Up pilot method for restraining interference

A technology for suppressing interference and pilot sequences, applied in multi-frequency code systems, baseband system components, etc., can solve problems such as inter-cell interference, low user throughput, and low channel estimation accuracy of cell edge users, and improve throughput , Improve channel estimation accuracy, and suppress mutual interference

Active Publication Date: 2006-10-25
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0022] The purpose of the present invention is to provide a method that can overcome the defects of inter-cell interference, low channel estimation accuracy of cell edge users, and small user throughput in the prior art.

Method used

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  • Up pilot method for restraining interference
  • Up pilot method for restraining interference
  • Up pilot method for restraining interference

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Embodiment Construction

[0044] The basic principle of the present invention is as Figure 7 shown, including the following steps:

[0045] In step s101, a specific scrambling code group is assigned to each cell as a pilot, and the scrambling code group is actually a series of combinations including code sequences of different lengths. Because in the uplink single-carrier system, the same bandwidth can be multiplexed to different numbers of users, and the pilot lengths required by the corresponding users are also different, so the scrambling code group includes code sequences of various lengths corresponding to the pilots.

[0046] Step s102, each user dynamically selects a code sequence in the scrambling code group of the cell where it is located as the basic pilot according to the number of multiplexed users. A code sequence; the number of users in a cell changes at any time, so it is necessary to select a code sequence from the scrambling code group according to the number of users who multiplex t...

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Abstract

The method assigns a specific scrambling group as pilot frequency for each sub zone. Based on multiplexing number of users, each user selects a code sequence in scrambling group of sub zone the user locates in as basic pilot frequency dynamically. Using multiplexing mode of basic pilot in frequency domain obtains sequence of pilot frequency of the user. The invention realizes orthogonal pilot frequencies of users in sub zone in frequency domain, and smaller correlativity of pilot frequency between sub zones so as to restrain mutual interference of users' pilot frequencies inside sub zone and between sub zones, raise precision for estimating channel, and improving throughput of users at border area of sub zone.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to an uplink pilot method for suppressing interference. Background technique [0002] With its unique advantages of flexibility and convenience, mobile communication meets people's requirements for communication technology in modern society, and has become the fastest-growing communication method since the mid-1980s. Among them, the improvement of communication quality is one of the important tasks of current mobile communication. In the wireless environment, multipath fading, as a kind of channel fading, is one of the main factors affecting communication quality. In order to eliminate the influence of channel fading on signals, it is necessary In the receiver, the channel information obtained by the channel estimation is used to compensate the distortion of the signal, so the channel estimation is a very important component in the mobile communication system. The channel estima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 李化加刘云
Owner HUAWEI TECH CO LTD
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