Method of transmitting reference signal and transmitter using the same

Patent metadata

Field	Value
Publication number	US-10673667-B2
Application number	US-201816023910-A
Country	US
Kind code	B2
Filing date	Jun 29, 2018
Priority date	Mar 17, 2008
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A method and device for generating a reference signal sequence are discussed. The method includes generating the reference signal sequence, and transmitting the reference signal sequence, wherein the reference signal sequence is defined by a specific equation based on a pseudo-random sequence.

First claim

What is claimed is:

1. A method performed by a transmitting device, the method comprising:
generating a reference signal sequence; and
transmitting the reference signal sequence to a receiver,
wherein the reference signal sequence is defined by

r
⁡

(
m
)

=

1

2

⁢

(

1
-

2
·

c
⁡

(

2
⁢

⁢
m

)

)

+

j
⁢

1

2

⁢

(

1
-

2
·

c
⁡

(

2
⁢

⁢
m

+
1

)

)

where m=0, . . . , M, M is an integer larger than zero, and c(2m) and c(2m+1) are defined by a pseudo-random sequence c(i), and
wherein the pseudo-random sequence c(i) is defined by a gold sequence generator which is initialized with an initial value obtained by using (2N ID cell ), where N ID cell is a cell identifier.

2. The method of claim 1 , wherein the pseudo-random sequence c(i) is defined by
c ( i )=( x ( i+Nc )+ y ( i+Nc ))mod 2
x ( i+ 31)=( x ( i+ 3)+ x ( i ))mod 2
y ( i+ 31)=( y ( i+ 3)+ y ( i+ 2)+ y ( i+ 1)+ y ( i ))mod 2
where x(i) and y(i) are m-sequences and Nc is a constant.

3. The method of claim 1 , wherein the initial value is obtained by using (2N ID cell +1) and an orthogonal frequency division multiplexing (OFDM) symbol number.

4. The method of claim 1 , further comprising:
mapping the reference signal sequence to at least one resource block (RB) before transmitting the reference signal sequence.

5. The method of claim 4 , wherein a value relates to the number of the at least one RB.

6. A device comprising:
a reference signal generator configured to generate a reference signal sequence; and
a transmit circuitry configured to transmit the reference signal sequence to a receiver,
wherein the reference signal sequence is defined by

r
⁡

(
m
)

=

1

2

⁢

(

1
-

2
·

c
⁡

(

2
⁢

⁢
m

)

)

+

j
⁢

1

2

⁢

(

1
-

2
·

c
⁡

(

2
⁢

⁢
m

+
1

)

)

where m=0, . . . , M, M is an integer larger than zero, and c(2m) and c(2m+1) are defined by a pseudo-random sequence c(i), and
wherein the pseudo-random sequence c(i) is defined by a gold sequence generator which is initialized with an initial value obtained by using (2N ID cell +1), where N ID cell is a cell identifier.

7. The device of claim 6 , wherein the pseudo-random sequence c(i) is defined by
c ( i )=( x ( i+Nc )+ y ( i+Nc ))mod 2
x ( i+ 31)=( x ( i+ 3)+ x ( i ))mod 2
y ( i+ 31)=( y ( i+ 3)+ y ( i+ 2)+ y ( i+ 1)+ y ( i ))mod 2
where x(i) and y(i) are m-sequences and Nc is a constant.

8. The device of claim 6 , wherein the initial value is obtained by using (2N ID cell +1) and an orthogonal frequency division multiplexing (OFDM) symbol number.

9. The device of claim 6 , wherein the transmit circuitry is configured to map the reference signal sequence to at least one resource block (RB) before transmitting the reference signal sequence.

10. The device of claim 9 , wherein a value of M relates to the number of the at least one RB.

Assignees

• Lg Electronics Inc

Inventors

• Lee Jung Hoon
• Lee Dae Won
• Kim Ki Jun
• Ahn Joon Kui

Classifications

• H04L27/2613 Primary

  Structure of the reference signals · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L25/0226

  sounding signals per se · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• Y02D70/12

  Cross-Sectional Technologies · mapped topic