Sequence-based signal processing method and apparatus

• US 10,568,120 B2
• Filed: 07/23/2019
• Issued: 02/18/2020
• Est. Priority Date: 09/08/2017
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Qu, Bingyu, Sun, Hao
• Primary Examiner(s): Lin, Will W
• Application Number:
  US16/519,922
• Publication Number:
  US 20190349967A1
• Time in Patent Office: 210 Days
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/2614 Peak power aspects
• CPC Class Codes: H04L 27/2628 Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators H04L27/2634 takes precedence
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A sequence-based signal processing method and apparatus are provided. A sequence meeting a requirement for sending a signal by using a physical uplink control channel (PUCCH) is determined, where the sequence is a sequence {f_n} consisting of N elements, f_n is an element in the sequence {f_n}, and the determined sequence {f_n} is a sequence meeting a preset condition; then, the N elements in the sequence {f_n} are respectively mapped to N subcarriers to generate a first signal; and the first signal is sent. By using the determined sequence, when a signal is sent by using a PUCCH, a low sequence correlation can be maintained, and a relatively small peak-to-average power ratio (PAPR) value and cubic metric (CM) value can also be maintained, thereby meeting a requirement of a communication application environment in which a signal is sent by using a PUCCH.

Claims

1. A method comprising:

determining, by a terminal, a sequence {f_n} consisting of 18 elements, wherein f_n is an element in the sequence {f_n}, f_n meets f_n=x_n−

e<sup>2π

·

j·

a·

n</sup>, 0≤

n≤

17, n is an integer, a is a real number, x_n=u·

e·

<sup>π

·

j·

sn/4</sup>, u is a non-zero complex number, s_n is an element in a sequence {s_n} consisting of 18 elements, the sequence {s_n} belongs to a sequence set, and the sequence set comprises {−

3, 3, −

1, 1, 3, 1, −

3, −

1, 1, 1, −

3, 1, 3, 3, −

1, −

3, −

3, −

3};

mapping, by the terminal, the sequence {f_n} to 18 subcarriers to generate a first signal; and

sending, by the terminal, the first signal.

2. The method according to claim 1, wherein mapping the sequence {f_n} to the 18 subcarriers comprises:

respectively mapping the 18 elements in the sequence {f_n} to 18 equally spaced subcarriers.

3. The method according to claim 1, wherein the sequence set further comprises {1, −

1, 3, 1, 3, 1, −

3, −

3, 1, 1, 3, 3, −

1, 1, −

3, −

1, −

3, −

3}.

4. The method according to claim 1, wherein the sequence set further comprises following sequences:

{3, 3, −

1, 3, 1, 1, 1, −

3, 1, −

1, −

1, 3, 3, 3, 1, 3, −

3, −

3},

{−

3, 1, −

3, 3, 1, −

1, 3, −

3, 1, 3, −

3, −

3, −

1, −

1, −

1, −

3, −

3, −

3}, and

{3, −

1, 3, −

3, −

3, 1, −

1, 3, 3, 3, −

3, 3, 3, −

1, −

1, −

1, −

3, −

3}.

5. The method according to claim 1, wherein the sequence set further comprises a sequence {s_n} whose elements s_n meet s_n=q_n+u_n(mod 8), wherein q_n represents elements of a sequence {q_n} and u_n represents elements of a sequence {u_n}, and the sequences {q_n} and {u_n} are at least one of the following combinations:

a sequence {q_n} is {−

1, 1, −

1, −

1, 1, −

3, −

1, −

3, 1, −

1, 1, 3, −

3, 3, 1, 1, −

3, −

3}, and a sequence {u_n} is {6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4};

a sequence {q_n} is {−

1, 1, 3, −

3, 1, −

3, 1, −

1, 1, 1, −

3, 3, 1, −

1, −

3, −

3, −

3, −

3}, and a sequence {u_n} is {6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2};

a sequence {q_n} is {3, −

1, 1, −

3, 3, 3, 1, 1, 3, 3, −

3, −

1, 1, −

1, −

3, 1, −

3, −

3}, and a sequence {u_n} is {2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6};

a sequence {q_n} is {3, −

1, −

1, −

3, 1, −

3, 1, −

3, −

3, −

1, 3, 3, 3, 3, 3, 1, −

3, −

3}, and a sequence {u_n} is {0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6};

a sequence {q_n} is {1, 3, −

3, 3, −

3, −

1, −

3, 1, −

3, −

1, −

1, 3, 1, −

1, −

1, −

1, −

3, −

3}, and a sequence {u_n} u_n is {4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6};

a sequence {q_n} is {3, −

3, −

3, −

1, −

1, 3, −

1, −

3, −

1, 1, −

1, −

3, 1, 3, −

1, −

1, −

3, −

3}, and a sequence {u_n} is {6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4};

a sequence {q_n} is {−

1, 3, −

3, 1, −

3, −

3, 1, 3, 1, −

3, 1, 1, 3, 3, −

1, −

3, −

3, −

3}, and a sequence {u_n} is {6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2};

a sequence {q_n} is {−

1, 3, 1, 3, 1, −

1, −

3, −

3, 1, −

3, −

3, −

3, 1, 3, −

3, 3, −

3, −

3}, and a sequence {u_n} is {6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4};

a sequence {q_n} is {−

1, 3, 3, −

3, 1, 3, 1, −

1, 1, 1, −

1, 3, −

3, 3, 3, −

1, −

3, −

3}, and a sequence {u_n} is {2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6};

a sequence {q_n} is {3, 1, −

3, 3, 1, −

3, −

1, 1, 1, −

1, 3, −

3, 3, −

1, 1, −

3, −

3, −

3}, and a sequence {u_n} is {2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4};

a sequence {q_n} is {−

3, 3, 3, −

1, −

3, −

3, 3, −

3, 1, 3, 3, −

1, 1, 1, −

3, 3, −

3, −

3}, and a sequence {u_n} is {6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2};

a sequence {q_n} is {3, −

1, −

1, 3, 3, 1, −

3, 1, −

3, 3, −

3, −

1, −

1, −

1, −

1, −

1, −

3, −

3}, and a sequence {u_n} is {2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0}; and

a sequence {q_n} is {−

3, −

1, 1, −

3, −

1, −

3, −

3, −

3, −

1, −

3, 1, −

1, −

3, 1, 1, 1, −

3, −

3}, and a sequence {u_n} is {6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0}.

6. The signal processing method according to claim 1, wherein the first signal is a demodulation reference signal (DMRS) or uplink control information (UCI).

7. An apparatus comprising:

a storage medium including processor-executable instructions; and

a processor coupled to the storage medium;

wherein the processor-executable instructions, when executed by the processor, cause the apparatus to;

determine, by a terminal, a sequence {f_n} consisting of 18 elements, wherein f_n is an element in the sequence {f_n}, f_n meets f_n=x_n−

e<sup>2π

·

j·

a·

n</sup>, 0≤

n≤

17, n is an integer, a is a real number, x_n=u·

e·

<sup>π

·

j·

sn/4</sup>, u is a non-zero complex number, s_n is an element in a sequence {s_n} consisting of 18 elements, the sequence {s_n} belongs to a sequence set, and the sequence set comprises {−

3, 3, −

1, 1, 3, 1, −

3, −

1, 1, 1, −

3, 1, 3, 3, −

1, −

3, −

3, −

3};

map the sequence {f_n} to 18 subcarriers to generate a first signal; and

send the first signal.

8. The apparatus according to claim 7, wherein the mapping the sequence {f_n} to the 18 subcarriers comprises:

respectively mapping the 18 elements in the sequence {f_n} to 18 equally spaced subcarriers.

9. The apparatus according to claim 7, wherein the sequence set further comprises {1, −

1, 3, 1, 3, 1, −

3, −

3, 1, 1, 3, 3, −

1, 1, −

3, −

1, −

3, −

3}.

10. The apparatus according to claim 7, wherein the sequence set further comprises following sequences:

{3, 3, −

1, 3, 1, 1, 1, −

3, 1, −

1, −

1, 3, 3, 3, 1, 3, −

3, −

3},

{−

3, 1, −

3, 3, 1, −

1, 3, −

3, 1, 3, −

3, −

3, −

1, −

1, −

1, −

3, −

3, −

3}, and

{3, −

1, 3, −

3, −

3, 1, −

1, 3, 3, 3, −

3, 3, 3, −

1, −

1, −

1, −

3, −

3}.

11. The apparatus according to claim 7, wherein the sequence set further comprises sequence {s_n} whose elements s_n meet s_n=q_n+u_n(mod 8), wherein q_n represents elements of a sequence {q_n} and u_n represents elements of a sequence {u_n}, and the sequences {q_n} and {u_n} are at least one of the following combinations:

a sequence {q_n} is {−

1, 1, −

1, −

1, 1, −

3, −

1, −

3, 1, −

1, 1, 3, −

3, 3, 1, 1, −

3, −

3}, and a sequence {u_n} is {6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4};

a sequence {q_n} is {−

1, 1, 3, −

3, 1, −

3, 1, −

1, 1, 1, −

3, 3, 1, −

1, −

3, −

3, −

3, −

3}, and a sequence {u_n} is {6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2};

a sequence {q_n} is {3, −

1, 1, −

3, 3, 3, 1, 1, 3, 3, −

3, −

1, 1, −

1, −

3, 1, −

3, −

3}, and a sequence {u_n} consisting of elements u_n is {2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6};

a sequence {q_n} is {3, −

1, −

1, −

3, 1, −

3, 1, −

3, −

3, −

1, 3, 3, 3, 3, 3, 1, −

3, −

3}, and a sequence {u_n} is {0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6};

a sequence {q_n} is {1, 3, −

3, 3, −

3, −

1, −

3, 1, −

3, −

1, −

1, 3, 1, −

1, −

1, −

1, −

3, −

3}, and a sequence {u_n} is {4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6};

a sequence {q_n} is {3, −

3, −

3, −

1, −

1, 3, −

1, −

3, −

1, 1, −

1, −

3, 1, 3, −

1, −

1, −

3, −

3}, and a sequence {u_n} is {6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4};

a sequence {q_n} is {−

1, 3, −

3, 1, −

3, −

3, 1, 3, 1, −

3, 1, 1, 3, 3, −

1, −

3, −

3, −

3}, and a sequence {u_n} is {6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2};

a sequence {q_n} is {−

1, 3, 1, 3, 1, −

1, −

3, −

3, 1, −

3, −

3, −

3, 1, 3, −

3, 3, −

3, −

3}, and a sequence {u_n} is {6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4};

a sequence {q_n} is {−

1, 3, 3, −

3, 1, 3, 1, −

1, 1, 1, −

1, 3, −

3, 3, 3, −

1, −

3, −

3}, and a sequence {u_n} is {2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6};

a sequence {q_n} is {3, 1, −

3, 3, 1, −

3, −

1, 1, 1, −

1, 3, −

3, 3, −

1, 1, −

3, −

3, −

3}, and a sequence {u_n} is {2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4};

a sequence {q_n} is {−

3, 3, 3, −

1, −

3, −

3, 3, −

3, 1, 3, 3, −

1, 1, 1, −

3, 3, −

3, −

3}, and a sequence {u_n} is {6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 6, 2, 6, 2};

a sequence {q_n} is {3, −

1, −

1, 3, 3, 1, −

3, 1, −

3, 3, −

3, −

1, −

1, −

1, −

1, −

1, −

3, −

3}, and a sequence {u_n} is {2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0}; and

a sequence {q_n} is {−

3, −

1, 1, −

3, −

1, −

3, −

3, −

3, −

1, −

3, 1, −

1, −

3, 1, 1, 1, −

3, −

3}, and a sequence {u_n} is {6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0}.

12. The apparatus according to claim 7, wherein the first signal is a demodulation reference signal (DMRS) or uplink control information (UCI).

13. A non-transitory computer-readable storage medium, comprising processor-executable instructions, wherein the processor-executable instructions, when executed by a processor of a computer, cause the computer to:

determine, by a terminal, a sequence {f_n} consisting of 18 elements, wherein f_n is an element in the sequence {f_n}, f_n meets f_n=x_n−

e<sup>2π

·

j·

a·

n</sup>, 0≤

n≤

17, n is an integer, a is a real number, x_n=u·

e·

<sup>π

·

j·

sn/4</sup>, U is a non-zero complex number, s_n is an element in a sequence {s_n} consisting of 18 elements, the sequence {s_n} belongs to a sequence set, and the sequence set comprises {−

3, 3, −

1, 1, 3, 1, −

3, −

1, 1, 1, −

3, 1, 3, 3, −

1, −

3, −

3, −

3};

map the sequence {f_n} to 18 subcarriers to generate a first signal; and

send the first signal.

14. The non-transitory computer-readable storage medium according to claim 13, wherein the mapping the sequence {f_n} to the 18 subcarriers comprises:

respectively mapping the 18 elements in the sequence {f_n} to 18 equally spaced subcarriers.

15. The non-transitory computer-readable storage medium according to claim 13, wherein the sequence set further comprises {1, −

1, 3, 1, 3, 1, −

3, −

3, 1, 1, 3, 3, −

1, 1, −

3, −

1, −

3, −

3}.

16. The non-transitory computer-readable storage medium according to claim 13, wherein the sequence set further comprises following sequences:

{3, 3, −

1, 3, 1, 1, 1, −

3, 1, −

1, −

1, 3, 3, 3, 1, 3, −

3, −

3},

{−

3, 1, −

3, 3, 1, −

1, 3, −

3, 1, 3, −

3, −

3, −

1, −

1, −

1, −

3, −

3, −

3}, and

{3, −

1, 3, −

3, −

3, 1, −

1, 3, 3, 3, −

3, 3, 3, −

1, −

1, −

1, −

3, −

3}.

17. The non-transitory computer-readable storage medium according to claim 13, wherein the sequence set further comprises sequence {s_n} whose elements s_n meet s_n=q_n+u_n(mod 8), wherein q_n represents elements of a sequence {q_n} and u_n represents elements of a sequence {u_n}, and the sequences {q_n} and {u_n} are at least one of the following combinations:

a sequence {q_n} is {−

1, 1, −

1, −

1, 1, −

3, −

1, −

3, 1, −

1, 1, 3, −

3, 3, 1, 1, −

3, −

3}, and a sequence {u_n} is {6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4};

a sequence {q_n} is {−

1, 1, 3, −

3, 1, −

3, 1, −

1, 1, 1, −

3, 3, 1, −

1, −

3, −

3, −

3, −

3}, and a sequence {u_n} is {6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2};

a sequence {q_n} is {3, −

1, 1, −

3, 3, 3, 1, 1, 3, 3, −

3, −

1, 1, −

1, −

3, 1, −

3, −

3}, and a sequence {u_n} is {2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6};

a sequence {q_n} is {3, −

1, −

1, −

3, 1, −

3, 1, −

3, −

3, −

1, 3, 3, 3, 3, 3, 1, −

3, −

3}, and a sequence {u_n} is {0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6};

a sequence {q_n} is {1, 3, −

3, 3, −

3, −

1, −

3, 1, −

3, −

1, −

1, 3, 1, −

1, −

1, −

1, −

3, −

3}, and a sequence {u_n} is {4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6};

a sequence {q_n} is {3, −

3, −

3, −

1, −

1, 3, −

1, −

3, −

1, 1, −

1, −

3, 1, 3, −

1, −

1, −

3, −

3}, and a sequence {u_n} is {6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4};

a sequence {q_n} is {−

1, 3, −

3, 1, −

3, −

3, 1, 3, 1, −

3, 1, 1, 3, 3, −

1, −

3, −

3, −

3}, and a sequence {u_n} is {6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2};

a sequence {q_n} is {−

1, 3, 1, 3, 1, −

1, −

3, −

3, 1, −

3, −

3, −

3, 1, 3, −

3, 3, −

3, −

3}, and a sequence {u_n} is {6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4};

a sequence {q_n} is {−

1, 3, 3, −

3, 1, 3, 1, −

1, 1, 1, −

1, 3, −

3, 3, 3, −

1, −

3, −

3}, and a sequence {u_n} is {2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6};

a sequence {q_n} is {3, 1, −

3, 3, 1, −

3, −

1, 1, 1, −

1, 3, −

3, 3, −

1, 1, −

3, −

3, −

3}, and a sequence {u_n} is {2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4};

a sequence {q_n} is {−

3, 3, 3, −

1, −

3, −

3, 3, −

3, 1, 3, 3, −

1, 1, 1, −

3, 3, −

3, −

3}, and a sequence {u_n} is {6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2};

a sequence {q_n} is {3, −

1, −

1, 3, 3, 1, −

3, 1, −

3, 3, −

3, −

1, −

1, −

1, −

1, −

1, −

3, −

3}, and a sequence {u_n} is {2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0, 6, 4, 2, 0}; and

a sequence {q_n} is {−

3, −

1, 1, −

3, −

1, −

3, −

3, −

3, −

1, −

3, 1, −

1, −

3, 1, 1, 1, −

3, −

3}, and a sequence {u_n} is {6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0}.

18. The non-transitory computer-readable storage medium according to claim 13, wherein the first signal is a demodulation reference signal (DMRS) or uplink control information (UCI).