determine module 1100 specifically for:

Determine each 3rd class short code that described 3rd class frequency pilot sign is corresponding；For a 3rd class short code, According to the 3rd class short code, generate the 3rd short symbol of class.

Optionally, any two the 3rd class short code cross correlation value that described 3rd class frequency pilot sign is corresponding is less than setting Determine threshold value；Or

Each 3rd class short code in described 3rd class frequency pilot sign is that different time based on same sequence is inclined Shifting obtains.

As shown in figure 12, the first reception equipment of the embodiment of the present invention includes:

Receiver module 1200, for receiving the short symbol of the first kind from transmitting terminal, the wherein said first kind is short Symbol is that described transmitting terminal selects from the short symbol of all first kind that first kind frequency pilot sign is corresponding；

Processing module 1201, for carrying out frequency deviation estimation according to the short symbol of the described first kind.

Optionally, described receiver module 1200 specifically for:

According at least one symbol of the carrying short symbol of the first kind in subframe, receive the first kind from transmitting terminal Short symbol.

Optionally, at least one symbol described includes the 6th symbol in subframe and the 11st symbol；Or

At least one symbol described includes the 3rd symbol in subframe, the 7th symbol and the 11st symbol； Or

At least one symbol described include the 3rd symbol in subframe, the 6th symbol, the 9th symbol and 12nd symbol.

Optionally, described receiver module 1200 is additionally operable to:

Receive before the short symbol of the first kind of transmitting terminal, receive the short symbol of Equations of The Second Kind from transmitting terminal, The short symbol of wherein said Equations of The Second Kind is that described transmitting terminal is short from all Equations of The Second Kinds that Equations of The Second Kind frequency pilot sign is corresponding Symbol selects；

Described processing module 1201 is additionally operable to:

Automatic growth control is carried out according to the short symbol of described Equations of The Second Kind.

Optionally, described receiver module 1200 is additionally operable to:

Receive before the short symbol of the first kind of transmitting terminal, receive the 3rd short symbol of class from transmitting terminal, The wherein said 3rd short symbol of class is that described transmitting terminal is short from all 3rd classes that the 3rd class frequency pilot sign is corresponding Symbol selects；

Described processing module 1201 is additionally operable to:

Time synchronized and frequency offset correction is carried out according to the described 3rd short symbol of class.

Optionally, described processing module 1201 is additionally operable to:

Determining group sequence number according to the described 3rd short symbol of class, group corresponding to wherein said group of sequence number includes described The first kind short code that first kind frequency pilot sign is corresponding, described first kind short code is used for generating the short symbol of the described first kind Number；First kind short code in group corresponding to group sequence number for the data of reception is carried out time domain relevant, determine generation The first kind short code that the short symbol of the described first kind received uses.

It should be noted that the embodiment of the present invention can apply in D2D scene, then send equipment and connect Receiving unit is terminal.In different situations, transmission equipment is likely to, as reception equipment, receive equipment also Possibly as the equipment of transmission.Based on this, the function sending equipment and the equipment of reception of the embodiment of the present invention is permissible Entity realizes, say, that the module of Figure 11 and Figure 12 can be in an entity, according to need together Select to use the function of transmission equipment or the function of the equipment of reception.

As shown in figure 13, the second transmission equipment of the embodiment of the present invention includes:

Processor 1301, for reading the program in memorizer 1304, performs following process:

Determine the short symbol of each first kind that first kind frequency pilot sign is corresponding；For once transmitting, described transmission End selects a short symbol of the first kind from all short symbols of the described first kind；Accord with according to described first kind pilot tone Number corresponding transmission location, sends the short symbol of the first kind selected by transceiver 1302, so that receiving terminal Frequency deviation estimation is carried out according to the short symbol of the described first kind.

Transceiver 1302, for receiving and sending data under the control of processor 1301.

Optionally, described processor 1301 is additionally operable to, and determines that described first kind pilot tone accords with according to following manner Number corresponding transmission location:

Using at least one symbol in same subframe as transmission location corresponding to described first kind frequency pilot sign.

Optionally, at least one symbol in described same subframe includes the 6th symbol and the 11st symbol； Or

At least one symbol in described same subframe includes the 3rd symbol, the 7th symbol and the 11st Symbol；Or

At least one symbol in described same subframe includes the 3rd symbol, the 6th symbol, the 9th symbol Number and the 12nd symbol.

Optionally, described processor 1301 specifically for:

Determine each first kind short code that described first kind frequency pilot sign is corresponding；For a first kind short code, According to this first kind short code, generate the short symbol of the first kind.

Optionally, described first kind frequency pilot sign correspondence S group short code, often group short code includes that R the first kind is short Code；Or

Described first kind frequency pilot sign includes R first kind short code；

Wherein, S and R is positive integer.

Optionally, described processor 1301 is additionally operable to:

Determine the scrambler that the short symbol of the described first kind of selection is corresponding；The scrambler pair being determined by and described first The data that the short symbol of class sends together scramble.

Optionally, described processor 1301 is additionally operable to:

Determine the short symbol of each Equations of The Second Kind that Equations of The Second Kind frequency pilot sign is corresponding；For once transmitting, described transmission End selects a short symbol of Equations of The Second Kind from all short symbols of described Equations of The Second Kind；Accord with according to described Equations of The Second Kind pilot tone Number corresponding transmission location, sends the short symbol of Equations of The Second Kind selected, so that receiving terminal is short according to described Equations of The Second Kind Symbol carries out automatic growth control.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 1st symbol in subframe.

Optionally, described processor 1301 is additionally operable to:

Determine each 3rd short symbol of class that the 3rd class frequency pilot sign is corresponding；For once transmitting, from all institutes State one the 3rd short symbol of class of selection in the 3rd short symbol of class；According to the biography that described 3rd class frequency pilot sign is corresponding Defeated position, sends the 3rd short symbol of class selected, during so that receiving terminal is carried out according to the described 3rd short symbol of class Between synchronize and frequency offset correction.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 2nd symbol in subframe.

Optionally, described processor 1301 specifically for:

Determine each 3rd class short code that described 3rd class frequency pilot sign is corresponding；For a 3rd class short code, According to the 3rd class short code, generate the 3rd short symbol of class.

Optionally, any two the 3rd class short code cross correlation value that described 3rd class frequency pilot sign is corresponding is less than setting Determine threshold value；Or

Each 3rd class short code in described 3rd class frequency pilot sign is that different time based on same sequence is inclined Shifting obtains.

In fig. 13, bus architecture (represents by bus 1300), and bus 1300 can include Arbitrary Digit The bus of the interconnection of amount and bridge, bus 1300 will include the one or more process represented by processor 1301 The various electrical chains of the memorizer that device and memorizer 1304 represent are connected together.Bus 1300 can also be by all Other electrical chains various such as ancillary equipment, manostat and management circuit or the like are connected together, these It is all to it is known in the art, therefore, the most no longer it is described further.EBI 1303 Interface is provided between bus 1300 and transceiver 1302.Transceiver 1302 can be an element, also Can be multiple element, the most multiple receptors and transmitter, it is provided that for over a transmission medium with various its The unit of his device communication.The data that treated device 1301 processes are entered on the radio medium by antenna 1305 Row transmission, further, antenna 1305 also receives data and transfers data to processor 1301.

Processor 1301 is responsible for bus 1300 and common process, it is also possible to provide various function, bag Include timing, peripheral interface, voltage-regulation, power management and other control functions.And memorizer 1304 Can be used for storing the data that processor 1301 is used when performing operation.

Optionally, processor 1301 can be CPU (centre buries device), ASIC (Application Specific Integrated Circuit, special IC), FPGA (Field-Programmable Gate Array, Field programmable gate array) or CPLD (Complex Programmable Logic Device, complexity can be compiled Journey logical device).

As shown in figure 14, the second reception equipment of the embodiment of the present invention includes:

Processor 1401, for reading the program in memorizer 1404, performs following process:

The short symbol of the first kind from transmitting terminal, the short symbol of the wherein said first kind is received by transceiver 1402 Number it is that described transmitting terminal selects from the short symbol of all first kind that first kind frequency pilot sign is corresponding；According to institute State the short symbol of the first kind and carry out frequency deviation estimation.

Transceiver 1402, for receiving and sending data under the control of processor 1401.

Optionally, described processor 1401 specifically for:

According at least one symbol of the carrying short symbol of the first kind in subframe, receive the first kind from transmitting terminal Short symbol.

Optionally, at least one symbol described includes the 6th symbol in subframe and the 11st symbol；Or

At least one symbol described includes the 3rd symbol in subframe, the 7th symbol and the 11st symbol； Or

At least one symbol described include the 3rd symbol in subframe, the 6th symbol, the 9th symbol and 12nd symbol.

Optionally, described processor 1401 is additionally operable to:

Receive before the short symbol of the first kind of transmitting terminal, receive the short symbol of Equations of The Second Kind from transmitting terminal, The short symbol of wherein said Equations of The Second Kind is that described transmitting terminal is short from all Equations of The Second Kinds that Equations of The Second Kind frequency pilot sign is corresponding Symbol selects；Automatic growth control is carried out according to the short symbol of described Equations of The Second Kind.

Optionally, described processor 1401 is additionally operable to:

Receive before the short symbol of the first kind of transmitting terminal, receive the 3rd short symbol of class from transmitting terminal, The wherein said 3rd short symbol of class is that described transmitting terminal is short from all 3rd classes that the 3rd class frequency pilot sign is corresponding Symbol selects；Time synchronized and frequency offset correction is carried out according to the described 3rd short symbol of class.

Optionally, described processor 1401 is additionally operable to:

Determining group sequence number according to the described 3rd short symbol of class, group corresponding to wherein said group of sequence number includes described The first kind short code that first kind frequency pilot sign is corresponding, described first kind short code is used for generating the short symbol of the described first kind Number；First kind short code in group corresponding to group sequence number for the data of reception is carried out time domain relevant, determine generation The first kind short code that the short symbol of the described first kind received uses.

In fig. 14, bus architecture (represents by bus 1400), and bus 1400 can include Arbitrary Digit The bus of the interconnection of amount and bridge, bus 1400 will include the one or more process represented by processor 1401 The various electrical chains of the memorizer that device and memorizer 1404 represent are connected together.Bus 1400 can also be by all Other electrical chains various such as ancillary equipment, manostat and management circuit or the like are connected together, these It is all to it is known in the art, therefore, the most no longer it is described further.EBI 1403 Interface is provided between bus 1400 and transceiver 1402.Transceiver 1402 can be an element, also Can be multiple element, the most multiple receptors and transmitter, it is provided that for over a transmission medium with various its The unit of his device communication.The data that treated device 1401 processes are entered on the radio medium by antenna 1405 Row transmission, further, antenna 1405 also receives data and transfers data to processor 1401.

Processor 1401 is responsible for bus 1400 and common process, it is also possible to provide various function, bag Include timing, peripheral interface, voltage-regulation, power management and other control functions.And memorizer 1404 Can be used for storing the data that processor 1401 is used when performing operation.

Optionally, processor 1401 can be CPU, ASIC, FPGA or CPLD.

It should be noted that the embodiment of the present invention can apply in D2D scene, then send equipment and connect Receiving unit is terminal.In different situations, transmission equipment is likely to, as reception equipment, receive equipment also Possibly as the equipment of transmission.Based on this, the function sending equipment and the equipment of reception of the embodiment of the present invention is permissible Entity realizes, say, that the module of Figure 13 and Figure 14 can be in an entity, according to need together Select to use the function of transmission equipment or the function of the equipment of reception.Such as can be by processor 1301 and place Reason device 1401 synthesizes a processor；Transceiver 1302 and transceiver 1402 are synthesized a transceiver； Memorizer 1304 and memorizer 1404 are synthesized a memorizer.Other entities in Figure 13 and Figure 14 are also An entity can be synthesized.It is of course also possible to the entity in Figure 13 and Figure 14 can not also synthesize a reality Body, ratio, if any two processors, has two transceivers etc.；Can also partial synthesis be an entity, part Do not synthesize an entity.

Based on same inventive concept, the embodiment of the present invention additionally provides the method carrying out frequency deviation estimation, due to The principle that the method solves problem is similar to the system that the embodiment of the present invention carries out frequency deviation estimation, therefore the method Enforcement may refer to the enforcement of method, repeat no more in place of repetition.

As shown in figure 15, a kind of method carrying out frequency deviation estimation of the embodiment of the present invention includes:

Step 1500, transmitting terminal determine the short symbol of each first kind that first kind frequency pilot sign is corresponding；

Step 1501, for once transmitting, described transmitting terminal selects one from all short symbols of the described first kind The short symbol of the individual first kind；

Step 1502, described transmitting terminal, according to transmission location corresponding to described first kind frequency pilot sign, send choosing The short symbol of the first kind selected, so that receiving terminal carries out frequency deviation estimation according to the short symbol of the described first kind.

Optionally, described transmitting terminal determines, according to following manner, the transmission position that described first kind frequency pilot sign is corresponding Put:

Described transmitting terminal is corresponding as described first kind frequency pilot sign using at least one symbol in same subframe Transmission location.

Optionally, at least one symbol in described same subframe includes the 6th symbol and the 11st symbol； Or

At least one symbol in described same subframe includes the 3rd symbol, the 7th symbol and the 11st Symbol；Or

At least one symbol in described same subframe includes the 3rd symbol, the 6th symbol, the 9th symbol Number and the 12nd symbol.

Optionally, described transmitting terminal determines the short symbol of each first kind that first kind frequency pilot sign is corresponding, including:

Described transmitting terminal determines each first kind short code that described first kind frequency pilot sign is corresponding；

For a first kind short code, described transmitting terminal, according to this first kind short code, generates the short symbol of the first kind.

Optionally, described first kind frequency pilot sign correspondence S group short code, often group short code includes that R the first kind is short Code；Or

Described first kind frequency pilot sign includes R first kind short code；

Wherein, S and R is positive integer.

Optionally, described transmitting terminal sends the short symbol of the first kind selected, and also includes:

Described transmitting terminal determines the scrambler that the short symbol of the described first kind of selection is corresponding；

The data sent together with the scrambler pair that described transmitting terminal is determined by symbol short with the described first kind are carried out Scrambling.

Optionally, the method also includes:

Described transmitting terminal determines the short symbol of each Equations of The Second Kind that Equations of The Second Kind frequency pilot sign is corresponding；

For once transmitting, described transmitting terminal selects an Equations of The Second Kind short from all short symbols of described Equations of The Second Kind Symbol；

Described transmitting terminal, according to transmission location corresponding to described Equations of The Second Kind frequency pilot sign, sends the Equations of The Second Kind selected Short symbol, so that receiving terminal carries out automatic growth control according to the short symbol of described Equations of The Second Kind.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 1st symbol in subframe.

Optionally, the method also includes:

Described transmitting terminal determines each 3rd short symbol of class that the 3rd class frequency pilot sign is corresponding；

For once transmitting, described transmitting terminal selects the 3rd class short from all described 3rd short symbols of class Symbol；

Described transmitting terminal, according to transmission location corresponding to described 3rd class frequency pilot sign, sends the 3rd class selected Short symbol, so that receiving terminal carries out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

Optionally, the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding is the 2nd symbol in subframe.

Optionally, described transmitting terminal determines each 3rd short symbol of class that the 3rd class frequency pilot sign is corresponding, including:

Described transmitting terminal determines each 3rd class short code that described 3rd class frequency pilot sign is corresponding；

For a 3rd class short code, described transmitting terminal, according to the 3rd class short code, generates the 3rd short symbol of class.

Optionally, any two the 3rd class short code cross correlation value that described 3rd class frequency pilot sign is corresponding is less than setting Determine threshold value；Or

Each 3rd class short code in described 3rd class frequency pilot sign is that different time based on same sequence is inclined Shifting obtains.

As described in Figure 16, embodiment of the present invention another kind carries out the method for frequency deviation estimation and includes:

Step 1600, receiving terminal receive the short symbol of the first kind from transmitting terminal, the short symbol of the wherein said first kind Number it is that described transmitting terminal selects from the short symbol of all first kind that first kind frequency pilot sign is corresponding；

Step 1601, described receiving terminal carry out frequency deviation estimation according to the short symbol of the described first kind.

It is preferred that described receiving terminal receives the short symbol of the first kind from transmitting terminal, including:

Described receiving terminal, according at least one symbol of the carrying short symbol of the first kind in subframe, receives from transmission The short symbol of the first kind of end.

It is preferred that at least one symbol described includes the 6th symbol in subframe and the 11st symbol；Or

At least one symbol described includes the 3rd symbol in subframe, the 7th symbol and the 11st symbol； Or

At least one symbol described include the 3rd symbol in subframe, the 6th symbol, the 9th symbol and 12nd symbol.

It is preferred that described receiving terminal received before the short symbol of the first kind of transmitting terminal, also include:

Described receiving terminal receives the short symbol of Equations of The Second Kind from transmitting terminal, and the short symbol of wherein said Equations of The Second Kind is institute State what transmitting terminal selected from the short symbol of all Equations of The Second Kinds that Equations of The Second Kind frequency pilot sign is corresponding；

The method also includes:

Described receiving terminal carries out automatic growth control according to the short symbol of described Equations of The Second Kind.

It is preferred that described receiving terminal received before the short symbol of the first kind of transmitting terminal, also include:

Described receiving terminal receives the 3rd short symbol of class from transmitting terminal, and the wherein said 3rd short symbol of class is institute State what transmitting terminal selected from all 3rd short symbols of class that the 3rd class frequency pilot sign is corresponding；

The method also includes:

Described receiving terminal carries out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

It is preferred that described receiving terminal receives after the short symbol of the first kind of transmitting terminal, also include:

Described receiving terminal determines group sequence number, the group that wherein said group of sequence number is corresponding according to the described 3rd short symbol of class Include that the first kind short code that described first kind frequency pilot sign is corresponding, described first kind short code are used for generating described The short symbol of the first kind；

First kind short code in group corresponding with group sequence number for the data of reception is carried out time domain phase by described receiving terminal Close, determine and generate the first kind short code that the short symbol of the described first kind received uses.

It can be seen from the above: the corresponding multiple first kind of the first kind frequency pilot sign of the embodiment of the present invention are short Symbol, short for first kind symbol is sent to reception equipment by transmission equipment；Reception equipment is according to the short symbol of the first kind Carry out frequency deviation estimation.Middle reception equipment directly carries out frequency deviation according to first kind frequency pilot sign and estimates The mode of meter, the embodiment of the present invention carries out frequency deviation estimation owing to using the short symbol of the first kind such that it is able to improve The detection performance of signal, it is possible to the frequency deviation preferably adapted under high-speed mobile environment estimates requirement.

Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.

Claims (36)

1. the method carrying out frequency deviation estimation, it is characterised in that the method includes:

Transmitting terminal determines the short symbol of each first kind that first kind frequency pilot sign is corresponding；

For once transmitting, described transmitting terminal selects a first kind short from all short symbols of the described first kind Symbol；

Described transmitting terminal, according to transmission location corresponding to described first kind frequency pilot sign, sends the first kind selected Short symbol, so that receiving terminal carries out frequency deviation estimation according to the short symbol of the described first kind.

2. the method for claim 1, it is characterised in that described transmitting terminal is true according to following manner The transmission location that fixed described first kind frequency pilot sign is corresponding:

Described transmitting terminal is corresponding as described first kind frequency pilot sign using at least one symbol in same subframe Transmission location.

3. method as claimed in claim 2, it is characterised in that at least one in described same subframe Symbol includes the 6th symbol and the 11st symbol；Or

At least one symbol in described same subframe includes the 3rd symbol, the 7th symbol and the 11st Symbol；Or

At least one symbol in described same subframe includes the 3rd symbol, the 6th symbol, the 9th symbol Number and the 12nd symbol.

4. the method for claim 1, it is characterised in that described transmitting terminal determines first kind pilot tone The short symbol of each first kind that symbol is corresponding, including:

Described transmitting terminal determines each first kind short code that described first kind frequency pilot sign is corresponding；

For a first kind short code, described transmitting terminal, according to this first kind short code, generates the short symbol of the first kind.

5. method as claimed in claim 4, it is characterised in that described first kind frequency pilot sign correspondence S Group short code, often group short code includes R first kind short code；Or

Described first kind frequency pilot sign includes R first kind short code；

Wherein, S and R is positive integer.

6. the method for claim 1, it is characterised in that described transmitting terminal sends first selected The short symbol of class, also includes:

Described transmitting terminal determines the scrambler that the short symbol of the described first kind of selection is corresponding；

The data sent together with the scrambler pair that described transmitting terminal is determined by symbol short with the described first kind are carried out Scrambling.

7. the method for claim 1, it is characterised in that the method also includes:

Described transmitting terminal determines the short symbol of each Equations of The Second Kind that Equations of The Second Kind frequency pilot sign is corresponding；

For once transmitting, described transmitting terminal selects an Equations of The Second Kind short from all short symbols of described Equations of The Second Kind Symbol；

Described transmitting terminal, according to transmission location corresponding to described Equations of The Second Kind frequency pilot sign, sends the Equations of The Second Kind selected Short symbol, so that receiving terminal carries out automatic growth control according to the short symbol of described Equations of The Second Kind.

8. method as claimed in claim 7, it is characterised in that described Equations of The Second Kind frequency pilot sign is corresponding Transmission location is the 1st symbol in subframe.

9. the method as described in as arbitrary in claim 1～8, it is characterised in that the method also includes:

Described transmitting terminal determines each 3rd short symbol of class that the 3rd class frequency pilot sign is corresponding；

For once transmitting, described transmitting terminal selects the 3rd class short from all described 3rd short symbols of class Symbol；

Described transmitting terminal, according to transmission location corresponding to described 3rd class frequency pilot sign, sends the 3rd class selected Short symbol, so that receiving terminal carries out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

10. method as claimed in claim 9, it is characterised in that described Equations of The Second Kind frequency pilot sign is corresponding Transmission location is the 2nd symbol in subframe.

11. methods as claimed in claim 9, it is characterised in that described transmitting terminal determines the 3rd class pilot tone Each 3rd short symbol of class that symbol is corresponding, including:

Described transmitting terminal determines each 3rd class short code that described 3rd class frequency pilot sign is corresponding；

For a 3rd class short code, described transmitting terminal, according to the 3rd class short code, generates the 3rd short symbol of class.

12. methods as claimed in claim 11, it is characterised in that described 3rd class frequency pilot sign is corresponding Any two the 3rd class short code cross correlation value less than set threshold value；Or

Each 3rd class short code in described 3rd class frequency pilot sign is that different time based on same sequence is inclined Shifting obtains.

13. 1 kinds of methods carrying out frequency deviation estimation, it is characterised in that the method includes:

Receiving terminal receives the short symbol of the first kind from transmitting terminal, and the short symbol of the wherein said first kind is described Sending end selects from the short symbol of all first kind that first kind frequency pilot sign is corresponding；

Described receiving terminal carries out frequency deviation estimation according to the short symbol of the described first kind.

14. methods as claimed in claim 13, it is characterised in that described receiving terminal receives from transmission The short symbol of the first kind of end, including:

Described receiving terminal, according at least one symbol of the carrying short symbol of the first kind in subframe, receives from transmission The short symbol of the first kind of end.

15. methods as claimed in claim 14, it is characterised in that at least one symbol described includes son The 6th symbol in frame and the 11st symbol；Or

At least one symbol described includes the 3rd symbol in subframe, the 7th symbol and the 11st symbol； Or

At least one symbol described include the 3rd symbol in subframe, the 6th symbol, the 9th symbol and 12nd symbol.

16. methods as claimed in claim 14, it is characterised in that described receiving terminal receives from transmission Before the short symbol of the first kind of end, also include:

Described receiving terminal receives the short symbol of Equations of The Second Kind from transmitting terminal, and the short symbol of wherein said Equations of The Second Kind is institute State what transmitting terminal selected from the short symbol of all Equations of The Second Kinds that Equations of The Second Kind frequency pilot sign is corresponding；

The method also includes:

Described receiving terminal carries out automatic growth control according to the short symbol of described Equations of The Second Kind.

17. methods as claimed in claim 14, it is characterised in that described receiving terminal receives from transmission Before the short symbol of the first kind of end, also include:

Described receiving terminal receives the 3rd short symbol of class from transmitting terminal, and the wherein said 3rd short symbol of class is institute State what transmitting terminal selected from all 3rd short symbols of class that the 3rd class frequency pilot sign is corresponding；

The method also includes:

Described receiving terminal carries out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

18. methods as claimed in claim 17, it is characterised in that described receiving terminal receives from transmission After the short symbol of the first kind of end, also include:

Described receiving terminal determines group sequence number, the group that wherein said group of sequence number is corresponding according to the described 3rd short symbol of class Include that the first kind short code that described first kind frequency pilot sign is corresponding, described first kind short code are used for generating described The short symbol of the first kind；

First kind short code in group corresponding with group sequence number for the data of reception is carried out time domain phase by described receiving terminal Close, determine and generate the first kind short code that the short symbol of the described first kind received uses.

19. 1 kinds of transmission equipment carrying out frequency deviation estimation, it is characterised in that this transmission equipment includes:

Determine module, for determining the short symbol of each first kind that first kind frequency pilot sign is corresponding；

Selecting module, for for once transmitting, described transmitting terminal selects from all short symbols of the described first kind Select a short symbol of the first kind；

Sending module, for according to transmission location corresponding to described first kind frequency pilot sign, sends the selected The one short symbol of class, so that receiving terminal carries out frequency deviation estimation according to the short symbol of the described first kind.

20. send equipment as claimed in claim 19, it is characterised in that described sending module is additionally operable to, The transmission location that described first kind frequency pilot sign is corresponding is determined according to following manner:

Using at least one symbol in same subframe as transmission location corresponding to described first kind frequency pilot sign.

21. send equipment as claimed in claim 20, it is characterised in that in described same subframe extremely A few symbol includes the 6th symbol and the 11st symbol；Or

At least one symbol in described same subframe includes the 3rd symbol, the 7th symbol and the 11st Symbol；Or

At least one symbol in described same subframe includes the 3rd symbol, the 6th symbol, the 9th symbol Number and the 12nd symbol.

22. send equipment as claimed in claim 19, it is characterised in that described determine that module is specifically used In:

Determine each first kind short code that described first kind frequency pilot sign is corresponding；For a first kind short code, According to this first kind short code, generate the short symbol of the first kind.

23. send equipment as claimed in claim 22, it is characterised in that described first kind frequency pilot sign Corresponding S group short code, often group short code includes R first kind short code；Or

Described first kind frequency pilot sign includes R first kind short code；

Wherein, S and R is positive integer.

24. send equipment as claimed in claim 19, it is characterised in that described sending module is additionally operable to:

Determine the scrambler that the short symbol of the described first kind of selection is corresponding；The scrambler pair being determined by and described first The data that the short symbol of class sends together scramble.

25. send equipment as claimed in claim 19, it is characterised in that described determine that module is additionally operable to:

Determine the short symbol of each Equations of The Second Kind that Equations of The Second Kind frequency pilot sign is corresponding；

Described selection module is additionally operable to:

For once transmitting, described transmitting terminal selects an Equations of The Second Kind short from all short symbols of described Equations of The Second Kind Symbol；

Described sending module is additionally operable to:

According to the transmission location that described Equations of The Second Kind frequency pilot sign is corresponding, send the short symbol of Equations of The Second Kind selected, with Receiving terminal is made to carry out automatic growth control according to the short symbol of described Equations of The Second Kind.

26. send equipment as claimed in claim 25, it is characterised in that described Equations of The Second Kind frequency pilot sign Corresponding transmission location is the 1st symbol in subframe.

27. as arbitrary in claim 19～26 as described in transmission equipment, it is characterised in that described determine module It is additionally operable to:

Determine each 3rd short symbol of class that the 3rd class frequency pilot sign is corresponding；

Described selection module is additionally operable to:

For once transmitting, from all described 3rd short symbols of class, select a 3rd short symbol of class；

Described sending module is additionally operable to:

According to the transmission location that described 3rd class frequency pilot sign is corresponding, send the 3rd short symbol of class selected, with Receiving terminal is made to carry out time synchronized and frequency offset correction according to the described 3rd short symbol of class.

28. send equipment as claimed in claim 27, it is characterised in that described Equations of The Second Kind frequency pilot sign Corresponding transmission location is the 2nd symbol in subframe.

29. send equipment as claimed in claim 27, it is characterised in that described determine that module is specifically used In:

Determine each 3rd class short code that described 3rd class frequency pilot sign is corresponding；For a 3rd class short code, According to the 3rd class short code, generate the 3rd short symbol of class.

30. send equipment as claimed in claim 29, it is characterised in that described 3rd class frequency pilot sign Corresponding any two the 3rd class short code cross correlation value is less than setting threshold value；Or

Each 3rd class short code in described 3rd class frequency pilot sign is that different time based on same sequence is inclined Shifting obtains.

31. 1 kinds of reception equipment carrying out frequency deviation estimation, it is characterised in that this reception equipment includes:

Receiver module, for receiving the short symbol of the first kind from transmitting terminal, the short symbol of the wherein said first kind It is that described transmitting terminal selects from the short symbol of all first kind that first kind frequency pilot sign is corresponding；

Processing module, for carrying out frequency deviation estimation according to the short symbol of the described first kind.

32. receive equipment as claimed in claim 31, it is characterised in that described receiver module is specifically used In:

According at least one symbol of the carrying short symbol of the first kind in subframe, receive the first kind from transmitting terminal Short symbol.

33. receive equipment as claimed in claim 32, it is characterised in that at least one symbol bag described The 6th symbol in enclosed tool frame and the 11st symbol；Or

At least one symbol described includes the 3rd symbol in subframe, the 7th symbol and the 11st symbol； Or

At least one symbol described include the 3rd symbol in subframe, the 6th symbol, the 9th symbol and 12nd symbol.

34. receive equipment as claimed in claim 32, it is characterised in that described receiver module is additionally operable to:

Receive before the short symbol of the first kind of transmitting terminal, receive the short symbol of Equations of The Second Kind from transmitting terminal, The short symbol of wherein said Equations of The Second Kind is that described transmitting terminal is short from all Equations of The Second Kinds that Equations of The Second Kind frequency pilot sign is corresponding Symbol selects；

Described processing module is additionally operable to:

Automatic growth control is carried out according to the short symbol of described Equations of The Second Kind.

35. receive equipment as claimed in claim 32, it is characterised in that described receiver module is additionally operable to:

Receive before the short symbol of the first kind of transmitting terminal, receive the 3rd short symbol of class from transmitting terminal, The wherein said 3rd short symbol of class is that described transmitting terminal is short from all 3rd classes that the 3rd class frequency pilot sign is corresponding Symbol selects；

Described processing module is additionally operable to:

Time synchronized and frequency offset correction is carried out according to the described 3rd short symbol of class.

36. receive equipment as claimed in claim 35, it is characterised in that described processing module is additionally operable to:

Determining group sequence number according to the described 3rd short symbol of class, group corresponding to wherein said group of sequence number includes described The first kind short code that first kind frequency pilot sign is corresponding, described first kind short code is used for generating the short symbol of the described first kind Number；First kind short code in group corresponding to group sequence number for the data of reception is carried out time domain relevant, determine generation The first kind short code that the short symbol of the described first kind received uses.