CN103516654A - Frequency offset estimation method and system - Google Patents

Abstract

The invention discloses a frequency offset estimation method and a frequency offset estimation system and belongs to the field of communication. The method comprises the following steps that: user equipment transmits single carrier frequency division multiplexing signals on physical uplink control channel (PUCCH) resources through using a predetermined resource mapping mode, wherein the predetermined resource mapping mode does not contain time domain code division multiplexing; and a base station estimates a frequency offset value through using phase difference between symbols in the received single carrier frequency division multiplexing signals, wherein the symbols transmit identical signals. According to the frequency offset estimation method and the frequency offset estimation system of the invention, the single carrier frequency division multiplexing signals are transmitted on the physical uplink control channel (PUCCH) resources through using the resource mapping mode that does not contain the time domain code division multiplexing, and therefore, the base station side can perform frequency offset estimation according to the received signals of a physical uplink control channel (PUCCH), and can perform frequency offset adjustment according to frequency offset estimation results, and as a result, the demodulation performance of the physical uplink control channel (PUCCH) and operational stability of the system can be enhanced.

Description

Frequency deviation estimating method and system

Technical field

The present invention relates to the communications field, particularly a kind of frequency deviation estimating method and system.

Background technology

In wireless communication system, due to the frequency difference between transmitting apparatus and receiving equipment, and transmitting apparatus moves the brought impacts such as Doppler frequency shift, make to have frequency shift (FS) between carrier frequency that receiving equipment receives and the frequency of local crystal oscillator, be called for short frequency deviation (being also Frequency Offset).

Specific to LTE(Long Term Evolution, Long Term Evolution) in system, in realization during uplink transmission, UE(User Equipment as transmitting apparatus, subscriber equipment) utilize PUCCH(Physical Uplink Control CHannelChannel, Physical Uplink Control Channel) and PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) to the base station as receiving equipment, send up signaling or frequency deviation estimation need to be carried out to UE in upstream data Shi， base station.Character below frequency deviation estimation general using is carried out: to sending two OFDM(Orthogonal Frequency Division Multiple4ingMultiplexing of same signal, OFDM) symbol, if there is fixedly frequency deviation, there is fixing phase difference in two OFDM receiving symbols.Based on above-mentioned character, frequency deviation estimating method of the prior art mainly comprises: the first, and base station obtains the frequency pilot sign of two predetermined time intervals of being separated by PUSCH as two symbols that send same signal; The second, estimating frequency offset is carried out according to the phase difference between these two frequency pilot signs in base station.

In realizing process of the present invention, inventor finds that prior art at least exists following problem: in prior art, base station mainly utilizes PUSCH to carry out frequency deviation estimation, within a period of time, only there is PUCCH scheduling and do not exist PUSCH scheduling Shi， base station cannot utilize PUSCH to carry out frequency deviation estimation.If now UE is in high-speed mobile scene (using UE in the high ferro compartment travelling rapidly such as user), the Doppler frequency shift that cannot carry out in frequency deviation estimation and actual scene due to base station side is larger, by the demodulation performance degradation that causes base station side to PUCCH, even need UE connecting system again.

Summary of the invention

For the frequency deviation estimation problem that solves UE under High-speed Circumstance and while only there is for a long time PUCCH scheduling, the embodiment of the present invention provides a kind of frequency deviation estimating method and system.Described technical scheme is as follows:

According to an aspect of the present invention, the embodiment of the present invention provides a kind of frequency deviation estimating method, and described method comprises:

Subscriber equipment utilizes predetermined resource mapping mode in row control channel resource, to send single carrier frequency division multiplex signal physically, and described predetermined resource mapping mode does not comprise time domain code division multiplexing;

Base station utilizes the phase difference estimation frequency deviation value between the symbol that sends same signal in the described single carrier frequency division multiplex signal receiving.

According to a further aspect in the invention, the embodiment of the present invention provides a kind of frequency deviation estimating system, and described system comprises:

Subscriber equipment, for utilizing predetermined resource mapping mode to send single carrier frequency division multiplex signal in row control channel resource physically, described predetermined resource mapping mode does not comprise time domain code division multiplexing;

Base station, for utilizing the described single carrier frequency division multiplex signal receiving to send the phase difference estimation frequency deviation value between the symbol of same signal.

The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:

The resource mapping method that does not comprise time domain code division multiplexing by utilizing sends single carrier frequency division multiplex signal in PUCCH resource, make the base station side can be according to the phase difference estimation frequency deviation value sending in the single carrier frequency division multiplex signal receiving in PUCCH resource between the symbol of same signal, solve the base station side of UE under High-speed Circumstance and while only there is for a long time PUCCH scheduling and cannot effectively carry out the problem of frequency deviation estimation, thereby reached base station side and can carry out frequency deviation estimation according to the reception signal of PUCCH, and carry out frequency deviation adjustment according to frequency offset estimation result, to increase the effect for demodulation performance and the system run all right of PUCCH.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the method flow diagram of the frequency deviation estimating method that provides of the embodiment of the present invention one;

Fig. 2 is the method flow diagram of the frequency deviation estimating method that provides of the embodiment of the present invention two;

Fig. 3 A to Fig. 3 D is respectively the first kind of way that offers of the embodiment of the present invention two and the Frequency Estimation schematic diagram of the second way;

Fig. 4 is the method flow diagram of the frequency deviation estimating method that provides of the embodiment of the present invention three;

Fig. 5 A to Fig. 5 D is respectively the first kind of way that offers of the embodiment of the present invention three and the Frequency Estimation schematic diagram of the second way;

Fig. 6 is the block diagram of the frequency deviation estimating system that provides of the embodiment of the present invention four;

Fig. 7 is a kind of block diagram of the subscriber equipment that provides of the embodiment of the present invention four;

Fig. 8 is a kind of block diagram of the base station that provides of the embodiment of the present invention four;

Fig. 9 is the another kind of block diagram of the base station that provides of the embodiment of the present invention four;

Figure 10 is another block diagram of the base station that provides of the embodiment of the present invention four;

Figure 11 is the another kind of block diagram of the subscriber equipment that provides of the embodiment of the present invention four;

Figure 12 is another block diagram of the base station that provides of the embodiment of the present invention four;

Figure 13 is the another kind of block diagram of the base station that provides of the embodiment of the present invention four;

Figure 14 is another block diagram of the base station that provides of the embodiment of the present invention four.

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.

According to current LTE agreement, PUCCH is designed with the multiple formats such as form 1/1a/1b/2/2a/2b/3, is used for transmitting dissimilar upstream control signaling.Only relate to form 1/1a/1b and form 3 herein.Wherein, the delivery plan of existing PUCCH form 1/1a/1b comprises: on same running time-frequency resource, pass through different CS(Cyclic Shift, cyclic shift) sequence and OC(orthogonal Cover, quadrature) code differentiation PUCCH form 1/1a/1b resource.Wherein, with OC code, carrying out code division multiplexing, to distinguish different user be the main cause that base station side cannot utilize the reception signal of PUCCH form 1/1a/1b to carry out frequency deviation estimation.And the delivery plan of existing PUCCH form 3 comprises: frequency pilot sign is distinguished to user by different CS sequences, data symbol is distinguished to user with different OC codes.Wherein, because data symbol carries out code division multiplexing with OC code, make base station side can only utilize the frequency pilot sign in the reception signal of PUCCH form 3 to carry out frequency deviation estimation, and cannot carry out frequency deviation estimation by usage data symbol, so frequency offset estimation accuracy is lower.Above-mentioned two reasons be UE under High-speed Circumstance and only have for a long time PUCCH when scheduling, base station side cannot be carried out the reason that frequency deviation is estimated effectively.For this reason, a Focal point and difficult point is herein exactly: keeping under the prerequisite that existing host-host protocol is constant as far as possible, cancelling and utilize OC code to carry out the link of time domain code division multiplexing, making base station side to carry out frequency deviation estimation according to the reception signal of PUCCH.Specifically please refer to following embodiment:

Embodiment mono-

Please refer to Fig. 1, it shows the method flow diagram of the frequency deviation estimating method that the embodiment of the present invention one provides.This frequency deviation estimating method can comprise:

Step 101, subscriber equipment utilizes predetermined resource mapping mode in row control channel resource, to send single carrier frequency division multiplex signal physically, and predetermined resource mapping mode does not comprise time domain code division multiplexing;

Subscriber equipment can send SC-FDMA(Signal-carrier frequency division multiple access with the predetermined resource mapping mode that does not comprise time domain code division multiplexing in PUCCH resource, and single carrier frequency division is multiplexing) signal.PUCCH resource comprises PUCCH form 1/1a/1b resource and/or PUCCH form 3 resources.Wherein, single carrier frequency division multiplex signal comprises data symbol and frequency pilot sign.

Step 102， base station utilizes the phase difference estimation frequency deviation value between the symbol that sends same signal in the single carrier frequency division multiplex signal receiving.

The single carrier frequency division multiplex signal sending due to subscriber equipment does not comprise the signal after time domain code division multiplexing, so base station can receive the single carrier frequency division multiplex signal that subscriber equipment sends, and according to the phase difference estimation frequency deviation value sending in this single carrier frequency division multiplex signal between the symbol of same signal.

In sum, the frequency deviation estimating method that the present embodiment provides, the resource mapping method that does not comprise time domain code division multiplexing by utilizing sends single carrier frequency division multiplex signal in PUCCH resource, make the base station side can be according to the phase difference estimation frequency deviation value sending in the single carrier frequency division multiplex signal receiving in PUCCH resource between the symbol of same signal, solved the problem that the base station side of UE under High-speed Circumstance and while only there is for a long time PUCCH scheduling cannot be carried out frequency deviation estimation, thereby reached base station side and can carry out frequency deviation estimation according to the reception signal of PUCCH, and carry out frequency deviation adjustment according to frequency offset estimation result, to increase the effect for demodulation performance and the system run all right of PUCCH.

Embodiment bis-

Please refer to Fig. 2, it shows the method flow diagram of the frequency deviation estimating method that the embodiment of the present invention two provides.The present embodiment be take and adopted PUCCH form 1/1a/1b delivery plan to describe as example, and this frequency deviation estimating method can comprise:

First be UE side processing procedure;

Step 201, when physical uplink control channel resource is PUCCH form 1/1a/1b resource, calculates the cyclically shifted sequences that corresponds respectively to data symbol and frequency pilot sign according to PUCCH form 1/1a/1b resource index;

Base station can be to user equipment allocation PUCCH form 1/1a/1b resource, and now, subscriber equipment can obtain indication and be mapped to the resource index in which PUCCH form 1/1a/1b resource

non-negative index value

represent in a time slot in maximum Physical Resource Block for transmitting the resource of PUCCH form 1/1a/1b.Because cyclic shift can change according to different symbols and time slot, for this reason, according to PUCCH form 1/1a/1b resource index

computation cycles shift sequence CS

specific as follows, order:

$N^{\&prime;}=\left\{\begin{array}{cc}{N}_{\mathrm{cs}}^{\left(1\right)}& \mathrm{if}{n}_{\mathrm{PUCCH}}^{(1,\tilde{p})}<N_{\mathrm{cs}}^{\left(1\right)}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}}\\ N_{\mathrm{sc}}^{\mathrm{RB}}& \mathrm{otherwise}\end{array}\right.$

Wherein,

for shift intervals,

for carry digit,

for the resource block size on frequency domain, with the form of subcarrier, represent.

The resource label that the fast middle PUCCH of two resources in two time slots of a subframe is mapped to is provided by following formula: work as n _smod2=0, has:

$n_{\tilde{p}}^{\&prime;}\left(n_s\right)=\left\{\begin{array}{cc}{n}_{\mathrm{PUCCH}}^{(1,\tilde{p})}& \mathrm{if}{n}_{\mathrm{PUCCH}}^{(1,\tilde{p})}<N_{\mathrm{cs}}^{\left(1\right)}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}}\\ (n_{\mathrm{PUCCH}}^{(1,\tilde{p})}-N_{\mathrm{cs}}^{\left(1\right)}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}})\mathrm{mod}(N_{\mathrm{sc}}^{\mathrm{RB}}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}})& \mathrm{otherwise}\end{array}\right.$

Work as n _smod2=1, has:

$n_{\tilde{p}}^{\&prime;}\left(n_s\right)=\left\{\begin{array}{cc}(n_{\tilde{p}}^{\&prime;}(n_s-1)+1)\mathrm{mod}(N_{\mathrm{sc}}^{\mathrm{RB}}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}}+1)-1& n_{\mathrm{PUCCH}}^{(1,\tilde{p})}\&GreaterEqual;N_{\mathrm{cs}}^{\left(1\right)}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}}\\ \left[h_{\tilde{p}}\right]+\left(h_{\tilde{p}}\mathrm{mod}1\right)N^{\&prime;}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}}& \mathrm{ctherwise}\end{array}\right.$

Wherein, n _sfor time slot sequence number,

to conventional CP d=2, to expansion CPd=0.The cyclic shift of the CS sequence that data symbol is corresponding for:

${\mathrm{\&alpha;}}_{\tilde{p}}(n_s,l)=2\mathrm{\&pi;}\&CenterDot;n_{\mathrm{cs}}^{\left(\tilde{p}\right)}(n_s,l)/N_{\mathrm{sc}}^{\mathrm{RB}}$

$n_{\mathrm{cs}}^{\left(\tilde{p}\right)}(n_s,l)=\left\{\begin{array}{cc}[n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)+(n_{\tilde{p}}^{\&prime;}\left(n_s\right)\&CenterDot;{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}})\mathrm{mod}{N}^{\&prime;}]\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}& \mathrm{for\; normal\; cyclic\; prefix}\\ [n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)+(n_{\tilde{p}}^{\&prime;}\left(n_s\right)\&CenterDot;{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}})\mathrm{mod}{N}^{\&prime;}]\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}& \mathrm{for\; extended\; cyclic\; prefix}\end{array}\right.$

By

obtain the corresponding CS sequence of data symbol

producing method is as follows:

$r_{u,v}^{\left(\mathrm{\&alpha;}\right)}\left(n\right)=e^{\mathrm{j\&alpha;n}}{\stackrel{\&OverBar;}{r}}_{u,v}\left(n\right),$ $0\&le;n<M_{\mathrm{sc}}^{\mathrm{RS}}---\left(1\right)$

On the other hand, the cyclic shift of the corresponding CS sequence of frequency pilot sign

for:

${\mathrm{\&alpha;}}_{\tilde{p}}(n_s,l)=2\mathrm{\&pi;}\&CenterDot;{\stackrel{\&OverBar;}{n}}_{\mathrm{cs}}^{\left(\tilde{p}\right)}(n_s,l)/N_{\mathrm{sc}}^{\mathrm{RB}}$

${\stackrel{\&OverBar;}{n}}_{\mathrm{cs}}^{\left(\tilde{p}\right)}(n_s,l)=\left\{\begin{array}{cc}[n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)+(n_{\tilde{p}}^{\&prime;}\left(n_s\right)\&CenterDot;{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}})\mathrm{mod}{N}^{\&prime;}]\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}& \mathrm{for\; normal\; cyclic\; prefix}\\ [n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)+(n_{\tilde{p}}^{\&prime;}\left(n_s\right)\&CenterDot;{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}})\mathrm{mod}{N}^{\&prime;}]\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}}& \mathrm{for\; extended\; cyclic\; prefix}\end{array}\right.$

By

obtain its corresponding CS sequence

the same formula of producing method (1).

Step 202, carries out spread spectrum according to cyclically shifted sequences to frequency pilot sign and data symbol, obtains the signal after spread spectrum;

PUCCH form 1/1a/1b resource is mainly used in UE to base station feedback reception condition, is also ACK(Acknowledgement, confirms symbol)/NACK(Non-Acknowledgement, deny symbol) information.

If the modulation symbol of ACK/NACK is d ₀, by the signal after CS sequence spread spectrum, can be expressed as

specifically be calculated as follows:

$y^{\left(\tilde{p}\right)}\left(n\right)=\frac{1}{\sqrt{P}}d\left(0\right)\&CenterDot;r_{u,v}^{\left({\mathrm{\&alpha;}}_{\tilde{p}}\right)}\left(n\right),$ $n=\mathrm{0,1},...,N_{\mathrm{seq}}^{\mathrm{PUCCH}}-1$

$z^{\left(\tilde{p}\right)}(m^{\&prime;}\&CenterDot;N_{\mathrm{SF}}^{\mathrm{PUCCH}}\&CenterDot;N_{\mathrm{seq}}^{\mathrm{PUCCH}}+m\&CenterDot;N_{\mathrm{seq}}^{\mathrm{PUCCH}}+n)=y^{\left(\tilde{p}\right)}\left(n\right)$

$m=0,...,N_{\mathrm{SF}}^{\mathrm{PUCCH}}-1$

$n=0,...,N_{\mathrm{seq}}^{\mathrm{PUCCH}}-1$

m'=0,1

Step 203, generates single carrier frequency division multiplex signal according to the signal after spread spectrum;

Signal after spread spectrum

by subcarrier shine upon, IFFT(Inverse Fast Fourier Transform, Fast Fourier Transform Inverse) convert, add CP(Cyclic prefix, Cyclic Prefix) generate single carrier frequency division multiplex signal, this step is prior art, relevant do not disclose details can be with reference to 3GPP agreement 36.211 related Sections.

Step 204, utilizes PUCCH form 1/1a/1b resource to send to base station single carrier frequency division multiplex signal.

The account form of PUCCH form 1/1a/1b place Physical Resource Block PRB is as follows:

$n_{\mathrm{PRB}}=\left\{\begin{array}{cc}\left[\frac{m}{2}\right]& \mathrm{if}(m+n_s\mathrm{mod}2)\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">mod</figure-callout>}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-1-\left[\frac{m}{2}\right]& \mathrm{if}(m+n_s\mathrm{mod}2)\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">mod</figure-callout>}2=1\end{array}\right.$

$m=\left\{\begin{array}{cc}{N}_{\mathrm{RB}}^{\left(2\right)}& \mathrm{if}{n}_{\mathrm{PUCCH}}^{(1,\tilde{p})}<N_{\mathrm{cs}}^{\left(1\right)}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}}\\ \left[\frac{n_{\mathrm{PUCCH}}^{(1,\tilde{p})}-N_{\mathrm{cs}}^{\left(1\right)}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}}}{N_{\mathrm{sc}}^{\mathrm{RB}}/{\mathrm{\&Delta;}}_{\mathrm{shift}}^{\mathrm{PUCCH}}}\right]+N_{\mathrm{RB}}^{\left(2\right)}+\left[\frac{N_{\mathrm{cs}}^{\left(1\right)}}{8}\right]& \mathrm{otherwise}\end{array}\right.$

Then be base station side processing procedure;

Step 205, processes the single carrier frequency division multiplex signal receiving to obtain receiving signal;

Base station side receives after the single carrier frequency division multiplex signal that subscriber equipment sends, and need to remove CP, do FFT(Fast Fourier Transform, fast Fourier transform) conversion and demapping etc. obtain reception signal.Specifically:

Suppose under conventional CP, N is that FFT counts, and CP length is N _g, N _s=N+N _g, the SC-FDMA symbolic number comprising in a descending time slot

suppose there is no multipath, desirable regularly, only have Gauss's white noise, the frequency deviation of establishing user m is ε _m, eNB noise is n ₁(n).

The single carrier frequency division multiplex signal receiving can be expressed as:

$r_l\left(n\right)={\&Sum;}_{m=0}^{M-1}{\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">e</figure-callout>}}^j{\&Sum;}_{k=0}^{N-1}{A}_{m,l}\left(k\right){\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">e</figure-callout>}}^j{e}^{\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}{\mathrm{\&epsiv;}}_m\frac{n}{N}}+n_l\left(n\right)$

A _{m, l}for the signal after spread spectrum

do the signal after subcarrier mapping.The single carrier frequency division multiplex signal receiving is removed to CP and does FFT(Fast Fourier Transform, fast Fourier transform) conversion, the reception signal on each subcarrier can be expressed as:

$R_l\left(k\right)={\&Sum;}_{n=0}^{N-1}{r}_l\left(n\right)e^{-\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}\frac{\mathrm{nk}}{N}}={\&Sum;}_{m=0}^{M-1}\left({\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">e</figure-callout>}}^j{A}_{m,l}\left(k\right)\mathrm{\&alpha;}\left(k\right)\right)+I_l\left(k\right)+u_l\left(k\right)---\left(13\right)$

Wherein, I _l(k) represent to disturb between user's intercarrier u _l(k) represent inter-user interference and noise, α (k) represents to be caused by inherent spurious frequency deviation the attenuation coefficient of signal on subcarrier, because residue synchronous error is less, thereby α (k) → 1.

Step 206, utilizes cyclically shifted sequences to carry out despreading to received signal, obtains the signal after despreading;

The account form of cyclically shifted sequences can be with reference to shown in above-mentioned steps.After multi-user's despreading, obtain the signal after despreading:

$B_{m,l}={\&Sum;}_{k=0}^{N-1}{R}_l\left(k\right)A_{m,l}^{*}\left(k\right)=12{\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">e</figure-callout>}}^j{S}_{m,l}+I_{m,l}+u_{m,l}$

Wherein,

$[S_{m,0},S_{m,1},\&CenterDot;\&CenterDot;\&CenterDot;,S_{m,2N_{\mathrm{symb}}^{\mathrm{UL}}-1}]=[d_0,{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">\; <figure-callout\; id="1"\; label="d"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">\; <figure-callout\; id="1"\; label="d"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">d</figure-callout>\; </figure-callout>\; </figure-callout>}}_0,\mathrm{1,1,1},d_0,d_0,d_0,{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">\; <figure-callout\; id="1"\; label="d"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">\; <figure-callout\; id="1"\; label="d"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">d</figure-callout>\; </figure-callout>\; </figure-callout>}}_0,\mathrm{1,1,1},d_0,d_0].$

For PUCCH form 1/1a/1b, under conventional CP, a subframe comprises two time slots, and each time slot comprises seven symbols.The 1st, 2,6 and 7 symbols in each time slot are data symbol d ₀, the 3rd, 4 and 5 symbols in each time slot are frequency pilot signs 1.

Step 207, utilizes and in the signal after despreading, sends the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol.

If l ₁and l ₂constantly send identical S _{m, l}, its corresponding B _{m, l}there is fixing phase difference, utilize this phase difference can carry out frequency deviation estimation.According to S _{m, l}the difference of selecting, the present embodiment provides 2 kinds of frequency deviations and estimates mode, below according to being described below respectively under different CP:

Under conventional CP frame structure, a subframe comprises two time slots, and each time slot comprises seven symbols.The 1st, 2,6 and 7 symbols in each time slot are data symbol d ₀, the 3rd, 4 and 5 symbols in each time slot are frequency pilot signs 1.

First kind of way, utilizes adjacent pilot symbols in the signal after despreading and/or the phase difference estimation frequency deviation estimated value between adjacent data symbol.

Incorporated by reference to reference to figure 3A, it shows the Frequency Estimation schematic diagram of the first kind of way that the present embodiment provides.In figure, only show the example of a time slot, another time slot has identical structure.Wherein, the phase difference between adjacent data symbol and adjacent frequency pilot sign can be used for estimating frequency offset estimated value.Specifically:

To a PUCCH form 1/1a/1b resource, establish the set that C represents all adjacent frequency pilot signs and data symbol, the frequency deviation estimated value of user m can obtain by expression formula below:

${\mathrm{\&epsiv;}}_m=\frac{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">N</figure-callout>}}{2\mathrm{\&pi;}{N}_s}\mathrm{angle}\left\{{\&Sum;}_{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_2\&Element;c\frac{B_{m,l_2}}{B_{m,l_1}}}\right\}$

The second way, utilizes phase difference estimation the first frequency deviation estimated value between adjacent pilot symbols in the signal after despreading and/or adjacent data symbol; Utilize phase difference estimation the second frequency deviation estimated value between the data symbol that is spaced apart 5 in the signal after despreading; According to the first frequency deviation estimated value and the second frequency deviation estimated value, estimate final frequency deviation estimated value.

Incorporated by reference to reference to figure 3B, it shows the Frequency Estimation schematic diagram of the second way that the present embodiment provides.The second way estimates for " thick frequency deviation+smart frequency deviation " a kind of mode combining.That is to say, in order to improve frequency offset estimation accuracy, first can utilize adjacent frequency pilot sign and/or adjacent data symbol to carry out thick frequency deviation estimation, as shown in figure 1., the data symbol of 5 symbols in recycling interval carries out smart frequency deviation estimation, as shown in figure 2., finally by filtering, obtain actual frequency deviation estimated value.

Specifically, to a PUCCH form 1/1a/1b resource, establish C ₁represent all adjacent frequency pilot signs and data symbol set, C ₂represent the data symbol set of 5 symbols in interval, the first frequency deviation estimated value of user m can obtain by expression formula below:

${\mathrm{\&epsiv;}}_{m,1}=\frac{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">N</figure-callout>}}{2\mathrm{\&pi;}{N}_s}\mathrm{angle}\left\{{\&Sum;}_{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_2\&Element;c_1\frac{B_{m,l_2}}{B_{m,l_1}}}\right\}$

The second frequency deviation estimated value of user m can obtain by expression formula below:

${\mathrm{\&epsiv;}}_{m,2}=\frac{N}{10\mathrm{\&pi;}{N}_s}\mathrm{angle}\left\{{\&Sum;}_{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_2\&Element;c_2\frac{B_{m,l_2}}{B_{m,l_1}}}\right\}$

The final frequency deviation estimated value of user m can be expressed as:

ε _m＝αε _m，1+ε _m，2

Wherein, 0 < α < 1.

In addition on the one hand, under expansion CP frame structure, a subframe comprises two time slots, and each time slot comprises six symbols.The 1st, 2,5 and 6 symbols in each time slot are data symbol d ₀, the 3rd in each time slot and 4 symbols are frequency pilot signs 1.

First kind of way, utilizes adjacent pilot symbols in the signal after despreading and/or the phase difference estimation frequency deviation estimated value between adjacent data symbol.

Incorporated by reference to reference to figure 3C, it shows the Frequency Estimation schematic diagram of the first kind of way that the present embodiment provides.In figure, only show the example of a time slot, another time slot has identical structure.Wherein, the phase difference between adjacent data symbol and adjacent frequency pilot sign can be used for estimating frequency offset estimated value.Respective formula can be with reference to foregoing.

The second way, utilizes phase difference estimation the first frequency deviation estimated value between adjacent pilot symbols in the signal after despreading and/or adjacent data symbol; Utilize phase difference estimation the second frequency deviation estimated value between the data symbol that is spaced apart 5 in the signal after despreading; According to the first frequency deviation estimated value and the second frequency deviation estimated value, estimate final frequency deviation estimated value.

Incorporated by reference to reference to figure 3D, it shows the Frequency Estimation schematic diagram of the second way that the present embodiment provides.The second way estimates for " thick frequency deviation+smart frequency deviation " a kind of mode combining.That is to say, in order to improve frequency offset estimation accuracy, first can utilize adjacent frequency pilot sign and/or adjacent data symbol to carry out thick frequency deviation estimation, as shown in figure 3., the data symbol of 4 symbols in recycling interval carries out smart frequency deviation estimation, as shown in figure 4., finally by filtering, obtain actual frequency deviation estimated value.Respective formula can be with reference to foregoing.

It should be added that the letter clearly not indicating or expression formula implication can be consulted 3GPP agreement 36.211 related Sections herein.This is part well-known to those skilled in the art, repeats no longer one by one.

In sum, the frequency deviation estimating method that the present embodiment provides, the resource mapping method that does not comprise time domain code division multiplexing by utilizing sends single carrier frequency division multiplex signal in PUCCH form 1/1a/1b resource, make the base station side can be according to the phase difference estimation frequency deviation value sending in the single carrier frequency division multiplex signal receiving in PUCCH form 1/1a/1b resource between the symbol of same signal, solved the problem that the base station side of UE under High-speed Circumstance and while only there is for a long time PUCCH scheduling cannot be carried out frequency deviation estimation, thereby reached base station side and can carry out frequency deviation estimation according to the reception signal of PUCCH, and carry out frequency deviation adjustment according to frequency offset estimation result, to increase the effect for demodulation performance and the system run all right of PUCCH.

Embodiment tri-

Please refer to Fig. 4, it shows the method flow diagram of the frequency deviation estimating method that the embodiment of the present invention three provides.The present embodiment be take and adopted PUCCH form 3 delivery plans to describe as example, and this frequency deviation estimating method can comprise:

Step 401, when physical uplink control channel resource is PUCCH form 3 resource, calculates the cyclically shifted sequences corresponding to frequency pilot sign according to PUCCH form 3 resource indexs;

For PUCCH form 3, available technology adopting OC code is distinguished to realize multiplexing to different user, cancels the multiplexing link of OC code in the present embodiment, and a Resource Block is only for transmitting a user's data.

Base station can be to user equipment allocation PUCCH form 3 resources, and now, subscriber equipment can obtain resource index.If PUCCH form 3 resource indexs

the CS sequence that frequency pilot sign is corresponding

producing method is as follows, order:

${\mathrm{\&alpha;}}_{\tilde{p}}(n_s,l)=2\mathrm{\&pi;}\&CenterDot;n_{\mathrm{cs}}^{\left(\tilde{p}\right)}(n_s,l)/N_{\mathrm{sc}}^{\mathrm{RB}}$

$n_{\mathrm{cs}}^{\tilde{p}}(n_s,l)=n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)\mathrm{mod}{N}_{\mathrm{sc}}^{\mathrm{RB}},$

Again by

generate

producing method is as follows:

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

Step 402, carries out spread spectrum according to cyclically shifted sequences to frequency pilot sign but does not carry out frequency division multiplexing, obtains the frequency pilot sign after spread spectrum; After data symbol and predetermined phase are multiplied each other, carry out discrete Fourier transform, obtain the data symbol after Fourier transform;

The part of frequency pilot sign being carried out to spread spectrum according to cyclically shifted sequences repeats no more, and simultaneously owing to only transmitting a user's data, now frequency pilot sign does not need to carry out frequency division multiplexing yet.For data symbol:

If the data symbol after coded modulation is d (0) ..., d (M _symb-1),

to data symbol and predetermined phase

multiply each other, order:

$y_n^{\left(\tilde{p}\right)}\left(i\right)=\left\{\begin{array}{cc}{e}^{\mathrm{j\&pi;}[n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)/64]/2}\&CenterDot;d\left(i\right)& n<N_{\mathrm{SF},0}^{\mathrm{PUCCH}}\\ e^{\mathrm{j\&pi;}[n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)/64]/2}\&CenterDot;d(N_{\mathrm{sc}}^{\mathrm{RB}}+i)& \mathrm{otherwise}\end{array}\right.$

$\stackrel{\&OverBar;}{n}=n\mathrm{mod}{N}_{\mathrm{SF},0}^{\mathrm{PUCCH}}$

$N=0,...,N_{\mathrm{SF},0}^{\mathrm{PUCCH}}+N_{\mathrm{SF},1}^{\mathrm{PUCCH}}-1$

$i=\mathrm{0,1},...,N_{\mathrm{sc}}^{\mathrm{RB}}-1$

Wherein,

then carry out DFT(Discrete Fourier Transform, discrete Fourier transform) conversion, obtain the data symbol after Fourier transform:

$z^{\left(\tilde{p}\right)}(n\&CenterDot;N_{\mathrm{sc}}^{\mathrm{RB}}+k)=\frac{1}{\sqrt{P}}\frac{1}{\sqrt{N_{\mathrm{sc}}^{\mathrm{RB}}}}\underset{i=0}{\overset{N_{\mathrm{sc}}^{\mathrm{RB}}-1}{\mathrm{\&Sigma;}}}{y}_n^{\left(\tilde{p}\right)}\left(i\right)e^{-\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">j</figure-callout>}\frac{2\mathrm{\&pi;ik}}{N_{\mathrm{sc}}^{\mathrm{RB}}}}$

$k=0,...,N_{\mathrm{sc}}^{\mathrm{RB}}-1$

$n=0,...,N_{\mathrm{SF},0}^{\mathrm{PUCCH}}+N_{\mathrm{SF},1}^{\mathrm{PUCCH}}-1$

Step 403, generates single carrier frequency division multiplex signal according to the frequency pilot sign after spread spectrum and the data symbol after Fourier transform;

by subcarrier, shone upon, IFFT conversion, added CP and generate single carrier frequency division multiplex signal, this step is prior art, relevant do not disclose details can be with reference to 3GPP agreement 36.211 related Sections.

Step 404, utilizes PUCCH form 3 resources to send to base station single carrier frequency division multiplex signal.The account form of PUCCH form 3 place Physical Resource Block PRB is as follows:

$n_{\mathrm{PRB}}=\left\{\begin{array}{cc}\left[\frac{m}{2}\right]& \mathrm{if}(m+n_s\mathrm{mod}2)\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">mod</figure-callout>}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-1-\left[\frac{m}{2}\right]& \mathrm{if}(m+n_s\mathrm{mod}2)\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">mod</figure-callout>}2=1\end{array}\right.---\left(1\right)$

$m=n_{\mathrm{PUCCH}}^{(3,\tilde{p})}$

Base station side processing procedure below;

Step 405, processes the single carrier frequency division multiplex signal receiving to obtain receiving signal;

Base station side receives after the single carrier frequency division multiplex signal that subscriber equipment sends, and need to remove CP, do FFT(Fast Fourier Transform, fast Fourier transform) conversion and demapping etc. obtain reception signal.Specifically:

Suppose under conventional CP, establishing N is that FFT counts, and CP length is N _g, N _s=N+N _g,

suppose there is no multipath, desirable regularly, only have Gauss's white noise, the frequency deviation of establishing user m is ε _m, eNB noise is n ₁(n).

The single carrier frequency division multiplex signal receiving can be expressed as:

$r_l\left(n\right)={\&Sum;}_{m=0}^{M-1}{\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">e</figure-callout>}}^j{\&Sum;}_{k=0}^{N-1}{A}_{m,l}\left(k\right){\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">e</figure-callout>}}^j{e}^{\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}{\mathrm{\&epsiv;}}_m\frac{n}{N}}+n_l\left(n\right)$

Wherein, A _{m, l}for signal do the signal after subcarrier mapping.Due to now, in a Resource Block, only comprise a user's data, the reception data of this user place Resource Block are only included to this user's information, the subcarrier set of establishing user m place is B _m, now receive signal for having:

$R_l{\left(k\right)}_{k\&Element;B_m}=e^{\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}{\mathrm{\&epsiv;}}_m\frac{N_g+l{N}_s}{N}}{A}_{m,l}\left(k\right)\mathrm{\&alpha;}\left(k\right)+I_l\left(k\right)+u_l\left(k\right)$

Step 406, the pilot frequency locations in to received signal utilizes cyclically shifted sequences to be correlated with, the frequency pilot sign after being correlated with; Data Position to received signal utilizes the conjugation of predetermined phase to multiply each other, the data symbol after being correlated with.

For the pilot frequency locations receiving in signal, still can utilize corresponding cyclically shifted sequences

carry out correlation demodulation, the frequency pilot sign after being correlated with.Data Position to received signal utilizes predetermined phase

conjugation multiply each other, the data symbol after being correlated with.Also pass through C _{m, l}to R _l(k) process C _{m, l}specific as follows:

$[C_{m,0},C_{m,1},...,C_{m,2N_{\mathrm{symb}}^{\mathrm{UL}}-1}]=$

$[{\mathrm{\&beta;}}_{\mathrm{0,0}},{\mathrm{\&gamma;}}_{n_s,1}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{0,2}},{\mathrm{\&beta;}}_{\mathrm{0,3}},{\mathrm{\&beta;}}_{\mathrm{0,4}},{\mathrm{\&gamma;}}_{n_s,5}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{0,6}},{\mathrm{\&gamma;}}_{n_s+\mathrm{1,1}}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{1,2}},{\mathrm{\&beta;}}_{\mathrm{1,3}},{\mathrm{\&beta;}}_{\mathrm{1,4}},{\mathrm{\&gamma;}}_{n_s+\mathrm{1,5}}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{1,6}}]$

Wherein, ${\mathrm{\&beta;}}_{\left(n_s\right)\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">mod</figure-callout>}2,l}=e^{-\mathrm{j\&pi;}[n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)/64]/2},$ ${\mathrm{\&gamma;}}_{u,v}\left(k\right)={\mathrm{\&gamma;}}_{u,v}^{\left({\mathrm{\&alpha;}}_{\tilde{p}}(n_s,l)\right)}$ （（k）mod12）。

For PUCCH form 3, under conventional CP, a subframe comprises two time slots, and each time slot comprises seven symbols.The 1st, 3,4,5 and 7 symbols in each time slot are data symbols, and the 2nd in each time slot and 6 symbols are frequency pilot signs.

Step 407, utilizes and sends the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol.

If l ₁and l ₂constantly send identical signal, its corresponding symbol has fixing phase difference, utilizes this phase difference can carry out frequency deviation estimation.The difference of selecting according to identical signal, the present embodiment provides by 2 kinds of frequency deviations estimates mode, below according to being described below respectively under different CP:

Under conventional CP, a subframe comprises two time slots, and each time slot comprises seven symbols.The 1st, 3,4,5 and 7 symbols in each time slot are data symbols, and the 2nd in each time slot and 6 symbols are frequency pilot signs.

First kind of way, utilizes and to be spaced apart 4 frequency pilot sign and/or to be spaced apart the phase difference estimation frequency deviation estimated value between 4 data symbol.

Incorporated by reference to reference to figure 5A, it shows the Frequency Estimation schematic diagram of the first kind of way that the present embodiment provides.Wherein, be spaced apart 4 data symbol and be spaced apart phase difference between 4 frequency pilot sign and can be used for estimating frequency offset estimated value.Specifically,

To PUCCH form 3 resources, to establish C and represent all be spaced apart 4 frequency pilot sign and data symbol set, the frequency deviation estimated value of user m can obtain by expression formula below:

${\mathrm{\&epsiv;}}_m=\frac{N}{8\mathrm{\&pi;}{N}_s}\mathrm{angle}\left\{{\&Sum;}_{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_2\&Element;c}{\&Sum;}_{k\&Element;B_m}\frac{R_{m,l_2}\left(k\right)*C_{m,l_2}}{R_{m,l_1}\left(k\right)*C_{m,l_1}}\right\}$

Wherein,

$[C_{m,0},C_{m,1},...,C_{m,2N_{\mathrm{symb}}^{\mathrm{UL}}-1}]=$

$[{\mathrm{\&beta;}}_{\mathrm{0,0}},{\mathrm{\&gamma;}}_{n_s,1}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{0,2}},{\mathrm{\&beta;}}_{\mathrm{0,3}},{\mathrm{\&beta;}}_{\mathrm{0,4}},{\mathrm{\&gamma;}}_{n_s,5}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{0,6}},{\mathrm{\&gamma;}}_{n_s+\mathrm{1,1}}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{1,2}},{\mathrm{\&beta;}}_{\mathrm{1,3}},{\mathrm{\&beta;}}_{\mathrm{1,4}},{\mathrm{\&gamma;}}_{n_s+\mathrm{1,5}}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{1,6}}]$

Wherein, ${\mathrm{\&beta;}}_{\left(n_s\right)\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">mod</figure-callout>}2,l}=e^{-\mathrm{j\&pi;}[n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)/64]/2},$ ${\mathrm{\&gamma;}}_{u,v}\left(k\right)={\mathrm{\&gamma;}}_{u,v}^{\left({\mathrm{\&alpha;}}_{\tilde{p}}(n_s,l)\right)}$ （（k）mod12）。

The second way, utilizes phase difference estimation the 3rd frequency deviation estimated value between the data symbol that is spaced apart 2; Utilization is spaced apart 4 frequency pilot sign and/or is spaced apart phase difference estimation the 4th frequency deviation estimated value between 4 data symbol; According to the 3rd frequency deviation estimated value and the 4th frequency deviation estimated value, estimate final frequency deviation estimated value.

Incorporated by reference to reference to figure 5B, it shows the Frequency Estimation schematic diagram of the second way that the present embodiment provides.The second way estimates for " thick frequency deviation+smart frequency deviation " a kind of mode combining.That is to say, in order to improve frequency offset estimation accuracy, first can utilize and be spaced apart 2 data symbol and carry out thick frequency deviation estimation, as shown in figure 1., frequency pilot sign and/or the data symbol of 4 symbols in recycling interval carry out smart frequency deviation estimation, as shown in figure 2., finally by filtering, obtain actual frequency deviation estimated value.Specifically:

To PUCCH form 3 resources, establish C ₁represent all 2 set, C of being spaced apart ₂the data acquisition system that represents 4 symbols in interval, the 3rd frequency deviation estimated value of user m can obtain by expression formula below:

${\mathrm{\&epsiv;}}_{m,1}=\frac{\mathrm{<figure-callout\; id="4"\; label="N"\; filenames="2012102053521100003DEST\_PATH\_IMAGE002.png,2012102053521100003DEST\_PATH\_IMAGE004.png"\; state="\{\{state\}\}">N</figure-callout>}}{4\mathrm{\&pi;}{N}_s}\mathrm{angle}\left\{{\&Sum;}_{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_2\&Element;{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">c</figure-callout>}}_1}{\&Sum;}_{k\&Element;B_m}\frac{R_{m,l_2}\left(k\right)*C_{m,l_2}}{R_{m,l_1}\left(k\right)*C_{m,l_1}}\right\}$

The 4th frequency deviation estimated value of user m can obtain by expression formula below:

${\mathrm{\&epsiv;}}_{m,1}=\frac{N}{8\mathrm{\&pi;}{N}_s}\mathrm{angle}\left\{{\&Sum;}_{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">l</figure-callout>}}_2\&Element;{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">c</figure-callout>}}_1}{\&Sum;}_{k\&Element;B_m}\frac{R_{m,l_2}\left(k\right)*C_{m,l_2}}{R_{m,l_1}\left(k\right)*C_{m,l_1}}\right\}$

Wherein,

$[C_{m,0},C_{m,1},...,C_{m,2N_{\mathrm{symb}}^{\mathrm{UL}}-1}]=$

$[{\mathrm{\&beta;}}_{\mathrm{0,0}},{\mathrm{\&gamma;}}_{n_s,1}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{0,2}},{\mathrm{\&beta;}}_{\mathrm{0,3}},{\mathrm{\&beta;}}_{\mathrm{0,4}},{\mathrm{\&gamma;}}_{n_s,5}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{0,6}},{\mathrm{\&gamma;}}_{n_s+\mathrm{1,1}}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{1,2}},{\mathrm{\&beta;}}_{\mathrm{1,3}},{\mathrm{\&beta;}}_{\mathrm{1,4}},{\mathrm{\&gamma;}}_{n_s+\mathrm{1,5}}\left(k\right),{\mathrm{\&beta;}}_{\mathrm{1,6}}]$

Wherein, ${\mathrm{\&beta;}}_{\left(n_s\right)\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="2012102053521100003DEST\_PATH\_IMAGE003.png"\; state="\{\{state\}\}">mod</figure-callout>}2,l}=e^{-\mathrm{j\&pi;}[n_{\mathrm{cs}}^{\mathrm{cell}}(n_s,l)/64]/2},$ ${\mathrm{\&gamma;}}_{u,v}\left(k\right)={\mathrm{\&gamma;}}_{u,v}^{\left({\mathrm{\&alpha;}}_{\tilde{p}}(n_s,l)\right)}$ （（k）mod12）。

The final frequency deviation estimated value of user m can be expressed as:

ε _m＝αε _m，1+ε _m，2

Wherein, 0 < α < 1.

Under expansion CP, a subframe comprises two time slots, and each time slot comprises six symbols.The 1st, 2,3,5 and 6 symbols in each time slot are data symbols, and the 4th symbol in each time slot is frequency pilot sign.

First kind of way, utilizes the phase difference estimation frequency deviation estimated value between the data symbol that is spaced apart 4.

Incorporated by reference to reference to figure 5C, it shows the Frequency Estimation schematic diagram of the first kind of way that the present embodiment provides.Wherein, be spaced apart phase difference between 2 data symbol and can be used for estimating frequency offset estimated value.

The second way, utilizes phase difference estimation the 3rd frequency deviation estimated value between the data symbol that is spaced apart 2; Utilization is spaced apart phase difference estimation the 4th frequency deviation estimated value between 4 data symbol; According to the 3rd frequency deviation estimated value and the 4th frequency deviation estimated value, estimate final frequency deviation estimated value.

Incorporated by reference to reference to figure 5D, it shows the Frequency Estimation schematic diagram of the second way that the present embodiment provides.The second way estimates for " thick frequency deviation+smart frequency deviation " a kind of mode combining.That is to say, in order to improve frequency offset estimation accuracy, first can utilize to be spaced apart 2 data symbol and to carry out thick frequency deviation estimation, as shown in figure 3., the data symbol of 4 symbols in recycling interval carries out smart frequency deviation estimation, as shown in figure 4., finally by filtering, obtains actual frequency deviation estimated value.

In sum, the frequency deviation estimating method that the present embodiment provides, the resource mapping method that does not comprise time domain code division multiplexing by utilizing sends single carrier frequency division multiplex signal in PUCCH resource, make the base station side can be according to the phase difference estimation frequency deviation value sending in the single carrier frequency division multiplex signal receiving in PUCCH resource between the symbol of same signal, solved the problem that the base station side of UE under High-speed Circumstance and while only there is for a long time PUCCH scheduling cannot be carried out frequency deviation estimation, thereby reached base station side and can carry out frequency deviation estimation according to the reception signal of PUCCH, and carry out frequency deviation adjustment according to frequency offset estimation result, to increase the effect for demodulation performance and the system run all right of PUCCH.

Embodiment tetra-

Please refer to Fig. 6, it shows the block diagram of the frequency deviation estimating system that the embodiment of the present invention four provides.This frequency deviation estimating system comprises subscriber equipment 620He base station 640.

Subscriber equipment 620 is for utilizing predetermined resource mapping mode to send single carrier frequency division multiplex signal in row control channel resource physically, and predetermined resource mapping mode does not comprise time domain code division multiplexing;

Base station 640 is for utilizing the single carrier frequency division multiplex signal receiving to send the phase difference estimation frequency deviation value between the symbol of same signal;

Wherein, single carrier frequency division multiplex signal comprises data symbol and frequency pilot sign.

When physical uplink control channel resource is PUCCH form 1/1a/1b resource,

Specifically, subscriber equipment 620 can specifically comprise: the first computing module 622, the first spread spectrum module 624, the first generation module 626 and the first sending module 628, as shown in Figure 7.Wherein.The first computing module 622 when when physical uplink control channel resource being PUCCH form 1/1a/1b resource, calculates the cyclically shifted sequences that corresponds respectively to data symbol and frequency pilot sign according to PUCCH form 1/1a/1b resource index; The first spread spectrum module 624, for according to cyclically shifted sequences, frequency pilot sign and data symbol being carried out to spread spectrum, obtains the signal after spread spectrum; The first generation module 626 is for generating single carrier frequency division multiplex signal according to the signal after spread spectrum; The first sending module 628 is for utilizing single carrier frequency division multiplex signal PUCCH form 1/1a/1b resource to send to base station 640.

Specifically, base station 640 can specifically comprise: the first processing module 642, the first despreading module 644 and the first estimation module 646, as shown in Figure 8.Wherein, the first processing module 642 is for processing the single carrier frequency division multiplex signal receiving to obtain receiving signal; The first despreading module 644, for utilizing to received signal cyclically shifted sequences to carry out despreading, obtains the signal after despreading; The first estimation module 646 is for utilizing the signal after despreading to send the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol.

Say further, the first estimation module 646 can specifically comprise: adjacent estimation unit 646a, as shown in Figure 9.Wherein, adjacent estimation unit 646a is for utilizing the signal after despreading to send the adjacent pilot symbols of same signal and/or the phase difference calculating frequency deviation estimated value between adjacent data symbol.

Or the first estimation module 646 can specifically comprise: the first rough estimate unit 646b, the first Jing Gu unit 646c and the first filter unit 646d, as shown in figure 10.Wherein, the first rough estimate unit 646b is for utilizing signal after despreading to send adjacent pilot symbols and/or the first frequency deviation estimated value of the phase difference calculating between adjacent data symbol of same signal; The first Jing Gu unit 646c is for when conventional CP frame structure, utilizes phase difference estimation the second frequency deviation estimated value between 5 data symbol that is spaced apart in the signal after despreading; Or, when expansion CP frame structure, utilize phase difference estimation the second frequency deviation estimated value between 4 data symbol that is spaced apart in the signal after despreading; The first filter unit 646d is for estimating final frequency deviation estimated value according to the first frequency deviation estimated value and the second frequency deviation estimated value.

When physical uplink control channel resource is PUCCH form 3 resource,

Specifically, subscriber equipment 620 can specifically comprise: the second computing module 621, the second spread spectrum module 623a, discrete transform module 623b, the second generation module 625 and the second sending module 627, as shown in figure 11.The second computing module 621 when being PUCCH form 3 resource when physical uplink control channel resource, calculates the cyclically shifted sequences corresponding to frequency pilot sign according to PUCCH form 3 resource indexs; The second spread spectrum module 623a, for according to cyclically shifted sequences, frequency pilot sign being carried out to spread spectrum but not carrying out frequency division multiplexing, obtains the frequency pilot sign after spread spectrum; Discrete transform module 623b carries out discrete Fourier transform after data symbol and predetermined phase are multiplied each other, and obtains the data symbol after Fourier transform; The second generation module 625 is for generating single carrier frequency division multiplex signal according to the frequency pilot sign after spread spectrum and the data symbol after Fourier transform; The second sending module 627 is for utilizing single carrier frequency division multiplex signal PUCCH form 3 resources to send to base station.

Specifically, base station 640 can specifically comprise: the second processing module 641, pilot tone processing module 643a, data processing module 643b and the second estimation module 645, as shown in figure 12.Wherein, the second processing module 641 is processed and is obtained receiving signal for the single carrier frequency division multiplex signal to receiving; Pilot tone processing module 643a utilizes cyclically shifted sequences to be correlated with for pilot frequency locations to received signal, the frequency pilot sign after being correlated with; Data processing module 643b utilizes the conjugation of predetermined phase to multiply each other for Data Position to received signal, the data symbol after being correlated with; The second estimation module 645 sends the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol for utilizing.

Further, the second estimation module 645 can specifically comprise: interval estimation unit 645a, as shown in figure 13.Wherein, interval estimation unit 645a is for when conventional CP frame structure, and utilization is spaced apart 4 frequency pilot sign and/or is spaced apart the phase difference estimation frequency deviation estimated value between 4 data symbol; Maybe, when expansion CP frame structure, utilize the phase difference estimation frequency deviation estimated value between the data symbol that is spaced apart 4.

The second estimation module 645 can specifically comprise: the second rough estimate unit 645b, the second Jing Gu unit 645c and the second filter unit 645d, as shown in figure 14.Wherein, the second rough estimate unit 645b is for being spaced apart phase difference estimation the 3rd frequency deviation estimated value between 2 data symbol; The second Jing Gu unit 645c is for when conventional CP frame structure, and utilization is spaced apart 4 frequency pilot sign and/or is spaced apart phase difference estimation the 4th frequency deviation estimated value between 4 data symbol; Or, when expansion CP frame structure, utilize phase difference estimation the 4th frequency deviation estimated value between the data symbol that is spaced apart 4; The second filter unit 645d is for estimating final frequency deviation estimated value according to the 3rd frequency deviation estimated value and the 4th frequency deviation estimated value.

In sum, the frequency deviation estimating system that the present embodiment provides, the resource mapping method that does not comprise time domain code division multiplexing by utilizing sends single carrier frequency division multiplex signal in PUCCH resource, make the base station side can be according to the phase difference calculating frequency deviation value sending in the single carrier frequency division multiplex signal receiving in PUCCH resource between the symbol of same signal, solved the problem that the base station side of UE under High-speed Circumstance and while only there is for a long time PUCCH scheduling cannot be carried out frequency deviation estimation, thereby reached base station side and can carry out frequency deviation estimation according to the reception signal of PUCCH, and carry out frequency deviation adjustment according to frequency offset estimation result, to increase the effect for demodulation performance and the system run all right of PUCCH.

It should be noted that: the frequency deviation estimating system that above-described embodiment provides is when frequency deviation is estimated, only the division with above-mentioned each functional module is illustrated, in practical application, can above-mentioned functions be distributed and by different functional modules, completed as required, the internal structure that is about to device is divided into different functional modules, to complete all or part of function described above.In addition, frequency deviation estimating system and frequency deviation estimating method embodiment that above-described embodiment provides belong to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.

One of ordinary skill in the art will appreciate that all or part of step that realizes above-described embodiment can complete by hardware, also can come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (18)

1. a frequency deviation estimating method, is characterized in that, described method comprises:

Subscriber equipment utilizes predetermined resource mapping mode in row control channel resource, to send single carrier frequency division multiplex signal physically, and described predetermined resource mapping mode does not comprise time domain code division multiplexing;

Base station utilizes the phase difference estimation frequency deviation value between the symbol that sends same signal in the described single carrier frequency division multiplex signal receiving.

2. frequency deviation estimating method according to claim 1, is characterized in that, described single carrier frequency division multiplex signal comprises data symbol and frequency pilot sign;

Described subscriber equipment utilizes predetermined resource mapping mode in row control channel resource, to send single carrier frequency division multiplex signal physically, and described predetermined resource mapping mode does not comprise time domain code division multiplexing, specifically comprises:

When described physical uplink control channel resource is PUCCH form 1/1a/1b resource, according to described PUCCH form 1/1a/1b resource index, calculate the cyclically shifted sequences that corresponds respectively to described data symbol and frequency pilot sign;

According to described cyclically shifted sequences, described data symbol and frequency pilot sign are carried out to spread spectrum, obtain the signal after spread spectrum;

According to the signal after described spread spectrum, generate single carrier frequency division multiplex signal;

Utilize described PUCCH form 1/1a/1b resource to send to described base station described single carrier frequency division multiplex signal.

3. frequency deviation estimating method according to claim 2, is characterized in that, described base station utilizes the phase difference estimation frequency deviation value between the symbol that sends same signal in the described single carrier frequency division multiplex signal receiving, and specifically comprises:

The described single carrier frequency division multiplex signal receiving is processed and obtained receiving signal;

To described reception signal, utilize described cyclically shifted sequences to carry out despreading, obtain the signal after despreading;

Utilize and in the signal after described despreading, send the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol.

4. frequency deviation estimating method according to claim 3, is characterized in that, sends the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol in the described signal utilizing after described despreading, specifically comprises:

Utilize adjacent pilot symbols in the signal after described despreading and/or the phase difference estimation frequency deviation estimated value between adjacent data symbol.

5. frequency deviation estimating method according to claim 3, is characterized in that, sends the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol in the described signal utilizing after described despreading, specifically comprises:

Utilize adjacent pilot symbols and/or the first frequency deviation estimated value of the phase difference estimation between adjacent data symbol in the signal after described despreading;

When conventional CP frame structure, utilize phase difference estimation the second frequency deviation estimated value between 5 data symbol that is spaced apart in the signal after described despreading; Or, when expansion CP frame structure, utilize phase difference estimation the second frequency deviation estimated value between 4 data symbol that is spaced apart in the signal after described despreading;

According to described the first frequency deviation estimated value and the second frequency deviation estimated value, estimate final frequency deviation estimated value.

6. frequency deviation estimating method according to claim 1, is characterized in that, described single carrier frequency division multiplex signal comprises data symbol and frequency pilot sign;

Described subscriber equipment utilizes predetermined resource mapping mode in row control channel resource, to send single carrier frequency division multiplex signal physically, and described predetermined resource mapping mode does not comprise time domain code division multiplexing, specifically comprises:

When described physical uplink control channel resource is PUCCH form 3 resource, according to described PUCCH form 3 resource indexs, calculate the cyclically shifted sequences corresponding to described frequency pilot sign;

According to described cyclically shifted sequences, described frequency pilot sign carried out to spread spectrum but do not carry out frequency division multiplexing, obtaining the frequency pilot sign after spread spectrum;

After described data symbol and predetermined phase are multiplied each other, carry out discrete Fourier transform, obtain the data symbol after Fourier transform;

According to the data symbol after the frequency pilot sign after described spread spectrum and described Fourier transform, generate single carrier frequency division multiplex signal;

Utilize described PUCCH form 3 resources to send to described base station described single carrier frequency division multiplex signal.

7. frequency deviation estimating method according to claim 6, is characterized in that, described base station utilizes the phase difference estimation frequency deviation value between the symbol that sends same signal in the described single carrier frequency division multiplex signal receiving, and specifically comprises:

The described single carrier frequency division multiplex signal receiving is processed and obtained receiving signal;

To the pilot frequency locations in described reception signal, utilize described cyclically shifted sequences to be correlated with, the described frequency pilot sign after being correlated with;

To the Data Position in described reception signal, utilize the conjugation of described predetermined phase to multiply each other, the described data symbol after being correlated with;

Utilize and send the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol.

8. frequency deviation estimating method according to claim 7, is characterized in that, described utilization sends the described frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between described data symbol, specifically comprises:

When conventional CP frame structure, utilize and to be spaced apart 4 frequency pilot sign and/or to be spaced apart the phase difference estimation frequency deviation estimated value between 4 data symbol;

When expansion CP frame structure, utilize the phase difference estimation frequency deviation estimated value between the data symbol that is spaced apart 4.

9. frequency deviation estimating method according to claim 7, is characterized in that, sends the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol in the described signal utilizing after described despreading, specifically comprises:

Utilization is spaced apart phase difference estimation the 3rd frequency deviation estimated value between 2 data symbol;

When conventional CP frame structure, utilize and to be spaced apart 4 frequency pilot sign and/or to be spaced apart phase difference estimation the 4th frequency deviation estimated value between 4 data symbol; Or, when expansion CP frame structure, utilize phase difference estimation the 4th frequency deviation estimated value between the data symbol that is spaced apart 4;

According to described the 3rd frequency deviation estimated value and the 4th frequency deviation estimated value, estimate final frequency deviation estimated value.

10. a frequency deviation estimating system, is characterized in that, described system comprises:

Subscriber equipment, for utilizing predetermined resource mapping mode to send single carrier frequency division multiplex signal in row control channel resource physically, described predetermined resource mapping mode does not comprise time domain code division multiplexing;

Base station, for utilizing the described single carrier frequency division multiplex signal receiving to send the phase difference estimation frequency deviation value between the symbol of same signal.

11. frequency deviation estimating systems according to claim 10, is characterized in that, described subscriber equipment, specifically comprises:

The first computing module, the first spread spectrum module, the first generation module and the first sending module;

Described the first computing module, when when described physical uplink control channel resource being PUCCH form 1/1a/1b resource, calculates the cyclically shifted sequences that corresponds respectively to data symbol and frequency pilot sign according to described PUCCH form 1/1a/1b resource index;

Described the first spread spectrum module, for according to described cyclically shifted sequences, described data symbol and frequency pilot sign being carried out to spread spectrum, obtains the signal after spread spectrum;

Described the first generation module, for generating single carrier frequency division multiplex signal according to the signal after described spread spectrum;

Described the first sending module, for utilizing described single carrier frequency division multiplex signal described PUCCH form 1/1a/1b resource to send to described base station.

12. frequency deviation estimating systems according to claim 11, is characterized in that, described base station, specifically comprises:

The first processing module, the first despreading module and the first estimation module;

Described the first processing module, for processing the described single carrier frequency division multiplex signal receiving to obtain receiving signal;

Described the first despreading module, for utilizing described cyclically shifted sequences to carry out despreading to described reception signal, obtains the signal after despreading;

Described the first estimation module, for utilizing the signal after described despreading to send the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol.

13. frequency deviation estimating systems according to claim 12, is characterized in that, described the first estimation module, specifically comprises:

Adjacent estimation unit;

Described adjacent estimation unit, for utilizing the adjacent pilot symbols of the signal after described despreading and/or the phase difference estimation frequency deviation estimated value between adjacent data symbol.

14. frequency deviation estimating systems according to claim 12, is characterized in that, described the first estimation module, specifically comprises:

The first rough estimate unit, the first Jing Gu unit and the first filter unit;

Described the first rough estimate unit, for utilizing adjacent pilot symbols and/or the first frequency deviation estimated value of the phase difference estimation between adjacent data symbol of the signal after described despreading;

Described the first Jing Gu unit, for when the conventional CP frame structure, utilizes being spaced apart 5 frequency pilot sign and/or being spaced apart phase difference estimation the second frequency deviation estimated value between 5 data symbol in the signal after described despreading; Or, when expansion CP frame structure, utilize phase difference estimation the second frequency deviation estimated value between 4 data symbol that is spaced apart in the signal after described despreading

Described the first filter unit, for estimating final frequency deviation estimated value according to described the first frequency deviation estimated value and the second frequency deviation estimated value.

15. frequency deviation estimating systems according to claim 10, is characterized in that, described subscriber equipment, specifically comprises:

The second computing module, the second spread spectrum module, discrete transform module, the second generation module and the second sending module;

Described the second computing module, when being PUCCH form 3 resource when described physical uplink control channel resource, calculates the cyclically shifted sequences corresponding to frequency pilot sign according to described PUCCH form 3 resource indexs;

Described the second spread spectrum module, for according to described cyclically shifted sequences, described frequency pilot sign being carried out to spread spectrum but not carrying out frequency division multiplexing, obtains the frequency pilot sign after spread spectrum;

Described discrete transform module is carried out discrete Fourier transform after data symbol and predetermined phase are multiplied each other, and obtains the data symbol after Fourier transform;

Described the second generation module, for generating single carrier frequency division multiplex signal according to the data symbol after the frequency pilot sign after described spread spectrum and described Fourier transform;

Described the second sending module, for utilizing described single carrier frequency division multiplex signal described PUCCH form 3 resources to send to described base station.

16. frequency deviation estimating systems according to claim 15, is characterized in that, described base station, specifically comprises:

The second processing module, pilot tone processing module, data processing module and the second estimation module;

Described the second processing module, for processing and obtain receiving signal the described single carrier frequency division multiplex signal receiving;

Described pilot tone processing module, for utilizing described cyclically shifted sequences to be correlated with to the pilot frequency locations of described reception signal, the described frequency pilot sign after being correlated with;

Described data processing module, for utilizing the conjugation of described predetermined phase to multiply each other to the Data Position of described reception signal, the described data symbol after being correlated with;

The second estimation module, sends the frequency pilot sign of same signal and/or the phase difference estimation frequency deviation estimated value between data symbol for utilizing.

17. frequency deviation estimating systems according to claim 16, is characterized in that, described the second estimation module, specifically comprises:

Interval estimation unit;

Described interval estimation unit, for when the conventional CP frame structure, utilizes and is spaced apart 4 frequency pilot sign and/or is spaced apart the phase difference estimation frequency deviation estimated value between 4 data symbol; Maybe, when expansion CP frame structure, utilize the phase difference estimation frequency deviation estimated value between the data symbol that is spaced apart 4.

18. frequency deviation estimating systems according to claim 16, is characterized in that, described the second estimation module, specifically comprises:

The second rough estimate unit, the second Jing Gu unit and the second filter unit;

Described the second rough estimate unit, for utilizing phase difference estimation the 3rd frequency deviation estimated value between the data symbol that is spaced apart 2;

Described the second Jing Gu unit, for when the conventional CP frame structure, utilizes and is spaced apart 4 frequency pilot sign and/or is spaced apart phase difference estimation the 4th frequency deviation estimated value between 4 data symbol; Or, when expansion CP frame structure, utilize phase difference estimation the 4th frequency deviation estimated value between the data symbol that is spaced apart 4;

Described the second filter unit, for estimating final frequency deviation estimated value according to described the 3rd frequency deviation estimated value and the 4th frequency deviation estimated value.

Images