Research Of The Interference Suppression Method Based On Cooperative Transmission In Wireless Heterogeneous Networks

With the widespread of using mobile broadband communications, as a method of increasing system capacity and data transferring rate, heterogeneous network deployment is considered the most promising future cellular network. However, the situation of the interference faced by heterogeneous networks is much more complex compared with the same network configuration, causing a serious impact on the system performance. Introducing coordinated multipoint transmission and reception techniques can improve system performance, reduce inter-cell interference, enhance data rates and coverage, and significantly increase the cell edge user throughput.In this paper, heterogeneous networks and multi-point collaboration technologies,interference suppression method for hot spot areas studied, mainly hybrid collaboration pre-coding and using of cooperative transmission interference coordination, from the time domain and frequency domain analysis and optimization improvements for the future network planning and optimization to provide a meaningful reference.This paper introduces new cooperative transmission to suppress interference in the heterogeneous network. In heterogeneous networks, two types of coordinated multiple point transmission(CoMP) technologies, joint processing and transmission(JPT) and coordinated scheduling and beamforming(CSB), were proposed. These technologies are intended for the latest cellular communication standard in order to improve the performance of cell-edge users who suffer from significant ICI. The advantage of CoMP-JP technology is that it can be combined with data transmission for all users, not only can eliminate inter-cell interference, but also effectively enhances the received signal energy deficiencies that collaboration all the user needs to share collaborative channel information and data information between the base station. CoMP-CB service has the advantage of single-cell base station calculates the user precoding, for eliminating inter-cell interference, the cooperating eNB only need to share channel information, inadequate in that the serving base station requires a larger transmission power. This paper presents a collaborative pre-coding method based on two mode hybrid. In order to take full advantage of the spectrum and power resources, aiming at cooperative transmission for each user to adapt the pre-coding.From the simulation results, the mixing of the proposed collaboration pre-coding system can support a higher spectrum efficiency, while edge user rate also further increased.Some spectrum utilization possible joint pre-coding is not high, the larger energy and other issues, propose a coordinated program based on collaboration interference resource block level, which makes use of heterogeneous network joint transport for heterogeneous networks using advantages in the premise of ensuring system average user throughput, and improve the throughput of the microcell, while improvingspectral efficiency of the system. The simulation proved that the average cell throughput, compared to other interference coordination scheme based on cooperative transmission interference coordination scheme has better performance gain.