Velocity Estimation Method and Device

A speed estimation and speed technology, applied in the field of communication, can solve the problem that HetNet cannot meet the accuracy of moving speed estimation

Active Publication Date: 2017-12-29
HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

At present, the methods for speed estimation mainly include: the Level Crossing Rate (LCR for short) method and the autocorrelation method by counting the number of times the signal crosses a predetermined level, but these two speed estimation methods cannot meet the needs of HetNet for mobile Speed ​​Estimation Accuracy Requirements

Method used

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  • Velocity Estimation Method and Device
  • Velocity Estimation Method and Device

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Embodiment Construction

[0060] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0061] figure 1 It is a flowchart of a speed estimation method provided by an embodiment of the present invention. Such as figure 1 As shown, the method of the present embodiment includes:

[0062] Step 101: Perform multipath reception on the symbols sent by the terminal device in each time slot within a preset speed estimation time.

[0063] Step 102, perf...

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Abstract

A speed estimation method and device. The method comprises: during a speed estimation period, performing multi-path receiving on symbols sent by a terminal device in each time slot; performing channel estimation on the received symbols to obtain a fading factor on each path in each time slot; performing self-correlation processing on the fading factor on each path in each time slot, and performing correlation processing with a cross-correlation interval of at least 2, to obtain a fading factor self-correlation value and a fading factor cross-correlation value in the speed estimation period; and estimating a moving speed of the terminal device according to the obtained fading factor cross-correlation value and the fading factor self-correlation value. By means of the technical solution of the present invention, estimation precision of the moving speed of the terminal device can be improved, and a requirement of providing user hierarchies by a heterogeneous network (HetNet) according to the moving speed is satisfied.

Description

technical field [0001] The present invention relates to communication technology, in particular to a speed estimation method and device. Background technique [0002] With the wide application of mobile communication networks, users have higher and higher requirements for seamless network coverage. Since dense and tall buildings in urban areas will form more signal blind spots, in order to improve the service quality when users are in signal blind spots, micro stations or pico stations are usually deployed in signal blind spots to supplement macro stations to improve user services. quality. [0003] In a heterogeneous network (HetNet for short), due to the movement of the user's location, the user will frequently switch between the macro station and the micro station, and frequent switching will increase the probability of the user dropping calls and links. It also increases the signaling load on the network. Therefore, in HetNet, it is hoped that users can be stratified ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/08
CPCH04W64/006
Inventor 李乐亭谭成群
Owner HUAWEI TECH CO LTD
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