IP Library › Granted Patent US 8,767,665

Granted Patent B2

US 8,767,665 · App. 13/967,582 · Granted Jul 1, 2014

Feed-forward control signaling and decoding schemes

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Quick Facts

Patent No.: US 8,767,665
App. No.: 13/967,582
Granted: Jul 1, 2014
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises transmitting an index indicating data stream parameters, and transmitting an indication of the number of transmit antennas at the base station, wherein the data stream parameters for 8 transmit antennas are indicated by the index according to a first table, and wherein the data stream parameters for 4 transmit antennas are indicated by the index according to a second table. Other methods, apparatuses, and systems also are disclosed.

Claims (734)

1. A method implemented in a base station used in a wireless communications system, the method comprising:

transmitting an index indicating data stream parameters in which a combination of a number of streams and an allocated pilot stream index is included; and

transmitting an indication of a number of transmit antennas at the base station,

wherein the data stream parameters for 8 transmit antennas are indicated by the index according to a first table in which the data stream parameters further include a modulation constellation of a paired user in a case of 2 stream transmission,

wherein the data stream parameters for 4 transmit antennas are indicated by the index according to a second table in which the data stream parameters further include a modulation constellation of a paired user, and

wherein the first table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index (PSI)

in a transmission with MU-MIMO, and the

modulation constellation of the paired user in the case

of 2 stream transmission

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 8 streams with PSI = stream0

0b10011: 8 streams with PSI = stream1

0b10100: 8 streams with PSI = stream2

0b10101: 8 streams with PSI = stream3

0b10110: 8 streams with PSI = stream4

0b10111: 8 streams with PSI = stream5

0b11000: 8 streams with PSI = stream6

0b11001: 8 streams with PSI = stream7

0b11010: 8 streams with PSI = stream0 and stream1

0b11011: 8 streams with PSI = stream2 and stream3

0b11100: 8 streams with PSI = stream4 and stream5

0b11101: 8 streams with PSI = stream6 and stream7

0b11110: reserved

0b11111: reserved

and the second table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index in a

transmission with MU-MIMO, and the modulation

constellation of the paired user

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 3 streams with PSI = stream2 and other

modulation = QPSK

0b10011: 3 streams with PSI = stream2 and other

modulation = 16QAM

0b10100: 3 streams with PSI = stream2 and other

modulation = 64QAM

0b10101: 3 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b10110: 3 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b10111: 3 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11000: 4 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b11001: 4 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b11010: 4 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11011: 4 streams with PSI = stream2 and stream3

and other modulation = QPSK

0b11100: 4 streams with PSI = stream2 and stream3

and other modulation = 16QAM

0b11101: 4 streams with PSI = stream2 and stream3

and other modulation = 64QAM

0b11110: reserved

0b11111: reserved

where MU-MIMO stands for multi-user multiple input multiple output, QPSK stands for quadrature phase-shift keying, and QAM stands for quadrature amplitude modulation.

2. The method as in claim 1 , further comprising:

transmitting a data signal in accordance with the data stream parameters.

3. A method implemented in a user equipment used in a wireless communications system, the method comprising:

receiving an index indicating data stream parameters in which a combination of a number of streams and an allocated pilot stream index is included; and

receiving an indication of a number of transmit antennas at a base station,

wherein the first table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index (PSI)

in a transmission with MU-MIMO, and the

modulation constellation of the paired user in the case

of 2 stream transmission

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 8 streams with PSI = stream0

0b10011: 8 streams with PSI = stream1

0b10100: 8 streams with PSI = stream2

0b10101: 8 streams with PSI = stream3

0b10110: 8 streams with PSI = stream4

0b10111: 8 streams with PSI = stream5

0b11000: 8 streams with PSI = stream6

0b11001: 8 streams with PSI = stream7

0b11010: 8 streams with PSI = stream0 and stream1

0b11011: 8 streams with PSI = stream2 and stream3

0b11100: 8 streams with PSI = stream4 and stream5

0b11101: 8 streams with PSI = stream6 and stream7

0b11110: reserved

0b11111: reserved

and the second table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index in a

transmission with MU-MIMO, and the modulation

constellation of the paired user

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 3 streams with PSI = stream2 and other

modulation = QPSK

0b10011: 3 streams with PSI = stream2 and other

modulation = 16QAM

0b10100: 3 streams with PSI = stream2 and other

modulation = 64QAM

0b10101: 3 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b10110: 3 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b10111: 3 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11000: 4 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b11001: 4 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b11010: 4 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11011: 4 streams with PSI = stream2 and stream3

and other modulation = QPSK

0b11100: 4 streams with PSI = stream2 and stream3

and other modulation = 16QAM

0b11101: 4 streams with PSI = stream2 and stream3

and other modulation = 64QAM

0b11110: reserved

0b11111: reserved

where MU-MIMO stands for multi-user multiple input multiple output, QPSK stands for quadrature phase-shift keying, and QAM stands for quadrature amplitude modulation.

4. The method as in claim 3 , further comprising:

receiving a data signal in accordance with the data stream parameters.

5. A base station used in a wireless communications system, the base station comprising:

a transmitter to transmit an index indicating data stream parameters in which a combination of a number of streams and an allocated pilot stream index is included, and an indication of a number of transmit antennas at the base station,

wherein the first table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index (PSI)

in a transmission with MU-MIMO, and the

modulation constellation of the paired user in the case

of 2 stream transmission

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 8 streams with PSI = stream0

0b10011: 8 streams with PSI = stream1

0b10100: 8 streams with PSI = stream2

0b10101: 8 streams with PSI = stream3

0b10110: 8 streams with PSI = stream4

0b10111: 8 streams with PSI = stream5

0b11000: 8 streams with PSI = stream6

0b11001: 8 streams with PSI = stream7

0b11010: 8 streams with PSI = stream0 and stream1

0b11011: 8 streams with PSI = stream2 and stream3

0b11100: 8 streams with PSI = stream4 and stream5

0b11101: 8 streams with PSI = stream6 and stream7

0b11110: reserved

0b11111: reserved

and the second table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index in a

transmission with MU-MIMO, and the modulation

constellation of the paired user

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 3 streams with PSI = stream2 and other

modulation = QPSK

0b10011: 3 streams with PSI = stream2 and other

modulation = 16QAM

0b10100: 3 streams with PSI = stream2 and other

modulation = 64QAM

0b10101: 3 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b10110: 3 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b10111: 3 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11000: 4 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b11001: 4 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b11010: 4 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11011: 4 streams with PSI = stream2 and stream3

and other modulation = QPSK

0b11100: 4 streams with PSI = stream2 and stream3

and other modulation = 16QAM

0b11101: 4 streams with PSI = stream2 and stream3

and other modulation = 64QAM

0b11110: reserved

0b11111: reserved

where MU-MIMO stands for multi-user multiple input multiple output, QPSK stands for quadrature phase-shift keying, and QAM stands for quadrature amplitude modulation.

6. The base station as in claim 5 , wherein the transmitter further transmits a data signal in accordance with the data stream parameters.

7. A user equipment used in a wireless communications system, the user equipment comprising:

a receiver to receive an index indicating data stream parameters in which a combination of a number of streams and an allocated pilot stream index is included, and an indication of a number of transmit antennas at a base station,

wherein the first table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index (PSI)

in a transmission with MU-MIMO, and the

modulation constellation of the paired user in the case

of 2 stream transmission

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 8 streams with PSI = stream0

0b10011: 8 streams with PSI = stream1

0b10100: 8 streams with PSI = stream2

0b10101: 8 streams with PSI = stream3

0b10110: 8 streams with PSI = stream4

0b10111: 8 streams with PSI = stream5

0b11000: 8 streams with PSI = stream6

0b11001: 8 streams with PSI = stream7

0b11010: 8 streams with PSI = stream0 and stream1

0b11011: 8 streams with PSI = stream2 and stream3

0b11100: 8 streams with PSI = stream4 and stream5

0b11101: 8 streams with PSI = stream6 and stream7

0b11110: reserved

0b11111: reserved

and the second table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index in a

transmission with MU-MIMO, and the modulation

constellation of the paired user

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 3 streams with PSI = stream2 and other

modulation = QPSK

0b10011: 3 streams with PSI = stream2 and other

modulation = 16QAM

0b10100: 3 streams with PSI = stream2 and other

modulation = 64QAM

0b10101: 3 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b10110: 3 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b10111: 3 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11000: 4 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b11001: 4 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b11010: 4 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11011: 4 streams with PSI = stream2 and stream3

and other modulation = QPSK

0b11100: 4 streams with PSI = stream2 and stream3

and other modulation = 16QAM

0b11101: 4 streams with PSI = stream2 and stream3

and other modulation = 64QAM

0b11110: reserved

0b11111: reserved

where MU-MIMO stands for multi-user multiple input multiple output, QPSK stands for quadrature phase-shift keying, and QAM stands for quadrature amplitude modulation.

8. The user equipment as in claim 7 ,

wherein the receiver further receives a data signal in accordance with the data stream parameters.

9. A method implemented in a wireless communications system, the method comprising:

transmitting, from a base station to a user equipment, an index indicating data stream parameters in which a combination of a number of streams and an allocated pilot stream index is included; and

transmitting, from the base station to the user equipment, an indication of a number of transmit antennas at the base station,

wherein the first table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index (PSI)

in a transmission with MU-MIMO, and the

modulation constellation of the paired user in the case

of 2 stream transmission

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 8 streams with PSI = stream0

0b10011: 8 streams with PSI = stream1

0b10100: 8 streams with PSI = stream2

0b10101: 8 streams with PSI = stream3

0b10110: 8 streams with PSI = stream4

0b10111: 8 streams with PSI = stream5

0b11000: 8 streams with PSI = stream6

0b11001: 8 streams with PSI = stream7

0b11010: 8 streams with PSI = stream0 and stream1

0b11011: 8 streams with PSI = stream2 and stream3

0b11100: 8 streams with PSI = stream4 and stream5

0b11101: 8 streams with PSI = stream6 and stream7

0b11110: reserved

0b11111: reserved

and the second table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index in a

transmission with MU-MIMO, and the modulation

constellation of the paired user

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 3 streams with PSI = stream2 and other

modulation = QPSK

0b10011: 3 streams with PSI = stream2 and other

modulation = 16QAM

0b10100: 3 streams with PSI = stream2 and other

modulation = 64QAM

0b10101: 3 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b10110: 3 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b10111: 3 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11000: 4 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b11001: 4 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b11010: 4 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11011: 4 streams with PSI = stream2 and stream3

and other modulation = QPSK

0b11100: 4 streams with PSI = stream2 and stream3

and other modulation = 16QAM

0b11101: 4 streams with PSI = stream2 and stream3

and other modulation = 64QAM

0b11110: reserved

0b11111: reserved

where MU-MIMO stands for multi-user multiple input multiple output, QPSK stands for quadrature phase-shift keying, and QAM stands for quadrature amplitude modulation.

10. The method as in claim 9 , further comprising:

transmitting, from the base station to the user equipment, a data signal in accordance with the data stream parameters.

11. A wireless communications system comprising:

a user equipment; and

a base station to transmit, to the user equipment, an index indicating data stream parameters in which a combination of a number of streams and an allocated pilot stream index is included, and an indication of a number of transmit antennas at the base station,

wherein the first table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index (PSI)

in a transmission with MU-MIMO, and the

modulation constellation of the paired user in the case

of 2 stream transmission

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 8 streams with PSI = stream0

0b10011: 8 streams with PSI = stream1

0b10100: 8 streams with PSI = stream2

0b10101: 8 streams with PSI = stream3

0b10110: 8 streams with PSI = stream4

0b10111: 8 streams with PSI = stream5

0b11000: 8 streams with PSI = stream6

0b11001: 8 streams with PSI = stream7

0b11010: 8 streams with PSI = stream0 and stream1

0b11011: 8 streams with PSI = stream2 and stream3

0b11100: 8 streams with PSI = stream4 and stream5

0b11101: 8 streams with PSI = stream6 and stream7

0b11110: reserved

0b11111: reserved

and the second table comprises

Size

Syntax

(bit)

Description/Notes

Index used to identify the combination of the number

of streams and the allocated pilot stream index in a

transmission with MU-MIMO, and the modulation

constellation of the paired user

0b00000: 2 streams with PSI = stream0 and other

modulation = QPSK

0b00001: 2 streams with PSI = stream0 and other

modulation = 16QAM

0b00010: 2 streams with PSI = stream0 and other

modulation = 64QAM

0b00011: 2 streams with PSI = stream0 and other

modulation information not available

0b00100: 2 streams with PSI = stream1 and other

modulation = QPSK

0b00101: 2 streams with PSI = stream1 and other

modulation = 16QAM

0b00110: 2 streams with PSI = stream1 and other

modulation = 64QAM

0b00111: 2 streams with PSI = stream1 and other

modulation information not available

0b01000: 3 streams with PSI = stream0

0b01001: 3 streams with PSI = stream1

0b01010: 3 streams with PSI = stream2

0b01011: 4 streams with PSI = stream0

0b01100: 4 streams with PSI = stream1

0b01101: 4 streams with PSI = stream2

0b01110: 4 streams with PSI = stream3

0b01111: 3 streams with PSI = stream0 and stream1

0b10000: 4 streams with PSI = stream0 and stream1

0b10001: 4 streams with PSI = stream2 and stream3

0b10010: 3 streams with PSI = stream2 and other

modulation = QPSK

0b10011: 3 streams with PSI = stream2 and other

modulation = 16QAM

0b10100: 3 streams with PSI = stream2 and other

modulation = 64QAM

0b10101: 3 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b10110: 3 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b10111: 3 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11000: 4 streams with PSI = stream0 and stream1

and other modulation = QPSK

0b11001: 4 streams with PSI = stream0 and stream1

and other modulation = 16QAM

0b11010: 4 streams with PSI = stream0 and stream1

and other modulation = 64QAM

0b11011: 4 streams with PSI = stream2 and stream3

and other modulation = QPSK

0b11100: 4 streams with PSI = stream2 and stream3

and other modulation = 16QAM

0b11101: 4 streams with PSI = stream2 and stream3

and other modulation = 64QAM

0b11110: reserved

0b11111: reserved

where MU-MIMO stands for multi-user multiple input multiple output, QPSK stands for quadrature phase-shift keying, and QAM stands for quadrature amplitude modulation.

12. The wireless communications system as in claim 11 , wherein the base station further transmits, to the user equipment, a data signal in accordance with the data stream parameters.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 13, 2015

From: NEC LABORATORIES AMERICA, INC.

To: NEC CORPORATION

Reel/Frame 034765/0565 →