Signal transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-12313734-B2
Application number	US-202217673159-A
Country	US
Kind code	B2
Filing date	Feb 16, 2022
Priority date	Aug 16, 2019
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A signal transmission method includes a radar detection apparatus selecting a transmit frequency band from a predefined or pre-specified first frequency band. The first frequency band is pre-divided into M sub-frequency bands, and the transmit frequency band includes N sub-frequency bands in the M sub-frequency bands, where a bandwidth of the transmit frequency band is greater than or equal to an operating bandwidth of the radar detection apparatus. A sum of bandwidths of any N−1 sub-frequency bands in the N sub-frequency bands is less than the operating bandwidth of the radar detection apparatus. In addition, a minimum quantity of sub-frequency bands is used to transmit a signal.

First claim

What is claimed is:

1. A method, comprising:
obtaining a preset transmit frequency band comprising a first transmit frequency bandwidth, wherein the preset transmit frequency band comprises N sub-frequency bands, and wherein a first sum of bandwidths of the N sub-frequency bands is equal to the first transmit frequency bandwidth;
selecting, based on the preset transmit frequency band, an operating bandwidth of a first detection apparatus, wherein the operating bandwidth is occupied by a waveform of a signal transmitted by the first detection apparatus, wherein the operating bandwidth is greater than a second sum of bandwidths of N−1 of the N sub-frequency bands and is less than the first sum of bandwidths of the N sub-frequency bands, and wherein the operating bandwidth comprises a total bandwidth of the N−1 of the N sub-frequency bands and a portion of a bandwidth of one of the N sub-frequency bands; and
transmitting, on the operating bandwidth, a first signal.

2. The method of claim 1 , wherein a frequency domain range of the preset transmit frequency band is predefined.

3. The method of claim 1 , wherein distribution of the N sub-frequency bands in the preset transmit frequency band satisfies a predefined or pre-configured rule.

4. The method of claim 1 , wherein obtaining the preset transmit frequency band comprises identifying a first detection frequency band in a plurality of detection frequency bands as the preset transmit frequency band, and wherein a first priority of the first detection frequency band is not lower than a second priority of a second detection frequency band in the plurality of detection frequency bands other than the first detection frequency band.

5. The method of claim 1 , wherein obtaining the preset transmit frequency band comprises identifying a first detection frequency band in a plurality of detection frequency bands as the transmit frequency band, and wherein a first idle degree of the first detection frequency band is not lower than a second idle degree of a second detection frequency band in the plurality of detection frequency bands other than the first detection frequency band.

6. The method of claim 1 , wherein obtaining the preset transmit frequency band comprises identifying a first detection frequency band in a plurality of detection frequency bands as the transmit frequency band, and wherein a first energy value of the first detection frequency band is not greater than a second energy value of a second detection frequency band in the plurality of detection frequency bands other than the first detection frequency band.

7. The method of claim 6 , further comprising obtaining the first energy value by detecting a second signal that is received on the first detection frequency band.

8. The method of claim 1 , wherein obtaining the preset transmit frequency band comprises:
detecting whether a first detection frequency band is idle;
selecting, when the first detection frequency band is idle, the first detection frequency band as the preset transmit frequency band; and
selecting, when the first detection frequency band is not idle, the preset transmit frequency band as a second detection frequency band that is idle.

9. The method of claim 8 , wherein detecting whether the first detection frequency band is idle comprises:
obtaining an energy value of the first detection frequency band by detecting a second signal that is received on the first detection frequency band;
detecting that the first detection frequency band is idle when the energy value is less than or equal to a preset value; and
detecting that the first detection frequency band is not idle when the energy value is greater than the preset value.

10. An apparatus, comprising:
a memory configured to store instructions; and
one or more processors coupled to the memory and configured to execute the instructions to cause the apparatus to:
obtain a preset transmit frequency band comprising a first transmit frequency bandwidth, wherein the preset transmit frequency band comprises N sub-frequency bands, and wherein a first sum of bandwidths of the N sub-frequency bands is equal to the first transmit frequency bandwidth;
select, based on the preset transmit frequency band, an operating bandwidth of the apparatus, wherein the operating bandwidth is occupied by a waveform of a signal transmitted by the apparatus, wherein the operating bandwidth is greater than a second sum of bandwidths of N−1 of the N sub-frequency bands and is less than the first sum of bandwidths of the N sub-frequency bands, and wherein the operating bandwidth comprises a total bandwidth of the N−1 of the N sub-frequency bands and a portion of a bandwidth of one of the N sub-frequency bands; and

transmit, on the operating bandwidth, a first signal.

11. The apparatus of claim 10 , wherein a frequency domain range of the preset transmit frequency band is predefined.

12. The apparatus of claim 10 , wherein distribution of the N sub-frequency bands in the preset transmit frequency band satisfies a predefined or pre-configured rule.

13. The apparatus of claim 10 , wherein when executed by the one or more processors, the instructions further cause the apparatus to obtain the preset transmit frequency band by identifying a first detection frequency band in a plurality of detection frequency bands as the preset transmit frequency band, and wherein a first priority of the first detection frequency band is not lower than a second priority of a second detection frequency band in the plurality of detection frequency bands other than the first detection frequency band.

14. The apparatus of claim 10 , wherein when executed by the one or more processors, the instructions further cause the apparatus to obtain the preset transmit frequency band by identifying a first detection frequency band in a plurality of detection frequency bands as the preset transmit frequency band, and wherein a first idle degree of the first detection frequency band is not lower than a second idle degree of a second detection frequency band in the plurality of detection frequency bands other than the first detection frequency band.

15. The apparatus of claim 10 , wherein when executed by the one or more processors, the instructions further cause the apparatus to obtain the preset transmit frequency band by identifying a first detection frequency band in a plurality of detection frequency bands as the preset transmit frequency band, and wherein a first energy value of the first detection frequency band is not greater than a second energy value of a second detection frequency band in the plurality of detection frequency bands other than the first detection frequency band.

16. The apparatus of claim 15 , wherein when executed by the one or more processors, the instructions further cause the apparatus to obtain the first energy value by detecting a second signal that is received on the first detection frequency band.

17. The apparatus of claim 10 , wherein when executed by the one or more processors, the instructions further cause the apparatus to:
detect whether a first detection frequency band is idle;
select, when the first detection frequency band is idle, the first detection frequency band as the preset transmit frequency band; and
select, when the first detection frequency band is not idle, the preset transmit frequency band as a second detection frequency band that is idle.

18. The apparatus of claim 17 , wherein when executed by the one or more processors, the instructions further cause the apparatus to:
obtain an energy value

Assignees

• Shenzhen Yinwang Intelligent Technology Co Ltd

Inventors

• Song sida
• Ma Sha
• Wu Qian
• Gao Lei

Classifications

• G01S7/52092

  using frequency diversity · CPC title

• G01S7/021

  Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals · CPC title

• G01S13/931 Primary

  of land vehicles · CPC title

• G01S7/35

  Details of non-pulse systems · CPC title

• G01S7/023 Primary

  Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques (auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36) · CPC title