一种高速率Chirp-UWB信号发生器的设计与实现  

Design and implementation of Chirp-UWB generator

作　　者：樊孝明[1] 林基明[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《微型机与应用》2012年第14期17-20,共4页Microcomputer & Its Applications

基　　金：广西区自然基金资助(0991018Z)

摘　　要：Chirp超宽带通信系统使用满足UWB定义的Chirp信号作为数据传输的载体,起到了扩频效果,具有CSS和UWB的优点,其处理增益大、传输距离远、功率谱密度低、抗衰落能力和抗截获能力强,获得广泛研究与关注。Chirp-UWB信号发生器是实现该通信系统的关键技术之一,采用DA+锁相环(PLL)技术,设计并实现了Chirp-UWB信号,详细分析了其设计过程与原理。试验表明,设计的信号发生器在≥2Mb/s调制数率的驱动下,能够产生稳定可靠的Chirp-UWB信号,该发生器具有电路结构简单、易于编程控制、扩展性好以及实用性强等优点,能够满足远距离高速率无线传输数据的要求。Chirp UWB communication systems uses chirp signals which meets the definition of UWB as data carrier to play a spreading effect, and has the advantages of CSS and UWB. The system has large processing gain,long transmission range,low power spectral density, strong ability of anti-fading and anti-interception, and gets extensive study and attention. Chirp-UWB signal gen- erator is one of the key technologies to achieve the communication, which is designed and implemented using DA＋PLL.Moreover, the design procdures and operation principles are analyzed in detail.The results show that the generator can produce stable and re- liable Chirp-UWB signal driven by the modulation data with at least 2 Mb/s,which has a simple circuit structure, easy-to-program control, good scalability and practical advantages, can meet the requirements of long distance and high speed wireless data transmission.

关 键 词：超宽带 CHIRP信号 锁相环 电荷泵 

分 类 号：TN914[电子电信—通信与信息系统]