# US 12,192,039 B2 · Method for generating low PAPR sequence in wireless communication system, and apparatus for same

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- Number: US 12,192,039 B2
- Document ID: US12192039B2
- Status: Granted
- Kind: B2
- Application number: 17/431,258
- Filed: 2020-02-17
- Published: 2022-02-17
- Granted: 2025-01-07
- Earliest claimed: 2019-02-15
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Hyunsu Cha; Sukhyon Yoon; Kilbom Lee; Haewook Park
- Web page: https://patentgrep.com/patent/US12192039B2

## CPC

- H04L 27/26134: {Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain}
- H04L 27/2614: {Peak power aspects}
- H04L 27/2607: {Cyclic extensions}
- H04L 27/2613: {Structure of the reference signals}
- H04L 27/262: {Reduction thereof by selection of pilot symbols}
- H04L 27/2636: {with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]}
- H04J 13/0025: {M-sequences}
- H04J 13/0055: {ZCZ [zero correlation zone]}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)

## Abstract

The present specification, provides a method for generating a low peak to average power ratio (PAPR) sequence in a wireless communication system. Specifically, the present specification relates to a method for generating a low PAPR sequence in a wireless communication system, the method comprising the steps of: generating a sequence of length-6 having a symbol as each element of the sequence; and generating the low PAPR sequence on the basis of the sequence of length-6.

## Claims

### Claim 1

A method performed by a wireless device in a wireless communication system, the method comprising:
generating a length-6 sequence having an 8 phase shift keying (PSK) symbol as each element of the sequence; and
generating a low peak to average power ratio (PAPR) sequence based on the length-6 sequence,
wherein the length-6 sequence is determined by ejφ(i)π/8,
wherein the i is an index of elements of the length-6 sequence,
wherein a value of the φ(i) includes values of (φ(0), φ(1), φ(2), φ(3), φ(4), φ(5)) based on a group number u related to the low PAPR sequence, and
wherein the values of (φ(0), φ(1), φ(2), φ(3), φ(4), φ(5)) include i) (−7, 3, 1, 5, −1, 3), ii) (−7, −5, −1, −7, −5, 5), iii) (−7, 1, −3, 3, 7, 5), and iv) (−7, 1, −3, 1, 5, 1).

### Claim 2 (depends on 1)

The method of claim 1, wherein a number of groups related to the low PAPR sequence is 30.

### Claim 3 (depends on 1)

The method of claim 1, wherein the low PAPR sequence is used for at least one of a DFT-s-OFDM (Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing) system or a CP-OFDM (Cyclic Prefix OFDM) system.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
applying a Frequency Domain Spectrum Shaping (FDSS) to the low PAPR sequence.

### Claim 5 (depends on 1)

The method of claim 1, wherein the low PAPR sequence is Frequency Division Multiplexed (FDM) for 2 antenna ports as a Comb-2 form.

### Claim 6 (depends on 5)

The method of claim 5,
wherein the low PAPR sequence which is used for each of the 2 antenna ports is different for each other.

### Claim 7

A wireless device configured to operate in a wireless communication system, the wireless device comprising:
a memory storing instructions;
a transceiver configured to transmit and receive radio signals; and
a processor operatively coupled to the transceiver and configured to execute the instructions to perform operations comprising:
generating a length-6 sequence having an 8 phase shift keying (PSK) symbol as each element of the sequence; and
generating a low peak to average power ratio (PAPR) sequence based on the length-6 sequence,
wherein the length-6 sequence is determined by ejφ(i)π/8,
wherein the i is an index of elements of the length-6 sequence,
wherein a value of the φ(i) includes values of (φ(0), φ(1), φ(2), φ(3), φ(4), φ(5)) based on a group number u related to the low PAPR sequence, and
wherein the values of (φ(0), φ(1), φ(2), φ(3), φ(4), φ(5)) include i) (−7, 3, 1, 5, −1, 3), ii) (−7, −5, −1, −7, −5, 5), iii) (−7, 1, −3, 3, 7, 5), and iv) (−7, 1, −3, 1, 5, 1).

### Claim 8 (depends on 7)

The wireless device of claim 7,
wherein a number of groups related to the low PAPR sequence is 30.

### Claim 9 (depends on 7)

The wireless device of claim 7,
wherein the low PAPR sequence is used for at least one of a DFT-s-OFDM (Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing) system or a CP-OFDM (Cyclic Prefix OFDM) system.

### Claim 10 (depends on 7)

The wireless device of claim 7,
wherein the low PAPR sequence is Frequency Division Multiplexed (FDM) for 2 antenna ports as a Comb-2 form.

### Claim 11 (depends on 10)

The wireless device of claim 10,
wherein the low PAPR sequence which is used for each of the 2 antenna ports is different for each other.

### Claim 12

An apparatus comprising:
one or more memories storing instructions; and
one or more processors operatively coupled to the one or more memories and configured to execute the instructions to perform operations comprising:
generating a length-6 sequence having an 8 phase shift keying (PSK) symbol as each element of the sequence; and
generating a low peak to average power ratio (PAPR) sequence based on the length-6 sequence,
wherein the length-6 sequence is determined by ejφ(i)π/8,
wherein the i is an index of elements of the length-6 sequence,
wherein a value of the φ(i) includes values of (φ(0), φ(1), φ(2), φ(3), φ(4), φ(5)) based on a group number u related to the low PAPR sequence, and wherein the values of (φ(0), φ(1), φ(2), φ(3), φ(4), φ(5)) include i) (−7, 3, 1, 5, −1, 3), ii) (−7, −5, −1, −7, −5, 5), iii) (−7, 1, −3, 3, 7, 5), and iv) (−7, 1, −3, 1, 5, 1).