Shared frequency cell channel estimating apparatus and method

A technology for co-frequency cell and channel estimation, which is applied in the field of channel estimation and can solve problems such as affecting network performance and degrading the performance of joint detection receivers.

Active Publication Date: 2007-01-31
ST ERICSSON SEMICON BEIJING
View PDF1 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increase of co-frequency adjacent cell interference, the performance of the joint detection receiver of a s

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Shared frequency cell channel estimating apparatus and method
  • Shared frequency cell channel estimating apparatus and method
  • Shared frequency cell channel estimating apparatus and method

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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 Fourier transform 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 the same-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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B1/707H04B7/26H04J13/02H04L25/02H04L27/26
Inventor 董霄剑许百成
Owner ST ERICSSON SEMICON BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap