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Iterative interference cancellation machine and iterative interference cancellation method based on data updating

A technology of iterative interference cancellation and data update, applied in the iterative interference cancellation machine and the field of cancellation, it can solve the problems of data transmission rate drop, call drop, voice quality degradation, etc.

Inactive Publication Date: 2017-03-08
LEADCORE TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Co-channel interference is the main factor affecting the performance of GGE reception. CCI will cause a series of problems such as voice quality degradation, data transmission rate decrease, and call drop.
However, considering the channel reuse of adjacent cells, the existence of CCI in the actual environment is inevitable

Method used

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  • Iterative interference cancellation machine and iterative interference cancellation method based on data updating
  • Iterative interference cancellation machine and iterative interference cancellation method based on data updating
  • Iterative interference cancellation machine and iterative interference cancellation method based on data updating

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Embodiment Construction

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0045] The iterative interference elimination machine based on data update provided by the present invention is as figure 1 As shown, the following modules are included:

[0046] Sampling module 10, is used for carrying out UpSample / 2 times down-sampling to the received data;

[0047] The shunt module 20 is used to serial-parallel convert and shunt the down-sampled data to form two-way sample data;

[0048] Preferably, it also includes a derotation module 30, which is connected after the splitting module 20, ...

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Abstract

The invention provides an iterative interference cancellation machine based on data updating, wherein UpSample / 2 double-decreasing sampling of received data, channel impact response estimation of an expectation user, calculation of a linear filter coefficient, a linear filter for performing interference suppression of the received data, a nonlinear equalizer for cancelling inter-symbol interference, self-adaptive LMS channel estimation and the like can be realized. The invention further provides an iterative interference cancellation method based on data updating. On the basis of nonlinear equalization, the whole performance of a link can be greatly improved through filtering operation and LMS channel estimation based on whole burst data; particularly, in an asynchronous interference condition, iteration for many times can be adopted according to a practical condition, so that the ideal performance is achieved; and the iterative interference cancellation machine and the iterative interference cancellation method based on data updating provided by the invention are suitable for expected signals in different modulation modes and interference types.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an iterative interference elimination machine and elimination method based on data update. Background technique [0002] In a wireless communication system, reducing the cell reuse factor increases the frequency resource reuse times to improve the system's bearable capacity. But at the same time, the distance between the corresponding same-frequency cells will be relatively reduced, and the interference from the same frequency channel of adjacent cells will be intensified. This interference is called co-channel interference (CCI, co-channel interference). [0003] Co-channel interference is the main factor affecting GGE reception performance, and CCI will cause a series of problems such as voice quality degradation, data transmission rate decrease, and call drop. However, considering the channel reuse of neighboring cells, the existence of CCI is inev...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04L25/02
Inventor 祁卿峰周小林王紫鹏毕伟祥
Owner LEADCORE TECH
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