Time Division-Synchronous Code Division Multiple Access (TD-SCDMA),a home-grown standard for the third generation mobile communications,is already mature and ready for commercial deployment. The enhancement and evolut...Time Division-Synchronous Code Division Multiple Access (TD-SCDMA),a home-grown standard for the third generation mobile communications,is already mature and ready for commercial deployment. The enhancement and evolution of the TD-SCDMA system is a hot topic recently. Many strategies for TD-SCDMA enhancements and evolutions have been proposed,but there are no integrated solutions that can jointly consider the development both in the short term and in the long term. This paper discusses four evolution phases,which are proposed according to the key technologies. Phase 1 is about the current TD-SCDMA system. Phase 2 is the short term evolution of TD-SCDMA,i.e.,the period of HSxPA,including the evolution of High Speed Downlink Packet Access (HSDPA),High Speed Uplink Packet Access (HSUPA) and High Speed Packet Access plus (HSPA+). Phase 3 is the Long Term Evolution (LTE). Phase 4 is the Beyond 3G (B3G)/Fourth Generation (4G) mobile communication Time Division Duplex (TDD) system,which is based on TD-SCDMA. Key characters for every evolution phase are discussed,as well as the advanced technologies adopted in the evolution process such as Multiple Input Multiple Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM).展开更多
扫频仪是近年来在移动通信网络规划与优化中广泛应用的新型测量仪器,针对GSM(global system of mobile communication)与TD-SCDMA(time division-synchronous code division multiple acess)双网融合优化的新需求,研究了双模扫频仪技术...扫频仪是近年来在移动通信网络规划与优化中广泛应用的新型测量仪器,针对GSM(global system of mobile communication)与TD-SCDMA(time division-synchronous code division multiple acess)双网融合优化的新需求,研究了双模扫频仪技术,介绍了其空时频三维盲检测的系统模型、工作流程以及测量速度分析、兼顾接收机与测量仪器双重特性的关键算法,论述了多通道射频前端与基带电路的硬件设计方案,并给出了主要功能与性能指标的测试结果和应用实例。研制的GSM/TD-SCDMA双模五频段扫频仪,可同时进行GSM与TD-SCDMA两个网络的测量,相比传统的单模路测设备,不仅提高了效能,而且降低了成本,结构更紧凑。展开更多
基金the 863 Program of China under grant 2006AA01Z257the National Natural Science Foundation of China under grants 60602058 and 60572120.
文摘Time Division-Synchronous Code Division Multiple Access (TD-SCDMA),a home-grown standard for the third generation mobile communications,is already mature and ready for commercial deployment. The enhancement and evolution of the TD-SCDMA system is a hot topic recently. Many strategies for TD-SCDMA enhancements and evolutions have been proposed,but there are no integrated solutions that can jointly consider the development both in the short term and in the long term. This paper discusses four evolution phases,which are proposed according to the key technologies. Phase 1 is about the current TD-SCDMA system. Phase 2 is the short term evolution of TD-SCDMA,i.e.,the period of HSxPA,including the evolution of High Speed Downlink Packet Access (HSDPA),High Speed Uplink Packet Access (HSUPA) and High Speed Packet Access plus (HSPA+). Phase 3 is the Long Term Evolution (LTE). Phase 4 is the Beyond 3G (B3G)/Fourth Generation (4G) mobile communication Time Division Duplex (TDD) system,which is based on TD-SCDMA. Key characters for every evolution phase are discussed,as well as the advanced technologies adopted in the evolution process such as Multiple Input Multiple Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM).
文摘扫频仪是近年来在移动通信网络规划与优化中广泛应用的新型测量仪器,针对GSM(global system of mobile communication)与TD-SCDMA(time division-synchronous code division multiple acess)双网融合优化的新需求,研究了双模扫频仪技术,介绍了其空时频三维盲检测的系统模型、工作流程以及测量速度分析、兼顾接收机与测量仪器双重特性的关键算法,论述了多通道射频前端与基带电路的硬件设计方案,并给出了主要功能与性能指标的测试结果和应用实例。研制的GSM/TD-SCDMA双模五频段扫频仪,可同时进行GSM与TD-SCDMA两个网络的测量,相比传统的单模路测设备,不仅提高了效能,而且降低了成本,结构更紧凑。
