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文中介绍了未来移动通信系统的特点和网络架构。讨论了未来移动通信物理层的正交频分复用技术(OFDM)、多入多出系统(MIMO)、认知无线电技术、软件无线电技术以及自适应调制与编码技术等传输的关键技术以及相应的网络结构和协议。最后对未来移动通信系统的发展进行了一定的展望,即未来移动通信系统应该具有高数据率、高频谱利用率、低发射功率、灵活业务支撑能力等特点。
The paper introduces the characteristics and network architecture of future mobile communication system. The key technologies of Orthogonal Frequency Division Multiplexing (OFDM), Multiple Input Multiple Output (MIMO), Cognitive Radio, Software Radio and Adaptive Modulation and Coding Network structure and agreement. Finally, the future development of mobile communication system is prospected. In the future, the mobile communication system should have the characteristics of high data rate, high spectrum utilization, low transmission power and flexible service support.