伪码调相与随机脉位复合体制引信研究

【作者】 顾建飞；

【导师】 赵惠昌；

【作者基本信息】 南京理工大学 ， 通信与信息系统， 2007， 硕士

【摘要】 伪码调相与伪随机脉位(PPM)复合体制引信具有很强的抗人为干扰能力，并且距离截止特性好，是引信体制中重要的发展方向之一。它的调制过程相当于先对伪码进行随机脉位调制产生PPM复合码，然后再对产生的复合码进行调制。本论文主要包括下面几方面内容：(1)伪码调相与伪随机脉位复合体制引信的工作原理，PPM伪随机复合码的设计理论及其特征。(2)伪码调相与伪随机脉位复合体制引信抗压制性干扰性能研究。(3)采用美国Xilinx公司的XC9500系列CPLD编程逻辑器件，结合ISE软件平台，设计了PPM伪随机复合码产生器和数字相关器，这将大大减小了硬件电路的规模，满足了引信对电路体积小的要求。(4)以ADF4113为核心器件设计了一个2.477GHz的频率源作为调制载波，其设计过程包括VCO、环路滤波器的设计以及利用单片机对ADF4113控制字写入。(5)使用AD公司芯片AD8349设计调相电路，对CPLD产生的复合码进行相位调制。更多还原

【Abstract】 The pseudo-noise (PN) code phase modulation and pseudorandom pulse position modulation (PPM) combined fuze, having excellent cut-off performance of the distance and strong anti-jamming capability, is one of the important directions of the fuse develop.The process of its modulation is just as that first PN code is modulated by pseudorandom pulse position,this will process a new peudorandom pulse position modulation (PPM) PN code then the new code is modulated。The main content studied and discussed are as followings:(1) The theory of The PN code phase modulation and pseudorandom pulse position modulation (PPM) combined fuze. The design and charateristic of pseudorandom pulse position modulation (PPM) PN code.(2) The study of oppressive anti-jamming performence about pseudo-noise (PN) code phase modulation and pseudorandom pulse position modulation (PPM) combined fuze.(3) By using Xilinx’s XC9500 Series CPLD and software named ISE,we can build pseudorandom pulse position modulation (PPM) PN code signal generator and digital correlator about pseudorandom pulse position modulation (PPM) PN code, that has much smaller bulk as it used to.(4) By using ADF4113, we design a frequency synchronism of 2.477G as carrier wave including the design of VCO and loop filter and the write of controlling word to the ADF4113 by microprocessor.(5) By using AD8349, we design the phase modulation circuit. The pseudorandom pulse position modulation (PPM) PN code from CPLD can be modulated by it。更多还原