# US 2019/0173636 A1 · Method for transmitting and receiving signal in wireless lan system and apparatus therefor

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0173636 A1
- Document ID: US20190173636A1
- Status: Published application
- Kind: A1
- Application number: 16/322,284
- Filed: 2018-03-27
- Published: 2019-06-06
- Earliest claimed: 2017-03-29
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Sunwoong YUN; Jinmin KIM; Sungjin PARK; Jinsoo CHOI
- Web page: https://patentgrep.com/patent/US20190173636A1

## CPC

- H04L 27/2613: {Structure of the reference signals}
- H04L 1/06: using space diversity
- H04L 5/0023: {Time-frequency-space}
- H04L 5/0039: {Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence)
- H04L 27/2614: {Peak power aspects}
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

The present specification suggests a method for transmitting and receiving a signal, by a station, in a wireless LAN (WLAN) system supporting a maximum of eight space time streams, and an apparatus therefor. More specifically, the present specification suggests a method for transmitting and receiving a signal including a pilot sequence for 2 channel bonding per each space time stream when a station transmits and receives a signal through a channel in which two channels are bonded, and an apparatus therefor.

## Claims

### Claim 1

A method in a wireless LAN (WLAN) system, the method comprising:
generating, by a first station (STA) supporting a plurality of space time streams (STSs), a first pilot sequence related with 36 subcarriers for two bonded channels based on a second pilot sequence related with 12 subcarriers, wherein the second pilot sequence is set to one sequence among a plurality of second pilot sequences for the plurality of STSs, wherein the plurality of the second pilot sequences are mutually orthogonal, wherein a maximum number of the STSs supported by the first STA is eight; and
transmitting, by the first STA to a second STA, a signal including the first pilot sequence through the two bonded channels.

### Claim 2 (depends on 1)

The method of claim 1, wherein
the signal is transmitted through up to 8 STSs.

### Claim 3 (depends on 1)

The method of claim 1, wherein
the first pilot sequence is configured by repeating the second pilot sequence three times.

### Claim 4 (depends on 3)

The method of claim 3, wherein
the plurality of the second pilot sequences for the plurality of STSs are set as shown in Table below:
TABLE
iSTS
P12(iSTS, :)
1
[−1 +1 −1 +1 +1 −1 −1 −1 −1 −1 +1 +1]
2
[+1 −1 +1 +1 −1 −1 −1 −1 −1 +1 +1 −1]
3
[−1 +1 +1 −1 −1 −1 −1 −1 +1 +1 −1 +1]
4
[+1 +1 −1 −1 −1 −1 −1 +1 +1 −1 +1 −1]
5
[+1 −1 −1 −1 +1 −1 −1 +1 −1 +1 −1 +1]
6
[−1 −1 +1 −1 −1 −1 +1 +1 −1 −1 +1 +1]
7
[−1 −1 −1 +1 −1 +1 −1 +1 +1 +1 +1 +1]
8
[−1 −1 −1 −1 +1 −1 +1 −1 +1 +1 +1 −1]
where P12(iSTS,:) denotes the second pilot sequence and iSTS denotes a space-time stream index.

### Claim 5

A method in a wireless LAN (WLAN) system, the method comprising:
receiving, by a first station (STA) supporting a plurality of space time streams (STSs), a signal including a first pilot sequence related with 36 subcarriers through two bonded channels, wherein the first pilot sequence is generated based on a second pilot sequence related with 12 subcarriers, wherein the second pilot sequence is set to one sequence among a plurality of second pilot sequences for the plurality of STSs, wherein the plurality of the second pilot sequences are mutually orthogonal, wherein a maximum number of the STSs supported by the first STA is eight; and
decoding the received signal based on the received first pilot sequence.

### Claim 6 (depends on 5)

The method of claim 5, wherein
the signal is transmitted through up to 8 STSs.

### Claim 7 (depends on 5)

The method of claim 5, wherein
the first pilot sequence is configured by repeating the second pilot sequence three times.

### Claim 8 (depends on 7)

The method of claim 7, wherein
the plurality of the second pilot sequences for plurality of STSs are set as shown in Table below:
TABLE
iSTS
P12(iSTS, :)
1
[−1 +1 −1 +1 +1 −1 −1 −1 −1 −1 +1 +1]
2
[+1 −1 +1 +1 −1 −1 −1 −1 −1 +1 +1 −1]
3
[−1 +1 +1 −1 −1 −1 −1 −1 +1 +1 −1 +1]
4
[+1 +1 −1 −1 −1 −1 −1 +1 +1 −1 +1 −1]
5
[+1 −1 −1 −1 +1 −1 −1 +1 −1 +1 −1 +1]
6
[−1 −1 +1 −1 −1 −1 +1 +1 −1 −1 +1 +1]
7
[−1 −1 −1 +1 −1 +1 −1 +1 +1 +1 +1 +1]
8
[−1 −1 −1 −1 +1 −1 +1 −1 +1 +1 +1 −1]
where P12(iSTS,:) denotes the second pilot sequence and iSTS denotes a space-time stream index.

### Claim 9

A station device supporting a plurality of space time streams (STSs) in a wireless LAN (WLAN) system, the station device comprising:
a transceiver unit having at least one radio frequency (RF) chain and configured to transmit and receive a signal to and from another station device; and
a processor connected to the transceiver unit and processing the signal transmitted to or received from the other station device,
wherein the processor is configured to:
generate a first pilot sequence related with 36 subcarriers for two bonded channels based on a second pilot sequence related with 12 subcarriers, wherein the second pilot sequence is set to one sequence among a plurality of second pilot sequences for the plurality of STSs, wherein the plurality of the second pilot sequences are mutually orthogonal, wherein a maximum number of the STSs supported by the station device is eight; and
transmit, to the another station device, a signal including the first pilot sequence through the two bonded channels.

### Claim 10

(canceled)