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超宽带(UWB)通信是目前无线通信研究的热点,其中脉冲无线电(ImpulseRadio,IR)技术采用亚纳秒脉冲信号作为信息传输的载体,数据传输速率大于100Mbps,具有超宽频谱和极低功率谱密度的优点。在采用IR技术的UWB通信中,脉冲的捕捉和同步是它的核心技术和难点。该文给出了采用基于正交分解进行脉冲同步的方法,相对于传统的使用匹配滤波器进行的定时估计和接收,具有结构简单,实现方便,在室内密集多径信道下和极大的符号间干扰下均能稳定工作的特点。仿真表明,该方法对多径捕获、脉冲重复频率和定时估计都有很好的性能。
Ultra-wideband (UWB) communication is the hotspot in wireless communication research. Impulse Radio (IR) uses sub-nanosecond pulse signal as the carrier of information transmission, the data transmission rate is more than 100Mbps, with ultra-wideband and very low power spectrum The advantages of density. UWB communication in the use of IR technology, pulse capture and synchronization is its core technology and difficulties. This paper presents a method of pulse synchronization based on orthogonal decomposition. Compared with the traditional method of timing estimation and receiving using matched filter, it has the advantages of simple structure and convenient implementation. In the indoor dense multipath channel, Interference can be stable under the work of the characteristics. Simulation shows that this method has good performance on multipath acquisition, pulse repetition frequency and timing estimation.