Method for eliminating interference by utilizing multi-antenna technology in microcellular system and apparatus thereof

Abstract

The invention provides a method for eliminating interference by utilizing multi-antenna technology in a microcellular system and an apparatus thereof. Through estimating orientation information of a mobile subscriber and a macrocellular base station and calculating a wave beam forming vector of a microcellular base station, according to a signal to interference and noise ratio level of the mobile subscriber, a power factor is determined, and through combination of the wave beam forming vector and the power factor, information sending is completed. By arranging a plurality of antennas on a microcellular base station terminal, by utilizing a transmit diversity effect of the antennas, good communication quality is provided for the mobile subscriber, a transmission rate of wireless communication is raised, by utilizing precoding technology and convenient power control technology to resist a fading influence of a channel, interference from the macrocellular base station is effectively inhibited, and a signal to interference and noise ratio level of a mobile subscriber terminal is raised.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for eliminating interference by using multi-antenna technology in a microcellular system. Background technique [0002] In order to meet the rapidly growing demand of mobile users for voice and data services, communication operators around the world have begun to deploy 3G networks, and China has also begun to deploy TD-SCDMA networks on a large scale. Compared with 2G technology, 3G technology has greatly improved the transmission rate, but because it works in the 2GHz frequency band, its wireless propagation characteristics, especially building penetration characteristics, are compared with those of GSM and IS-95 systems operating at 900MHz and 800MHz. Worse, after the 3G network is deployed, many indoor areas that can be covered by outdoor base stations in the original 2G system will become blind spots. Moreover, because 3G adopts CDMA technology, t...

AI Technical Summary

Problems solved by technology

Compared with 2G technology, 3G technology has greatly improved the transmission rate, but because it works in the 2GHz frequency band, its wireless propagation characteristics, especially building penetration characteristics, are compared with those of GSM and IS-95 systems operating at 900MHz and 800MHz. Worse, after the 3G network is deployed, many indoor areas that can be covered by outdoor base stations in the original 2G system will become blind spots

However, the method of adjusting the transmission power of the microcell base station has a certain computational complexity, and the adjustment process also takes a certain amount of time

[0006] Aiming at the serious degradation of signal-to-interference-noise ratio performance in the prior art when the strong interference from the macro cell affects the normal communication of the micro cell system, a method is designed to reduce the interference from the macro cell and effectively improve the communication quality and communication quality of the micro cell base station. A method and device for eliminating interference using multi-antenna technology in a microcellular system with a high transmission rate is one of the urgent problems to be solved in the field of communication technology

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