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Method and device for determining phase difference

A determination method and phase difference technology, applied in the field of communications, can solve problems such as phase difference judgment errors

Active Publication Date: 2013-02-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] An embodiment of the present invention provides a method for determining a phase difference, which is used to solve the problem of misjudgment of the phase difference when the frequency deviation is large in the existing frequency deviation method. The method includes:

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  • Method and device for determining phase difference
  • Method and device for determining phase difference
  • Method and device for determining phase difference

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Embodiment Construction

[0027] In order to solve the problem mentioned in the prior art that the Doppler frequency offset on the base station side can be up to twice the actual frequency offset, and a large frequency offset is likely to cause phase difference judgment errors, a more improved anti-frequency offset performance on the base station side is proposed. High requirements and high difficulty in implementation, the embodiment of the present invention provides a phase difference determination method, the specific processing flow is as follows figure 1 shown, including:

[0028] Step 101, receiving a data message sent by a terminal, wherein the data message includes a first pilot sequence and a second pilot sequence adjacent in time sequence;

[0029] Step 102, determining a first phase difference between the first pilot sequence and the second pilot sequence;

[0030] Step 103, in the set phase difference range, search for one or more second phase differences that are different from the first ...

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Abstract

The invention discloses a method for determining a phase difference. The method comprises the following steps: receiving data messages sent by a terminal, wherein the data messages comprise a first pilot sequence and a second pilot sequence with adjacent time sequences; determining a first phase difference between the first pilot sequence and the second pilot sequence; searching for one or more second phase differences having a difference of an integral multiple of 2*Pi with the first phase difference within the given ranged of the phase difference; and verifying one or more second phase differences to determine the successfully-verified phase difference. The invention further discloses a device for determining the phase difference. The invention can solve the problem that the phase difference is misjudged in the large frequency offset by the existing frequency-offset method.

Description

technical field [0001] The present invention relates to the communication field, in particular to a phase difference determination method and a phase difference determination device. Background technique [0002] With the rapid development of transmission methods such as high-speed railways and highways, the speed of trains running on them can be increased to 200-250km per hour, and the maximum speed of maglev trains can reach 430km per hour. The high-speed traffic has brought challenges to the coverage of high-speed mobile communication scenarios. The rapid development of high-speed railways has become a new hot spot for mobile voice and data services. The 3GPP agreement clearly states that an LTE (Long Term Evolution, long-term evolution) system is required to support a mobile rate of up to 500 km / h. [0003] When the train is running on the high-speed railway, the Doppler frequency offset caused by the movement of the train will affect the received data, causing the phas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04B1/7075
Inventor 殷玮玮
Owner ZTE CORP