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Positioning reference signals

一种定位参考信号、符号的技术，应用在计算机程序产品,发射节点,检测此通信系统中的定时值领域，能够解决功率放大器大功率回退等问题，达到良好互相关特性、良好自相关特性的效果

Inactive Publication Date: 2012-01-25
HUAWEI TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0033] Additionally, these prior art solutions have high peak-to-average power ratio (PAPR) for PRS
For the two described prior art time-frequency patterns, the PAPR of the PRS in a 20MHz bandwidth is 20.9dB and 23.2dB, respectively, which is a problematic PAPR that requires a larger power amplifier in the power amplifier used to transmit the PRS Power back off

Method used

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Embodiment Construction

[0084] The invention can be used in multi-user OFDM based transmission systems for high speed downlink shared channels in cellular systems as well as other multi-carrier systems.

[0085] In some wireless communication systems, such as LTE, reference signals define so-called antenna ports in a cell. Multiple orthogonal antenna ports may be used in a cell and transmitted on multiple physical transmit antennas.

[0086] In the following discussion, we consider one (1) antenna port for the positioning function. However, the present invention is not limited thereto, and can be extended to multiple antenna ports for positioning by those skilled in the art.

[0087] According to the present invention, when a PRS is generated, the time-frequency pattern that determines the REs that will be used to transmit the PRS will also be determined. A time-frequency pattern typically occupies several OFDM symbols. Within each of these OFDM symbols, the REs of the time-frequency pattern that ...

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Abstract

An improved generation and use of Positioning Reference Signals (PRS) are disclosed. The method generates PRS to be used in a wireless Orthogonal Frequency Division Multiplexing (OFDM) communication system. According to the invention, the method includes the steps of : - determining a time-frequency pattern of Resource Elements (REs) to be used for transmitting the PRS, wherein the time- frequency pattern includes at least two OFDM symbols, and - assigning, for each one of the at least two OFDM symbols, respectively, a value to each one of a number of the REs being within that OFDM symbol, wherein - the values being assigned to the number of REs correspond to elements in a modulation sequence having a length being equal to the number of REs, and are to be used for modulating OFDM subcarriers corresponding to the REs within that OFDM symbol.

Description

technical field [0001] The invention relates to a method as defined in the preamble of claim 1 for generating a positioning reference signal for use in a wireless Orthogonal Frequency Division Multiplexing (OFDM) communication system. [0002] The invention also relates to a method of a receiving node as defined in the preamble of claim 18 for detecting timing values ​​in such a communication system. [0003] The invention also relates to a method for transmitting a PRS, a computer program and a computer program product implementing the method of the invention. [0004] The invention also relates to an entity as defined in the preamble of claim 24 configured for generating a PRS for use in such a communication system, and to a transmitting node as defined in the preamble of claim 25 . [0005] The invention also relates to a receiving node as defined in the preamble of claim 26 configured to detect timing values ​​for determining its position in this communication system. B...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2613H04L5/005G01S5/0226H04L5/0023H04L5/0053G01S1/20H04L27/26
Inventor 布兰尼斯拉夫·波波维奇弗雷迪克·伯格恩
Owner HUAWEI TECH CO LTD
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