CN111342868A

CN111342868A - Large-scale MIMO transmission method and device

Info

Publication number: CN111342868A
Application number: CN202010130350.5A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2016-06-22
Filing date: 2016-06-22
Publication date: 2020-06-26
Anticipated expiration: 2036-06-22
Also published as: CN107528616A; CN107528616B; CN111342868B

Abstract

The invention provides a large-scale MIMO transmission method and device. The UE firstly receives K1 first-type wireless signals; then K2 second-type wireless signals are received; and finally, transmitting the third wireless signal. Wherein the first type of wireless signal comprises at least one of { synchronization signal, broadcast signal, one first type of RS resource }, and the second type of wireless signal comprises L second type of RS resources. The third radio signal is used to determine T second type RS resources in the target second type radio signal. The K2 second-type wireless signals are respectively in one-to-one correspondence with the K2 first-type wireless signals. The K2 first type wireless signals are among the K1 first type wireless signals. The invention improves the gain of beam forming, reduces signaling redundancy and improves transmission efficiency.

Description

Large-scale MIMO transmission method and device

The present application is a divisional application of the following original applications:

application date of the original application: 2016, 06 and 22 months

- -application number of the original application: 201610458339.5

The invention of the original application is named: large-scale MIMO transmission method and device

Technical Field

The invention relates to a method and a device for multi-antenna transmission in the technical field of mobile communication, in particular to a scheme for wireless communication in a scene that network side equipment deploys a large number of antennas.

Background

Large scale (Massive) MIMO has become a research hotspot for next generation mobile communications. In large-scale MIMO, the transmission power of a single antenna is generally low, so that coverage of broadcast signals is a problem to be solved.

A Beam Sweeping (Beam Sweeping) scheme is proposed in a #74bis conference of 3GPP (3rd Generation Partner Project) RAN (radio access Network, Working Group) WG (Working Group) 1, that is, a base station transmits a broadcast signal for multiple times in a TDM (time Division Multiplexing) manner, and transmits a Beam for different directions each time.

Disclosure of Invention

The inventor finds through research that if the Beam is too narrow, the Beam Sweeping scheme will increase redundancy (Overhead) to a greater extent; if the beam is too wide, the reception performance of the UE may be affected. Therefore, how to balance between redundancy and performance is a problem to be solved. Further, when the base station does not obtain accurate CSI (Channel Status Information) of the downlink Channel, how to ensure the reception performance of the UE (User Equipment) side for the unicast signal also needs a further solution.

The present invention discloses a solution to the above problems. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE (User Equipment) of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.

The invention discloses a method used in UE of multi-antenna transmission, wherein the method comprises the following steps:

-step a. receiving K1 first type wireless signals;

-step b. receiving K2 second type radio signals;

-step c.

Wherein the first type of wireless signal comprises at least one of { synchronization signal, broadcast signal, one first type of RS resource }, and the second type of wireless signal comprises L second type of RS resources. The third radio signal is used to determine T second type RS resources in the target second type radio signal. The K2 second-type wireless signals are respectively in one-to-one correspondence with the K2 first-type wireless signals. The K2 first type wireless signals are among the K1 first type wireless signals. The target second type of wireless signal is one of the K2 second type of wireless signals. The K1 is a positive integer greater than 1, the K2 is a positive integer no greater than the K1, the L is a positive integer greater than 1, and the T is a positive integer no greater than the L. The first type of RS resources comprise Q1 RS ports, the second type of RS resources comprise Q2 RS ports, the Q1 is a positive integer, and the Q2 is a positive integer.

For one embodiment, any two of the K1 first-type wireless signals are QCLs (Quasi Co-Located).

As an embodiment, two wireless signals are the QCL refer to: the large-scale characteristics of a channel carrying one radio signal can be inferred from the large-scale characteristics (properties) of a channel carrying another radio signal. The large scale characteristics include one or more of { delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (Doppler shift), average gain (average gain), average delay (average delay) }.

As an embodiment, any two of the K2 second-type wireless signals occupy the same time-frequency resource in a time unit. As one example, the duration of the time unit is 1 millisecond. As one embodiment, the time unit has a duration of less than 1 millisecond.

As an embodiment, the K1 first-type wireless signals are transmitted by the same serving cell.

As an embodiment, the K1 first-type wireless signals are transmitted on the same carrier.

As an embodiment, the time-frequency resources occupied by any two first-type wireless signals in the K1 first-type wireless signals are non-overlapping.

As one embodiment, the K2 is 1, and the K2 second type wireless signals are the target second type wireless signals.

As an example, Q2 is 1.

As an example, T is 1.

As one example, Q2 is 1 and T is greater than 1.

As one embodiment, the Q1 is not equal to the Q2.

As an embodiment, the UE assumes that the target first type of wireless signal and the target second type of wireless signal employ the same Analog Beamforming (Beamforming) vector.

As an embodiment, the UE assumes that the analog beamforming employed by the first type of wireless signal and the corresponding second type of wireless signal have the same beam direction and width.

As an embodiment, the UE assumes that the Digital (Digital) beamforming employed by the T second-type RS resources in the second-type wireless signal respectively correspond to T beam directions.

As an embodiment, the UE assumes that any one of the K2 second type wireless signals and any one of the K1 first type wireless signals is a QCL.

In the above four embodiments, the first type of wireless signals and the corresponding second type of wireless signals are associated with each other and correspond to analog beamforming in the same direction, which has the following advantages:

the first type of wireless signal and the corresponding second type of wireless signal can be transmitted on the same time resource, thereby improving transmission efficiency;

reducing the signaling redundancy for configuring the second type of radio signals;

the second type of wireless signal can correspond to a narrower beam than the first type of wireless signal, increasing the gain of beamforming;

the terminal can obtain the channel characteristics by using the first type of wireless signals, thereby improving the receiving performance of the second type of wireless signals.

As one embodiment, the first type of wireless signal includes a broadcast signal, the target second type of wireless signal is used to determine a target channel parameter, and the target channel parameter is used to receive the broadcast signal in the target first type of wireless signal. As one embodiment, the target channel parameter includes a large scale characteristic.

In the above embodiment, the target second type wireless signal can be used to improve the performance of channel estimation of the corresponding broadcast signal.

As one embodiment, the third wireless signal includes a signature sequence including at least one of { Zadoff-Chu sequence, pseudorandom sequence }, the signature sequence being one of M candidate sequences. { time domain resources occupied by the third radio signal, frequency domain resources occupied by the third radio signal, indices of the signature sequences in the M candidate sequences }, at least one of which is used to determine the target second type radio signal.

As one embodiment, the third wireless signal includes a signature sequence including at least one of { Zadoff-Chu sequence, pseudorandom sequence }, the signature sequence being one of M candidate sequences. { time domain resources occupied by the third radio signal, frequency domain resources occupied by the third radio signal, indices of the signature sequences in the M candidate sequences }, at least one of which is used to determine the target second type radio signal and T second type RS resources therein.

As an embodiment, the third radio signal is used by a base station to determine the target first type radio signal, and the third radio signal is used to determine the T RS resources.

As an embodiment, the third radio signal includes a target index indicating the target first type radio signal and T indexes respectively indicating the T RS resources. As a sub-embodiment of this embodiment, the time domain resources occupied by the target index and the time domain resources occupied by the T indexes are discontinuous.

As an embodiment, the time domain resource occupied by the third wireless signal is discontinuous.

In one embodiment, the synchronization signal includes at least one of a { Zadoff-Chu sequence, a pseudo-random sequence }.

As one embodiment, the Synchronization Signal includes at least one of { PSS (Primary Synchronization Signal), SSS (Secondary Synchronization Signal) }.

As one embodiment, the synchronization Signal includes at least one of { NB (Narrow Band) -PSS (primary synchronization Signal) }.

As one embodiment, the broadcast signal is used to determine a system time. As an example, the System time is SFN (System Frame Number).

As an embodiment, the broadcast signal is transmitted on a PBCH (Physical Broadcasting CHannel).

As one embodiment, the broadcast signal includes { MIB (Master Information Block), SIB (System Information Block) }.

As one embodiment, the broadcast signal is transmitted on an NB-PBCH (for NB-IoT terminals).

As an embodiment, at least one of { time domain resources occupied by the target first type radio signal, frequency domain resources occupied by the target first type radio signal } is used for determining time domain resources occupied by the target second type radio signal.

As an embodiment, at least one of { time domain resources occupied by the target first type radio signal, frequency domain resources occupied by the target first type radio signal } is used for determining time-frequency resources occupied by the target second type radio signal.

As an embodiment, the K1 first type wireless signals are respectively used by the UE to determine K1 channel qualities, the target first type wireless signal is used to determine a target channel quality, the target channel quality is the maximum of the K1 channel qualities.

As an embodiment, the L second-type RS resources in the target second-type wireless signal are respectively used by the UE to determine L channel qualities, and the T second-type RS resources in the target second-type wireless signal are respectively used to determine T channel qualities, where the T channel qualities are the largest T of the L channel qualities.

As an embodiment, the channel Quality includes at least one of { RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality) }.

As one embodiment, the RS ports are periodically present.

As an embodiment, a pattern (pattern) of the RS port in a time-frequency Resource corresponding to a PRBP (Physical Resource Block Pair) is a pattern of a CSI-RS port in a PRBP.

As an embodiment, the frequency domain resources occupied by the RS ports in the first type of RS resources are narrowband.

As an embodiment, the frequency domain resources occupied by the RS ports in the second type of RS resources are wideband.

Specifically, according to one aspect of the present invention, the method further comprises the following steps:

-step d. receiving a fourth wireless signal, said fourth wireless signal being transmitted by T1 antenna ports.

Wherein T1 first vectors are respectively used for antenna virtualization of the T1 antenna ports. The third wireless signal is used to determine the T1 first vectors. The T1 is a positive integer.

As an embodiment, the third wireless signal is used to determine the T1 first vectors means: the beam directions (i.e., beamforming vectors) corresponding to the T second-type RS resources in the target second-type wireless signal are used to determine the T1 first vectors.

In the above embodiment, the UE can obtain only a wider beam according to the first type of wireless signals, and the second type of wireless signals correspond to a narrower beam. The base station can determine a narrower transmission beam for the fourth wireless signal by receiving the third wireless signal, thereby improving the receiving performance of the fourth wireless signal.

As an embodiment, one of the antenna ports is formed by antenna virtualization (antenna virtualization) by a plurality of antennas, and a corresponding antenna virtualization vector is a first vector. That is, the downlink signals transmitted by the multiple antennas are multiplied by the elements in one of the first vectors and then overlapped on the same time-frequency resource (superimposed to).

As an embodiment, the fourth wireless signal includes T1 RS ports, and the T1 RS ports are respectively transmitted by the T1 Antenna ports (Antenna ports).

As an embodiment, the T1 is greater than 1, and the fourth wireless signal is transmitted by the T1 antenna ports in a transmit diversity manner. As an embodiment, the transmit diversity is SFBC (Space Frequency Block Coding). As an embodiment, the transmit diversity is STBC (Space Time Block Coding).

As one example, the T1 is greater than the T.

As one example, the T1 is equal to the L.

As one example, the T1 is a positive integer power of 2.

As an embodiment, at least two of the T1 first vectors are not identical.

As an embodiment, at least two of the T1 first vectors are identical.

As an embodiment, any two first vectors of the T1 first vectors are not the same.

As an example, T is 1.

As an example, Q2 is 1.

As an embodiment, the fourth wireless signal includes an RAR (Random Access Response).

As one embodiment, the fourth wireless signal includes physical layer control signaling for scheduling the RAR. As an embodiment, the physical layer control signaling for scheduling the RAR is identified by an RA-RNTI.

As an embodiment, one of the first vectors is an inner product (Kroneckerproduct) of a second vector and a third vector, and the T1 first vectors correspond to the same third vector. As one example, the second vector corresponds to digital beamforming and the third vector corresponds to analog beamforming.

As an embodiment, the fourth wireless signal includes at least one of { physical layer control signaling, physical layer data }. As an embodiment, the physical layer control signaling is DCI (downlink control Information) for a downlink Grant (Grant).

As one embodiment, the physical layer data includes sib (system information).

In one embodiment, the transport channel corresponding to the physical layer data is bch (broadcast).

As an embodiment, the Physical layer data is transmitted on a PDSCH (Physical Downlink shared channel).

As an embodiment, the fourth radio signal may be simultaneously received by a plurality of terminals, the UE being one of the plurality of terminals.

As an embodiment, the fourth radio signal is cell specific.

Specifically, according to an aspect of the present invention, the step B further includes the steps of:

step B0. determines a fourth vector from the target first type of wireless signal.

Wherein the fourth vector is used to determine at least one of { receive beamforming for the target second type of wireless signal, receive beamforming for the fourth wireless signal }.

In the above aspect, the UE is equipped with multiple antennas.

As an embodiment, the multiple antennas of the UE implement MRC (Maximum Ratio Combining) on the target first type radio signals by the fourth vector.

The above embodiment can effectively improve the receiving performance of the target second-type wireless signal and the fourth wireless signal.

As one embodiment, the fourth vector is employed for receive beamforming of the target second type of wireless signal.

As one embodiment, Analog receive beamforming for the target second type of wireless signal employs the fourth vector.

As one embodiment, Analog receive beamforming for the fourth wireless signal employs the fourth vector.

As an embodiment, the RS ports in the target second type of radio signal correspond to the same analog beamforming vector.

As an embodiment, all RS ports in the second type of radio signal correspond to the same analog beamforming vector.

Specifically, according to an aspect of the present invention, the time domain resources occupied by the first type of wireless signals are used to determine the time domain resources occupied by the corresponding second type of wireless signals.

The above aspect reduces signaling redundancy for configuring the second type of wireless signal.

As an embodiment, the time domain resource occupied by the target second type of wireless signal is associated with the time domain resource occupied by the target first type of wireless signal.

In particular, according to one aspect of the invention, said first type of radio signal is used for determining said L.

As one embodiment, the first type of wireless signal includes the broadcast signal, the broadcast signal indicating the L.

As an embodiment, the first type of wireless signal includes the broadcast signal, and a scrambling code sequence corresponding to the broadcast signal is associated with the L. As a sub-embodiment, the UE determines a scrambling code sequence corresponding to the broadcast signal by a blind detection method, and further determines the L.

Specifically, according to one aspect of the present invention, the synchronization signals in the K1 first-type wireless signals include the same synchronization sequence, and the synchronization sequence includes at least one of { Zadoff-Chu sequence, pseudo-random sequence }.

The invention discloses a method used in a base station of multi-antenna transmission, which comprises the following steps:

-step a. transmitting K1 first type radio signals;

-step b. transmitting K2 second type radio signals;

-step c.

-step d. transmitting a fourth wireless signal, said fourth wireless signal being transmitted by T1 antenna ports.

Specifically, according to an aspect of the present invention, the step D further includes the steps of:

-step D0. determining the T1 first vectors from the T2 target signals.

Wherein the T2 target signals are transmitted by T2 terminals, respectively, the transmitter of the third wireless signal is one of the T2 terminals, and the third wireless signal is one of the T2 target signals. The T2 is a positive integer. One of the target signals is used to determine T second type RS resources in one second type radio signal.

The invention discloses user equipment used for multi-antenna transmission, which comprises the following modules:

a first receiving module: used for receiving K1 first-type wireless signals;

a second receiving module: used for receiving K2 second type wireless signals;

a first sending module: for transmitting a third wireless signal.

As an embodiment, the user equipment is characterized by further comprising:

a third receiving module: for receiving a fourth wireless signal, which is transmitted by T1 antenna ports.

As an embodiment, the user equipment is characterized in that the second receiving module is further configured to: and determining a fourth vector according to the target first-class wireless signal. Wherein the fourth vector is used to determine at least one of { receive beamforming for the target second type of wireless signal, receive beamforming for the fourth wireless signal }.

As an embodiment, the user equipment is characterized in that the time domain resource occupied by the first type of radio signal is used to determine the time domain resource occupied by the corresponding second type of radio signal.

As an embodiment, the above user equipment is characterized in that the first type radio signal is used for determining the L.

As an embodiment, the above user equipment is characterized in that the synchronization signals of the K1 first-type wireless signals include the same synchronization sequence, and the synchronization sequence includes at least one of { Zadoff-Chu sequence, pseudo-random sequence }.

The invention discloses a base station device used for multi-antenna transmission, which comprises the following modules:

a second sending module: used for receiving K1 first-type wireless signals;

a third sending module: used for receiving K2 second type wireless signals;

a fourth receiving module: for transmitting a third wireless signal.

As an embodiment, the base station apparatus is characterized by further comprising:

a fourth sending module: for transmitting a fourth wireless signal, which is transmitted by T1 antenna ports.

Compared with the traditional scheme, the invention has the following advantages:

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 shows a flow diagram of wireless transmission according to an embodiment of the invention;

fig. 2 shows a schematic diagram of an antenna structure according to an embodiment of the invention;

fig. 3 is a diagram illustrating resource mapping of RS ports in first and second types of radio signals according to an embodiment of the present invention;

fig. 4 shows a schematic diagram of a resource mapping for a second type of radio signal according to an embodiment of the invention;

fig. 5 shows a schematic diagram of a resource mapping of a first type of radio signal and a second type of radio signal according to an embodiment of the invention;

fig. 6 shows a block diagram of a processing device used in a UE according to an embodiment of the invention;

fig. 7 shows a block diagram of a processing device for use in a base station according to an embodiment of the invention;

Detailed Description

The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a flow chart of wireless transmission, as shown in fig. 1. In fig. 1, base station N1 is the serving cell maintenance base station for UE U2. In fig. 1, the steps in block F1, block F2, and block F3, respectively, are optional.

For N1, K1 first type wireless signals are transmitted in step S101; transmitting K2 second-type wireless signals in step S102; receiving a third wireless signal in step S103; the T1 first vectors are determined in step S11 from T2 target signals, the T2 target signals being transmitted by T2 terminals, respectively, the UE U2 being one of the T2 terminals, the third wireless signal being one of the T2 target signals. Said T2 is a positive integer, one said target signal is used to determine T second type RS resources in one second type radio signal; a fourth wireless signal is transmitted in step S12.

For U2, K1 first-type wireless signals are received in step S201; determining a fourth vector from the target first type of wireless signal in step S21, wherein the fourth vector is used by the UE U2 to determine at least one of { receive beamforming for the target second type of wireless signal, receive beamforming for the fourth wireless signal }; receiving K2 second-type wireless signals in step S202; transmitting a third wireless signal in step S203; the fourth wireless signal is received in step S22.

In embodiment 1, the first type of radio signal includes at least one of { synchronization signal, broadcast signal, one first type RS resource }, and the second type of radio signal includes L second type RS resources. The third radio signal is used by the base station N1 to determine T second type RS resources in the target second type radio signal. The K2 second-type wireless signals are respectively in one-to-one correspondence with the K2 first-type wireless signals. The K2 first type wireless signals are among the K1 first type wireless signals. The target second type of wireless signal is one of the K2 second type of wireless signals. The K1 is a positive integer greater than 1, the K2 is a positive integer no greater than the K1, the L is a positive integer greater than 1, and the T is a positive integer no greater than the L. The first type of RS resources comprise Q1 RS ports, the second type of RS resources comprise Q2 RS ports, the Q1 is a positive integer, and the Q2 is a positive integer. The T1 first vectors are used for antenna virtualization of the T1 antenna ports, respectively. The fourth wireless signal is transmitted by T1 antenna ports, and the third wireless signal is used by base station N1 to determine the T1 first vectors. The T1 is a positive integer.

As sub-embodiment 1 of embodiment 1, the third radio signal includes first information indicating the target first type radio signal from among the K1 first type radio signals, and second information indicating T second type RS resources from among the L second type RS resources. As an embodiment, the second information includes L information bits, and only T bits of the L information bits are 1, and the T bits respectively indicate the T second-type RS resources.

As sub-embodiment 2 of embodiment 1, the Q2 is 1, that is, the RS resource of the second type consists of one RS port.

As sub-example 3 of example 1, the T is 1.

As sub-embodiment 4 of embodiment 1, one of the second type radio signals is transmitted in one TS (Time Slot). For the K1 second-class radio signals, the Time-frequency resources occupied by the L second-class RS resources in a TS (Time Slot) are the same.

As sub-embodiment 5 of embodiment 1, the Q2 is 1, the T is 1, and the digital beamforming vector corresponding to the T RS resources of the second type in the target wireless signal of the second type is one of the T1 first vectors.

As sub-embodiment 6 of embodiment 1, the analog beamforming vector corresponding to the fourth wireless signal is the analog beamforming vector corresponding to the target first wireless signal.

Example 2

Embodiment 2 illustrates a schematic diagram of an antenna structure, as shown in fig. 2. In fig. 2, a communication node is equipped with G antenna groups, and the G antenna groups respectively correspond to G Radio Frequency (RF) chains. One antenna group comprises V antennas, G is a positive integer, and V is a positive integer. For G ≦ 1 ≦ G, the antenna within antenna group # G includes { Ant G _1, Ant G _2, …, Ant G _ V } in FIG. 2, which { Ant G _1, Ant G _2, …, Ant G _ V } passes through beamforming vector [ a_g,1a_g,2… a_g,V]Analog beamforming is performed.

As sub-embodiment 1 of embodiment 2, the communication node is a base station, x in figure 2₁,...x_QIs a useful signal to be transmitted, which is transmitted after digital beamforming and analog beamforming. The baseband processor is used for the x₁,...x_QPerforming digital beamforming of [ a ]_g,1a_g,2… a_g,V]Is used to perform analog beamforming on the output of the baseband processor. For the first type of wireless signals and the corresponding second type of wireless signals in the present invention, the [ a ] is_g,1a_g,2… a_g,V]The analog beamforming vector of the communication node comprises G × V elements, wherein the (G-1) · V + V th element is a_g,v。

As an embodiment of sub-embodiment 1 of embodiment 2, one of the second type radio signals includes Q RS ports, and modulation symbols of the Q RS ports are respectively the x₁,...x_QSaid Q is equal to the product of said L and said Q2. The modulation symbols of the Q RS ports are obtained after passing through a baseband processor:

wherein

Is a beamforming matrix of G rows and Q columns, diag (x)₁x₂… x_Q) Representing the diagonal element as x₁,…x_QThe diagonal matrix of (a) is,

column q of (1)

Is x_qDigital beamforming vectors for the corresponding RS ports/antenna ports, Q being from 1 to Q. As an embodiment, the K2 second-type wireless signals in the invention use the same digital beamforming matrix, i.e. share the same

As an embodiment of sub-embodiment 1 of embodiment 2, one wireless signal of the first type is transmitted by Q antenna ports, and modulation symbols transmitted by the Q antenna ports are the x₁,…x_QAnd Q is a positive integer. Said x₁,…x_QAfter passing through a baseband processor, the following results are obtained:

wherein

Is a beam forming matrix of G rows and Q columns]^TThe transpose of the matrix is represented,

column q of (1)

Is directed to transmitting x_qQ is from 1 to Q. As an example, in the present inventionThe K1 first-type wireless signals adopt the same digital beam forming matrix, namely share the same

As an embodiment of sub-embodiment 1 of embodiment 2, a given antenna port is implemented by all antennas { Ant1_1, Ant1_2, …, Ant1_ V, Ant2_1, Ant2_2, …, Ant2_ V, … …, Ant _1, Ant _2, …, Ant _ V } of the communication node by way of antenna virtualization, the corresponding beamforming vector comprising G × V elements, wherein the (G-1) · V + V element is w_g·a_g,vWherein w is_gIs the element of the digital beamforming vector (associated with the given port) corresponding to antenna group # G, G is greater than or equal to 1 and less than or equal to G, and V is greater than or equal to 1 and less than or equal to V.

As a sub-embodiment 2 of embodiment 2, the communication node is a UE, x in figure 2₁,…x_QIs the received useful signal. Said [ a ]_g,1a_g,2… a_g,V]Is used for analog beamforming to receive at least one of the target second type wireless signal in the invention and the fourth wireless signal in the invention, and the received wireless signal is processed by a baseband processor to obtain the x₁,…x_Q。

As a sub-embodiment of sub-embodiment 2 of embodiment 2, the communication node determines the [ a ] according to MRC of the target first type radio signal in the present invention_g,1a_g,2… a_g,V]。

As a sub-embodiment of sub-embodiment 2 of embodiment 2, the baseband processor comprises a MIMO receiver.

As a sub-embodiment of sub-embodiment 2 of embodiment 2, for the target first type wireless signal and the corresponding fourth wireless signal in the present invention, the [ a ] is_g,1a_g,2… a_g,V]Are the same.

As a sub-example of sub-example 2 of example 2, the [ a ] is_g,1a_g,2… a_g,V]Does not vary with g.

As a sub-example of sub-example 2 of example 2, the fourth vector in the present invention includes G × V elements, where the (G-1). V + V th element is a_g,v，1≤g≤G，1≤v≤V。

Sub-example 3, a as example 2_g,vThe modulus is 1, G is more than or equal to 1 and less than or equal to G, and V is more than or equal to 1 and less than or equal to V.

As a sub-embodiment 4 of embodiment 2, all antenna ports for transmitting one wireless signal of the first type respectively correspond to the same analog beamforming vector, namely [ a_g,1a_g,2… a_g,V]Does not vary with g.

As a sub-embodiment 5 of embodiment 2, the communication node is a UE and for a given time instant, [ a ]_g,1a_g,2… a_g,V]Does not vary with g.

As sub-embodiment 6 of embodiment 2, the communication node is a UE and G is 1.

Example 3

Embodiment 3 illustrates a schematic diagram of resource mapping of RS ports in a first type of wireless signals and a second type of wireless signals, as shown in fig. 3. In fig. 3, oblique lines identify time-frequency resources occupied by first-type radio signals in I OFDM symbols, cross lines identify time-frequency resources occupied by I RS ports in second-type radio signals in I OFDM symbols, and I is a positive integer.

As sub-embodiment 1 of embodiment 3, any one RU (Resource Unit) in the I OFDM symbols is occupied by one of { the first type radio signal, the second type radio signal }. The RU occupies the bandwidth of one subcarrier in the frequency domain and the duration of one OFDM symbol in the time domain.

As sub-embodiment 2 of embodiment 3, the I OFDM symbols can be occupied by only one radio signal of the first type, and the I OFDM symbols can be occupied by only one radio signal of the second type.

As a sub-embodiment 3 of the embodiment 3, the time domain resource occupied by the first type of radio signal is greater than the duration of the I OFDM symbols.

As a sub-embodiment 4 of embodiment 3, the time domain resource occupied by the second type of radio signal is greater than the duration of the I OFDM symbols.

As sub-example 5 of example 3, the I is 1.

As a sub-embodiment 6 of embodiment 3, I is greater than 1, and each of the I RS ports is mapped onto I RUs by an OCC (Orthogonal Covering Code), the I RS ports sharing the same I RUs. As a sub-embodiment, I is 2.

As sub-example 7 of example 3, I is a fixed constant.

Example 4

Embodiment 4 illustrates a schematic diagram of resource mapping of a second type of wireless signal, as shown in fig. 4. In fig. 4, a square filled with a number Y (Y is from 1 to Y) represents time-frequency resources occupied by the RS port group # Y in the I OFDM symbols, a bold frame represents time-frequency resources occupied by the second type of wireless signals in the I OFDM symbols, and one RS port group includes I RS ports. One occurrence of one RS port group in the frequency domain occupies one subcarrier and in the time domain occupies I OFDM symbols.

As sub-example 1 of example 4, the I is 1.

As sub-embodiment 2 of embodiment 4, I is greater than 1, and each of the I RS ports is mapped onto I RUs through the OCC, the I RS ports sharing the same I RUs.

As sub-embodiment 3 of embodiment 4, the product of I and Y is equal to the product of said L and said Q2 in the present invention.

As a sub-embodiment 4 of the embodiment 4, the I OFDM symbols can also be used to carry a first type of radio signal.

As sub-embodiment 5 of embodiment 4, the RS port groups occur at equal intervals in the frequency domain.

As a sub-embodiment 6 of embodiment 4, the RS port group is wideband (i.e. the system bandwidth is divided into a positive integer number of frequency domain units, one RS port group appears on all frequency domain units within the system bandwidth, and the bandwidth corresponding to the frequency domain unit is equal to the difference of the frequencies of the subcarriers appearing two times adjacently to one RS port).

Example 5

Embodiment 5 illustrates a schematic diagram of resource mapping of a first type of wireless signal and a second type of wireless signal, as shown in fig. 5. In fig. 5, one TU (Time Unit) includes K1 TSs (Time slots), and TUs are identified by bold frames. The K1 TSs are respectively used for carrying K1 first-type radio signals { #1, #2, # …, # K1}, and the K1 TSs are respectively used for carrying K1 second-type radio signals { #1, #2, # …, # K1 }. The first type radio signals { #1, #2, …, # K1} correspond to the second type radio signals { #1, #2, …, # K1} one to one.

As sub-embodiment 1 of embodiment 5, the first type of wireless signals are narrowband and the second type of wireless signals are wideband.

As sub-embodiment 2 of embodiment 5, the UE determines, according to the time domain resource occupied by the first type of wireless signal, the corresponding time domain resource occupied by the second type of wireless signal.

As sub-embodiment 3 of embodiment 5, the UE determines, according to the frequency domain resource occupied by the first type of radio signal, the corresponding frequency domain resource occupied by the second type of radio signal.

As sub-embodiment 4 of embodiment 5, the K2 second-type wireless signals in the present invention belong to the K1 second-type wireless signals. The sub-embodiment enables the UE to select the K2 second-class wireless signals from the K1 second-class wireless signals according to the K2 first-class wireless signals with better receiving quality, and reduces the complexity of the UE.

As a sub-embodiment 5 of the embodiment 5, the K1 first-type wireless signals are transmitted periodically, where the transmission period is (P-1) TUs, and P is a positive integer greater than 1. As an example, P is fixed. As an embodiment, a broadcast signal in the first type of wireless signal is used to determine the P.

Example 6

Embodiment 6 is a block diagram of a processing apparatus used in a UE, as shown in fig. 6. In fig. 6, the UE apparatus 200 mainly includes a first receiving module 201, a second receiving module 202, a first sending module 203 and a third receiving module 204. Wherein the third receiving module 204 is optional.

The first receiving module 201 is configured to receive K1 first-type wireless signals; the second receiving module 202 is configured to receive K2 second-type wireless signals; the first sending module 203 is configured to send a third wireless signal; a fourth wireless signal is received, the fourth wireless signal being transmitted by the T1 antenna ports.

In embodiment 6, the first type of radio signal includes { synchronization signal, broadcast signal, one first type of RS resource }, and the second type of radio signal includes L second type of RS resources. The third radio signal is used to determine T second type RS resources in the target second type radio signal. The K2 second-type wireless signals are respectively in one-to-one correspondence with the K2 first-type wireless signals. The K2 first type wireless signals are among the K1 first type wireless signals. The target second type of wireless signal is one of the K2 second type of wireless signals. The K1 is a positive integer greater than 1, the K2 is a positive integer no greater than the K1, the L is a positive integer greater than 1, and the T is a positive integer no greater than the L. The first type of RS resources comprise Q1 RS ports, the second type of RS resources comprise Q2 RS ports, the Q1 is a positive integer, and the Q2 is a positive integer. The T1 first vectors are used for antenna virtualization of the T1 antenna ports, respectively. The third wireless signal is used to determine the T1 first vectors. The T1 is a positive integer.

As sub-example 1 of example 6, the T1 is 1.

As sub-embodiment 2 of embodiment 6, the UE determines the Q1 by blind detection.

Example 7

Embodiment 7 is a block diagram of a processing apparatus used in a base station, as shown in fig. 7. In fig. 7, the base station apparatus 300 mainly includes a second transmitting module 301, a third transmitting module 302, a fourth receiving module 303, and a fourth transmitting module 304. Wherein the fourth sending module 304 is optional.

The second sending module 301 is configured to receive K1 first-type wireless signals; the third sending module 302 is configured to receive K2 second-type wireless signals; the fourth receiving module 303 is configured to send a third wireless signal; the fourth sending module 304 is configured to send a fourth wireless signal, where the fourth wireless signal is sent by T1 antenna ports. .

In embodiment 7, the first type of radio signal includes { synchronization signal, broadcast signal, one first type of RS resource }, and the second type of radio signal includes L second type of RS resources. The third radio signal is used to determine T second type RS resources in the target second type radio signal. The K2 second-type wireless signals are respectively in one-to-one correspondence with the K2 first-type wireless signals. The K2 first type wireless signals are among the K1 first type wireless signals. The target second type of wireless signal is one of the K2 second type of wireless signals. The K1 is a positive integer greater than 1, the K2 is a positive integer no greater than the K1, the L is a positive integer greater than 1, and the T is a positive integer no greater than the L. The first type of RS resources comprise Q1 RS ports, the second type of RS resources comprise Q2 RS ports, the Q1 is a positive integer, and the Q2 is a positive integer. The T1 first vectors are used for antenna virtualization of the T1 antenna ports, respectively. The third wireless signal is used to determine the T1 first vectors. The T1 is a positive integer.

As sub-embodiment 1 of embodiment 7, the broadcast signal is used to determine at least one of { system time, the L }.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE in the invention comprises wireless communication equipment such as but not limited to a mobile phone, a tablet computer, a notebook computer, a network card, an NB-IOT terminal, an eMTC terminal and the like. The base station or system device in the present invention includes but is not limited to a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method in a UE used for multi-antenna transmission, comprising the steps of:

-step a. receiving K1 first type wireless signals;

-step b. receiving a second type of radio signal;

-step c. transmitting a third radio signal;

the first type of wireless signals comprise broadcast signals, and the second type of wireless signals comprise L second type RS resources; the third radio signal is used for determining 1 RS resource of a second type in the second type radio signals; the second type wireless signal corresponds to one first type wireless signal in the K1 first type wireless signals; k1 is a positive integer greater than 1, L is a positive integer greater than 1; the second type of RS resources comprise Q2 RS ports, wherein Q2 is a positive integer and the RS ports; the broadcast signal is used to determine a system time; the K1 first-type wireless signals are transmitted by the same serving cell; the K1 first-type wireless signals are transmitted on the same carrier wave; and time-frequency resources occupied by any two first-class wireless signals in the K1 first-class wireless signals are not overlapped.

2. The method in a UE for multi-antenna transmission according to claim 1, further comprising the steps of:

-step d. receiving a fourth wireless signal, said fourth wireless signal being transmitted by T1 antenna ports;

wherein T1 first vectors are respectively used for antenna virtualization of the T1 antenna ports; the third wireless signal is used to determine the T1 first vectors; the T1 is a positive integer.

3. The method in a UE for multi-antenna transmission according to claim 1, wherein said step B further comprises the steps of:

-step B0. determining a fourth vector from the target first type of radio signal;

wherein the fourth vector is used to determine at least one of receive beamforming for the target second type of wireless signal and receive beamforming for the fourth wireless signal, the target first type of wireless signal being the one first type of wireless signal corresponding to the second type of wireless signal.

4. A method in a base station used for multi-antenna transmission, comprising the steps of:

-step a. transmitting K1 first type radio signals;

-step b. transmitting a second type of radio signal;

-step c. receiving a third wireless signal;

5. The method in a base station used for multi-antenna transmission according to claim 4, further comprising the steps of:

-step d. transmitting a fourth wireless signal, said fourth wireless signal being transmitted by T1 antenna ports;

6. The method in a base station used for multi-antenna transmission according to claim 5, wherein said step D further comprises the steps of:

-step D0. determining the T1 first vectors from the T2 target signals;

wherein the T2 target signals are transmitted by T2 terminals, respectively, the transmitter of the third wireless signal is one of the T2 terminals, and the third wireless signal is one of the T2 target signals; the T2 is a positive integer; one of the target signals is used to determine T second type RS resources in one second type radio signal.

7. A user equipment for multi-antenna transmission, comprising the following modules:

a first receiving module: used for receiving K1 first-type wireless signals;

a second receiving module: for receiving a second type of wireless signal;

a first sending module: for transmitting a third wireless signal;

8. The user equipment used for multi-antenna transmission according to claim 7, further comprising:

a third receiving module: for receiving a fourth wireless signal, the fourth wireless signal being transmitted by T1 antenna ports;

9. The user equipment for multi-antenna transmission according to claim 7, wherein the second receiving module determines a fourth vector according to the target first type of radio signal; wherein the fourth vector is used to determine at least one of receive beamforming for the target second type of wireless signal and receive beamforming for the fourth wireless signal, the target first type of wireless signal being the one first type of wireless signal corresponding to the second type of wireless signal.

10. The user equipment used for multi-antenna transmission according to any of claims 7 to 9, wherein the first type of radio signals comprise synchronization signals, and wherein the synchronization signals of the K1 first type of radio signals comprise the same synchronization sequence, and wherein the synchronization sequence comprises at least one of Zadoff-Chu sequence and pseudo random sequence.

11. A base station device used for multi-antenna transmission, comprising the following modules:

a second sending module: used for receiving K1 first-type wireless signals;

a third sending module: for receiving a second type of wireless signal;

a fourth receiving module: for transmitting a third wireless signal;

12. The base station apparatus used for multi-antenna transmission according to claim 11, further comprising:

a fourth sending module: for transmitting a fourth wireless signal, the fourth wireless signal being transmitted by T1 antenna ports;