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Method, device and use for distributing pilot frequency channel time frequency source of multiple carrier communication system

A technology for multi-carrier communication and time-frequency resources, which is applied in the field of time-frequency resource allocation of pilot channels in multi-carrier communication systems, and can solve the problems of limited amount of available pilot pattern data, insufficient use of PN sequence autocorrelation and cross correlation, etc.

Active Publication Date: 2007-07-25
HUAWEI TECH CO LTD
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Problems solved by technology

[0027] This method of intercepting the PN sequence fragments that generate the pilot offset at a fixed position (every 13 bits) does not make full use of the autocorrelation and cross-correlation of the PN sequence, and the amount of usable pilot pattern data generated is limited

Method used

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  • Method, device and use for distributing pilot frequency channel time frequency source of multiple carrier communication system
  • Method, device and use for distributing pilot frequency channel time frequency source of multiple carrier communication system
  • Method, device and use for distributing pilot frequency channel time frequency source of multiple carrier communication system

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Embodiment Construction

[0086] The core of the present invention is to use the autocorrelation and cross-correlation characteristics of PN (pseudo-random sequence) sequence, and use a certain PN sequence to generate a group of mutually orthogonal sequences or intersection points by calculating it in a finite field. Sequences to form a sequence set, and use the sequences in the sequence set to generate a larger number of pilot patterns that are mutually orthogonal or have a limited number of intersection points, and assign each sequence in the sequence set to a different cell to generate a pilot channel time-frequency pattern, and assign the generated time-frequency pattern to different cells or users for time-frequency resource allocation of the pilot channel.

[0087] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0...

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Abstract

The method comprises: with a calculation in general finite field- GF (pm), one pseudo random sequence generates multi sequences in which there are multi orthogonal sequences composing a sequence set; each sequence in the sequence set generates a time-frequency pattern of pilot frequency channel; the generated time-frequency patterns are allocated to different cells, or the time-frequency resources of pilot frequency channel are allocated by users. By the invention, the interference of neighboring cells to the pilot frequency channel can be reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and application for allocating pilot channel time-frequency resources of a multi-carrier communication system. Background technique [0002] For communication systems with high data rates, coherent demodulation is usually used to obtain ideal receiving performance. The so-called coherent demodulation means that after the modulated signal is multiplied by the coherent carrier, the original signal is obtained after low-pass filtering. The implementation of coherent demodulation requires the receiver to know certain channel information, for example, the time domain or frequency domain response of the channel. To this end, it is necessary to perform channel estimation at the receiving end, and to identify the transmission characteristics of the channel in the time domain or frequency domain based on the received sequence that has been distorted in amp...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 曲秉玉范霄安李洋
Owner HUAWEI TECH CO LTD
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