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Synchronization method and device

A technology of synchronizing sequence and starting position, applied in the direction of synchronizing device, synchronizing device, synchronizing signal speed/phase control, etc., can solve problems such as interference

Active Publication Date: 2020-12-22
CHENGDU HUAWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the clock frequency of reflector 1 is 20% lower than the clock frequency specified in the standard, the transmission time of the reflected signal sent by reflector 1 is actually 1.2T, causing the base station to simultaneously receive the signals sent by reflector 1 and reflector 2 at time 2. , the reflected signal sent by reflector 1 will interfere with the reflected signal sent by reflector 2

Method used

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  • Synchronization method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] see image 3 , is a schematic flow chart of a synchronization method provided in the embodiment of the present application. The method includes:

[0098] Step 301: The exciter sends an excitation signal.

[0099] As mentioned above, the excitation signal may be a single-tone signal or a multi-tone signal, which is not limited in this embodiment of the present application.

[0100] Step 302: The reflector receives the excitation signal from the exciter.

[0101] Step 303: The reflector modulates the data to be transmitted and the synchronization sequence in the excitation signal to obtain a reflected signal, and sends the reflected signal to the receiver.

[0102] Wherein, the transmission duration of the data to be transmitted is greater than the first duration, and / or the data volume of the data to be transmitted is greater than the first data volume.

[0103] Correspondingly, when the data transmission duration is less than or equal to the first duration, and / or w...

Embodiment 2

[0132] In the embodiment of the present application, the reflector may also send a reflected signal including only the synchronization sequence to the receiver, so that the receiver completes signal synchronization according to the synchronization sequence, which will be described in detail below.

[0133] see Figure 10 , is a schematic flow chart of a synchronization method provided in the embodiment of the present application. The method includes:

[0134] Step 1001: The exciter sends an excitation signal.

[0135] As mentioned above, the excitation signal may be a single-tone signal or a multi-tone signal, which is not limited in this embodiment of the present application.

[0136] Step 1002: The reflector receives the excitation signal from the exciter.

[0137] Step 1003: The reflector modulates a synchronization sequence or a synchronization symbol in the excitation signal to obtain a reflection signal.

[0138] It should be noted that the synchronization sequence i...

Embodiment 3

[0172] In the foregoing embodiments, it is described how the reflector sends the synchronization sequence. In another possible embodiment, the reflector may not send the reflection signal including the synchronization sequence, which will be described in detail below.

[0173] see Figure 12 , is a schematic flowchart of a data transmission method provided in the embodiment of the present application. The method includes:

[0174] Step 1201: The exciter sends an excitation signal.

[0175] As mentioned above, the excitation signal may be a single-tone signal or a multi-tone signal, which is not limited in this embodiment of the present application.

[0176] Step 1202: The reflector receives the excitation signal from the exciter.

[0177] Step 1203: The reflector determines the reflection signal according to the excitation signal, and sends the reflection signal to the receiver.

[0178] Wherein, when the transmission duration of the data to be transmitted is greater than ...

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Abstract

The embodiment of the invention provides a synchronization method and device. The method comprises the steps of: enabling a reflector to receive an excitation signal from an exciter; modulating to-be-transmitted data and a synchronization sequence in the excitation signal to obtain a reflection signal, wherein the transmission duration of the to-be-transmitted data is greater than a first duration, and / or the data volume of the to-be-transmitted data is greater than a first data volume; and enabling the reflector to transmit the reflected signal to a receiver.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a synchronization method and device. Background technique [0002] Backscatter communication (backscatter communication) is an extremely low-power, low-cost passive communication technology, which is suitable for scenarios such as the Internet of Things (IoT) that are sensitive to power consumption. In backscatter communication technology, three nodes can be included: exciter, reflector and receiver. Wherein, the exciter and the reflector can also be integrated into the same node, which can be called a reader. The exciter can send a wireless signal, and the wireless signal sent by the exciter can also be called an excitation signal. The excitation signal can be a single-tone signal or a multi-tone signal, and does not carry any data. The excitation signal sent by the exciter is a known signal of the reflector. After the reflector receives the excit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/04H04L7/00
CPCH04W56/0035H04J3/0605H04J13/0025H04J13/0029H04L7/04H04L7/00H04W56/00
Inventor 高宽栋黄煌邵华颜矛
Owner CHENGDU HUAWEI TECH