Scene-based filtering method and self-adapting filter

A scene and filter coefficient technology, applied in the communication field, can solve problems affecting system performance and achieve good filtering effect

Active Publication Date: 2011-09-14
泰州市海通资产管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the above-mentioned filtering, the inventor found that in the prior art, the filter will not be adjusted after being selected, so once the communication system is in a different scene, the filtering effect of the filter may be good or bad, which has a great impact performance of the system

Method used

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Experimental program
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Embodiment 1

[0028] The scene-based filtering method provided by the embodiment of the present invention, such as figure 2 As shown, the method steps include:

[0029] S201. Determine the interference source and interference polarity of the current scene according to the user IQ data.

[0030] S202. Determine a filter coefficient applicable to the current scene according to the modulation mode of the user, the interference source and the interference polarity of the current scene.

[0031] S203. Adjust the filter according to the coefficient, and filter the user IQ data.

[0032] The scene-based filtering method provided by the embodiment of the present invention determines the interference source and interference polarity of the current scene according to the user IQ data; then determines the applicable filter coefficient for the current scene according to the user's modulation mode, the interference source and interference polarity of the current scene ; Then adjust the filter accordi...

Embodiment 2

[0034] The adaptive filter 30 provided by the embodiment of the present invention, such as image 3 shown, including:

[0035] The interference scene judging unit 301 is configured to determine the interference source and interference polarity of the current scene according to the user IQ data.

[0036] The coefficient selection unit 302 is configured to determine the filter coefficient applicable to the current scene according to the user's modulation mode, the interference source and the interference polarity of the current scene determined by the interference scene judgment unit 301 .

[0037] A low-pass filtering unit 303, configured to adjust the filter according to the coefficient determined by the coefficient selecting unit 302, and filter the user IQ data.

[0038] The adaptive filter provided by the embodiment of the present invention determines the interference source and interference polarity of the current scene according to the user IQ data; then determines the f...

Embodiment 3

[0048] Utilize above-mentioned embodiment two and appendix below image 3 , 4 The scene-based filtering method provided by the embodiment of the present invention is described.

[0049] Such as image 3 As shown, the user IQ data is divided into two parallel paths, one path is as in the prior art, and performs symmetrical low-pass filtering after deviation correction; the other path is input into the adaptive filter 30 provided by the embodiment of the present invention. In the adaptive filter 30, the interference scene judging unit 301 determines the interference source and interference polarity of the current scene according to the input user IQ data. Wherein, the interference source includes unilateral interference, bilateral interference and no interference; the interference polarity is used to indicate left adjacent channel interference or right adjacent channel interference in a unilateral interference scenario.

[0050] Specifically, such as Figure 4 , Figure 5 A...

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Abstract

The embodiment of the invention provides a scene-based filtering method and a self-adapting filter, which relate to the field of communication, can automatically adapt to different scenes and can achieve a good filtering effect in various scenes. The scene-based filtering method comprises the following steps of: determining an interference source and an interference polarity of a current scene according to the IQ (Intelligence Quotient) data of a user; determining a filtering coefficient suitable for the current scene according to a modulation mode of the user and the interference source and interference polarity of the current scene; and adjusting the filter according to the coefficient and filtering the IQ data of the user. The embodiment of the invention is used for filtering user data.

Description

technical field [0001] The invention relates to the communication field, in particular to a scene-based filtering method and an adaptive filter. Background technique [0002] Filters are a common method for filtering out passband interference, and are widely used in wireless communication systems. In the past baseband processing, for the same frequency, adjacent frequency and noise-limited scenarios, a filter with compromised performance was often selected to filter the IF signal. [0003] However, adjacent frequency scenarios require a narrower filter bandwidth to filter out interference signals; same-frequency and noise-limited scenarios require wider filter bandwidths to pass more signal energy for better performance. Therefore, choosing a filter with a compromise in performance often results in poor filtering effects for each scene. [0004] In the existing technology, such as figure 1 As shown, the filter only performs general low-pass filtering on the input IQ data ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02
Inventor 倪平平陈浩
Owner 泰州市海通资产管理有限公司
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