nprach signal detection method, device, nprach receiver and storage medium

A signal detection and signal value technology, applied in the direction of synchronization devices, wireless communications, electrical components, etc., can solve the problems of inability to effectively estimate TA value and increase the difficulty

Active Publication Date: 2020-10-09
SUN YAT SEN UNIV
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Problems solved by technology

Specifically, when the UE introduces RCFO due to factors such as Doppler frequency shift or time-frequency synchronization error, the difficulty of TA estimation will be greatly improved; generally speaking, if the receiver signal detection method does not consider correcting RCFO, it cannot effectively estimate Find the best TA value

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  • nprach signal detection method, device, nprach receiver and storage medium

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0049] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiment...

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Abstract

The invention relates to an NPRACH signal detection method and a device, an NPRACH receiver and a storage medium. The method comprises the following steps: acquiring a check matrix model of a terminalsignal in an NPRACH; wherein the test matrix model comprises an RCFO variable and a TA variable; carrying out eigenvalue decomposition on the test matrix model to obtain a maximum eigenvalue of the test matrix model as a test metric value; comparing the test metric value with a detection threshold value; if the test metric value is not less than the detection threshold, determining that a terminal signal exists in the NPRACH, and calculating a feature vector corresponding to the test metric value as a basic vector; constructing a signal value optimization model according to the basic vector;and solving the signal value optimization model, when the maximum value of the target function is obtained, obtaining the value of a parameter variable in the signal value optimization model, and determining the optimal detection value of the terminal signal in the NPRACH according to the value of the parameter variable. The method is reasonable in complexity, can quickly and accurately estimate the RCFO and TA in the signal, and is good in NPRACH signal detection effect.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to an NPRACH signal detection method, device, NPRACH receiver and storage medium. Background technique [0002] The Internet of Things (IoT) is an information carrier such as the Internet and traditional telecommunication networks, which enables all ordinary objects that can perform independent functions to realize interconnection and intercommunication. Narrow Band Internet of Things (NB-IoT) is an important branch of the Internet of Everything. NB-IoT is built on a cellular network and only consumes 180KHz of bandwidth. It can be directly deployed on a GSM network, UMTS network or LTE network to reduce deployment costs and achieve smooth upgrades. [0003] In the NB-IoT system, when the terminal (user equipment, UE) needs to establish or restore the air interface connection with the base station (E-NodeB, eNB), it first completes the time-frequency sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W74/08
CPCH04W56/00H04W74/0833
Inventor 吴啟明伍沛然夏明华
Owner SUN YAT SEN UNIV
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