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A reference signal transmission device, method and system

A reference signal and quasi-reference signal technology, applied in multi-frequency code systems and other directions, can solve problems such as lack of synchronization, frequency deviation, and inability to communicate normally, saving physical resources and improving data transmission efficiency.

Active Publication Date: 2020-06-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various reasons may lead to inaccurate synchronization between devices
[0004] For example, if two vehicles communicate with each other, if the two vehicles are synchronized to two base stations, but the synchronization between the two base stations is not achieved, there may be a frequency deviation in the communication between the two vehicles. The communication frequency between the two vehicles is 6GHz as an example, the frequency deviation between the two vehicles may be as high as 3~7kHz, resulting in the failure of normal communication between them

Method used

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  • A reference signal transmission device, method and system
  • A reference signal transmission device, method and system
  • A reference signal transmission device, method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0291] Such as Figure 5 As shown, the wireless communication system provided in Embodiment 1 includes: a reference signal sending device 501 and a reference signal receiving device 502. For the sake of brevity, the reference signal sending device 501 is referred to as "transmitting device 501" below, and the reference signal The receiving device 502 is referred to as "receiving device 502".

[0292] Wherein, the sending device 501 is configured to determine a reference signal, and send the determined reference signal;

[0293] The receiving device 502 is configured to receive a reference signal and process the received reference signal, such as performing channel estimation, signal demodulation, AGC, wireless measurement, and channel detection based on the received reference signal.

[0294] Figure 6 An optional process for generating and sending a reference signal by the sending device 501 is shown.

[0295] Such as Figure 6 As shown, the process may include the follow...

Embodiment 2

[0312] In Embodiment 2 and Embodiment 3, the reference signal may be the aforementioned first type of reference signal, and may be applicable to high-speed moving scenarios and / or scenarios with large frequency deviation values.

[0313] Wherein, optionally, in each subframe occupied by the reference signal, the reference signal occupies at least four symbols, and there are two symbols in the at least four symbols, and the intersymbol interval between the two existing symbols is not greater than two symbols .

[0314] Among them, the reference signal occupies at least four symbols in each occupied subframe, which can ensure that the receiving device of the reference signal can obtain enough reference signal resources for frequency offset estimation, and can also ensure that the communication device moves at a high speed and the channel fades quickly. In serious cases, more reference signals can be obtained per unit time, so that the result of channel estimation based on the re...

Embodiment 3

[0384] In the third embodiment, the reference signal is mapped into a synchronous subframe. The synchronization subframe includes a synchronization signal, and the synchronization signal is used for synchronization between communication devices.

[0385] Here, the synchronous subframe takes the synchronous subframe in the current D2D system as an example. Wherein, PD2DSS is, SD2DSS is, in the subframe, the last symbol may be GAP, or the subframe does not include GAP. The reference signal takes DMRS as an example.

[0386] Figure 9A It shows the mapping manner of the current DMRS in the synchronous subframe of the D2D system. The DMRS occupies symbols 3 of the first time slot and the second time slot respectively. The symbols between the symbols occupied by the two DMRSs and the symbol 0 of the first time slot are used for sending PSBCH signals. Figure 9A The shown time-frequency resource occupies a subframe of 1 ms in the time domain, and occupies 6 PRBs in the frequenc...

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Abstract

The present application relates to the technical field of wireless communication, and in particular to a reference signal transmission device, method and system, which are used to ensure normal communication between communication devices as much as possible when there is a frequency deviation between communication devices. A sending device provided by the present application includes: a processing module, configured to generate a reference signal, and the reference signal is a first-type reference signal; a sending module, configured to send out the reference signal generated by the processing module; wherein, in the time domain , in each subframe occupied by the first type of reference signal, the first type of reference signal occupies at least five symbols, and there are two symbols in at least five symbols, and the inter-symbol interval between the two existing symbols is not greater than two symbol. The above design of the first type of reference signal can ensure that when the frequency deviation between the devices communicating with each other is large, the receiving device estimates the frequency deviation through the reference signal of the above design and makes corresponding corrections, thereby ensuring that the frequency deviation between the devices is relatively large. normal communication.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a reference signal transmission device, method and system. Background technique [0002] In a wireless communication system, a reference signal (Reference Signal, RS) is sent by a reference signal transmitting device to a reference signal receiving device, which can be used for channel estimation, signal demodulation, automatic gain control (Automatic GainControl, AGC), signal quality measurement, Positioning, as well as channel detection, positioning, etc., the receiving device of the reference signal knows the reference signal to be received in advance, so that the purpose of signal processing such as channel estimation of the receiving device can be achieved. [0003] In a wireless communication system, a prerequisite for normal communication between devices is that these devices are in a synchronized state. However, various reasons may lead to in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/26
Inventor 黎超赵振山
Owner HUAWEI TECH CO LTD
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