Research On Uplink Base Station Cooperative System Based On 3gpp Lte

In this paper, the cooperative mechanism and signal processing method in uplink of 3GPP LTE system is studied. They include the technology such as cooperative strategy, multi-user detection, optimal power allocation, maximizing throughput. Also, their performance is compared in this paper.In cellular systems with tight frequency reuse, one base station receives signals not only from users in local cell but also users with co-channel interference in nearby cell. I suggest a base station cooperative mechanism with successive interference cancellation receiver in this paper. It achieves a virtual distributive antennas system with BS-BS cooperation, so that it improves the performance of user on cell edge. An advantage is that this system do not need centre processing node compared to distributive antennas system.However, high backhaul traffic is required in above system. So, I suggest a successive interference cancellation method and a power allocation algorithm with low backhaul traffic. It in turn requires joint scheduling of the users onto resources so as to permit sequential processing of the passed on from one base station to another. Since detected quantized reliability information is transferred system enable better detection of the received data streams and required lower backhaul traffic. The total backhaul traffic is always less than joint detection for a few base stations in cooperation. The proposed strategies are to be used together with joint detection in a cellular network to minimize total backhaul traffic and achieve excellent performance regardless scenario and location of users.The power allocation algorithm applied to the cooperative system can achieve minimizing transmitted power with a set of target SINRs, maximizing throughput, and minimizing bit error rate with a constant transmitted power according to practical needs.