Interference process of interference signal

Abstract

This invention relates to wireless signal process, and discloses a method for interference process of an interference signal in an OFDM based wireless communication system, comprising: receiving an interference signal; performing time domain and frequency domain analyses on the interference signal to obtain interference characteristics of the interference signal; determining an interference category of the interference signal according to the interference characteristics of the interference signal; and performing interference process on the interference signal in view of the interference category of the interference signal. The method for interference signal process of this invention is effective to both homogeneous network interference and heterogeneous network interference, so that frequency spectrum sharing of homogeneous networks and existing heterogeneous networks can be realized.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority under 35 U.S.C. §119 from Chinese Patent Application No. 201210224782.8 filed Jun. 29, 2012, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to wireless signal process, and more specifically, to a method and device for interference process of an interference signal.[0004]2. Description of the Related Art[0005]Currently, wireless networks have gained wide applications, accompanied by interference between different wireless networks. In terms of mechanisms of forming interference, interference is commonly divided into homogeneous wireless network interference and heterogeneous wireless network interference. For example, interference between cells of GSM, CDMA and other cell mobile communication networks is homogeneous wireless network interference. Because the use of official licensed frequency band...

AI Technical Summary

Benefits of technology

The patent describes a way to handle interference between different networks. It can work for both homogeneous and heterogeneous networks, which means that different networks can share the same spectrum. This allows for more efficient use of frequency spectrum and improves overall network performance.

Problems solved by technology

Currently, wireless networks have gained wide applications, accompanied by interference between different wireless networks.

For example, interference between cells of GSM, CDMA and other cell mobile communication networks is homogeneous wireless network interference.

However, as to interference in heterogeneous wireless networks, it shows significant diversity and complexity, for example, interference between various systems of wireless devices in some ISM frequency bands, or interference between new and obsolete devices in wireless network upgrading.

Because it is hard to identify interference sources, formats, and characteristics, its interference process methods become relatively complicated.

Existing interference process solutions for heterogeneous wireless networks are not satisfying in terms of their implementation and effects.

However, such a solution needs multi-antenna equipments provided on receivers and involves complex signal process operations, having great difficulty in implementation and relatively higher cost, and thus, commonly adopted in military wireless communication systems.

Besides, energy measurement solutions are widely used in networks, such as WiFi, WSN, etc, which are easier to implement, however, those solutions always adopt avoidance when interference is detected, as a result, they are unable to coexist with other systems, leading to lower frequency spectrum utilization, particularly, when there are larger amount of nodes, which may cause rapid degradation of total throughput.

Especially, in the use of scheduled wideband wireless communication systems having higher spectrum efficiency, such as WiMAX, LET systems, how to share frequency spectrum with existing heterogeneous wireless communication systems is still an unsolved problem.

Furthermore, because heterogeneous wireless networks of different systems have entirely different formats and characteristics, it is difficult to find out a uniform and effective manner suitable to all kinds of interference.

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