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Primary synchronization signal detection method in dynamic spectrum sharing

A main synchronization signal and dynamic spectrum technology, applied in the field of communication, can solve the problems of reduced detection rate and performance loss, and achieve the effect of reducing false detection or missed detection rate, avoiding detection inaccuracy, and ensuring accuracy

Active Publication Date: 2021-04-27
XIDIAN UNIV
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Problems solved by technology

This method realizes the PSS timing synchronization of the 5G system, but the detection rate will decrease when the signal-to-noise ratio is low, resulting in performance loss, and this method cannot be applied to the DSS signal to simultaneously detect the LTE primary synchronization signal and the 5G primary synchronization signal

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  • Primary synchronization signal detection method in dynamic spectrum sharing
  • Primary synchronization signal detection method in dynamic spectrum sharing
  • Primary synchronization signal detection method in dynamic spectrum sharing

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Embodiment Construction

[0034] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] refer to figure 1 , this example is a method for simultaneously detecting the LTE primary synchronization signal and the 5G primary synchronization signal under the dynamic spectrum sharing scheme. The implementation steps are as follows:

[0036] Step 1. Obtain the down-sampled DSS signal.

[0037] The downsampling process is equivalent to compression, which can describe the entire process of bandwidth filtering and sampling rate reduction. Downsampling will bring about the loss of SNR. It is inevitable that when the downsampling multiple increases, the features of the original DSS signal retained will also decrease. The lower DSS signal features will affect the detection performance. Therefore, the downsampling multiple needs to be selected reasonably. In the example, the downsampling factor is selected as 16 times. If the signal-to-noise rat...

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Abstract

The invention discloses a primary synchronization signal detection method in dynamic spectrum sharing, and mainly solves the problem that LTE and 5G primary synchronization signals cannot be detected at the same time in the prior art. According to the implementation scheme, a user side carries out down-sampling on a DSS signal and carries out first-order difference processing on a down-sampled signal; sliding detection is performed on the first-order differential signal to obtain a 5G SSB signal autocorrelation and PSS and SSS mirror symmetry correlation value and an LTE PSS signal autocorrelation and mirror symmetry correlation value, and a coarse synchronization point of the 5G PSS and the LTE PSS is calculated; and cross-correlation is performed on a local time domain sequence and a DSS signal in an adjacent interval of the coarse synchronization point to obtain fine synchronization points and integer frequency offset of the 5G PSS and the LTE PSS. According to the method, the LTE and 5G primary synchronization signals can be detected at the same time, the robustness to noise and frequency offset is high, and the method can be used for detecting the LTE and 5G primary synchronization signals in the dynamic spectrum sharing technology.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for detecting a main synchronization signal. It can be used for the detection of LTE and 5G primary synchronization signals in dynamic spectrum sharing technology. Background technique [0002] At this stage, 5G is being deployed successively around the world. The 5G communication system deployed in the first phase works in the FR1 frequency band, which is lower than 6GHz, and will inevitably share the frequency band with the LTE communication system. The dynamic spectrum sharing technology DSS allows the idle spectrum of LTE to be shared with 5G through rate matching or multimedia broadcast multicast single frequency network (MBSFN) subframes, etc., and dynamically allocates spectrum resources between LTE and 5G according to traffic requirements to realize the sharing of spectrum resources. best use. [0003] After dynamic spectrum sharing is impleme...

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Application Information

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IPC IPC(8): H04W16/14H04J11/00
CPCH04W16/14H04J11/0069H04J2011/0096Y02D30/70
Inventor 李晓辉王先文石明利刘帅帅
Owner XIDIAN UNIV