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Shared frequency cell channel estimating apparatus and method

A technique for co-frequency cell and channel estimation, applied in the field of channel estimation, which can solve problems such as joint detection receiver performance degradation and affecting network performance

Active Publication Date: 2010-05-12
ST ERICSSON SEMICON BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the increase of co-frequency adjacent cell interference, the performance of the joint detection receiver of a single cell continues to decline, and the degree of co-frequency interference will directly affect network performance

Method used

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  • Shared frequency cell channel estimating apparatus and method
  • Shared frequency cell channel estimating apparatus and method
  • Shared frequency cell channel estimating apparatus and method

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Embodiment Construction

[0112] refer to figure 1 , the device for channel estimation of the same-frequency cell described in the embodiment of the present invention includes: a fast Fourier transform module 1, a sequencer 2 connected to the output of the fast Fourier transform module 1, and a sequencer 2 connected to the fast Fourier transform module 1 and the sequencer 2 The frequency domain interference canceller 3 connected to the output terminal.

[0113] Wherein, the fast Fourier transform module 1 is configured to perform fast Fourier transform on the Midamble sequence received by the terminal and the basic Midamble sequence of each intra-frequency cell and output the transformed sequence.

[0114] The sorter 2 is used to calculate the signal strength of each cell in the same-frequency cell according to the sequence output by the fast Fourier transform module 1, and sort each cell according to the signal strength;

[0115] The frequency domain interference canceller 3 is used to perform channe...

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Abstract

The invention discloses a channel estimating device and method for same-frequency villages, comprising the steps of: 1. calculating signal strength of each village in the same-frequency villages and arranging these villages according to the signal strength; 2. in a sequence of signal strengths from strong to weak, making interference cancellation on each village in a mode of combining fast Fouriertransform algorithm (FFT) with serial interference cancellation and thus completing channel estimation. And it can make accurate channel estimation for users in local and neighbouring villages in thesame-frequency villages.

Description

technical field [0001] The present invention relates to channel estimation technology, in particular to a device and method for channel estimation of co-frequency cells in a TD-SCDMA (TimeDivision-Synchronous Code Division Multiple Access) system. Background technique [0002] With the development of wireless communication technology and the global rise of 3G (third generation mobile communication), wireless resources, as a limited resource, are becoming more and more tense. For the TD-SCDMA system, one of the mainstream standards of 3G, the allocated radio resources are also very limited. In order to improve the spectrum utilization rate of the TD-SCDMA system, the same frequency networking has become an effective solution. However, while the same-frequency networking improves spectrum efficiency, it also brings about same-frequency interference. [0003] Co-channel interference refers to interference between users of different cells caused by neighboring cells of the sam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707H04B7/26H04J13/02H04L25/02H04L27/26
Inventor 董霄剑许百成
Owner ST ERICSSON SEMICON BEIJING