Signal generation method and apparatus

Patent metadata

Field	Value
Publication number	US-12137019-B2
Application number	US-202318175186-A
Country	US
Kind code	B2
Filing date	Feb 27, 2023
Priority date	Aug 31, 2020
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

This application provides a signal generation method and an apparatus. In the method, a first communication apparatus generates a first signal, and sends the first signal to a second communication apparatus, who receives the first signal, and then demodulates the first signal. A symbol included in the first signal is carried on K+2(M−1) subcarriers. Middle K subcarriers are valid subcarriers, start M−1 subcarriers and last M−1 subcarriers are redundant subcarriers, and a subcarrier spacing between adjacent subcarriers is related to a feature of a time domain pulse used to shape the subcarrier, wherein a width of each of some or all side lobes of a spectrum of the time domain pulse is equal to 1/M of a main lobe width of the time domain pulse, the subcarrier spacing is 1/M of the main lobe width. K is a positive integer, and M is a positive integer greater than 1.

First claim

What is claimed is:

1. A method, wherein the method comprises:
generating, by a first communication apparatus, a first signal, wherein a symbol comprised in the first signal is carried on K+2(M−1) subcarriers, and the K+2(M−1) subcarriers are shaped using a time domain pulse that satisfies following: a width of each of some or all side lobes of a spectrum of the time domain pulse is equal to 1/M of a main lobe width, a subcarrier spacing between adjacent subcarriers is 1/M of the main lobe width, starting M−1 subcarriers and last M−1 subcarriers in the K+2(M−1) subcarriers are redundant subcarriers, K is a positive integer, and M is a positive integer greater than 1; and
sending, by the first communication apparatus, the first signal.

2. The method according to claim 1 , wherein the first signal comprises a time domain self-cyclic pulse signal that comprises L time domain pulses and that has a length of βTL, Tis a window length of the time domain pulse, βT is a pulse interval between adjacent time domain pulses of the L time domain pulses, L is a positive integer, and β is a positive number.

3. The method according to claim 2 , wherein β is greater than or equal to 1/M, and is less than or equal to 1.

4. The method according to claim 2 , wherein
the first signal satisfies:

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Assignees

• Huawei Tech Co Ltd

Inventors

• Feng Qi
• Hu Yuanzhou
• He Gaoning
• Lu Jianmin

Classifications

• H04L27/264

  Pulse-shaped multi-carrier, i.e. not using rectangular window · CPC title

• H04L27/26025

  Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003) · CPC title

• H04J11/0026

  of multi-user interference · CPC title

• H04L5/0062

  Avoidance of ingress interference, e.g. ham radio channels · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title