802.16e系统周期测距的软件设计和实现

摘要

测距作为WiMAX上行链路调整时间偏置、功率信息和载波频率的一种方法,在系统接入和通信过程中起着重要作用.深入研究了基于ARM处理器的802.16e系统正交频分多址(orthogonal frequency division multiple access,OFDMA)物理层的周期测距的软件设计与实现,给出了802.16e系统OFDMA物理层的周期测距算法和流程、周期测距码的发射和检测原理以及周期测距模块的C语言设计.在搭建的测试平台上进行链路测试,结果表明此方案是可行的.%One of the ways to adjust time offset,power information and carrier frequency of WiMAX uplink is ranging,which playes an important role in the process of system access and communication. This paper thoroughly studies the software design and implementation for periodic ranging of orthogonal frequency division multiple access (OFDMA) physical layer of 802. 16e based on Advanced RISC Machines(ARM) processor. It gives periodic ranging algorithm and process, the principle of periodic ranging code transmission and detection,C language design of periodic ranging modular for OFDMA physical layer of 802. 16e. Test results of system link on our built test platform show that this scheme is feasible.