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适用于超宽带通信测距复合系统的同步机制
乔贝贝,熊蔚明
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(中国科学院空间科学与应用研究中心，北京 100190;中国科学院研究生院，北京 100190)

摘要:

通过Simulink仿真和FPGA板级验证，为基于隧道二极管电路的脉冲超宽带(Impulse R adio Ultra-wideband，IR-UWB)接收机提出了一种同步机制。在物理层中使用了改进数据转换跟踪环的位同步方法，使之可以对单比特数据进行位同步，码速率为2 Mbit/s时误码率趋近于零；MAC层使用了经过变换的IEEE 802.15.4a中的31 位帧引导序列，引导序列出现8位误码时仍然能进行够准确的帧同步。这种机制适用于空间探测无线传感器网络。

关键词: 空间探测无线传感器网络脉冲超宽带位同步帧同步

DOI：

基金项目:

A synchronization scheme for IR-UWB communication-ranging systems

QIAO Bei-bei,XIONG Wei-ming

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Abstract:

A synchronization scheme for the tunnel diode circuit based Impulse Radio Ultra wide band (IR-UWB) receiver is discussed through simulation and boardlevel verifica tio n with Simulink and FPGA. The modified data transition tracking loop bit synchro nization method is adopted，providing a bit synchronization method for the 1Mbit / s singlebit data with the bit error rate approaching zero.The modified 31-bit s equences in the IEEE802.15.4a are used in the MAC layer，which can achieve per fect frame synchronization even there are 8 bit errors. The discussed scheme can be applied to the Wireless Sensor Network(WSN) for space exploration.

Key words: space exploration wireless sensor network IR-UWB bit s ynchronization frame synchronization