深圳平安金融中心外挂式塔式起重机支承系统设计

Research on optimal SER for decode-forward cooperative communication systems

深圳平安金融中心塔楼施工,4台重型动臂式塔式起重机均外挂布置于核心筒外侧并实现自爬升。重点介绍了外挂式塔式起重机支承系统的结构及构造设计思路,评估了支承系统与核心筒之间的优化布置。分析了塔式起重机与支承系统之间的相互作用,总结出影响塔式起重机支承系统荷载工况的3个主要因素：塔式起重机爬升高度、工作状态、塔臂方位。

For wireless communications system, cooperative relaying technique can improve system＇s symbol-error-rate（SER） performance efficiently. This paper analyzed cooperative communication system with single DF relay and a cosed-form SER formulation and corresponding upper bound was derived by making use of a simple linear topology .The optimum power allocation and relay location were derived, which was aimed at minimizing SER of the DF system. Finally, the optimal joint adaptation of the parameter triplet was given by numerical optimization techniques. Theoretical analysis and simulation results indicate that, by using the optimal relay location and the optimum power ratio, the average SER for DF cooperative communication system can be optimized.