CN102790740A - Method and device for acquiring signal power of physical uplink control channel - Google Patents

Abstract

The invention discloses a method and a device for acquiring the signal power of a physical uplink control channel. The method comprises the following steps of: after carrying out conjugate multiplication on each symbol in received signals on the physical uplink control channel and an orthogonal sequence of the symbol, carrying out compensation by a time bias compensation sequence to obtain a plurality of paths of compensated signals; after carrying out discrete Fourier transformation on each path of compensated signal, acquiring the signal power of each path of signal; and using the maximum signal power in all the acquired signal powers as the signal power of a user terminal and using a time bias compensation value corresponding to the maximum signal power as a time bias value of the user terminal. According to the invention, the signal power is calculated by utilizing a data part signal and a pilot frequency part signal of each user terminal for each path of signal and the accuracy of measuring the UE (User Equipment) signal power is improved, so that the correct detection probability of an eNodeB on uplink control information is improved and the eNodeB can make the correct response on the corresponding uplink control information.

Description

A kind of method and device that obtains the Physical Uplink Control Channel signal power

Technical field

The present invention relates to communication technique field, particularly relate to a kind of method and device that obtains the Physical Uplink Control Channel signal power.

Background technology

Long Term Evolution (LTE; Long Term Evolution) is the mainstream technology of the evolution of 3G (Third Generation) Moblie (3G) system to 4G evolution; It improves and has strengthened the aerial access technology of 3G system; Adopt OFDM (OFDM, Orthogonal Frequency Division Multiplexing) and multiple-input and multiple-output (MIMO, Multiple-Input Multiple-Out-put) sole criterion as its wireless network evolution.The peak rate of descending 100Mbit/s and up 50Mbit/s can be provided under the 20MHz spectral bandwidth, improve the performance of Cell Edge User, improve cell capacity and reduced system delay.

In the LTE system, user terminal (UE, User Equipment) adopts Physical Uplink Control Channel (PUCCH, Physical Uplink Control Channel) to send ascending control information to evolved base station (eNodeB, evolved Node B).PUCCH supports multiple form; Be used for UE like form 1 and send dispatch request to eNodeB; Form 1a is used for UE sends the automatic repeat requests (HARQ of mixing from 1 bit to eNodeB; Hybrid Automatic Repeat reQuest), correctly reply (ACK, Acknowledge) or wrong responses (NACK, Non-Acknowledge) information; Form 1b is used for UE sends HARQ ACK from 2 bits to eNodeB or NACK.For form 2,2a, 2b, be that UE is to the indication of eNodeB transmitting channel quality (CQI, Channel Quality Indicator) and HARQ, ACK or nack message.

LTE allows in a sub-frame, to adopt a plurality of time (Resource Block; RB), distribute the PUCCH channels to come transferring ACK/NACK, CQI or SR (Scheduling Request, dispatch request) message to a plurality of UE in the sub-district; One of them PUCCH channel uses a RB resource in the sub-frame; Corresponding 2 time slots of RB, each time slot have 7 symbols (corresponding common prefix) or 6 symbols (corresponding expansion prefix), and each symbol has 12 number of sub-carrier.For PUCCH form 1,1a and the 1b under the common prefix and since can adopt 12 cyclic shift value and 3 orthogonal sequences altogether 36 code channels distinguish different users, therefore on 1 RB, can support maximum 36 users' transmission of messages.Therefore, eNodeB need detect PUCCH form 1,1a and 1b, judges whether UE has sent corresponding ascending control information, to handle accordingly.

Prior art is to utilize the ratio (being signal to noise ratio or Signal to Interference plus Noise Ratio) based on estimated signals power and noise-plus-interference power to compare with preset thresholding.If do not surpass thresholding, think that then UE does not send ascending control information, belong to discontinuous transmission (DTX, Discontinuous Transmission); Otherwise, think that then UE has sent ascending control information, if form 1 just thinks that UE has sent dispatch request, if form 1a and 1b also need proceed ACK, NACK detection.It is thus clear that the accuracy that signal power and noise-plus-interference power are estimated is very important.

In the prior art; Application number is the computational methods that 200910090136.5 Chinese patent provides the signal power of a kind of PUCCH form 1,1a and 1b; The orthogonal sequence that promptly utilizes the data division that UE signaled, permanent envelope zero autocorrelation sequence of distributing to UE and distribute to UE on channel resource calculates signal power; There is following problem in this method: the data portion of 1) only having utilized UE the to send signal power estimator signal of assigning to; And the pilot portion that does not utilize this UE to send signal comes power estimator signal, and this causes the fluctuation of signal power estimated value bigger; 2) when UE exists when inclined to one side; Particularly a plurality of UE in 36 code channels exist when different when inclined to one side; Be difficult to accurately estimate the signal power of each UE, can cause that estimated signals power is less than normal, increased the probability of dispatch request, ACK or NACK being judged into by accident DTX; Influence eNodeB corresponding ascending control information has been made correct response, and then reduced systematic function.

In addition, accurately estimate the signal power of PUCCH form 1,1a and 1b, its power control of carrying out correct and effective is also seemed extremely important.

Summary of the invention

The technical problem that the present invention will solve provides a kind of method and device that obtains the Physical Uplink Control Channel signal power, in order to solve the problem that the fluctuation of signal power estimated value causes systematic function to reduce more greatly in the prior art.

For solving the problems of the technologies described above, on the one hand, the present invention provides a kind of method of obtaining the Physical Uplink Control Channel signal power, and said method comprises:

After each symbol and its orthogonal sequence conjugate multiplication of receiving on the Physical Uplink Control Channel in the signal, compensate the multiple signals after obtaining to compensate through the partial compensation for the time sequence;

After every road signal after the compensation carried out discrete Fourier transform, obtain the signal power of said every road signal;

With the signal power of the maximum signal power in all signal powers of obtaining as user terminal, the partial compensation for the time value that said maximum signal power is corresponding as said user terminal the time be worth partially.

Further, said partial compensation for the time sequence does

Wherein,

V=P ε;

TA _uThe partial compensation for the time value of representing the u road, u=0,1 ..., U-1, U are the fixing sum of partial compensation for the time; TA _TargetTime inclined to one side desired value for the adjustment of uplink synchronous mechanism; δ is the deviation of uplink synchronous mechanism adjustment; The computing of round () expression round; P is an inclined to one side parameter when compensating fixedly, P>=10.

Further,, obtain the signal power of this road signal, specifically comprise for every road signal:

On the channel resource of each time slot of distributing to said user terminal, extract data-signal, then according to the data-signal orthogonal sequence of distributing to the corresponding time slot of said user terminal, calculated data signal power;

On the channel resource of each time slot of distributing to said user terminal, extract pilot signal,, calculate pilot signal power then according to the pilot signal orthogonal sequence of distributing to the corresponding time slot of said user terminal;

Said data-signal power and pilot signal power in the signal of every road are averaged, obtain the signal power of the every road of said user terminal signal.

Further, on the channel resource of each time slot of distributing to said user terminal, extract data-signal, according to the data-signal orthogonal sequence of distributing to the corresponding time slot of said user terminal, calculate said data-signal power then, be specially:

At first, on the channel resource of each time slot of distributing to said user terminal, extract data-signal; Then, with said data-signal and the data-signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of said user terminal and summation; At last, summed result divided by calculating mould square after the data-signal orthogonal sequence length, is obtained the data-signal power of said each time slot of user terminal.

Further, on the channel resource of each time slot of distributing to said user terminal, extract pilot signal,, calculate pilot signal power, be specially then according to the pilot signal orthogonal sequence of distributing to the corresponding time slot of said user terminal:

At first, on the channel resource of each time slot of distributing to said user terminal, extract pilot signal; Then, with said pilot signal and the pilot signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of said user terminal and summation; At last, summed result divided by calculating mould square after the pilot signal orthogonal sequence length, is obtained the pilot signal power of said each time slot of user terminal.

On the other hand, the present invention also provides a kind of device that obtains the Physical Uplink Control Channel signal power, and said device comprises:

Compensating unit is used for compensating the multiple signals after obtaining to compensate after each symbol and its orthogonal sequence conjugate multiplication with reception signal on the Physical Uplink Control Channel through the partial compensation for the time sequence;

The signal power acquiring unit after being used for the every road signal after the compensation carried out discrete Fourier transform, obtains the signal power of said every road signal;

Processing unit is used for the maximum signal power of all signal powers of the obtaining signal power as user terminal, the partial compensation for the time value that said maximum signal power is corresponding as said user terminal the time be worth partially.

Further, said partial compensation for the time sequence does

Wherein, V=P ε;

TA _uThe partial compensation for the time value of representing the u road, u=0,1 ..., U-1, U are the fixing sum of partial compensation for the time; TA _TargetTime inclined to one side desired value for the adjustment of uplink synchronous mechanism; δ is the deviation of uplink synchronous mechanism adjustment; The computing of round () expression round; P is an inclined to one side parameter when compensating fixedly, P>=10.

Further, said signal power acquiring unit further comprises:

Data-signal power obtains subelement, is used on the channel resource of each time slot of distributing to said user terminal, extracting data-signal, then according to the data-signal orthogonal sequence of distributing to the corresponding time slot of said user terminal, calculated data signal power;

Pilot signal power is obtained subelement, is used on the channel resource of each time slot of distributing to said user terminal, extracting pilot signal, then according to the pilot signal orthogonal sequence of distributing to the corresponding time slot of said user terminal, calculates pilot signal power;

The signal power subelement is used for the said data-signal power and the pilot signal power of every road signal are averaged, and obtains the signal power of the every road of said user terminal signal.

Further, said data-signal power obtains subelement and further comprises:

The data signal extraction module is used on the channel resource of each time slot of distributing to said user terminal, extracting data-signal;

The data-signal summation module is with said data-signal and the data-signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of said user terminal and summation;

The data-signal processing module is used for summed result obtaining the data-signal power of said each time slot of user terminal divided by calculating its mould square after the data-signal orthogonal sequence length.

Further, said pilot signal power is obtained subelement and is further comprised:

The pilot signal extraction module is used on the channel resource of each time slot of distributing to said user terminal, extracting pilot signal;

The pilot signal summation module is used for said pilot signal and the pilot signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of said user terminal and summation;

The pilot signal processing module is used for summed result obtaining the pilot signal power of said each time slot of user terminal divided by calculating mould square after the pilot signal orthogonal sequence length

Beneficial effect of the present invention is following:

The present invention's inclined to one side compensation deals when introducing the multichannel different fixing; Utilize the data division signal of each user terminal and pilot portion signal to come common signal calculated power to every road signal; Solved that prior art exists since during only with data division signal power estimator signal and owing to UE inclined to one side existence influenced the accurate estimation of signal power; Improved the accuracy of measuring the UE signal power; And then improved the correct detection probability of eNodeB to ascending control information, and make eNodeB can make correct response to corresponding ascending control information, also make the power control of PUCCH form 1,1a and 1b can reach re-set target simultaneously.

Description of drawings

Fig. 1 is a kind of flow chart that obtains the method for Physical Uplink Control Channel signal power in the embodiment of the invention;

Fig. 2 is a kind of structural representation that obtains the device of Physical Uplink Control Channel signal power in the embodiment of the invention;

Fig. 3 is the another kind of structural representation that obtains the device of Physical Uplink Control Channel signal power in the embodiment of the invention.

Embodiment

In order to solve the problem that the fluctuation of prior art signal power estimated value is big, reduced systematic function; The invention provides a kind of method and device that obtains the Physical Uplink Control Channel signal power; Below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, does not limit the present invention.

The embodiment of the invention is an example with the LTE system.The running time-frequency resource of a PUCCH channel is a RB, comprises two time slots.For common prefix situation, a RB comprises 14 symbols of time domain, each symbol 12 number of sub-carrier; For the expansion prefix, a RB comprises 12 symbols of time domain, each symbol 12 number of sub-carrier.Method of the present invention is applicable to PUCCH form 1,1a and 1b situation.Under common prefix situation, for PUCCH form 1,1a and 1b since can adopt 12 cyclic shift value and 3 orthogonal sequences altogether 36 code channels distinguish different users, therefore on 1 RB, can support maximum 36 users' transmission of messages.Under expansion prefix situation and since can adopt 12 cyclic shift value and 2 orthogonal sequences altogether 24 code channels distinguish different users, therefore on 1 RB, can support maximum 24 users' transmission of messages.Wherein, cyclic shift N _CsGet the integer between 0～11,12 values are arranged.For choosing of orthogonal sequence, condition of different has different orthogonal sequences.Specifically, following several kinds of situation are arranged:

Under common prefix situation, a time slot has four data symbols and three frequency pilot signs, and orthogonal sequence is three orthogonal sequence (Wd of data division ₀=[1,1,1,1], Wd ₁=[1 ,-1,1 ,-1], Wd ₂=[1 ,-1 ,-1,1]) and three orthogonal sequence (Wr of pilot portion ₀=[1,1,1], Wr ₁=[1, e ^{J2 π/3}, e ^{J4 π/3}], Wr ₂=[1, e ^{J4 π/3}, e ^{J2 π/3}]).ENodeB distributes different N to different UEs _CsOr different orthogonal sequences, a PUCCH channel is supported 36 UE altogether.

For the special format under the common prefix situation: PUCCH form 1,1a and the 1b of brachymemma, first time slot have four data symbols and three frequency pilot signs, and three orthogonal sequences of corresponding data part are Wd ₀=[1,1,1,1], Wd ₁=[1 ,-1,1 ,-1], Wd ₂=[1 ,-1 ,-1,1], three orthogonal sequences of pilot portion are Wr ₀=[1,1,1], Wr ₁=[1, e ^{J2 π/3}, e ^{J4 π/3}], Wr ₂=[1, e ^{J4 π/3}, e ^{J2 π/3}]; Second time slot has three data symbols and three frequency pilot signs, and three orthogonal sequences of corresponding data part and three orthogonal sequences of pilot portion are the same, are Wr ₀=[1,1,1], Wr ₁=[1, e ^{J2 π/3}, e ^{J4 π/3}], Wr ₂=[1, e ^{J4 π/3}, e ^{J2 π/3}].ENodeB distributes different N to different UEs _CsOr different orthogonal sequences, a PUCCH channel is supported 36 UE altogether.

Under expansion prefix situation, a time slot has four data symbols and two frequency pilot signs, and orthogonal sequence is divided into three orthogonal sequence (Wd of data division ₀=[1,1,1,1], Wd ₁=[1 ,-1,1 ,-1], Wd ₂=[1 ,-1 ,-1,1]) and two orthogonal sequence (Wr of pilot portion ₀=[1,1], Wr ₁=[1 ,-1]).ENodeB distributes different N to different UEs _CsOr different orthogonal sequences, a PUCCH channel is supported 24 UE altogether.

Below in conjunction with accompanying drawing the enforcement of technical scheme is done further to describe in detail.

As shown in Figure 1, the embodiment of the invention relates to a kind of method of obtaining the Physical Uplink Control Channel signal power, may further comprise the steps:

Step S101 after each symbol and its orthogonal sequence conjugate multiplication of receiving on the Physical Uplink Control Channel in the signal, compensates through the partial compensation for the time sequence, the multiple signals after obtaining to compensate.

In this step, suppose that the reception signal of eNodeB on a PUCCH channel is Y _{Ns, m, k}, its subscript index ns representes the time slot sequence number, value is 0 and 1; K representes sub-carrier indices, and span is 0～11 integer; M representes notation index, and for different prefix situation, the span of its data symbol and data symbol is different, and wherein the data symbol number is designated as Nd _Ns, the frequency pilot sign number is designated as Nr _Ns, concrete value is as mentioned below.

For PUCCH 1,1a, the 1b form of common prefix, the notation index m of each time slot ns is the integer between 0～6, and wherein, notation index m is that 2～4 3 corresponding symbols are frequency pilot signs, and 4 symbols that all the other notation index m are corresponding are data symbols.

For PUCCH 1,1a, the 1b form of brachymemma under the common prefix, the notation index m of time slot 0 is the integer between 0～6, and wherein, notation index m is that 2～4 3 corresponding symbols are frequency pilot signs, and 4 symbols that all the other notation index m are corresponding are data symbols; The notation index m of time slot 1 is the integer between 0～5, and wherein, notation index m is that 2～4 3 corresponding symbols are frequency pilot signs, and 3 symbols that all the other notation index m are corresponding are data symbols.

For PUCCH 1,1a, the 1b form of expansion prefix, the notation index m of each time slot ns is the integer between 0～5, and wherein, notation index m is that 2 and 32 corresponding symbols are frequency pilot signs, and 4 symbols that all the other notation index m are corresponding are data symbols.

Under concrete PUCCH 1,1a, 1b form, corresponding j0 the orthogonal sequence Wd of each time slot data division _{Ns, j0}(j0 ∈ 0,1 ..., Nd _Ns-1}) be the described orthogonal sequence Wd of preamble ₀, Wd ₁, Wd ₂One of; Corresponding j1 the orthogonal sequence Wr of pilot portion _Ns.j1Be the described orthogonal sequence Wr of preamble ₀, Wr ₁, Wr ₂One of, perhaps be the described orthogonal sequence Wr of preamble ₀, Wr ₁One of.

With Y _{Ns, m, k}With the result after orthogonal sequence (reference signal sequence) conjugate multiplication of each symbol be H _{Ns, m, k}(wherein, k=0,1 ..., 11).Supposing compensation deals inclined to one side when always having U road signal carries out different fixing, is TA partially when compensating for correspondence _uU (u=0,1 ..., U-1) the road signal compensates processing, the partial compensation for the time sequence does

The partial compensation for the time method receives signal for the preceding PUCCH of compensation each symbol carries out dot product, the signal after being compensated with the compensation sequence.When input is designated as H _{Ns, m, k}, output is designated as

The time, have following relation to set up:

Wherein, the partial compensation for the time value TA on u road _uChoose in the partial compensation for the time scope of confirming according to LTE uplink synchronous mechanism,

(imaginary unit).According to the time inclined to one side scope that uplink synchronous mechanism is confirmed, selects suitable multi-channel compensating system processing and every road fixedly the time be worth partially, thereby inclined to one side compensation deals when carrying out different fixing.U road compensation fixedly the time be partially:

${\mathrm{TA}}_u={\mathrm{TA}}_{t\arg \mathrm{et}}-\frac{V}{2}+\mathrm{round}(u\·\frac{V}{U-1}),$

Wherein, TA _Target(unit is a basic time unit) is the time inclined to one side desired value of uplink synchronous mechanism adjustment, and δ (δ is greater than 0, and unit is a basic time unit) is the deviation of uplink synchronous mechanism adjustment, so uplink synchronous mechanism confirms that time inclined to one side TA its scope of UE is: TA _Target-δ≤TA≤TA _Target+ δ.V=P ε;

P is an inclined to one side parameter when compensating fixedly; Inclined to one side scope when the value of P has determined compensation fixedly, generally P>=10.The computing of round () expression round.

For example, work as TA _Target=32, δ=7, U=4, P=10 then has ε=2, V=10 ε=20, the compensation of every road fixedly the time be partially: TA ₀=22, TA ₁=29, TA ₂=35, TA ₃=42.Wherein, inclined to one side unit is a basic time unit time.

Step S102, the said every road signal after the compensation carried out discrete Fourier transform after, obtain the signal power of said every road signal.

In this step;

carries out (DFT of leaf transformation in 12 point discrete Fouriers according to each symbol of each time slot to the value of 12 number of sub-carrier to u road signal; Discrete Fourier transform); The gained result is designated as

DFT computing and has improved operation efficiency, when particularly the multi-user being transmitted PUCCH form 1,1a or 1b information simultaneously in a RB.

After carrying out discrete Fourier transform, calculate the signal power of every road signal, for u road signal, according to the cyclic shift value index of each symbol of data division and the cyclic shift value index of pilot portion, from

Extract in the signal can obtain with time slot ns in each cyclic shift value N _CsCorresponding data division receives signal

For (i=0,1 ..., Nd _Ns-1) and pilot portion receive signal

((i=0,1 ..., Nr _Ns-1).The cyclic shift value of supposing to distribute to UE is N _Cs0, N _Cs0∈ 0,1 ..., 11}, time slot ns have distributed j0 the orthogonal sequence Wd that orthogonal sequence is a data division _{Ns, j0}(j0 ∈ 0,1 ..., Nd _Ns-1}), time slot ns has distributed j1 the orthogonal sequence Wr that orthogonal sequence is a pilot portion _Ns.j1(j1 ∈ 0,1 ..., Nr _Ns-1}), corresponding code channel is designated as N ₀

The signal power computational methods of every road signal are specific as follows:

Step 1021: for every road signal, on the channel resource of each time slot of distributing to UE, extract data-signal, combine to distribute to the data-signal orthogonal sequence calculated data signal power of the corresponding time slot of this UE then.

The method of calculated data signal power is specially: for every road signal; On the channel resource of each time slot of distributing to UE, extract data-signal; Then with the data-signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of this UE and summation; Then with summed result divided by data-signal orthogonal sequence length, calculate mould square at last, obtain the data-signal power of this each time slot of UE.

For u road signal, corresponding to the cyclic shift value N of data division on each symbol of this each time slot of UE _Cs0, from the gained signal

The middle signal that obtains this UE that extracts

Then with j0 orthogonal sequence Wd of the data division of distributing to this UE _{Ns, j0}(j0 ∈ 0,1 ..., Nd _Ns-1}) conjugate multiplication and summation, then with summed result divided by data-signal orthogonal sequence length, calculate its mould square at last, obtain the data-signal power of this UE u road each time slot of signal

Concrete formula is following:

${\mathrm{Pd}}_{N_{0,\mathrm{ns}}}^{\left(u\right)}={|\frac{1}{{\mathrm{Nd}}_{\mathrm{ns}}}\·\underset{i=0}{\overset{{\mathrm{Nd}}_{\mathrm{ns}}-1}{\mathrm{\Σ}}}({\mathrm{Sd}}_{N_{\mathrm{cso},\mathrm{ns},i}}^{\left(u\right)}\·\mathrm{conj}\left({\mathrm{Wd}}_{\mathrm{ns},j0,i}\right))|}^2;$

Wherein, Wd _{Ns, j0, i}Represent ns time slot, a j0 orthogonal sequence Wd _{Ns, j0}In i element, and i=0,1 ..., Nd _Ns-1; Conj () representes conjugate operation, || ²The expression computing module-square.

Step 1022: for every road signal, on the channel resource of each time slot of distributing to UE, extract pilot signal, the pilot signal orthogonal sequence that combines then to distribute to the corresponding time slot of this UE calculates pilot signal power.

The method of calculating pilot signal power is specially: for every road signal; On the channel resource of each time slot of distributing to UE, extract pilot signal; Then with the pilot signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of this UE and summation; Then with summed result divided by pilot signal orthogonal sequence length, calculate mould square at last, obtain the pilot signal power of this each time slot of UE.

For u road signal, corresponding to the cyclic shift value N of pilot signal part on each symbol of this each time slot of UE _Cs0, from the gained signal

The middle signal that obtains this UE that extracts

Then with j1 the orthogonal sequence Wr of pilot signal part that distributes to UE _Ns.j1Conjugate multiplication and summation, then with summed result divided by pilot signal orthogonal sequence length, calculate mould square at last, obtain the signal power of this each time-multiplexed pilot signal section of UE u road

Concrete formula is following:

${\mathrm{Pr}}_{N_{0,\mathrm{ns}}}^{\left(u\right)}={|\frac{1}{{\mathrm{Nr}}_{\mathrm{ns}}}\·\underset{i=0}{\overset{{\mathrm{Nr}}_{\mathrm{ns}}-1}{\mathrm{\Σ}}}({\mathrm{Sr}}_{N_{\mathrm{cso},\mathrm{ns},i}}^{\left(u\right)}\·\mathrm{conj}\left({\mathrm{Wr}}_{\mathrm{ns},j1,i}\right))|}^2$

Wherein, Wr _{Ns, j1, i}Represent ns time slot, a j1 orthogonal sequence Wr _Ns.j1In i element, and i=0,1 ..., Nr _Ns-1; Conj () representes conjugate operation, || ²The expression computing module-square.

Step 1023: data-signal power and pilot signal power in the signal of every road are averaged, obtain the signal power of the every road of this UE signal.

Particularly; According to following formula; The data division signal power and the pilot signal part signal power of two time slots in this UE u road signal are averaged, and the concrete formula of signal power estimation

that obtains this UE u road is following:

$P_{N_0,s}^{\left(u\right)}=\frac{1}{4}\underset{\mathrm{ns}=0}{\overset{1}{\mathrm{\Σ}}}({\mathrm{Pd}}_{N_0,\mathrm{ns}}^{\left(u\right)}+{\mathrm{Pr}}_{N_0,\mathrm{ns}}^{\left(u\right)}).$

Step S103, with the signal power of the maximum signal power in all signal powers of obtaining as user terminal, the partial compensation for the time value that maximum signal power is corresponding as this user terminal the time be worth partially.

In this step; In the signal power of the multiple signals that in above-mentioned steps, calculate; Select the final signal performance number of the corresponding signal power of a road maximum signal of signal power as this UE, the corresponding partial compensation for the time value of maximum signal power as this user terminal the time be worth partially.

Repeat above-mentioned steps, then can obtain the signal power value of each UE.

In addition, as shown in Figure 2, the embodiment of the invention also relates to a kind of device that obtains the Physical Uplink Control Channel signal power of realizing said method, and this device comprises:

Compensating unit 201 is used for compensating the multiple signals after obtaining to compensate after each symbol and its orthogonal sequence conjugate multiplication with reception signal on the Physical Uplink Control Channel through the partial compensation for the time sequence;

Signal power acquiring unit 202 after being used for the every road signal after the compensation carried out discrete Fourier transform, obtains the signal power of every road signal;

Processing unit 203 is used for the maximum signal power of all signal powers of the obtaining signal power as user terminal, the partial compensation for the time value that maximum signal power is corresponding as user terminal the time be worth partially.

For reaching implementation result more, the embodiment of the invention also relates to a kind of device that obtains the Physical Uplink Control Channel signal power of realizing said method, and as shown in Figure 3, this device comprises:

Compensating unit 301 is used for compensating the multiple signals after obtaining to compensate after each symbol and its orthogonal sequence conjugate multiplication with reception signal on the Physical Uplink Control Channel through the partial compensation for the time sequence;

Signal power acquiring unit 302 after being used for the every road signal after the compensation carried out discrete Fourier transform, obtains the signal power of every road signal;

Processing unit 303 is used for the maximum signal power of all signal powers of the obtaining signal power as user terminal, the partial compensation for the time value that maximum signal power is corresponding as user terminal the time be worth partially.

Wherein, signal power acquiring unit 302 further comprises:

Data-signal power obtains subelement 3021, is used on the channel resource of each time slot of distributing to user terminal, extracting data-signal, then according to the data-signal orthogonal sequence of distributing to the corresponding time slot of user terminal, calculated data signal power;

Pilot signal power is obtained subelement 3022, is used on the channel resource of each time slot of distributing to user terminal, extracting pilot signal, then according to the pilot signal orthogonal sequence of distributing to the corresponding time slot of user terminal, calculates pilot signal power;

Signal power subelement 3023 is used for the data-signal power and the pilot signal power of every road signal are averaged, and obtains the signal power of the every road of user terminal signal.

Data-signal power obtains subelement 3021 and further comprises:

Data signal extraction module 30211 is used on the channel resource of each time slot of distributing to user terminal, extracting data-signal;

Data-signal summation module 30212 is with above-mentioned data-signal and the data-signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of user terminal and summation;

Data-signal processing module 30213 is used for summed result obtaining the data-signal power of each time slot of user terminal divided by calculating mould square after the data-signal orthogonal sequence length.

Pilot signal power is obtained subelement 3022 and is further comprised:

Pilot signal extraction module 30221 is used on the channel resource of each time slot of distributing to user terminal, extracting pilot signal;

Pilot signal summation module 30222 is used for above-mentioned pilot signal and the pilot signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of user terminal and summation;

Pilot signal processing module 30223 is used for summed result obtaining the pilot signal power of each time slot of user terminal divided by calculating mould square after the pilot signal orthogonal sequence length.

Can find out by the foregoing description; The present invention is according to the channel characteristic of LTE PUCCH; On PUCCH form 1,1a and 1b channel; Through introducing the DFT computing, improved operation efficiency when making the signal power of calculating a plurality of users on this PUCCH channel, inclined to one side compensation deals when introducing the multichannel different fixing; Utilize the data division signal of each UE and pilot portion signal to come common signal calculated power to every road signal; Solved that prior art exists since only with data division signal power estimator signal and since during UE inclined to one side existence influenced the accurate estimation of signal power, improved the accuracy of measurement UE signal power, and then improved the correct detection probability of eNodeB ascending control information; Make eNodeB can make correct response, also make the power control of PUCCH form 1,1a and 1b can reach re-set target simultaneously corresponding ascending control information.

Although be the example purpose, the preferred embodiments of the present invention are disclosed, it also is possible those skilled in the art will recognize various improvement, increase and replacement, therefore, scope of the present invention should be not limited to the foregoing description.

Claims (10)

1. a method of obtaining the Physical Uplink Control Channel signal power is characterized in that, said method comprises:

After each symbol and its orthogonal sequence conjugate multiplication of receiving on the Physical Uplink Control Channel in the signal, compensate the multiple signals after obtaining to compensate through the partial compensation for the time sequence;

After every road signal after the compensation carried out discrete Fourier transform, obtain the signal power of said every road signal;

With the signal power of the maximum signal power in all signal powers of obtaining as user terminal, the partial compensation for the time value that said maximum signal power is corresponding as said user terminal the time be worth partially.

2. the method for obtaining the Physical Uplink Control Channel signal power as claimed in claim 1 is characterized in that, said partial compensation for the time sequence does

Wherein,

V=P ε;

TA _uThe partial compensation for the time value of representing the u road, u=0,1 ..., U-1, U are the fixing sum of partial compensation for the time; TA _TargetTime inclined to one side desired value for the adjustment of uplink synchronous mechanism; δ is the deviation of uplink synchronous mechanism adjustment; The computing of round () expression round; P is an inclined to one side parameter when compensating fixedly, P>=10.

3. according to claim 1 or claim 2 the method for obtaining the Physical Uplink Control Channel signal power is characterized in that, for every road signal, obtains the signal power of this road signal, specifically comprises:

On the channel resource of each time slot of distributing to said user terminal, extract data-signal, then according to the data-signal orthogonal sequence of distributing to the corresponding time slot of said user terminal, calculated data signal power;

On the channel resource of each time slot of distributing to said user terminal, extract pilot signal,, calculate pilot signal power then according to the pilot signal orthogonal sequence of distributing to the corresponding time slot of said user terminal;

Said data-signal power and pilot signal power in the signal of every road are averaged, obtain the signal power of the every road of said user terminal signal.

4. the method for obtaining the Physical Uplink Control Channel signal power as claimed in claim 3; It is characterized in that; On the channel resource of each time slot of distributing to said user terminal, extract data-signal; According to the data-signal orthogonal sequence of distributing to the corresponding time slot of said user terminal, calculate said data-signal power then, be specially:

At first, on the channel resource of each time slot of distributing to said user terminal, extract data-signal; Then, with said data-signal and the data-signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of said user terminal and summation; At last, summed result divided by calculating mould square after the data-signal orthogonal sequence length, is obtained the data-signal power of said each time slot of user terminal.

5. the method for obtaining the Physical Uplink Control Channel signal power as claimed in claim 3; It is characterized in that; On the channel resource of each time slot of distributing to said user terminal, extract pilot signal; According to the pilot signal orthogonal sequence of distributing to the corresponding time slot of said user terminal, calculate pilot signal power then, be specially:

At first, on the channel resource of each time slot of distributing to said user terminal, extract pilot signal; Then, with said pilot signal and the pilot signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of said user terminal and summation; At last, summed result divided by calculating mould square after the pilot signal orthogonal sequence length, is obtained the pilot signal power of said each time slot of user terminal.

6. a device that obtains the Physical Uplink Control Channel signal power is characterized in that, said device comprises:

Compensating unit is used for compensating the multiple signals after obtaining to compensate after each symbol and its orthogonal sequence conjugate multiplication with reception signal on the Physical Uplink Control Channel through the partial compensation for the time sequence;

The signal power acquiring unit after being used for the every road signal after the compensation carried out discrete Fourier transform, obtains the signal power of said every road signal;

Processing unit is used for the maximum signal power of all signal powers of the obtaining signal power as user terminal, the partial compensation for the time value that said maximum signal power is corresponding as said user terminal the time be worth partially.

7. the device that obtains the Physical Uplink Control Channel signal power as claimed in claim 6 is characterized in that, said partial compensation for the time sequence does

Wherein,

V=P ε; TA _uThe partial compensation for the time value of representing the u road, u=0,1 ..., U-1, U are the fixing sum of partial compensation for the time; TA _TargetTime inclined to one side desired value for the adjustment of uplink synchronous mechanism; δ is the deviation of uplink synchronous mechanism adjustment; The computing of round () expression round; P is an inclined to one side parameter when compensating fixedly, P>=10.

8. like claim 6 or the 7 described devices that obtain the Physical Uplink Control Channel signal power, it is characterized in that said signal power acquiring unit further comprises:

Data-signal power obtains subelement, is used on the channel resource of each time slot of distributing to said user terminal, extracting data-signal, then according to the data-signal orthogonal sequence of distributing to the corresponding time slot of said user terminal, calculated data signal power;

Pilot signal power is obtained subelement, is used on the channel resource of each time slot of distributing to said user terminal, extracting pilot signal, then according to the pilot signal orthogonal sequence of distributing to the corresponding time slot of said user terminal, calculates pilot signal power;

The signal power subelement is used for the said data-signal power and the pilot signal power of every road signal are averaged, and obtains the signal power of the every road of said user terminal signal.

9. the device that obtains the Physical Uplink Control Channel signal power as claimed in claim 8 is characterized in that, said data-signal power obtains subelement and further comprises:

The data signal extraction module is used on the channel resource of each time slot of distributing to said user terminal, extracting data-signal;

The data-signal summation module is with said data-signal and the data-signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of said user terminal and summation;

The data-signal processing module is used for summed result obtaining the data-signal power of said each time slot of user terminal divided by calculating mould square after the data-signal orthogonal sequence length.

10. the device that obtains the Physical Uplink Control Channel signal power as claimed in claim 8 is characterized in that, said pilot signal power is obtained subelement and further comprised:

The pilot signal extraction module is used on the channel resource of each time slot of distributing to said user terminal, extracting pilot signal;

The pilot signal summation module is used for said pilot signal and the pilot signal orthogonal sequence conjugate multiplication of distributing to the corresponding time slot of said user terminal and summation;

The pilot signal processing module is used for summed result obtaining the pilot signal power of said each time slot of user terminal divided by calculating mould square after the pilot signal orthogonal sequence length.

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