5G fusion incoherent ranging method

Abstract

The invention discloses a 5G fusion incoherent ranging method. The method disclosed by the invention is high in ranging precision and can improve the comprehensive positioning precision. According to the technical scheme, under a 5G protocol framework, based on 5G system fusion incoherent ranging, a node A is set as a base station, a node B is set as a terminal, after the node A starts a measurement task once, a measurement time slot 1 is transmitted to the node B, the transmission moment tA, 1 is recorded, the node B receives the measurement time slot 1, OFDM fractional multiple symbol time offset estimation is carried out; and a moment tB, 2 is obtained when the node B receives the measurement time slot 1; transmitting a measurement time slot 2 to the node A by the node B, recording the transmission time tB and 3, receiving the measurement time slot 2 by the node A, and carrying out OFDM (Orthogonal Frequency Division Multiplexing) fractional-multiple symbol time offset estimation to obtain the time tA and 4 when the measurement time slot 2 is received by the node A; the node B transmits a measurement feedback time slot to the node A, and feeds back a difference value between a receiving moment and a transmitting moment; and after the node A receives the measurement feedback time slot, the distance between the node A and the node B is calculated by using an incoherent two-way distance measurement principle.

Description

technical field [0001] The invention belongs to the field of wireless communication, specifically relates to the application field of 5G fusion positioning technology, and is a non-coherent ranging method integrated with 5G. [0002] technical background [0003] The ranging system is divided into two types: coherent ranging and non-coherent ranging. In UAV measurement and control systems, coherent ranging technology is usually used. The principle of coherent ranging technology is simple, but it will bring some problems to the UAV measurement and control system. In a coherent ranging system, there is often a strict constraint relationship between the parameters of the uplink and downlink ranging signals, which makes the design of the system lose independence for the uplink and downlink ranging signals, and in some cases restricts the uplink and downlink data signals. The choice of system affects the application of advanced signal transmission technology with excellent perfor...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the absolute distance measurement between the terminal and the base station cannot be realized under the constraints of the existing 5G communication protocol, a 5G fusion non-coherent ranging method with high ranging accuracy and improved comprehensive positioning accuracy is proposed to solve the traditional One-way ranging cannot eliminate the measurement error problem caused by the clock skew of two communication nodes

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