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

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...

AI Technical Summary

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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