Operation of terminal for multi-antenna transmission
First Claim
1. A method of transmitting one or more demodulation reference signals (DMRSs) for a Physical Uplink Shared Channel (PUSCH) at a User Equipment (UE) configured with a transmission mode for multiple transmit antennas in a radio communication system, the method comprising:
- receiving Downlink Control Information (DCI) for scheduling of the PUSCH, wherein the DCI includes a 3-bit value related to Cyclic Shift (CS) for DMRS;
determining N CS parameters based on the 3-bit value and a number of layers, wherein N is equal to the number of layers;
determining N CS values α
λ
based on the N CS parameters by using the equation α
λ
=2π
·
nCS,λ
/12, wherein nCS,λ
is a λ
th CS parameter of the N CS parameters, λ
is and integer in a range from 0 to N−
1; and
generating N DMRS sequences based on the N CS values α
λ
by using the expression ej·
α
λ
·
n·
ru,v(n), wherein ru,v(n) is the base sequence, u is a group number, v is a base sequence number within a corresponding group, n is an integer in a range from 0 to NscRS−
1, and NscRS is a number of allocated subcarriers.
1 Assignment
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Accused Products
Abstract
Embodiments of the present invention relate to a method and an apparatus for enabling a terminal to transmit a signal in a wireless communication system. According to one embodiment, a signal transmission method includes: receiving configuration information for multi-antenna transmission from a base station; configuring a multi-antenna transmission mode in accordance with the received configuration information; and transmitting an uplink channel having a plurality of symbols to the base station through multiple antennas.
136 Citations
20 Claims
-
1. A method of transmitting one or more demodulation reference signals (DMRSs) for a Physical Uplink Shared Channel (PUSCH) at a User Equipment (UE) configured with a transmission mode for multiple transmit antennas in a radio communication system, the method comprising:
-
receiving Downlink Control Information (DCI) for scheduling of the PUSCH, wherein the DCI includes a 3-bit value related to Cyclic Shift (CS) for DMRS; determining N CS parameters based on the 3-bit value and a number of layers, wherein N is equal to the number of layers; determining N CS values α
λ
based on the N CS parameters by using the equation α
λ
=2π
·
nCS,λ
/12, wherein nCS,λ
is a λ
th CS parameter of the N CS parameters, λ
is and integer in a range from 0 to N−
1; andgenerating N DMRS sequences based on the N CS values α
λ
by using the expression ej·
α
λ
·
n·
r u,v(n), whereinr u,v(n) is the base sequence, u is a group number, v is a base sequence number within a corresponding group, n is an integer in a range from 0 to NscRS−
1, and NscRS is a number of allocated subcarriers. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of receiving one or more demodulation reference signals (DMRSs) for a Physical Uplink Shared Channel (PUSCH) from a User Equipment (UE) configured with a transmission mode for multiple transmit antennas at a Base Station (BS) in a radio communication system, the method comprising:
-
transmitting, to the UE, Downlink Control Information (DCI) for scheduling of the PUSCH, wherein the DCI includes a 3-bit value related to Cyclic Shift (CS) for DMRS; and receiving, from the UE, N DMRS sequences for the PUSCH, wherein the N DMRS sequences are defined based on N CS values α
λ
by using the expression ej·
α
λ
·
n·
r u,v(n), whereinr u,v(n) is the base sequence, u is a group number, v is a base sequence number within a corresponding group, n is an integer in a range from 0 to NscRS−
1, and NscRS is a number of allocated subcarriers,wherein the N CS values α
λ
are determined based on N CS parameters by using the equation α
λ
=2π
·
nCS,λ
/12, wherein nCS,λ
is a λ
th CS parameter of the N CS parameters, λ
is an integer in a range form 0 to N−
1, andwherein the N CS parameters are determined based on the 3-bit value and a number of layers, and N is equal to the number of layers. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A User Equipment (UE) for transmitting one or more demodulation reference signals (DMRSs) for a Physical Uplink Shared Channel (PUSCH) in a radio communication system, the UE being configured with a transmission mode for multiple transmit antennas and comprising:
-
a Radio Frequency (RF) unit; and a processor configured to; receive Downlink Control Information (DCI) for scheduling of the PUSCH, wherein the DCI includes a 3-bit value related to Cyclic Shift (CS) for DMRS; determine N CS parameters based on the 3-bit value and a number of layers, wherein N is equal to the number of layers; determine N CS values α
λ
based on the N CS parameters by using the equation α
λ
=2π
·
nCS,λ
/12, , wherein nCS,λ
is a λ
th CS parameter of the N CS parameters, λ
is an integer in a range from 0 to N—
1; andgenerate N DMRS sequences based on the N CS values α
λ
by using the expression ej·
α
λ
·
n ·
r u,v(n), whereinr u,v(n) is the base sequence, u is a group number, v is a base sequence number within a corresponding group, n is an integer in a range from 0 to NscRS−
1, and NscRS is a number of allocated subcarriers. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A Base Station (BS) for receiving one or more demodulation reference signals (DMRSs) for a Physical Uplink Shared Channel (PUSCH) from a User Equipment (UE) configured with a transmission mode for multiple transmit antennas in a radio communication system, the BS comprising:
-
a Radio Frequency (RF) unit; and a processor configured to; transmit, to the UE, Downlink Control Information (DCI) for scheduling of the PUSCH, wherein the DCI includes a 3-bit value related to Cyclic Shift (CS) for DMRS; and receive, from the UE, N DMRS sequences for the PUSCH, wherein the N DMRS sequences are defined based on N CS values α
λ
by using the expression ej·
α
·
λ
·
n·
r u,v(n), whereinr u,v(n), is the base sequence, u is a group number, v is a base sequence number within a corresponding group, n is an integer in a range from 0 to NscRS−
1, and NscRS is a number of allocated subcarriers,wherein the N CS values α
λ
are determined based on N CS parameters by using the equation α
λ
=2π
·
nCS,λ
/12, wherein nCS,λ
is a λ
th CS parameter of the N CS parameters, λ
is an integer in a range from 0 to N−
1, andwherein the N parameters are determined based on the 3-bit value and a number of layers, and N is equal to the number of layers. - View Dependent Claims (17, 18, 19, 20)
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Specification