CN103746946B - Method for estimating Ior/Ec in multiple input multiple output communication (MIMO) system and terminal device - Google Patents
Method for estimating Ior/Ec in multiple input multiple output communication (MIMO) system and terminal device Download PDFInfo
- Publication number
- CN103746946B CN103746946B CN201310739728.1A CN201310739728A CN103746946B CN 103746946 B CN103746946 B CN 103746946B CN 201310739728 A CN201310739728 A CN 201310739728A CN 103746946 B CN103746946 B CN 103746946B
- Authority
- CN
- China
- Prior art keywords
- signal
- noise
- antenna
- channel
- pilot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention discloses a method for estimating Ior/Ec in multiple input multiple output communication (MIMO) system and terminal device. The invention relates to the technical field of communication, if an extra information interaction between a cell and a terminal device is not increased, a more accurate estimation Ior/Ec can be obtain. The method comprises the following steps: for a first pilot signal and a second pilot signal to be despread and descrambled, respectively obtaining a channel response and a symbol level noise of at least two antennas; respectively obtaining a first covariance of noise item of the first pilot signal, a second covariance of noise item of the second pilot signal and a cross covariance between the noise items of the first pilot signal and the second pilot signal; according to the channel response of at least two antennaes, the noise covariance, the first covariance, the second covariance and the cross covariance of the symbol level noise of at least two antennaes, calculating the ratio of energy and pilot frequency energy of signal of at least two antennas. The terminal device is mainly used for equalization in the MIMO system.
Description
Technical field
The present invention relates to estimating in communication technical field, more particularly, to mimo system that signal energy compares Ior/ with pilot energy
Ec method and terminal device.
Background technology
In LTE (Long Term Evolution, Long Term Evolution) system, it is possible to use MIMO (Multiple Input
Multiple Output, multiple-input, multiple-output) the technology communication of realizing between base station and terminal, being mainly characterized by of mimo system：Point
Multiple antennas are not arranged on cell and terminal device, based on this feature, mimo system can be consisted of multiple antennas
Multiple channels realize the data transfer between base station and terminal, have the very high availability of frequency spectrum.
When base station is communicated with terminal, for compensation system characteristic, reduce intersymbol interference, terminal is according to base station every sky
Ior/Ec (total transmission power/pilot power) the estimation balancing coefficient of line, and equalized according to equalizing coefficient.
At present, during terminal estimation balancing coefficient, using default Ior/Ec.
But, in mimo systems, base station is provided with two or more antennas, and generally each antenna all can send and lead
Frequently, but the pilot energy on each transmitting antenna might not be identical；And the other signals beyond pilot tone, such as various signaling letters
Road, generally only sends on main antenna, causes the signal that each antenna sends different；And, same letter launched by each antenna
Number when, signal energy is typically also different, so so that on base station the Ior/Ec of each antenna differ so that using one in advance
If Ior/Ec estimation balancing coefficient accuracy relatively low, make terminal equalization performance poor.
, at this taking the PSP (Primary and Secondary Pilot, major-minor pilot frequency mode) in mimo system as a example
Under pattern, main antenna sends dominant pilot, PDSCH and other common signal channels, and auxiliary antenna only sends guidance frequency and PDSCH channel, and
Main antenna carries out channel with generally configuring different pilot powers, terminal on auxiliary antenna according to the pilot tone on primary/secondary transmission antenna
During estimation, this result contains respective pilot energy sqrt (Ec).Therefore, channel estimation results finally need in equilibrium to convert
Equalizer coefficients could be constructed on Traffic Channel.If terminal cannot accurately obtain the Ior/Ec of main antenna and auxiliary antenna, eventually
End is difficult to estimation balancing device coefficient.
Equally, in the case of multiple cell, the pilot power of main plot and the pilot power of its neighbor cell also can not phases
Same, there is also terminal and be difficult to estimation balancing device coefficient.
In order to solve the above problems, each antenna Ior/Ec can be sent to terminal, terminal root by base station at set intervals
According to the Ior/Ec estimation balancing coefficient receiving.Adopt in this way estimate Ior/Ec during, inventor find at least
There are the following problems：Reflect current Ior/Ec in order to timely, base station needs frequently to send excessive data to terminal, significantly
Increased signal spending, waste Radio Resource.
Content of the invention
Embodiments of the invention are provided in a kind of mimo system estimates Ior/Ec method and terminal device, is not increasing cell
On the premise of extra information exchange and terminal device between, can obtain more accurately estimating signal energy and pilot energy
Than.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
In a first aspect, the invention provides a kind of estimate signal energy and pilot energy ratio method, for one kind wirelessly eventually
End, described wireless terminal for receiving transmission equipment, by least two antennas, lead respectively by the first pilot signal sending and second
Frequency signal, methods described includes：
Descrambling and de-spreading is carried out to described first pilot signal and described second pilot signal, respectively at least two described in acquisition
The channel response of antenna and symbol level noise；
Ask for the first covariance of the noise item of described first pilot signal and the noise of described second pilot signal respectively
The second covariance, and mutual between the noise item of described first pilot signal and the noise item of described second pilot signal
Covariance；
According to the channel response of described at least two antennas, the described symbol level noise of described at least two antennas is respective
Noise variance, described first covariance, described second covariance and described cross covariance, at least two antennas described in calculating
The respective energy of signal and pilot energy ratio.
In conjunction with a first aspect, in the first possible implementation of first aspect, described resultant signal y is by N number of sky
Line sends, and N is non-zero natural number, for k-th cell, K ∈ (1, N), described at least two antennas described in acquisition respectively
Symbol level noise, including：By the first equation group, the symbol level noise of at least two antennas, described first equation described in acquisition
Group includes：
Wherein, l is channel number, and n is antenna number, and k is cell number,Corresponding with k-th cell for antenna m
The variance of the symbol level noise of l channel；αnSignal energy for antenna n and pilot energy ratio, | hmn,k,l|2For k-th cell
On antennanAnd antenna m between the mould of the channel response of channel l square；M is antenna number, x
For digital signal sequences number, SF is coefficient,For Serial No. 1 on antenna m signal to the signal of Serial No. SF total energy
Amount.
In conjunction with first aspect the first may, in the possible implementation of the second of first aspect, described ask for
Cross covariance between the noise item of the noise item of described first pilot signal and described second pilot signal includes：
To signal noise z on any two antenna in described at least twom,k,lCarry out being conjugated correlation computations, construction bag
Containing the signal cross-correlation on each antenna, energy, noise, noise variance, noise cross-correlation, signal energy and pilot energy ratio,
The Conjugate Equation of channel response vector, wherein, m is antenna number, and l is channel number, and k is cell number, zm,k,lFor antenna m with
The noise of the corresponding l channel of k-th cell；
Obtain the noise item of described first pilot signal and the noise item of described second pilot signal according to described Conjugate Equation
Between cross covariance.
In conjunction with the possible implementation of the second of first aspect, in the third possible implementation of first aspect
In, described Conjugate Equation includes：
Wherein, SF is coefficient,
z1,k,lSignal noise for antenna 1 l channel in k-th cell；z2,k,lSignal for antenna 2 l channel in k-th cell
Noise；ForAverage, α1Signal energy for antenna 1 and pilot energy ratio, α2For antenna 2
Signal energy and pilot energy ratio,Between signal noise item for k-th cell channel l corresponding with two antennas
Cross covariance；For the cross covariance between signal noise item on two antennas, h11,k,lFor the antenna 1 in k-th cell with
The channel response of channel l, h between antenna 112,k,lFor the channel response of channel l between the antenna 2 in k-th cell and antenna 1,Channel response for channel l between the antenna 1 in k-th cell and antenna 2 is conjugated,For the sky in k-th cell
The channel response conjugation of channel l between line 2 and antenna 2.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation of first aspect
In, described according to described Conjugate Equation obtain the noise item of described first pilot signal and described second pilot signal noise item it
Between cross covariance, including：
Described Conjugate Equation is split as：
Real part equation：
Imaginary part equation：
Structural matrix equation is obtained according to the real part equation after splitting, imaginary part equation：
Wherein,
The channel response of at least two antennas described in described basis, the described symbol level noise of described at least two antennas is each
From noise variance, described first covariance, described second covariance and described cross covariance, at least two skies described in calculating
The respective energy of signal of line and pilot energy ratio, including：At least two according to the described Matrix division calculating constructing
The respective energy of signal of root antenna and pilot energy ratio.
In conjunction with the possible implementation of any one in first aspect, in the 5th kind of possible implementation of first aspect
In, during the noise of the pilot signal sending at least two antennas described in obtaining, described noise is processed as white Gaussian noise,
Described noise includes interference, presence of intercell interference and white noise between footpath.
Second aspect, the invention provides a kind of terminal device, including：
Reception device, for receiving the first pilot signal and second that transmission equipment is sent respectively by least two antennas
Pilot signal；
Descrambling and de-spreading device, for descrambling and de-spreading is carried out to described first pilot signal and described second pilot signal, point
Not Huo Qu described at least channel response of two antennas and symbol level noise；
Signal processing apparatus, for asking for first covariance and described of the noise item of described first pilot signal respectively
Second covariance of the noise item of two pilot signals, and the noise item of described first pilot signal and described second pilot signal
Noise item between cross covariance；
Estimation device, for the channel response according to described at least two antennas, the described symbol of described at least two antennas
Number respective noise variance of level noise, described first covariance, described second covariance and described cross covariance, calculate described
The respective energy of signal of at least two antennas and pilot energy ratio.
In conjunction with second aspect, in the first possible implementation of second aspect, described resultant signal y is by N number of sky
Line sends, and N is non-zero natural number, for k-th cell, K ∈ (1, N), and described reception device, specifically for：By first
Equation group, the symbol level noise of at least two antennas described in acquisition, described first equation group includes：
Wherein, l is channel number, and n is antenna number, and k is cell number,Corresponding with k-th cell for antenna m
The variance of the symbol level noise of l channel；αnSignal energy for antenna n and pilot energy ratio, | hmn,k,l|2For k-th cell
On antennanAnd antenna m between the mould of the channel response of channel l square；M is antenna number, x
For digital signal sequences number, SF is coefficient,For Serial No. 1 on antenna m signal to the signal of Serial No. SF total energy
Amount.
Possible in conjunction with the first of second aspect, in the possible implementation of the second of second aspect, described signal
Processing meanss specifically for：
To signal noise z on any two antenna in described at least twom,k,lCarry out being conjugated correlation computations, construction bag
Containing the signal cross-correlation on each antenna, energy, noise, noise variance, noise cross-correlation, signal energy and pilot energy ratio,
The Conjugate Equation of channel response vector, wherein, m is antenna number, and l is channel number, and k is cell number, zm,k,lFor antenna m with
The noise of the corresponding l channel of k-th cell；And noise item and the institute of described first pilot signal is obtained according to described Conjugate Equation
State the cross covariance between the noise item of the second pilot signal.
In conjunction with the possible implementation of the second of second aspect, in the third possible implementation of second aspect
In, described Conjugate Equation includes：
Wherein, SF is coefficient,
z1,k,lSignal noise for antenna 1 l channel in k-th cell；z2,k,lSignal for antenna 2 l channel in k-th cell
Noise；ForAverage, α1Signal energy for antenna 1 and pilot energy ratio, α2For antenna 2
Signal energy and pilot energy ratio,Between signal noise item for k-th cell channel l corresponding with two antennas
Cross covariance；For the cross covariance between signal noise item on two antennas, h11,k,lFor the antenna 1 in k-th cell with
The channel response of channel l, h between antenna 112,k,lFor the channel response of channel l between the antenna 2 in k-th cell and antenna 1,Channel response for channel l between the antenna 1 in k-th cell and antenna 2 is conjugated,For the sky in k-th cell
The channel response conjugation of channel l between line 2 and antenna 2.
In conjunction with the third possible implementation of second aspect, in the 4th kind of possible implementation of second aspect
In, described signal processing apparatus specifically for：
Described Conjugate Equation is split as：
Real part equation：
Imaginary part equation：
And structural matrix equation is obtained according to the real part equation after splitting, imaginary part equation：
Wherein,
Described estimation device, specifically for：At least two antennas according to the described Matrix division calculating constructing
The respective energy of signal and pilot energy ratio.
In conjunction with the possible implementation of any one in second aspect, in the 5th kind of possible implementation of second aspect
In, described reception device, when being additionally operable to the noise of pilot signal sending at least two antennas described in obtaining, by described noise
Process as white Gaussian noise, described noise includes interference, presence of intercell interference and white noise between footpath.
Estimate Ior/Ec method and terminal device in mimo system provided in an embodiment of the present invention, estimated using following methods
Signal energy and pilot energy ratio, first, receive, by M root termination device antenna, the resultant signal y that base station sends, and then, estimate
The channel response vector of each channel；Descrambling and de-spreading is carried out to the signal of each channel again, obtain the pilot tone letter on each channel
Number；Signal noise on this channel is obtained according to the pilot signal on each channel；And for each channel respectively according to described
The variance of noise, channel response vector, the first function relation of resultant signal y, signal energy and pilot energy ratio, construction comprise to
The equation group of few M equation；Estimate signal energy and pilot energy ratio, the said process of each transmitting antenna according to equation group
In, the relevant parameter according to signal estimates signal energy and pilot energy ratio, can obtain more accurate signal energy and lead
Frequency energy ratio, and do not increase extra information exchange between cell and terminal device, effectively save Radio Resource.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of flow chart estimating signal energy and pilot energy ratio method provided in an embodiment of the present invention；
Fig. 2 is another kind of flow chart estimating signal energy and pilot energy ratio method provided in an embodiment of the present invention；
Fig. 3 is the mimo system structural representation in the corresponding embodiment of Fig. 1, Fig. 2；
Fig. 4 is the flow chart of dispatching method in a kind of mimo system provided in an embodiment of the present invention；
Fig. 5 is CQI calculation process schematic diagram in the corresponding embodiment of Fig. 4；
Fig. 6 is a kind of terminal device structural representation provided in an embodiment of the present invention；
Fig. 7 is the structural representation of dispatching device in a kind of mimo system provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Embodiments provide a kind of estimation Ior/Ec method in mimo system, as shown in figure 1, including：
101st, descrambling and de-spreading is carried out to described first pilot signal and described second pilot signal, respectively described in acquisition at least
The channel response of two antennas and symbol level noise.
Such as：Cell is provided with N root antenna, has M*N channel between cell and terminal device, and each is estimated by terminal device
Channel, obtains channel response vector.In the present embodiment, cell base station passes through N root antenna to terminal device sending signal, terminal
During equipment process signal, can therefrom choose the signal that 2 antennas therein send, and by the present invention program to selected
The signal of 2 antenna transmissions is processed.
102nd, the first covariance of the noise item of described first pilot signal and described second pilot signal are asked for respectively
Between second covariance of noise item, and the noise item of described first pilot signal and the noise item of described second pilot signal
Cross covariance；
Described correlation calculation result includes the autocorrelation calculation result of the pilot signal that described each antenna sends, and institute
State the conjugation correlation calculation result between the pilot signal that different two antennas at least two send.
103rd, the channel response according to described at least two antennas, the described symbol level noise of described at least two antennas is each
From noise variance, described first covariance, described second covariance and described cross covariance, at least two skies described in calculating
The respective energy of signal of line and pilot energy ratio.
Terminal device obtains signal noise according to pilot signal, and in the embodiment of the present invention, terminal device specifically obtains noise letter
Number method using pilot tone reconstruct by the way of realize.
Terminal device by way of pilot tone reconstructs, can determine the variance of noise；Channel response vector can be by
Method is had to estimate to obtain；Resultant signal y can be calculated by existing method；In the present embodiment, only signal energy with lead
Frequency energy ratio is unknown, therefore, after listing the equation that above-mentioned variable is constituted, by solving to the equation, just can obtain
Signal energy and pilot energy ratio.
Estimate Ior/Ec method in the mimo system that the present embodiment provides, estimate signal energy and pilot tone using following methods
Energy ratio, first, receives, by M root termination device antenna, the resultant signal y that base station sends, then, estimates the channel of each channel
Response vector；Descrambling and de-spreading is carried out to the signal of each channel again, obtain the pilot signal on each channel；According to each channel
On pilot signal obtain the signal noise on this channel；And it is directed to each channel variance, channel according to described noise respectively
Response vector, the first function relation of resultant signal y, signal energy and pilot energy ratio, construction comprises the equation of at least M equation
Group；Estimate signal energy and the pilot energy ratio of each transmitting antenna according to equation group, in said process, corresponding according to signal
Parameter Estimation signal energy and pilot energy ratio, can obtain more accurate signal energy and pilot energy ratio, and not have
Increase extra information exchange between cell and terminal device, effectively save Radio Resource.
As a kind of improvement of the corresponding embodiment of Fig. 1, the embodiment of the present invention is provided in another kind of mimo system estimates Ior/
Ec method, terminal device is provided with least one antenna, is set with having the terminal of two antenna R1 and R2 in this enforcement mimo system
Illustrate as a example standby, specifically as shown in Fig. 2 the method includes：
201st, terminal device receives the first pilot signal and second that transmission equipment is sent respectively by least two antennas
Pilot signal.
Generally have multiple cells to terminal device sending signal, each cell is provided with least one antenna, the present invention is real
Apply in example, each cell is not described, taking number cell as k as a example illustrate, the function of other cells and operation
Can analogy.
As shown in figure 3, the cell that this numbering is k is provided with two antennas of T1 and T2, this numbering is base station and the terminal device of k
Between carried out data transmission by channel 11, channel 12, channel 21, channel 22.Wherein, terminal device can pass through 2 root termination
Device antenna receives the resultant signal y that cell sends.
And the resultant signal from multiple cells is calculated by formula (1),(1), formula 1
In, y (x) is the signal that terminal device is x from the sequence that 1 to k-th terminal device receives, and x is digital signal sequences, k
For cell number, hk=[hk,1,…,hk,L]TFor the channel response vector of cell k,lFor channel number,For the transmission signal vector of cell k, v (x) is independent identically distributed gaussian random
Variable,
202nd, descrambling and de-spreading is carried out to described first pilot signal and described second pilot signal, respectively described in acquisition at least
The channel response of two antennas.
Terminal device carries out channel estimation to each cell, and for k-th cell, terminal device is respectively to channel 11, letter
Road 12, channel 21, channel 22 are estimated, obtain k-th cell channel response vector hk, channel estimation in the embodiment of the present invention
Method adopts prior art to realize, and here is omitted.
203rd, the first equation group, the symbol level noise of at least two antennas described in acquisition are passed through.
Described first equation group includes：
Wherein, l is channel number, and n is antenna number, and k is cell number,Corresponding with k-th cell for antenna m
The variance of the symbol level noise of l channel.αnSignal energy for antenna n and pilot energy ratio, | hmn,k,l|2For k-th cell
On antennanAnd antenna m between the mould of the channel response of channel l square.M is antenna number, x
For digital signal sequences number, SF is coefficient,For Serial No. 1 on antenna m signal to the signal of Serial No. SF total energy
Amount.
204th, the first covariance of the noise item of described first pilot signal and described second pilot signal are asked for respectively
Second covariance of noise item.
205, to signal noise z on any two antenna in described at least twom,k,lCarry out being conjugated correlation computations, structure
Make the signal cross-correlation comprising on each antenna, energy, noise, noise variance, noise cross-correlation, signal energy and pilot energy
Conjugate Equation than, channel response vector.
Wherein, m is antenna number, and l is channel number, and k is cell number, zm,k,lCorresponding with k-th cell for antenna m
The noise of l channel.
206, the noise item of described first pilot signal and making an uproar of described second pilot signal are obtained according to described Conjugate Equation
Cross covariance between sound item.
Wherein, described Conjugate Equation includes：
Wherein, SF is coefficient,
z1,k,lSignal noise for antenna 1 l channel in k-th cell.z2,k,lSignal for antenna 2 l channel in k-th cell
Noise.ForAverage, α1Signal energy for antenna 1 and pilot energy ratio, α2For antenna 2
Signal energy and pilot energy ratio,Between signal noise item for k-th cell channel l corresponding with two antennas
Cross covariance.For the cross covariance between signal noise item on two antennas, h11,k,lFor the antenna 1 in k-th cell with
The channel response of channel l, h between antenna 112,k,lFor the channel response of channel l between the antenna 2 in k-th cell and antenna 1,Channel response for channel l between the antenna 1 in k-th cell and antenna 2 is conjugated,For the sky in k-th cell
The channel response conjugation of channel l between line 2 and antenna 2.
Specifically, for the present embodiment, terminal device carries out descrambling and de-spreading, descrambling and de-spreading to receipt signal on every antenna
Noise z afterwardsk,lBetween including footpath, interference, presence of intercell interference and white noise, can approximately regard white Gaussian noise as, and white noise is ability
Domain known technology, specifically refers to power spectral density equally distributed noise in whole frequency domain.All frequencies have identical energy
Random noise be referred to as white noise, do not repeat herein.Its average is zero, and variance isFor：
In formula (1), formula (2),In this formula, x is digital signal sequences number,
SF is coefficient,For Serial No. 1 on terminal device antenna 1,2 signal to the signal of Serial No. SF gross energy.L is letter
Road is numbered, and k is cell number,Symbol level noise for terminal device antenna R1 l channel corresponding with k-th cell
Variance,Variance for the symbol level noise of terminal device antenna R2 l channel corresponding with k-th cell.α1For launching sky
The signal energy of line T1 and pilot energy ratio, α2Signal energy for transmitting antenna T2 and pilot energy ratio, | h11,k,l|2For kth
Between transmitting antenna T1 in individual cell and terminal device antenna R1 the mould of channel of channel l square, | h12,k,l|2For k-th
Between transmitting antenna T2 in cell and terminal device antenna R1 the mould of channel response of channel l square, | h21,k,l|2For kth
Between transmitting antenna T1 in individual cell and terminal device antenna R2 the mould of channel response of channel l square, | h22,k,l|2For
Between transmitting antenna T2 in k-th cell and terminal device antenna R2 the mould of channel response of channel l square.
In formula (1), formula (2), only α1、α2For variable, other all can be obtained by the mode such as estimating, calculating, if
Do not consider the cross-correlation between each antenna, now it is already possible to α is solved by formula (1), formula (2)1、α2, for being provided with L
The terminal device of individual antenna, can individually calculate signal energy on each antenna and with pilot energy ratio and adopt maximum-ratio combing,
Two maximum reception antennas of signal to noise ratio can also be chosen.
Wherein, the noise item of described first pilot signal and making an uproar of described second pilot signal are obtained according to described Conjugate Equation
Cross covariance between sound item, specific embodiment can include：
Described Conjugate Equation is split as real part equation and imaginary part equation.
Real part equation：
Imaginary part equation：
Structural matrix equation is obtained according to the real part equation after splitting, imaginary part equation：
In formula (5), each matrix is as follows,
When being calculated from two footpaths, formula (5b) specifically can be write as：
In above-mentioned formula, z1,k,lWith z2,k,lIt is the noise on symbol level after descrambling and de-spreading.Terminal device can pass through pilot tone
Reconstruct sending signal, and deduct this reconstruction signal pilot data after descrambling and de-spreading, to obtain z1,k,lAnd z2,k,l.
207th, according to the described Matrix division constructing calculates the respective energy of signal of at least two antennas with
Pilot energy ratio.
Order
Then have
α can be tried to achieve by formula (6)1、α2.Solve α1、α2Process can adopt the criterion such as LMS, LMS criterion is ability
Known technology known to field technique personnel, here is omitted.
When there being following equation (10) (11) (12) to set up, maximum likelihood solution can be tried to achieve out.
Trying to achieve maximum likelihood solution is：
Wherein,H′k,lOnly contain k-th cell,
The l channel, if there are a plurality of channel, then extends H 'kLine number,
Its dependent variable the like.
Observe formula (18) and be known that if α only has a line variable, if that is, cell only has a transmitting antenna, with
Maximum-ratio combing is of equal value.
When cell has the transmitting antenna more than two, receiving it can be deduced accordingly, and obtain on a plurality of transmitting antenna
Signal energy compare Ior/Ec with pilot energy.
Estimate Ior/Ec method in the mimo system that the present embodiment provides, estimate signal energy and pilot tone using following methods
Energy ratio, first, receives, by M root termination device antenna, the resultant signal y that base station sends, then, estimates the channel of each channel
Response vector；Descrambling and de-spreading is carried out to the signal of each channel again, obtain the pilot signal on each channel；According to each channel
On pilot signal obtain the signal noise on this channel；And it is directed to each channel variance, channel according to described noise respectively
Response vector, the first function relation of resultant signal y, signal energy and pilot energy ratio, construction comprises the equation of at least M equation
Group；Estimate signal energy and the pilot energy ratio of each transmitting antenna according to equation group, in said process, corresponding according to signal
Parameter Estimation signal energy and pilot energy ratio, can obtain more accurate signal energy and pilot energy ratio, and not have
Increase extra information exchange between cell and terminal device, effectively save Radio Resource.And, not only allow for antenna
Auto-correlation it is also contemplated that cross-correlation between each antenna, make the signal energy calculating more accurate with pilot energy ratio.
There is the hybrid network that MIMO is coexisted with non-MIMO in mimo system, described MIMO-UE is to support multiple-input and multiple-output
Terminal, described nonMIMO-UE is the terminal not supporting multiple-input and multiple-output, on the main antenna in cell transmitting dominant pilot,
Signaling channel, MIMO PDSCH and nonMIMO PDSCH；On auxiliary antenna, frequency and MIMO PDSCH channel are taught in transmitting, teach
The transmission power of frequency is variable, and is less than or equal to main pilot power.Power bias between major-minor pilot tone can be informed MIMO by network
UE.This scheme can preferably solve the problems, such as mixed networking, but it will be seen that the transmission power on virtual-antenna is uneven
Weighing apparatus, and this can affect the performance of terminal device.And for nonMIMO UE, the signal on the auxiliary antenna of terminal device can be right
It causes extra interference；For MIMO UE, on main antenna, the nonMIMO PDSCH signal of transmitting can cause its performance
Decline.In order to solve this technical problem, embodiments provide dispatching method in a kind of mimo system, as shown in figure 4,
Methods described includes：
401st, the business proportion according to MIMO-UE and nonMIMO-UE or quantitative proportion determine the first moment, second when
Carve.
One user scheduling table can be stored on cell, have recorded in this table MIMO-UE and nonMIMO-UE scheduling when
Between distribute, as the case may be the time be assigned situations below：
The first situation, in mimo system, the quantity of MIMO-UE and nonMIMO-UE is about the same, believes in user scheduling table
The scheduling time of breath instruction MIMO-UE and nonMIMO-UE is equal, and for example, scheduling time is all set to 50ms, and that is, current 50ms adjusts
Degree MIMO-UE, next 50ms dispatch nonMIMO-UE, are and so on scheduling；
Second situation, in mimo system, MIMO-UE quantity is significantly more than the quantity of nonMIMO-UE, in user scheduling table
Information indicates the scheduling time of MIMO-UE and nonMIMO-UE, for example, the scheduling time of MIMO-UE is set to 50ms, will
The scheduling time of nonMIMO-UE is set to 10ms, i.e. current 50ms scheduling MIMO-UE, and next 10ms dispatches nonMIMO-UE, such as
This is back and forth scheduling；
Other situations, MIMO-UE and nonMIMO-UE scheduling time, also regular unlike second situation
Repeat, but concrete regulation is carried out according to the usage frequency of concrete time period MIMO-UE and nonMIMO-UE business, such as the morning 9：
00MIMO-UE usage frequency is high, then user scheduling table is long in MIMO-UE scheduling time this time period, etc..
The distribution of this time can be default or RNC () is according to MIMO-UE and nonMIMO-UE in this cell
Scheduling rate ratio, throughput ratio, or the quantitative proportion distribution of activation UE.If default, can be networking or arrange net
Or other time is default, in this case, step 401 can be omitted.
402nd, only dispatch MIMO-UE in the first moment, and the physical down of nonMIMO-UE is not launched on main antenna
Shared channel PDSCH.
When dispatching MIMO-UE, MIMO-UE calculates signal noise ratio according to auxiliary pilot power, main pilot power.
In the present embodiment, the power due to teaching frequency is variable, so MIMO UE is when calculating CQI, needs will be taught
Frequency power is converted to calculate SNR to main pilot power, and obtains CQI and report cell.Conversion process is will to teach the energy of frequency
It is multiplied by the ratio Ec of main and auxiliary pilot energy1/Ec2.Meanwhile, the PowerOffset value that upper strata is assigned is if dominant pilot and guidance frequency
Power sum, then the SNR after conversion needs to modify, then obtain CQI with amended SNR and report.
Specifically,
Wherein Bias_dB=10*log10 (PowerSCPICH/PowerCPICH).
For the pilot energy sum after conversion, therefore report the CQI real PowerOffset factor taken advantage of of needs to be
Be converted to linear value
Further alternative, methods described also includes：
403rd, only dispatch nonMIMO-UE in the second moment, and up to launch auxiliary pilot signal in auxiliary antenna.
When dispatching nonMIMO-UE, the Ior/Ec estimating when MIMO-UE is using last being scheduled carries out equilibrium meter
Calculate.
When dispatching the user of nonMIMO, now there is no business to MIMO UE, and MIMO UE needs to report CQI
Value.But in two different scheduling instance, the transmission power of NodeB becomes, the corresponding Ior/Ec value of major-minor pilot tone also becomes,
I.e. when dispatching nonMIMO user, the CQI of MIMO UE report can not truly reflect channel quality during scheduling MIMO user.
For MIMO-UE, using Ior/Ec during last scheduling MIMO user during equilibrium, equalizing coefficient is calculated
Come.Then the channel estimation after equalizing coefficient and channel estimation convolution being equalized, the noise power estimation after equilibrium
Can also be calculated, idiographic flow is as shown in figure 5, include：
Estimate the Ior/Ec obtaining and channel estimation parameter when the first step, MIMO-UE are using last being scheduled and make an uproar
Acoustical power is estimated to calculate equalizing coefficient, and carries out equalization filtering.
Second step, equalizing coefficient and channel estimation convolution are equalized after channel estimation.
3rd step, according to equalizing coefficient and noise power estimation calculate Jun Heng after noise power estimation.
4th step, according to equilibrium after channel estimation and equilibrium after noise power estimation calculate CQI.
Further alternative, methods described can also include：
404th, described MIMO-UE estimates Ior/ with described nonMIMO-UE according to Fig. 1, Fig. 2 corresponding embodiment methods described
Ec.
Note, step 402, step 403 do not have sequencing when implementing, and the present embodiment merely illustrates a kind of implementation status,
Specific execution sequence, determines according to actual conditions.
Cell makes MIMO-UE and nonMIMO-UE not same in dispatch terminal equipment by the way of timesharing scheduling
Moment is scheduled simultaneously, and in the first moment, only scheduling MIMO user, does not now have the PDSCH of nonMIMO on main antenna,
Unbalanced power on two such virtual-antenna will not be very serious；In the moment 2, only scheduling nonMIMO user, now in auxiliary sky
Only have auxiliary pilot signal on line, can be removed by interference elimination method, effectively improve systematic function.
In order to realize estimating Ior/Ec method, the embodiment of the present invention in the mimo system that the corresponding embodiment of Fig. 1, Fig. 2 is recorded
Provide a kind of terminal device, as shown in fig. 6, including：.
Reception device 61, for receiving the first pilot signal and that transmission equipment is sent respectively by least two antennas
Two pilot signals；
Descrambling and de-spreading device 62, for descrambling and de-spreading is carried out to described first pilot signal and described second pilot signal,
At least channel response of two antennas and symbol level noise described in obtaining respectively；
Signal processing apparatus 63, for asking for first covariance of noise item of described first pilot signal and described respectively
Second covariance of the noise item of the second pilot signal, and described first pilot signal noise item and described second pilot tone letter
Number noise item between cross covariance；
Estimation device 64, for the channel response according to described at least two antennas, described at least two antennas described
The respective noise variance of symbol level noise, described first covariance, described second covariance and described cross covariance, calculate institute
State the respective energy of signal and the pilot energy ratio of at least two antennas.
The terminal device that the present embodiment provides, estimates signal energy and pilot energy ratio using following methods, first, passes through
M root termination device antenna receives the resultant signal y that base station sends, and then, estimates the channel response vector of each channel；Again to each
The signal of channel carries out descrambling and de-spreading, obtains the pilot signal on each channel；Obtained according to the pilot signal on each channel
Signal noise on this channel；And for each channel respectively according to the variance of described noise, channel response vector, resultant signal y,
Signal energy and the first function relation of pilot energy ratio, construct the equation group comprising at least M equation；Estimated according to equation group
The signal energy of each transmitting antenna and pilot energy ratio, in said process, the relevant parameter according to signal estimates signal energy
With pilot energy ratio, more accurately signal energy and pilot energy ratio can be obtained, and not increase cell and terminal sets
Between standby, extra information exchange, has effectively saved Radio Resource.
Specifically, in the present embodiment, described reception device 61, specifically for：By the first equation group, described in acquisition extremely
The symbol level noise of few two antennas.Wherein, described resultant signal y is sent by N number of antenna, and N is non-zero natural number, for the
K cell, K ∈ (1, N).
Described first equation group includes：
Wherein, l is channel number, and n is antenna number, and k is cell number,Corresponding with k-th cell for antenna m
The variance of the symbol level noise of l channel；αnSignal energy for antenna n and pilot energy ratio, | hmn,k,l|2For k-th cell
On antennanAnd antenna m between the mould of the channel response of channel l square；M is antenna number, x
For digital signal sequences number, SF is coefficient,For Serial No. 1 on antenna m signal to the signal of Serial No. SF total energy
Amount.
Further, described signal processing apparatus 63 specifically for：To on any two antenna in described at least two
Signal noise zm,k,lCarry out being conjugated correlation computations, construct the signal cross-correlation comprising on each antenna, energy, noise, noise
Variance, noise cross-correlation, signal energy and pilot energy ratio, the Conjugate Equation of channel response vector, wherein, m is antenna number,
L is channel number, and k is cell number, zm,k,lNoise for antenna m l channel corresponding with k-th cell；And according to described
Conjugate Equation obtains the cross covariance between the noise item of described first pilot signal and the noise item of described second pilot signal.
Wherein, described Conjugate Equation includes：
Wherein, SF is coefficient,
z1,k,lSignal noise for antenna 1 l channel in k-th cell；z2,k,lSignal for antenna 2 l channel in k-th cell
Noise；ForAverage, α1Signal energy for antenna 1 and pilot energy ratio, α2For antenna 2
Signal energy and pilot energy ratio,Between signal noise item for k-th cell channel l corresponding with two antennas
Cross covariance；For the cross covariance between signal noise item on two antennas, h11,k,lFor the antenna 1 in k-th cell with
The channel response of channel l, h between antenna 112,k,lFor the channel response of channel l between the antenna 2 in k-th cell and antenna 1,Channel response for channel l between the antenna 1 in k-th cell and antenna 2 is conjugated,For the sky in k-th cell
The channel response conjugation of channel l between line 2 and antenna 2.
Described signal processing apparatus 63 specifically for：
Wherein it is possible to described Conjugate Equation is split as：
Real part equation：
Imaginary part equation：
And structural matrix equation is obtained according to the real part equation after splitting, imaginary part equation：
Wherein,
Described estimation device 64, specifically for：At least two skies according to the described Matrix division calculating constructing
The respective energy of signal of line and pilot energy ratio.
Optionally, described reception device 61, is additionally operable to making an uproar of the pilot signal that at least two antennas described in obtain send
During sound, described noise is processed as white Gaussian noise, described noise includes interference, presence of intercell interference and white noise between footpath.
In order to realize dispatching method in the mimo system that the corresponding embodiment of Fig. 4 is recorded, embodiments provide one kind
Dispatching device in mimo system, as shown in fig. 7, described mimo system includes two kinds of terminals of MIMO-UE and nonMIMO-UE, described
MIMO-UE supports multiple-input and multiple-output, and described nonMIMO-UE do not support multiple-input and multiple-output, described MIMO-UE and described
NonMIMO-UE will not be scheduled simultaneously, and described device includes：First scheduling unit 91, the second scheduling unit 92, moment determine
Unit 93.
Wherein, the first scheduling unit 91, for only dispatching MIMO-UE in the first moment, and does not launch on main antenna
The Physical Downlink Shared Channel of nonMIMO-UE.
Further alternative, also include：
Second scheduling unit 92, for only dispatching nonMIMO-UE in the second moment, and up to launches auxiliary in auxiliary antenna
Pilot signal.
Preferably, described first moment, the second moment make an appointment；
Further alternative, described device also includes：
Moment determining unit 93, determines for the business proportion according to MIMO-UE and nonMIMO-UE or quantitative proportion
One moment, the second moment.
Preferably,
Described MIMO-UE and described nonMIMO-UE is provided with terminal device described in any one of claim 16-22；Or,
Described MIMO-UE and described nonMIMO-UE is provided with balanced device described in claim 23.
Preferably,
, when dispatching MIMO-UE, MIMO-UE is according to auxiliary pilot power, main pilot power meter for described first scheduling unit 91
Calculate signal noise ratio.
Preferably,
Described second scheduling unit 92, when dispatching nonMIMO-UE, estimates when MIMO-UE is using last being scheduled
Ior/Ec carry out equilibrium calculation.
Dispatching device in the mimo system that the present embodiment provides, estimates signal energy and pilot energy using following methods
Ratio first, receives, by M root termination device antenna, the resultant signal y that base station sends, then, estimates the channel response of each channel
Vector；Descrambling and de-spreading is carried out to the signal of each channel again, obtain the pilot signal on each channel；According on each channel
Pilot signal obtains the signal noise on this channel；And it is directed to each channel variance, channel response according to described noise respectively
The first function relation of vector, resultant signal y, signal energy and pilot energy ratio, construction comprises the equation group of at least M equation；
Estimate signal energy and the pilot energy ratio of each transmitting antenna according to equation group, in said process, according to the corresponding ginseng of signal
Number estimates signal energy and pilot energy ratio, can obtain more accurate signal energy and pilot energy ratio, and not increase
Plus extra information exchange between cell and terminal device, effectively save Radio Resource.
Embodiments provide a kind of base station, including：Dispatching device and antenna, described dispatching device corresponds to for Fig. 7
The described dispatching device that embodiment is recorded, antenna is passed through to terminal sending signal in described base station, and described dispatching device is used for realizing
The scheduling to terminal for the base station.
The base station that the present embodiment provides, estimates signal energy and pilot energy ratio using following methods, first, by M root
Terminal device antenna receives the resultant signal y that base station sends, and then, estimates the channel response vector of each channel；Again to each letter
The signal in road carries out descrambling and de-spreading, obtains the pilot signal on each channel；It is somebody's turn to do according to the pilot signal on each channel
Signal noise on channel；And for each channel respectively according to the variance of described noise, channel response vector, resultant signal y, letter
Number energy and the first function relation of pilot energy ratio, construction comprises the equation group of at least M equation；Every according to equation group estimation
The signal energy of individual transmitting antenna and pilot energy ratio, in said process, according to the relevant parameter of signal estimate signal energy with
Pilot energy ratio, can obtain more accurate signal energy and pilot energy ratio, and not increase cell and terminal device
Between extra information exchange, effectively saved Radio Resource.
The various embodiments described above, the Ior/Ec on every antenna of cell can be adjusted according to different business, terminal device
The current Ior/Ec of cell can more accurately be known.Terminal device is according to the current Ior/Ec obtaining to be equalized.?
In the case of not increasing transmitter transmission data, the embodiment of the present invention may be used on the Ior/Ec method of estimation in mimo system.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can borrow
Help software to add the mode of necessary common hardware to realize naturally it is also possible to pass through hardware, but the former is more preferably in many cases
Embodiment.Based on such understanding, the portion that technical scheme substantially contributes to prior art in other words
Divide and can be embodied in the form of software product, or solidification is in the chips, this estimation machine software product is stored in and can read
Storage medium in, such as estimate the floppy disk of machine, hard disk or CD etc., include some instructions with so that one is estimated machine equipment
(can be personal estimation machine, server, or network equipment etc.) executes the method described in each embodiment of the present invention.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should described be defined by scope of the claims.
Claims (12)
1. a kind of estimation signal energy and pilot energy ratio method are it is characterised in that be used for a kind of wireless terminal, described wireless end
Hold for receiving the first pilot signal and the second pilot signal that transmission equipment is sent respectively, described side by least two antennas
Method includes：
Descrambling and de-spreading is carried out to described first pilot signal and described second pilot signal, respectively at least two antennas described in acquisition
Channel response and symbol level noise；
Ask for the first covariance of the noise item of described first pilot signal and the noise item of described second pilot signal respectively
Mutual association side between second covariance, and the noise item of described first pilot signal and the noise item of described second pilot signal
Difference；
According to the channel response of described at least two antennas, the respective noise of described symbol level noise of described at least two antennas
Variance, described first covariance, described second covariance and described cross covariance, the signal of at least two antennas described in calculating
Respective energy and pilot energy ratio.
2. it is characterised in that resultant signal y is sent by N number of antenna, N is that non-zero is natural to method according to claim 1
Number, for k-th cell, K ∈ (1, N), described obtain respectively described at least two antennas symbol level noise, including：Pass through
First equation group, the symbol level noise of at least two antennas described in acquisition, described first equation group includes：
Wherein, l is channel number, and n is antenna number, and k is cell number,For antenna m l corresponding with k-th cell letter
The variance of the symbol level noise in road；αnSignal energy for antenna n and pilot energy ratio, | hmn,k,l|2For the sky in k-th cell
Between line n and antenna m the mould of the channel response of channel l square；M is antenna number, and x is number
Word burst number, SF is coefficient,For Serial No. 1 on antenna m signal to the signal of Serial No. SF gross energy.
3. method according to claim 2 is it is characterised in that the described noise item asking for described first pilot signal and institute
The cross covariance stated between the noise item of the second pilot signal includes：
To signal noise z on any two antenna in described at least twom,k,lCarry out being conjugated correlation computations, construction comprises each
Signal cross-correlation on individual antenna, energy, noise, noise variance, noise cross-correlation, signal energy and pilot energy ratio, channel
The Conjugate Equation of response vector, wherein, m is antenna number, and l is channel number, and k is cell number, zm,k,lFor antenna m and kth
The noise of the corresponding l channel of individual cell；
Obtained between the noise item of described first pilot signal and the noise item of described second pilot signal according to described Conjugate Equation
Cross covariance.
4. method according to claim 3 is it is characterised in that described Conjugate Equation includes：
Wherein, SF is coefficient, z1,k,l
Signal noise for antenna 1 l channel in k-th cell；z2,k,lSignal noise for antenna 2 l channel in k-th cell；ForAverage, α1Signal energy for antenna 1 and pilot energy ratio, α2Signal energy for antenna 2
Amount and pilot energy ratio,For the mutual association side between the signal noise item of k-th cell channel l corresponding with two antennas
Difference；For the cross covariance between signal noise item on two antennas, h11,k,lFor the antenna 1 in k-th cell and antenna 1
Between channel l channel response, h12,k,lFor the channel response of channel l between the antenna 2 in k-th cell and antenna 1,
Channel response for channel l between the antenna 1 in k-th cell and antenna 2 is conjugated,For the antenna 2 in k-th cell with
The channel response conjugation of channel l between antenna 2.
5. method according to claim 4 is it is characterised in that described obtain described first pilot tone letter according to described Conjugate Equation
Number noise item and the noise item of described second pilot signal between cross covariance, including：
Described Conjugate Equation is split as：
Real part equation：
Imaginary part equation：
Structural matrix equation is obtained according to the real part equation after splitting, imaginary part equation：
Wherein,
The channel response of at least two antennas described in described basis, the described symbol level noise of described at least two antennas is respective
Noise variance, described first covariance, described second covariance and described cross covariance, at least two antennas described in calculating
The respective energy of signal and pilot energy ratio, including：At least two skies according to the described Matrix division calculating constructing
The respective energy of signal of line and pilot energy ratio.
6. the method according to any one of claim 1-5 is it is characterised in that what at least two antennas described in obtain sent
During the noise of pilot signal, described noise is processed as white Gaussian noise, described noise includes interference between footpath, minizone is done
Disturb and white noise.
7. a kind of terminal device is it is characterised in that include：
Reception device, for receiving the first pilot signal and the second pilot tone that transmission equipment is sent respectively by least two antennas
Signal；
Descrambling and de-spreading device, for carrying out descrambling and de-spreading to described first pilot signal and described second pilot signal, obtains respectively
At least channel response of two antennas and symbol level noise described in taking；
Signal processing apparatus, the first covariance and described second for asking for the noise item of described first pilot signal respectively is led
Second covariance of the noise item of frequency signal, and the noise item of described first pilot signal and making an uproar of described second pilot signal
Cross covariance between sound item；
Estimation device, for the channel response according to described at least two antennas, the described symbol level of described at least two antennas
The respective noise variance of noise, described first covariance, described second covariance and described cross covariance, described in calculating at least
The respective energy of signal of two antennas and pilot energy ratio.
8. it is characterised in that resultant signal y is sent by N number of antenna, N is non-zero to terminal device according to claim 7
Natural number, for k-th cell, K ∈ (1, N), described reception device, specifically for：By the first equation group, described in acquisition extremely
The symbol level noise of few two antennas, described first equation group includes：
Wherein, l is channel number, and n is antenna number, and k is cell number,For antenna m l corresponding with k-th cell letter
The variance of the symbol level noise in road；αnSignal energy for antenna n and pilot energy ratio, | hmn,k,l|2For the sky in k-th cell
LinenAnd antenna m between the mould of the channel response of channel l square；M is antenna number, and x is numeral
Burst number, SF is coefficient,For Serial No. 1 on antenna m signal to the signal of Serial No. SF gross energy.
9. terminal device according to claim 8 it is characterised in that described signal processing apparatus specifically for：
To signal noise z on any two antenna in described at least twom,k,lCarry out being conjugated correlation computations, construction comprises each
Signal cross-correlation on individual antenna, energy, noise, noise variance, noise cross-correlation, signal energy and pilot energy ratio, channel
The Conjugate Equation of response vector, wherein, m is antenna number, and l is channel number, and k is cell number, zm,k,lFor antenna m and kth
The noise of the corresponding l channel of individual cell；And the noise item of described first pilot signal and described is obtained according to described Conjugate Equation
Cross covariance between the noise item of the second pilot signal.
10. terminal device according to claim 9 is it is characterised in that described Conjugate Equation includes：
Wherein, SF is coefficient, z1,k,l
Signal noise for antenna 1 l channel in k-th cell；z2,k,lSignal noise for antenna 2 l channel in k-th cell；ForAverage, α1Signal energy for antenna 1 and pilot energy ratio, α2Signal energy for antenna 2
Amount and pilot energy ratio,For the mutual association side between the signal noise item of k-th cell channel l corresponding with two antennas
Difference；For the cross covariance between signal noise item on two antennas, h11,k,lFor the antenna 1 in k-th cell and antenna 1
Between channel l channel response, h12,k,lFor the channel response of channel l between the antenna 2 in k-th cell and antenna 1,
Channel response for channel l between the antenna 1 in k-th cell and antenna 2 is conjugated,For the antenna 2 in k-th cell with
The channel response conjugation of channel l between antenna 2.
11. terminal devices according to claim 10 it is characterised in that described signal processing apparatus specifically for：
Described Conjugate Equation is split as：
Real part equation：
Imaginary part equation：
And structural matrix equation is obtained according to the real part equation after splitting, imaginary part equation：
Wherein,
Described estimation device, specifically for：The letter of at least two antennas according to the described Matrix division calculating constructing
Number respective energy and pilot energy ratio.
12. terminal devices according to any one of claim 7-11, it is characterised in that described reception device, are additionally operable to
During the noise of pilot signal that at least two antennas described in acquisition send, described noise is processed as white Gaussian noise, described
Noise includes interference, presence of intercell interference and white noise between footpath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310739728.1A CN103746946B (en) | 2013-12-27 | 2013-12-27 | Method for estimating Ior/Ec in multiple input multiple output communication (MIMO) system and terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310739728.1A CN103746946B (en) | 2013-12-27 | 2013-12-27 | Method for estimating Ior/Ec in multiple input multiple output communication (MIMO) system and terminal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103746946A CN103746946A (en) | 2014-04-23 |
| CN103746946B true CN103746946B (en) | 2017-02-15 |
Family
ID=50503935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310739728.1A Expired - Fee Related CN103746946B (en) | 2013-12-27 | 2013-12-27 | Method for estimating Ior/Ec in multiple input multiple output communication (MIMO) system and terminal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103746946B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634626B (en) * | 2014-11-07 | 2019-02-22 | 联芯科技有限公司 | The measurement method and system of channel quality indicator in space time transmit diversity system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7280581B2 (en) * | 2003-05-12 | 2007-10-09 | Lucent Technologies Inc. | Method of adaptive Walsh code allocation |
| CN101473554A (en) * | 2006-06-26 | 2009-07-01 | 艾利森电话股份有限公司 | Using covariance matrices for link selection in MIMO communication system |
| US7852810B1 (en) * | 2007-01-03 | 2010-12-14 | Sprint Spectrum L.P. | Dynamic adjustment of forward-link frame-error-rate (FFER) target |
| CN102111181A (en) * | 2011-03-18 | 2011-06-29 | 华为技术有限公司 | Method and device for estimating energy per chip (Ec)/total transmitting power spectral density (Ior) |
-
2013
- 2013-12-27 CN CN201310739728.1A patent/CN103746946B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7280581B2 (en) * | 2003-05-12 | 2007-10-09 | Lucent Technologies Inc. | Method of adaptive Walsh code allocation |
| CN101473554A (en) * | 2006-06-26 | 2009-07-01 | 艾利森电话股份有限公司 | Using covariance matrices for link selection in MIMO communication system |
| US7852810B1 (en) * | 2007-01-03 | 2010-12-14 | Sprint Spectrum L.P. | Dynamic adjustment of forward-link frame-error-rate (FFER) target |
| CN102111181A (en) * | 2011-03-18 | 2011-06-29 | 华为技术有限公司 | Method and device for estimating energy per chip (Ec)/total transmitting power spectral density (Ior) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103746946A (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104541456B (en) | A kind of method, user equipment and the base station of reporting channel status information | |
| CN104753647B (en) | A kind of signaling method and device | |
| CN101374034B (en) | Down and up multi-user multi-input multi-output pre-coding method | |
| CN104620527B (en) | Determine method, receiving device and the sending device of pre-coding matrix instruction | |
| CN104094547B (en) | Method, user equipment and the base station of reporting channel status information | |
| CN103621000B9 (en) | Determine method, user equipment, the base station enode of pre-coding matrix instruction | |
| US20180076863A1 (en) | Precoder structure for mimo precoding | |
| CN103457651B (en) | Joint channel bearing calibration, joint channel correction unit and base station | |
| RU2527930C2 (en) | Precoding method and apparatus based on mixed multiplexing demodulation reference signals | |
| CN104184537B (en) | Channel information feedback method and device in a kind of mobile communication system | |
| CN103152090B (en) | Recoding processing method, codebook set and base station | |
| CN105636105B (en) | Measure pilot tone transmission, detection method, device, base station and terminal | |
| CN105164955B (en) | Wireless communication device and wireless communications method | |
| CN106953676A (en) | Wireless communications method and Wireless Telecom Equipment | |
| CN104348592A (en) | CSI process configuration method and base station, and CSI feedback method and user equipment | |
| CN101764632B (en) | Mapping method and device of ports and antennae in long term evolution-time division duplex (LTE-TDD) indoor distribution system | |
| CN102300326B (en) | Scheduling method of multi-user multi-input multi-output (MIMO) communication system and base station | |
| CN107733505A (en) | A kind of wave beam forming training method, terminal and base station | |
| CN105337683A (en) | Emission weighting method and apparatus for CSI feedback system | |
| CN102100045B (en) | Data transmitting processing method and apparatus, data receiving processing method and apparatus | |
| CN106209188B (en) | Pilot pollution reduction method based on partial pilot frequency alternate multiplexing in large-scale MIMO system | |
| CN104253639B (en) | Obtain the method and device of channel quality instruction | |
| CN103746946B (en) | Method for estimating Ior/Ec in multiple input multiple output communication (MIMO) system and terminal device | |
| Zhang et al. | Joint transmission for LTE-advanced systems with non-full buffer traffic | |
| CN106160925A (en) | The method and device strengthened for the CQI of multi-user's stacking transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170215 Termination date: 20181227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |