【作者】 王桂馨；

【导师】 康桂霞；

【作者基本信息】 北京邮电大学 ， 通信与信息系统， 2013， 硕士

【摘要】 随着热点地区的增多以及多媒体应用的推动,无线通信系统向着宽带高速的方向演进。新一代无线通信网络高吞吐率的需求对媒体接入控制层(Media Access Control, MAC)和物理层(Physical layer, PHY)提出了挑战,同时也让高速跨层通信成为重要的研究课题。本文主要来源课题是国家科技重大专项——“超高速无线局域网无线接口关键技术研究与验证”。该项目对新一代无线局域网接口关键技术进行研究和硬件平台验证。本文主要研究高速、超高速无线通信系统中MAC-PHY跨层接口的设计、实现及其跨层联合应用。首先介绍了高速无线通信试验系统的协议及实现平台架构。然后基于此系统,本文提出了一种基于现场可编程门阵列(Field Programmable Gate Array, FPGA)和PCIe (Peripheral Component Interconnect Express)总线的新型MAC-PHY高速跨层接口协议,并进行了仿真和硬件平台实现。测试结果证实本文提出的架构可以支持高达2.50Gbps的峰值数据速率以及1.21Gbps的系统吞吐量,取得预期性能,能满足下一代无线通信系统的高速、实时传输需求。最后基于本文提出的MAC-PHY接口(MAC-PHY Interface, MPI)协议,结合跨层设计思想,研究了自适应调制编码(Adaptive Modulation and Coding, AMC)技术并设计了硬件实现解决方案。此外,联合MPI,对现有的低密度校验码(Low-Density Parity-Check Codes, LDPC)高速译码器进行了优化,制定了MAC-PHY跨层联合优化设计方案。更多还原

【Abstract】 With the dramatic increase of hot spots and pushing of multimedia applications, wireless communication systems are undergoing the evolution to a broadband and high-speed direction. High-throughput transmission requirements of the next-generation wireless systems put forward a challenge for both media access control (MAC) layer and physical layer (PHY) technologies, making MAC-PHY cross-layer communications a critical research subject.The thesis is mainly based on the National Science and Technology Major Project "Research and verification of key technologies for the Very-High-Throughput Wireless LAN System". The project carries out research and hardware platform verification on key technologies of the next-generation WLAN wireless interface. The thesis focuses on the design, implementation and cross-layer joint applications of MAC-PHY interface in the high-speed wireless communication systems.Firstly, a high-speed wireless communication system is presented. Then the protocol and hardware platform architecture are introduced.Secondly, the thesis puts forward a novel MAC-PHY cross-layer interface (MPI) protocol, based on field programmable gate array (FPGA) and peripheral component interconnect express (PCIe) bus. Simulation and hardware implementation are conducted, verifying that the proposed protocol can support a maximum data rate of2.50Gbps, and reach a throughput of1.21Gbps, achieving high performance as expected. Thus the proposed MPI can meet the high-speed and real-time transmission requirements of next generation wireless communication systems.Finally, based on the above-mentioned MPI and cross-layer design schemes, the thesis researches adaptive modulation and coding (AMC), and designs a hardware realization scheme for AMC. Besides, in conjunction with MPI, the present decoder of low density parity check codes (LDPC) is optimized, with a MAC-PHY cross-layer joint design scheme devised.更多还原