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A method and device for detecting sidelink synchronization signals in d2d

A technology for synchronizing signals and symbols, applied in the field of communication, can solve problems such as performance impact, SSSS symbol power back-off, etc., and achieve the effect of improving detection performance

Active Publication Date: 2020-05-19
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the SSSS design does not use the same design method as LTE, the SSSS symbols and PSSS symbols are far apart, and the channel estimation of PSSS symbols cannot be used for coherent detection to obtain better performance; only non-coherent detection methods can be used
SSSS non-coherent detection is sensitive to timing, frequency offset and coherent bandwidth, etc., and direct detection will greatly affect the performance
Further, in order to reduce the peak-to-average ratio PAPR, SSSS symbols have power backoff relative to PSSS symbols, and SSSS detection will be more challenging

Method used

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  • A method and device for detecting sidelink synchronization signals in d2d
  • A method and device for detecting sidelink synchronization signals in d2d
  • A method and device for detecting sidelink synchronization signals in d2d

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Embodiment 1

[0040] Embodiment 1 of the present invention provides a method for detecting auxiliary sidelink synchronization signals in D2D, such as figure 2 As shown, the method includes:

[0041] S201. Obtain the PSSS symbol of the primary sidelink synchronization signal and the SSSS symbol of the secondary sidelink synchronization signal;

[0042] When the source user equipment and the target user equipment perform D2D communication, the time-frequency synchronization between the transmitting and receiving ends is first performed. After one end receives the D2D synchronization signal, it acts as a detection terminal to analyze the D2D synchronization signal to obtain the PSSS symbol and SSSS carried in the D2D synchronization signal. symbols; wherein, PSSS symbols are PSSS time domain symbols, and SSSS symbols are SSSS time domain symbols.

[0043] Here, the detection terminal of the received D2D synchronization signal may be located outside the coverage area, or may be located within...

Embodiment 2

[0065] In the embodiment of the present invention, the method for detecting the SL-ID in the process of SSSS in D2D is described, as follows image 3 As shown, the method includes:

[0066] S301. Estimating the channel impulse response from the acquired PSSS symbols to obtain precise timing offset information of the SSSS symbols;

[0067] S302. Obtain the SL-ID by performing correlation detection on the SSSS symbols whose timing is adjusted for the SSSS symbols.

[0068] Here, for the detection terminal, regardless of whether the detection terminal belongs to the coverage area or outside the coverage area, the precise timing offset information of the SSSS is obtained by estimating the channel impulse response of the PSSS. After obtaining the precise timing offset information, the precise timing offset information is used for The acquired SSSS symbols are adjusted with precise timing to obtain the adjusted SSSS symbols, and the SL-ID can be determined by performing correlation...

Embodiment 3

[0071] In the embodiment of the present invention, the method for detecting SSSS in D2D provided by the embodiment of the present invention is further described by taking the specific application scenario of detecting that the terminal is located outside the coverage area. In this case, the processing steps of SSSS detection are as follows: Figure 4 shown, including:

[0072] S401. Estimating the channel impulse response by using the acquired PSSS symbols to obtain precise timing of the SSSS symbols, PSSS sequence detection values, and integer multiple frequency offset information. Specifically include:

[0073] (1) Obtain the PSSS symbol;

[0074] Here, before performing channel impulse response estimation on the PSSS symbols, the PSSS symbols are obtained first. The acquired PSSS symbols are PSSS signals that have undergone coarse timing adjustment and fractional offset compensation. The coarse timing and fractional frequency offset information can be provided by a front-...

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PUM

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Abstract

A method of determining a secondary sidelink synchronization signal in D2D. The method comprises: acquiring a primary sidelink synchronization signal (PSSS) symbol and a secondary sidelink synchronization signal (SSSS) symbol; performing an impulse response estimation on the PSSS symbol to obtain adjustment information of the SSSS symbol; adjusting, according to the adjustment information, the SSSS symbol to obtain an accurate SSSS symbol; and obtaining, by determining the accurate SSSS symbol, a sidelink identification (SL-ID) of an SSSS. The embodiments of the invention further provide a device for determining a sidelink synchronization signal in D2D, and a computer storage medium.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for detecting a sidelink synchronization signal in D2D. Background technique [0002] With the rapid development of mobile communication, there are limitations in the communication mode of the traditional cellular network system centered on the base station, and the device-to-device (Device-to-Device, D2D) communication mode has attracted more and more attention. The so-called D2D means that the service data is not forwarded by the base station, but is directly transmitted from the source user equipment to the target user equipment through the air interface. This communication mode is different from the traditional cellular system communication mode. D2D technology has a short link distance and high channel quality, which can meet the information sharing business between adjacent users and provide high-speed, low-latency, and low-power transmission services. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/02H04W56/00
CPCH04W28/0215H04W56/0035H04W28/02H04W56/00
Inventor 易立强李焱
Owner SANECHIPS TECH CO LTD