CN103001742A - Method and device for open-loop MIMO (multi-input multi-output) transmission on basis of demodulation reference signal - Google Patents

Abstract

The invention discloses a method for open-loop MIMO (multi-input multi-output) transmission on the basis of a demodulation reference signal. The method includes the steps of mapping data to be transmitted in every level to a DMRS (demodulation reference signal) port via a first weight value according to regulations set by both a transmitter and a receiver, mapping DMRS port data to a CSI-RS (channel state information-reference signal) port or a physical antenna via a second weight value, and transmitting. The invention further discloses a device for the open-loop MIMO transmission on the basis of the demodulation reference signal. The limit that a same PRB (physical resource block) must utilize an identical precoding weight value is avoided, and larger diversity gain can be obtained. The characteristics that direction information in a communication system evolves slowly and phase information in different polarizing directions evolves quickly is fully utilized. In addition, on different PRB or frequency bands, different second weight values can be utilized to realize the mapping from the DMRS port to the CSI-RS port, and thereby diversity effect is further improved.

Description

Open loop MIMO transmission method and device based on demodulated reference signal

Technical field

The present invention relates to multiple-input and multiple-output (MIMO, Multi-Input Multi-Output) transmission technology, relate in particular to a kind of open loop MIMO transmission method and device based on demodulated reference signal.

Background technology

The high-order multi-antenna technology is one of key technology of senior Long Term Evolution (LTE-A, Long Term Evolution Advanced) system, in order to improve system transmissions speed.Senior Long Term Evolution is also referred to as LTE-Advanced.

In order to realize introducing channel quality measurement and the data demodulates behind the high-order multi-antenna technology, two class frequency pilot signs have been defined respectively in the transmission of LTE-A system descending: demodulated reference signal (DMRS, Demodulation Reference Signal) and channel condition information reference symbol (CSI-RS, Channel State Information-Reference Signal), wherein, DMRS is used for the detection demodulation of Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel).CSI-RS is used for channel condition information (CSI, Channel State Information) measures, comprise channel quality indication (CQI, Channel Quality Indicator), pre-coding matrix indication (PMI, Precoding Matrix Indicator), the measurement of stratum's indication information such as (RI, Rank Indicator).Above-mentioned two class frequency pilot signs can be used for supporting such as multipoint cooperative (CoMP, Coordinated Multi-Point), spatial reuse etc.

At Long Term Evolution (LTE, Long Term Evolution) in the system, that adopt is common reference symbol (CRS, Common Reference Signal or Cell Specific Reference Signal), all users use common pilot to carry out the measurement of channel and the detection demodulation of Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel).When adopting this CRS, need transmitting terminal which kind of pretreatment mode of additionally having notified the data that receiving terminal launches, the expense of pilot tone is larger.In multi-user's multiple-input and multiple-output (MU-MIMO, Multi-User Multi-Input Multi-Output) system, because a plurality of terminal is used identical CRS, can't realize the quadrature of pilot tone in addition, therefore also just can't estimate well to disturb.

In the LTE-A system, in order to reduce the expense of pilot tone, CSI-RS and DMRS are designed respectively, because the DMRS pretreatment mode identical with the data according to the available order information of dispatched users respective channels, shines upon DMRS simultaneously.Therefore DMRS has following characteristics: (1) terminal is peculiar, such as DMRS corresponding to particular terminal and the identical precoding processing of the data of dispatched users; (2) only exist only in network side, as be positioned on the resource and layer that enhanced base station (eNB) dispatches for transfer of data; (3) from network side, the DMRS that transmits on the different layers is mutually orthogonal.Can find out that from These characteristics the expense based on DMRS can adjust pilot tone adaptively according to order information in the lower situation of order, can reduce the expense of pilot tone so greatly.

In LTE Release 8, the transmission mode of definition comprises 7 kinds, be respectively: single antenna port transmission, transmission diversity, long time delay cyclic delay diversity (CDD, Cyclic Delay Diversity) open loop MIMO, Closed-Loop Spatial Multiplexing, multiuser MIMO, based on closed-loop MIMO, the single current wave beam forming of individual layer transmission, these several transmission modes all are based on CRS and define.In the LTE-A system, in order further to improve the flexibility of MU-MIMO and the flexibility of precoding processing, transmission mode 8 (dual-stream beamforming) and transmission mode 9 (maximum 8 layers of transmission) have been introduced, wherein transmission mode 8 is based on DMRS and detects demodulation, carries out channel measurement based on CRS.9 of transmission modes mainly are based on DMRS and detect demodulation, carry out channel measurement based on CSI-RS.Because CSI-RS only is used for channel measurement, so transmission cycle is longer with respect to the transmission cycle of CRS, and DMRS can adjust expense flexibly according to the number of plies of transmission, therefore has larger advantage.

From present LTE R9, the R10 enhancing to multi-antenna technology, mainly be based on DMRS and CSI-RS the transmission means of closed loop is optimized, and abundant not enough for the transmission research of open loop MIMO; And from another point of view, the definition of current CSI-RS, DMRS and CRS exists overlapping in function.And from long-run development, exist larger advantage based on the open loop MIMO technology of DMRS and CSI-RS.

From the occupation mode of weights, at present in LTE R8, under the mode based on the open loop MIMO transmission of CRS, its form is shown below:

$\left[\begin{array}{c}{y}^{\left(0\right)}\left(i\right)\\ .\\ .\\ .\\ y^{(P-1)}\left(i\right)\end{array}\right]=W\left(i\right)D\left(i\right)U\left[\begin{array}{c}{x}^{\left(0\right)}\left(i\right)\\ .\\ \text{.}\\ .\\ x^{(\mathrm{\υ}-1)}\left(i\right)\end{array}\right]$

The effect of above-mentioned three matrix W, D, U is respectively: the D matrix is used for frequency domain and realizes Large delay CDD; The U matrix is actually a discrete Fourier transform (DFT) (DFT, Discrete Fourier Transform) matrix, and effect is to realize the layer exchange features between the different layers; The W matrix is the precoding mapping matrix.

Wherein the value of D and U is respectively:

Under 2 antennas and 4 antenna configurations, the precoding weights occupation mode of Large Delay CDD is:

During 2 antenna port: when only having a code word (codeword) when enabling (one layer), adopt the mode of diversity to transmit; When having two codeword to enable (2layer), the precoding weights are corresponding to the weights of index=O in 2 antenna codebooks.

During 4 antenna port: when only having a codeword to enable, if only have one deck, adopt the mode of SFBC (Space Frequency Block Code)+FSTD (Frequency Shift Time Diversity) to transmit; When corresponding two layers of cordword, perhaps when two codeword are arranged, adopt the open loop MIMO mode of Large Delay CDD.Corresponding precoding weights are 12,13,14,15 numbers this (set of code book weights and index mapping table are seen 3GPP TS 36.211) in 4 antenna codebooks.Recycling through the precoding weights on the data after the layer mapping, be specially W (i)=C _k,

C1, C2, C3, C4 are 12,13,14,15 numbers bases corresponding to above-mentioned index.

As seen, under traditional open loop MIMO transmission means, the code book quantity of open loop MIMO is very limited, and the weights that recycle fix, and therefore is difficult to adjust on the basis based on user's directional statistics feature.

Under above-mentioned background, be necessary further to study based on the open loop MIMO transmission technology under the new pilot tone to adapt to the transmission demand of different scenes.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of open loop MIMO transmission method and device based on demodulated reference signal, can make the pilot design in the LTE-A system be applicable to the open loop MIMO transmission.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of open loop MIMO transmission method based on demodulated reference signal comprises:

The rule of utilizing the first weights and setting according to receiving-transmitting sides is mapped to demodulated reference signal DMRS port with the data to be transmitted of each layer, utilize the second weights that the DMRS port data is mapped to channel condition information reference symbol CSI-RS port or physical antenna, and transmission.

Preferably, described method also comprises:

The rule of setting according to receiving-transmitting sides and transmit the DMRS port number that employed number of layers determines that described data to be transmitted is shone upon.

Preferably, described the second weights are transparent to the recipient.

Preferably, described method also comprises:

Broad-band channel statistical information by recipient feedback or when long the code book of channel statistical information determine described the second weights;

When described recipient does not carry out the precoding information feedback, dispose voluntarily described the second weights by described transmit leg.

Preferably, described the second weights are identical in same PRB or frequency band;

Described the second weights are identical or different in different PRB or frequency band.

Preferably, when number of layers was 1, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_m\end{array}\right]$ Or $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right];$ Wherein, the pre-coding matrix of described the second weights is $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ The time, at different time slots, transmit based on different DMRS ports respectively, wherein v _mWith v _{M '}Equal or unequal;

When number of layers was 2, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ Perhaps $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}\end{array}\right];$

When number of layers was 3, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right];$

When number of layers was 4, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& -v_m& 0& -v_{m^{\′}}\end{array}\right];$

Wherein, v _m, v _{M '}, v _{M "}Expression and m, m ' and m " corresponding vector parameters; v _k=[1e ^{J2 π k/K}... .e ^{J2q π k/K}] ^T, wherein k is the positive integer greater than 2, q represents CSI-RS port number, [] ^TThe computing of expression transposition.

Preferably, described the second weights change based on the subframe numbers that carries data to be transmitted.

Preferably, described the second weights are changed to based on the subframe numbers that carries data to be transmitted: Wherein, n _sExpression time slot sequence number,

Expression subframe sequence number; n _RBsExpression Physical Resource Block sequence number or band number, the rule function that f (x, y) expression changes based on x, y, it is known that f (x, y) is configured to receiving-transmitting sides.

Preferably, the described rule of utilizing the first weights and setting according to receiving-transmitting sides is mapped to the DMRS port with the data to be transmitted of each layer and is:

To different [x ⁽⁰⁾(i) ... x ^(v-1)(i)] ^TVector adopts the first different weights pre-coding matrixes; [x wherein ⁽⁰⁾(i) ... x ^(v-1)(i)] T represents through i data vector after the layer mapping, the number of layers when v represents transfer of data.

Preferably, when number of layers was 1, described the first weights pre-coding matrix was

Or

Wherein working as described the first weights pre-coding matrix is

The time, at different time slots, transmit based on different DMRS ports respectively, wherein

With

Equal or unequal;

When number of layers was 2, described the first weights pre-coding matrix was

Or

When number of layers was 3, described the first weights pre-coding matrix was

Or

Or

Wherein

N is the positive integer more than or equal to 2; The value of the n that i data vector of n (i) expression is corresponding.

Preferably, described n (i) ∈ { 0,1,2,3} or n (i) ∈ { 0,1}.

Preferably, the corresponding relation of described the first weights and i data vector is:

When number of layers is 1 or 2,

When number of layers is 3 or 4,

Preferably, before the rule of utilizing and setting according to receiving-transmitting sides was mapped to the DMRS port with the data to be transmitted of each layer, described method also comprised:

Utilize successively orthogonal matrix U and diagonal matrix D to data vector [x ⁽⁰⁾(i) ... x ^(v-1)(i)] ^TProcess; Wherein U and D are the matrix of v * v.

Preferably, the pass between the number of layers v when described DMRS port number p and transfer of data is:

P=2v; Or p=4v; Or p=v.

Preferably, described method also comprises:

When the CSI-RS port number was 2 or 4, described the second weights were unit matrix; The first weights are the precoding weights that Long Term Evolution LTE R8 defines in transmission mode 3; The DMRS port number equals the CRS port number that defines among the LTE R8.

A kind of open loop MIMO transmitting device based on demodulated reference signal comprises map unit and transmission unit, wherein:

Map unit is used for utilizing the first weights and the rule set according to receiving-transmitting sides is mapped to the DMRS port with the data to be transmitted of each layer, utilizes the second weights that the DMRS port data is mapped to channel condition information reference symbol CSI-RS port or physical antenna;

Transmission unit is used for the data of transmission CSI-RS port or the data of physical antenna.

Preferably, described device also comprises:

The first determining unit is used for the rule of setting according to receiving-transmitting sides and transmits the DMRS port number that employed number of layers determines that described data to be transmitted is shone upon.

Preferably, described device also comprises:

The second determining unit, be used for by the recipient feed back the broad-band channel statistical information or when long the code book of channel statistical information determine described the second weights.

Preferably, described device also comprises:

Dispensing unit is used for disposing voluntarily described the second weights by described transmit leg when described recipient does not carry out the precoding information feedback.

Preferably, when number of layers was 1, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_m\end{array}\right]$ Or $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right];$ Wherein, the pre-coding matrix of described the second weights is $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ The time, at different time slots, transmit based on different DMRS ports respectively, wherein v _mWith v _{M '}Equal or unequal;

When number of layers was 2, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ Perhaps $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}\end{array}\right];$

When number of layers was 3, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right];$

When number of layers was 4, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& -v_m& 0& -v_{m^{\′}}\end{array}\right];$

Wherein, v _m, v _{M '}, v _{M "}Expression and m, m ' and m " corresponding vector parameters; v _k=[1e ^{J2 π k/K}... .e ^{J2q π k/K}] ^T, wherein k is the positive integer greater than 2, q represents CSI-RS port number, [] ^TThe computing of expression transposition.

Preferably, when number of layers was 1, described the first weights pre-coding matrix was

Or

Wherein working as described the first weights pre-coding matrix is

The time, at different time slots, transmit based on different DMRS ports respectively, wherein

With Equal or unequal;

When number of layers was 2, described the first weights pre-coding matrix was

Or

When number of layers was 3, described the first weights pre-coding matrix was

Or Or

Wherein

N is the positive integer more than or equal to 2; The value of the n that i data vector of n (i) expression is corresponding.

Preferably, the corresponding relation of described the first weights and i data vector is:

When number of layers is 1 or 2,

When number of layers is 3 or 4,

Among the present invention, utilize the first weights and according to the rule that receiving-transmitting sides is set the data to be transmitted of each layer is shone upon demodulated reference signal DMRS port, utilize the second weights that the DMRS port data is mapped to channel condition information reference symbol CSI-RS port or physical antenna, like this, on the basis that does not change the DMRS pattern, the different PDSCH data vectors through layer mapping are adopted different precoding weights.Thereby avoided under the conventional transmission pattern of current LTE-A system based on DMRS, same PRB must adopt the restriction of identical precoding weights, thereby obtains larger diversity gain.The present invention takes full advantage of that directional information becomes slowly in the communication system, the fast feature that becomes of phase information on the different polarised directions.And on different PRB or frequency band, can adopt the second different weights to realize the DMRS port to the mapping of CSI-RS port, thereby further improve diversity.

Description of drawings

Fig. 1 is the open loop MIMO transmission map schematic diagram based on demodulated reference signal of the present invention;

Fig. 2 is the composition structural representation that the present invention is based on the open loop MIMO transmitting device of demodulated reference signal.

Embodiment

Basic thought of the present invention is: utilize the first weights and the rule set according to receiving-transmitting sides is mapped to the DMRS port with the data to be transmitted of each layer, utilize the second weights that the DMRS port data is mapped to channel condition information reference symbol CSI-RS port or physical antenna, and transmission.

Wherein, the rule of setting according to receiving-transmitting sides and transmit employed number of layers and calculate the DMRS port number that described data to be transmitted is shone upon.

Wherein, described the second weights are transparent to the recipient.Here, the second weights refer to the recipient is transparent, and the recipient can carry out reception ﹠ disposal need not to know in the situation of the second weights.

The code book of channel statistical information is determined described the second weights when wherein, feeding back broad-band channel statistical information or length by the recipient;

When described recipient does not carry out the precoding information feedback, dispose voluntarily described the second weights by described transmit leg.

Wherein, described the second weights are identical in Same Physical Resource Block PRB or frequency band;

Described the second weights are identical or different in different PRB or frequency band.

When number of layers was 1, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_m\end{array}\right]$ Or $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right];$ Wherein, the pre-coding matrix of described the second weights is $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ The time, at different time slots, transmit based on different DMRS ports respectively, wherein v _mWith v _{M '}Equal or unequal;

When number of layers was 2, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ Perhaps $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}\end{array}\right];$

When number of layers was 3, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right];$

When number of layers was 4, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& -v_m& 0& -v_{m^{\′}}\end{array}\right];$

Wherein, v _m, v _{M '}, v _{M "}Expression and m, m ' and m " corresponding vector parameters; v _m=[1e ^{J2 π m/K}... .e ^{J2q π m/K}] ^T, wherein k is the positive integer greater than 2, q represents CSI-RS port number, [] ^TThe computing of expression transposition.Need to prove v _mAbove-mentioned account form be equally applicable to v _{M '}, v _{M "}Calculating.

Described the second weights change based on the subframe numbers that carries data to be transmitted, are specially:

Wherein, n _sExpression time slot sequence number,

Expression subframe sequence number; n _RBsExpression Physical Resource Block sequence number or band number, the rule function that f (x, y) expression changes based on x, y, it is known that f (x, y) is configured to receiving-transmitting sides.

Wherein, to different [x ⁽⁰⁾(i) ... x ^(v-1)(i)] ^TVector adopts the first different weights pre-coding matrixes; [x wherein ⁽⁰⁾(i) ... x ^(v-1)(i)] ^TI data vector after expression is shone upon through layer, the number of layers when v represents transfer of data.

When number of layers was 1, described the first weights pre-coding matrix was Or

Wherein working as described the first weights pre-coding matrix is

The time, at different time slots, transmit based on different DMRS ports respectively, wherein With

Equal or unequal;

When number of layers was 2, described the first weights pre-coding matrix was Or

When number of layers was 3, described the first weights pre-coding matrix was

Or Or

Wherein N is the positive integer more than or equal to 2; The value of the n that i data vector of n (i) expression is corresponding.

N (i) ∈ { 0,1,2,3} or n (i) ∈ { 0,1}.The corresponding relation of the first weights and i data vector is:

When number of layers is 1 or 2,

When number of layers is 3 or 4,

Based on aforesaid way, represent the first weights and the second weights with W and Λ respectively, then data are to be implemented to the mapping of demodulated reference signal port with the second weights at the concrete form that corresponding ports transmits:

C(i)＝W(i)X(i)

I data vector X (i) after wherein X (i) shines upon through layer=[x ⁽⁰⁾(i) ... x ^(v-1)(i)] ^T, v represents to transmit employed number of layers, and C (i) is for being mapped to the data behind the demodulated reference signal port, C (i)=[c ⁽⁰⁾(i) ... c ^(p-1)(i)] ^T, p represents to transmit employed demodulated reference signal port number, and W (i) is that p * v ties up matrix.Further, then can be implemented to by the first weights Λ the mapping of measuring reference signals port: Y (i)=Λ (m) C (i) is n wherein _RBsExpression Resource Block sequence number,

Expression subframe sequence number,

Before the data to be transmitted mapping DMRS port of the rule of utilizing and setting according to receiving-transmitting sides with each layer, can also utilize successively orthogonal matrix U and diagonal matrix D to data vector [x ⁽⁰⁾(i) ... x ^(v-1)(i)] ^TProcess; Wherein U and D are the matrix of v * v.This moment C (i)=W (i) D (i) UX (i).

Pass between number of layers v when DMRS port number p and transfer of data is:

P=2v; Or p=4v; Or p=v.

When the CSI-RS port number was 2 or 4, described the second weights were unit matrix; The first weights are the precoding weights that Long Term Evolution LTE R8 defines in transmission mode 3; The DMRS port number equals the CSI-RS port number that defines among the LTE R8.

For making purpose of the present invention, technical scheme and advantage are clearer, and by the following examples and with reference to accompanying drawing, the present invention is described in more detail.

Fig. 1 is the open loop MIMO transmission map schematic diagram based on demodulated reference signal of the present invention, and as shown in Figure 1, the open loop MIMO transmission map mode based on demodulated reference signal of the present invention mainly is to i data vector [x after shining upon through layer ⁽⁰⁾(i) ... x ^(v-1)(i)] ^TCarry out respectively the mapping of the first weights and the second weights, namely utilize the first weights to carry out data vector to the mapping of DMRS port, and utilize the second weights to carry out the DMRS port data to the mapping of CSI-RS port.

Among the present invention, the second weights have reflected the directional information of recipient with respect to transmit leg, and the first weights have reflected that then different poliarizing antennas are with respect to the phase property of directional information.Wherein said the second weights are transparent to the recipient, and receiving-transmitting sides only need to define the service regeulations of the first weights.

Among the present invention, the second weights can be based on broadband pre-coding matrix indication (the wideband PMI of UE, wideband Precoding Matix Indication) or statistics PMI adjust, and for the situation of different layers, adjust in different ways respectively.

Below further describe the collocation method of pre-coding matrix of the present invention (weights) by concrete example.

Embodiment one

Precoding weights using method when this example relates to the lower open loop MIMO transmission of 8 antenna polarizations configuration.

Definition

For convenience, suppose that here the antenna port number equals to measure the antenna port number.

When number of layers is that first kind of way is that the form that disposes the second weights is for the moment $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_m\end{array}\right],$ The form that disposes simultaneously the first weights is

After the second weights were processed, 8 antenna terminal mapping became 2 demodulated reference signal ports; In carrying out mapping process, in identical physical resources piece (PRB, Physical Resource Block) or frequency band, the second weighted vector remains unchanged, and namely m remains unchanged, in different PRB or frequency band, transmit leg can adopt different m according to sending strategy or scheduling strategy.When there being precoding indication information when feedback, the second weights can also based on the reflection broadband of recipient's feedback or when long channel characteristics pre-coding matrix and obtain.And the first weighted vector is to be the Physical Downlink Shared Channel (PDSCH after realizing shining upon through layer, Physical Downlink Share Channel) data-mapping arranges to demodulation reference channel port, in order to obtain the open loop MIMO transmission gain, according to

Determine that the first weights are corresponding

This moment n (i) ∈ { 0,1,2,3}.This moment, precoded signal was expressed as: Further, also can introduce long time delay CDD matrix D and a layer switching matrix U among the LTE R8, then based on the precoded signal of demodulated reference signal port $\left[\begin{array}{c}{y}^{\left(0\right)}\left(i\right)\\ y^{\left(1\right)}\left(i\right)\end{array}\right]=W\left(i\right)D\left(i\right)U\left[x^{\left(0\right)}\left(i\right)\right].$ Need to prove under this mode, the second weights also can for $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_{m^{\′}}\end{array}\right]$ Form.The invention is not restricted to use orthogonal matrix U and diagonal matrix D that precoded signal is processed, can also use other matrixes to process.

When rank was 1, the second way was that with antenna terminal mapping to 4 a demodulated reference signal port, the form that dispose the second weights this moment is by the second weights $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ Perhaps $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}\end{array}\right],$ Can at different time-gap select different DMRS port carry out based on the precoding of DMRS port this moment, for example supposes 4 DMRS port correspondences 7,8,9,10, at first time slot, carries out the precoding of PDSCH based on port 7,8; And second time slot carries out precoding based on port 9,10.This moment, the transmission of PDSCH was equivalent to based on different directional weighting v in a PRB or frequency band so _mTransmit, thereby further increased diversity.The expense that this mode is actually with DMRS exchanges larger diversity gain for.Two layers of weights that adopt when carrying out precoding based on the DMRS port are identical with aforementioned first kind of way.

When number of layers was 2, the form that disposes the second weights was $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ Perhaps $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}\end{array}\right],$ The form that disposes simultaneously the first weights is

Or After the second weights were processed, 8 antenna terminal mapping became 4 demodulated reference signal ports; This moment the variation characteristic of the second weights and the first weights variation characteristic and number of layers for first kind of way is identical for the moment.This moment, precoded signal was expressed as:

Further, also can introduce long time delay CDD matrix D and a layer switching matrix U among the LTE R8, then based on the precoded signal of demodulated reference signal port $\left[\begin{array}{c}{y}^{\left(0\right)}\left(i\right)\\ y^{\left(1\right)}\left(i\right)\\ y^{\left(2\right)}\left(i\right)\\ y^{\left(3\right)}\left(i\right)\end{array}\right]=W\left(i\right)D\left(i\right)U\left[\begin{array}{c}{x}^{\left(0\right)}\left(i\right)\\ x^{\left(1\right)}\left(i\right)\end{array}\right].$

When number of layers was 3, the form that disposes the second weights was one of following form:

$\left(a\right)\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}\end{array}\right]$

$\left(b\right)\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right]$

$\left(c\right)\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right].$

Simultaneously according to one of following form configuration the first weights:

After the second weights were processed, 8 antenna terminal mapping became 6 demodulated reference signal ports; Wherein the variation characteristic of the second weights and number of layers are that 1 o'clock first kind of way is identical.In order to obtain the open loop MIMO transmission gain, be used for realizing and be mapped to demodulation reference channel port the first weights through the PDSCH (physical downlink share channel) after the layer mapping

The variation characteristic of middle n (i) is

This moment n (i) ∈ { 0,1}.This moment, precoded signal was expressed as:

Further, also can introduce long time delay CDD matrix D and a layer switching matrix U among the LTE R8, then based on the precoded signal of demodulated reference signal port $\left[\begin{array}{c}{y}^{\left(0\right)}\left(i\right)\\ y^{\left(1\right)}\left(i\right)\\ y^{\left(2\right)}\left(i\right)\\ y^{\left(3\right)}\left(i\right)\\ y^{\left(4\right)}\left(i\right)\\ y^{\left(5\right)}\left(i\right)\end{array}\right]=W\left(i\right)D\left(i\right)U\left[\begin{array}{c}{x}^{\left(0\right)}\left(i\right)\\ x^{\left(1\right)}\left(i\right)\\ x^{\left(2\right)}\left(i\right)\end{array}\right].$ Need to prove, the invention is not restricted to use orthogonal matrix U and diagonal matrix D that precoded signal is processed, can also use other matrixes to process.

When number of layers was 4, the form that disposes the second weights was one of following form:

$\left(a\right)\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}\end{array}\right]$

$\left(b\right)\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& -v_m& 0& -v_{m^{\′}}\end{array}\right]$

Simultaneously according to one of following form configuration the first weights:

Wherein the variation characteristic of the second weights and number of layers are that 1 o'clock the mode of the first is identical.In order to obtain the open loop MIMO transmission gain, be used for realizing and be mapped to demodulation reference channel port the first weights through the PDSCH after the layer mapping

The variation characteristic of middle n (i) and number of layers are that 3 o'clock mode is identical.This moment, precoded signal was expressed as:

Further, also can introduce long time delay CDD matrix D and a layer switching matrix U among the LTE R8, then based on the precoded signal of demodulated reference signal port $\left[\begin{array}{c}{y}^{\left(0\right)}\left(i\right)\\ y^{\left(1\right)}\left(i\right)\\ y^{\left(2\right)}\left(i\right)\\ y^{\left(3\right)}\left(i\right)\\ y^{\left(4\right)}\left(i\right)\\ y^{\left(5\right)}\left(i\right)\\ y^{\left(6\right)}\left(i\right)\\ y^{\left(7\right)}\left(i\right)\end{array}\right]=W\left(i\right)D\left(i\right)U\left[\begin{array}{c}{x}^{\left(0\right)}\left(i\right)\\ x^{\left(1\right)}\left(i\right)\\ x^{\left(2\right)}\left(i\right)\\ x^{\left(3\right)}\left(i\right)\end{array}\right].$ The invention is not restricted to use orthogonal matrix U and diagonal matrix D that precoded signal is processed, can also use other matrixes to process.

In these cases, the second weights can also further change according to the subframe sequence number, be used for to determine the first weights this moment Wherein, n _sExpression time slot sequence number,

Expression subframe sequence number; n _RBsExpression Physical Resource Block sequence number or band number, the rule function that f (x, y) expression changes based on x, y, this rule function receiving-transmitting sides is known.

Embodiment two

Originally be exemplified as the precoding weights using method when open loop MIMO transmits under 2,4 antenna configurations.

In this embodiment, configuration for 2,4 antennas, respectively that demodulated reference signal (DMRS) port is corresponding one by one with public reference signal (CRS) port, be that the port 7+i of demodulated reference signal is corresponding to the port i of public reference signal (CRS), also be equivalent to unit matrix and realize the mapping of public reference signal (CRS) port and demodulated reference signal port, this moment, the second weights were with unit matrix.When not disposing public reference signal (CRS) in the system, directly carry out the transmission of open loop MIMO based on demodulated reference signal, this moment, the second weights were equivalent to demodulated reference signal (DMRS) port of realization equal number and the mapping of measuring reference signals (CSI-RS) port.

Under this mode, the occupation mode of the first weights and identical for occupation mode and the variation characteristic of code book in the transmission mode 3 among the Changing Pattern of different pieces of information vector and the LTE R8.

Fig. 2 is the composition structural representation that the present invention is based on the open loop MIMO transmitting device of demodulated reference signal, and as shown in Figure 2, the open loop MIMO transmitting device that the present invention is based on demodulated reference signal comprises map unit 20 and transmission unit 21, wherein:

Map unit 20 is used for utilizing the first weights and the rule set according to receiving-transmitting sides is mapped to the DMRS port with the data to be transmitted of each layer, utilizes the second weights that the DMRS port data is mapped to channel condition information reference symbol CSI-RS port or physical antenna;

Transmission unit 21 is used for the data of transmission CSI-RS port or the data of physical antenna.Among the present invention, transmission unit is the digital signal transmission systems such as antenna.

On the basis of device shown in Figure 2, the open loop MIMO transmitting device that the present invention is based on demodulated reference signal also comprises:

The first determining unit (not shown among Fig. 2) is used for the rule of setting according to receiving-transmitting sides and transmits the DMRS port number that employed number of layers determines that described data to be transmitted is shone upon.

On the basis of device shown in Figure 2, the open loop MIMO transmitting device that the present invention is based on demodulated reference signal also comprises:

The second determining unit (not shown among Fig. 2), be used for by the recipient feed back the broad-band channel statistical information or when long the code book of channel statistical information determine described the second weights.

On the basis of device shown in Figure 2, the open loop MIMO transmitting device that the present invention is based on demodulated reference signal also comprises:

Dispensing unit (not shown among Fig. 2) is used for disposing voluntarily described the second weights by described transmit leg when described recipient does not carry out the precoding information feedback.

When number of layers was 1, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_m\end{array}\right]$ Or $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right];$ Wherein, the pre-coding matrix of described the second weights is $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ The time, at different time slots, transmit based on different DMRS ports respectively, wherein v _mWith v _{M '}Equal or unequal;

When number of layers was 2, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ Perhaps $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}\end{array}\right];$

When number of layers was 3, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right];$

When number of layers was 4, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& -v_m& 0& -v_{m^{\′}}\end{array}\right];$

Wherein, v _m, v _{M '}, v _{M "}Expression and m, m ' and m " corresponding vector parameters; v _m=[1e ^{J2 π m/K}... .e ^{J2q π m/K}] ^T, wherein k is the positive integer greater than 2, and q represents the CSI-RS port number, and [] T represents the transposition computing.Need to prove v _mAbove-mentioned account form be equally applicable to v _{M '}, v _{M "}Calculating.。

When number of layers was 1, described the first weights pre-coding matrix was

Or

Wherein working as described the first weights pre-coding matrix is

The time, at different time slots, transmit based on different DMRS ports respectively, wherein

With

Equal or unequal;

When number of layers was 2, described the first weights pre-coding matrix was

Or

When number of layers was 3, described the first weights pre-coding matrix was

Or

Or

Wherein

N is the positive integer more than or equal to 2; The value of the n that i data vector of n (i) expression is corresponding.

Wherein, the corresponding relation of the first weights and i data vector is:

When number of layers is 1 or 2,

When number of layers is 3 or 4,

It will be appreciated by those skilled in the art that practical function based on the each processing unit in the open loop MIMO transmitting device of demodulated reference signal shown in Figure 2 can be with reference to the associated description of aforementioned open loop MIMO transmission method based on demodulated reference signal and understand.Function based on each unit in the open loop MIMO transmitting device of demodulated reference signal shown in Figure 2 can realize by the program that runs on the processor, also can realize by concrete logical circuit.

The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.

Claims (22)

1. open loop MIMO transmission method based on demodulated reference signal is characterized in that described method comprises:

The rule of utilizing the first weights and setting according to receiving-transmitting sides is mapped to demodulated reference signal DMRS port with the data to be transmitted of each layer, utilize the second weights that the DMRS port data is mapped to channel condition information reference symbol CSI-RS port or physical antenna, and transmission.

2. method according to claim 1 is characterized in that, described method also comprises:

The rule of setting according to receiving-transmitting sides and transmit the DMRS port number that employed number of layers determines that described data to be transmitted is shone upon.

3. method according to claim 1 and 2 is characterized in that, described the second weights are transparent to the recipient.

4. method according to claim 1 and 2 is characterized in that, described method also comprises:

Broad-band channel statistical information by recipient feedback or when long the code book of channel statistical information determine described the second weights;

When described recipient does not carry out the precoding information feedback, dispose voluntarily described the second weights by described transmit leg.

5. method according to claim 1 and 2 is characterized in that, described the second weights are identical in Same Physical Resource Block PRB or frequency band;

Described the second weights are identical or different in different PRB or frequency band.

6. each described method in 5 according to claim 1 is characterized in that,

When number of layers was 1, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_m\end{array}\right]$ Or $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right];$ Wherein, the pre-coding matrix of described the second weights is $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ The time, at different time slots, transmit based on different DMRS ports respectively, wherein v _mWith v _{M '}Equal or unequal;

When number of layers was 2, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ Perhaps $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}\end{array}\right];$

When number of layers was 3, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right];$

When number of layers was 4, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& -v_m& 0& -v_{m^{\′}}\end{array}\right];$

Wherein, v _m, v _{M '}, v _{M "}Expression and m, m ' and m " corresponding vector parameters; v _k=[1e ^{J2 π k/K}... .e ^{J2q π k/K}] ^T, wherein k is the positive integer greater than 2, q represents CSI-RS port number, [] ^TThe computing of expression transposition.

7. method according to claim 6 is characterized in that, described the second weights change based on the subframe numbers that carries data to be transmitted.

8. method according to claim 7 is characterized in that, described the second weights are changed to based on the subframe numbers that carries data to be transmitted:

Wherein, n _sExpression time slot sequence number,

Expression subframe sequence number; n _RBsExpression Physical Resource Block sequence number or band number, the rule function that f (x, y) expression changes based on x, y, it is known that f (x, y) is configured to receiving-transmitting sides.

9. method according to claim 1 is characterized in that, the described rule of utilizing the first weights and setting according to receiving-transmitting sides is mapped to the DMRS port with the data to be transmitted of each layer and is:

To different [x ⁽⁰⁾(i) ... x ^(v-1)(i)] ^TVector adopts the first different weights pre-coding matrixes; [x wherein ⁽⁰⁾(i) ... x ^(v-1)(i)] ^TI data vector after expression is shone upon through layer, the number of layers when v represents transfer of data.

10. according to claim 1 or 9 described methods, it is characterized in that,

When number of layers was 1, described the first weights pre-coding matrix was

Or

Wherein working as described the first weights pre-coding matrix is The time, at different time slots, transmit based on different DMRS ports respectively, wherein

With

Equal or unequal;

When number of layers was 2, described the first weights pre-coding matrix was

Or

When number of layers was 3, described the first weights pre-coding matrix was

Or

Or

Wherein

N is the positive integer more than or equal to 2; The value of the n that i data vector of n (i) expression is corresponding.

11. method according to claim 10 is characterized in that, described n (i) ∈ { 0,1,2,3} or n (i) ∈ { 0,1}.

12. method according to claim 10 is characterized in that, the corresponding relation of described the first weights and i data vector is:

When number of layers is 1 or 2,

When number of layers is 3 or 4,

13. method according to claim 10 is characterized in that, before the rule of utilizing and setting according to receiving-transmitting sides was mapped to the DMRS port with the data to be transmitted of each layer, described method also comprised:

Utilize successively orthogonal matrix U and diagonal matrix D to data vector [x ⁽⁰⁾(i) ... x ^(v-1)(i)] ^TProcess; Wherein U and D are the matrix of v * v.

14. each described method in 13 according to claim 1 is characterized in that the pass between the number of layers v when described DMRS port number p and transfer of data is:

P=2v; Or p=4v; Or p=v.

15. method according to claim 14 is characterized in that, described method also comprises:

When the CSI-RS port number was 2 or 4, described the second weights were unit matrix; The first weights are the precoding weights that Long Term Evolution LTE R8 defines in transmission mode 3; The DMRS port number equals the CRS port number that defines among the LTE R8.

16. the open loop MIMO transmitting device based on demodulated reference signal is characterized in that described device comprises map unit and transmission unit, wherein:

Map unit is used for utilizing the first weights and the rule set according to receiving-transmitting sides is mapped to the DMRS port with the data to be transmitted of each layer, utilizes the second weights that the DMRS port data is mapped to channel condition information reference symbol CSI-RS port or physical antenna;

Transmission unit is used for the data of transmission CSI-RS port or the data of physical antenna.

17. device according to claim 16 is characterized in that, described device also comprises:

The first determining unit is used for the rule of setting according to receiving-transmitting sides and transmits the DMRS port number that employed number of layers determines that described data to be transmitted is shone upon.

18. according to claim 16 or 17 described devices, it is characterized in that described device also comprises:

The second determining unit, be used for by the recipient feed back the broad-band channel statistical information or when long the code book of channel statistical information determine described the second weights.

19. according to claim 16 or 17 described devices, it is characterized in that described device also comprises:

Dispensing unit is used for disposing voluntarily described the second weights by described transmit leg when described recipient does not carry out the precoding information feedback.

20. each described device in 19 is characterized in that according to claim 16,

When number of layers was 1, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_m\end{array}\right]$ Or $\left[\begin{array}{cc}{v}_m& 0\\ 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right];$ Wherein, the pre-coding matrix of described the second weights is $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ The time, at different time slots, transmit based on different DMRS ports respectively, wherein v _mWith v _{M '}Equal or unequal;

When number of layers was 2, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}\end{array}\right]$ Perhaps $\left[\begin{array}{cccc}{v}_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}\end{array}\right];$

When number of layers was 3, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& -v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccc}{v}_m& 0& v_{m^{\′}}& 0& v_{m^{\′\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& {-v}_{m^{\′\′}}\end{array}\right];$

When number of layers was 4, the pre-coding matrix of described the second weights was: $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}\end{array}\right]$ Or $\left[\begin{array}{cccccccc}{v}_m& 0& v_{m^{\′}}& 0& v_m& 0& v_{m^{\′}}& 0\\ 0& v_m& 0& v_{m^{\′}}& 0& -v_m& 0& -v_{m^{\′}}\end{array}\right];$

Wherein, v _m, v _{M '}, v _{M "}Expression and m, m ' and m " corresponding vector parameters; v _k=[1e ^{J2 π k/K}... .e ^{J2q π k/K}] ^T, wherein k is the positive integer greater than 2, q represents CSI-RS port number, [] ^TThe computing of expression transposition.

21. according to claim 16 or 17 described devices, it is characterized in that,

When number of layers was 1, described the first weights pre-coding matrix was Or

Wherein working as described the first weights pre-coding matrix is

The time, at different time slots, transmit based on different DMRS ports respectively, wherein

With

Equal or unequal;

When number of layers was 2, described the first weights pre-coding matrix was

Or

When number of layers was 3, described the first weights pre-coding matrix was

Or

Or

Wherein N is the positive integer more than or equal to 2; The value of the n that i data vector of n (i) expression is corresponding.

22. device according to claim 21 is characterized in that, the corresponding relation of described the first weights and i data vector is:

When number of layers is 1 or 2,

When number of layers is 3 or 4,

Images