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Wireless communication device for time synchronization in a wireless communication network and method therein

A technology of wireless communication equipment and wireless communication network, applied in channel estimation, digital transmission system, baseband system components and other directions, can solve the problems of high timing precision calculation complexity, time synchronization solution cannot use mobile communication network, etc. The effect of improved performance, high timing accuracy, and low computational complexity

Inactive Publication Date: 2021-03-26
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, existing time synchronization solutions in 3G LTE networks cannot be used in next generation mobile communication networks
Furthermore, achieving both high timing accuracy and low computational complexity is not possible in state-of-the-art solutions

Method used

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  • Wireless communication device for time synchronization in a wireless communication network and method therein
  • Wireless communication device for time synchronization in a wireless communication network and method therein
  • Wireless communication device for time synchronization in a wireless communication network and method therein

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Embodiment Construction

[0022] In the following description, the term UE is often used to refer to a wireless communication device, so the two terms may be used interchangeably herein. As part of the explanation of the embodiments herein, some issues will first be identified and discussed with reference to prior art solutions for time synchronization.

[0023] figure 1 The time synchronization procedure performed by the UE according to the prior art when using CRS is shown. As mentioned above, the first stage of time synchronization is to acquire symbol timing by detecting PSS. The UE has to detect the PSS without any prior knowledge of the channel, so for PSS timing detection an incoherent correlation is performed in the time domain to find the timing offset m* corresponding to the maximum correlation M ,which is,

[0024]

[0025] where i is the time index, m is the timing offset, N is the length of the PSS time domain signal, y[i] is the received signal at time i in the time domain, s M [i]...

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Abstract

A wireless communication device and method therein are disclosed for time synchronization in a wireless communication network. The wireless communication device determines the first timing (tc) by performing coarse time synchronization based on a synchronization signal received by the wireless communication device, wherein the received synchronization signal is sampled at an original sampling rate or a reduced sampling rate. The wireless communication device determines the second timing (tf) by performing fine time synchronization based on the determined first timing (tc) and the received synchronization signal.

Description

technical field [0001] Embodiments herein relate to wireless communication devices and methods therein. In particular, they relate to performing both coarse and fine time synchronization in wireless communication devices based on proprietary synchronization signals in the wireless communication network. Background technique [0002] A wireless communication device such as User Equipment (UE) is also known as eg a wireless terminal, mobile terminal and / or mobile station. The UE can perform wireless communication or operate in a wireless communication environment including multiple mobile communication networks, such as second / third generation (2G / 3G) networks, 3G long-term evolution (LTE) networks, etc. In the cellular communication network. In these communication networks, a cell search procedure consisting of a series of synchronization phases is usually performed in the UE, through which the UE determines to demodulate the downlink (DL) signal received from the network n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
CPCH04L25/0204H04L25/0212H04L25/022H04L27/2663H04L27/2665H04L27/2675H04L27/2695H04L27/2659H04L27/266
Inventor 王亥李韶华汪剑锋郑艳利
Owner TELEFON AB LM ERICSSON (PUBL)