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Method for allocating time frequency resource of public pilot channels

A common pilot channel and time-frequency resource technology, applied in the field of time-frequency resource allocation, can solve problems such as network planning difficulties, and achieve the effects of easy planning, reduced difficulty, and low interference

Inactive Publication Date: 2010-12-08
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the number of different common pilot time-frequency patterns to choose from is relatively small, careful planning of common pilot time-frequency patterns is required during network planning, which will bring difficulties to network planning, especially in frequency Even worse with a reuse factor of one

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  • Method for allocating time frequency resource of public pilot channels
  • Method for allocating time frequency resource of public pilot channels
  • Method for allocating time frequency resource of public pilot channels

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Embodiment Construction

[0020] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

[0021] The present invention adopts the Reed-Solomon (RS, Reed-Solomon) code word to obtain the time-frequency pattern of the common pilot channel. In particular, a larger number of time-frequency patterns of common pilot channels can be obtained by slightly increasing the intersection points between time-frequency patterns of different common pilot channels.

[0022] In Stephen G. Wilson, "Digital modulation and coding", Prentice-Hall, Inc, 1996, it is defined that for q-element length n=q m The original Bosch-Chowhry-Hockingham (BCH) code of -1 is the RS code when m=1. Generally q is a power of a prime number. Let α be a primitive element on GF(q), the polynomial

[0023] g(D)=(D-α j )(D-α j+1 )…(D-α j+δ-2 )

[0024] is a po...

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Abstract

The invention discloses a method for allocating time frequency resource of public pilot channels, which comprises that: A, code words generated by the Reed Solomon code generate time frequency patternThe invention discloses a method for allocating time frequency resource of public pilot channels, which comprises that: A, code words generated by the Reed Solomon code generate time frequency patterns of more than one public pilot channel; and B, in each transmission time interval, the time frequency patterns of the public pilot channels are selected to allocate the time frequency resource of thes of more than one public pilot channel; and B, in each transmission time interval, the time frequency patterns of the public pilot channels are selected to allocate the time frequency resource of thepublic pilot channels. The method can reduce difficulty of network planning, and is particularly suitable for an OFDM system of which the frequency reuse factor is one. public pilot channels. The method can reduce difficulty of network planning, and is particularly suitable for an OFDM system of which the frequency reuse factor is one.

Description

technical field [0001] The invention relates to the time-frequency resource allocation technology of an Orthogonal Frequency Division Multiplexing (OFDM) system, in particular to a time-frequency resource allocation method of a common pilot channel of the OFDM system. Background technique [0002] A wireless communication system, such as a cellular wireless communication system, utilizes differences in geographical regions to realize frequency reuse by dividing geographically different communication regions, so as to increase the capacity of the wireless communication system. Each communication area in a wireless communication system may be referred to as a cell. When a simple frequency resource plan with a multiplexing factor of one is used, different cells use the same frequency, so signals of different cells working on the same frequency will interfere with each other. The time-frequency resources of the OFDM system are divided into several orthogonal narrowband sub-carr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04L27/26
Inventor 曲秉玉
Owner HUAWEI TECH CO LTD