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Method for reducing pilot sequence collision based on wideband single carrier system

A technology of pilot sequence and single carrier, applied in the field of reducing pilot sequence collision based on broadband single carrier system, can solve problems such as pilot sequence collision and system performance degradation, reduce the possibility of mutual interference, improve system performance, reduce The effect of collision probability

Inactive Publication Date: 2013-01-16
ZTE CORP
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Problems solved by technology

In this way, in a synchronous system, when all pilot signals are sent on the fixed DFT-s-OFDM symbols in the uplink subframe, the pilot sequences are prone to collision, resulting in system performance degradation

Method used

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  • Method for reducing pilot sequence collision based on wideband single carrier system
  • Method for reducing pilot sequence collision based on wideband single carrier system
  • Method for reducing pilot sequence collision based on wideband single carrier system

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Embodiment Construction

[0020] For ease of description, the present invention refers to the DFT-s-OFDM symbols that transmit pilot signals as pilot symbols. The DFT-s-OFDM symbols in a time slot are numbered, and this number is called a time domain number. The time-domain number of the pilot symbol is the time-domain number of the DFT-s-OFDM symbol that sends the pilot signal.

[0021] The core idea of ​​the present invention is: based on the broadband single-carrier system, the user equipment UE (User Equipment) in the same cell determines the time domain number of its uplink pilot symbol according to the ID number (Identification) in the cell group of the cell where it is currently located, And at the same time, in the same cell group, the ID number in the cell group of each cell has a single mapping relationship with the time domain number of the corresponding pilot symbol, so that the time domain numbers of the uplink pilot symbols corresponding to different cells in the same cell group are diffe...

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Abstract

The invention provides a method for reducing collision of pilot sequences based on broadband singe-carrier system. In the method, UEs (User Equipment) in the same cell determine the time domain number of an uplink pilot symbol thereof according to an in-group ID (Identification) number of the current cell, wherein the in-group ID number of each cell has single mapping relationship with the time domain number of the corresponding pilot symbol at the same time and in the same cell group, thereby effectively reducing the possibility of collision of pilot sequences of neighboring cells and improving the system performance. In addition, the numbering of the time domain of the uplink pilot symbol jumps with the time, which can further achieve interference randomization.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a method for reducing pilot sequence collisions based on a broadband single-carrier system. Background technique [0002] Orthogonal Frequency Division Multiple Access (OFDMA) technology is one of the main candidates for future wireless communication technologies. This scheme allocates several different subcarriers to different users, and these subcarriers are allowed to overlap in the frequency domain but always keep mutual orthogonality. One of the main disadvantages of OFDMA is that it has a large peak-to-average ratio, which will lead to a decrease in power amplifier efficiency. In order to overcome this shortcoming and at the same time inherit the advantages of OFDMA, 3GPP LTE (Long Term Evolution) uplink adopts a single-carrier technique-Orthogonal Frequency Division Multiple Access based on Discrete Fourier Transform (DFT) Division Multiple Access (DFT-s-OFDMA) techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04J11/00
Inventor 夏树强梁春丽杨扬
Owner ZTE CORP
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