【作者】 衣强；

【导师】 郭黎利；

【作者基本信息】 哈尔滨工程大学 ， 通信与信息系统， 2007， 硕士

【摘要】 并行组合扩频通信是在M-ary扩频通信基础上提出的一种特殊的扩频通信方式，它较普通的扩频通信系统和M-ary扩频通信有更高的信息传输能力强、更高的频带利用率，同时继承了扩频通信系统具有抗干扰、抗侦破等显著特点，适用于猝发通信、频带受限通信等领域。，同时军事通信对隐蔽性和快速性要求更高，因而并行组合扩频通信方式在军事通信领域中也是很好的选择。本文采用理论分析和计算机仿真的方法，重点研究并行组合扩频通信系统的误码性能、频带利用率、各种干扰下的性能、基带数据映射算法和伪随机码性能对系统的影响等关键技术。理论分析和仿真表明，并行组合扩频通信误码率要高于普通直扩系统且硬件设备复杂，但在大信噪比情况下，并行组合扩频通信系统是可行的，能实现高效率传输信息；伪随机码的互相关和码的数量对系统的性能影响非常大，经过仿真分析平衡Gold序列和码周期较长m-W序列比较适合系统应用。在分析介绍了以往学者提出的数据序列映射算法的基础上，提出了一种基于组合数学方法的γ-组合的数据序列映射算法，是一种有效且简单、能实现一对一映射的数据映射算法；最后设计了基于软件无线电思想的并行组合信号源并给出了具体结构，可在该平台上实现编码、扩频、调制等功能，各功能模块软件化，具有一定的通用性。更多还原

【Abstract】 The Parallel Combinatory Spread Spectrum Communication System (PCSS) is brought forward by the professor Jinkang Zhu based on the which has a higher information transmission efficiency and frequency bandwidth utility than general Spread Spectrum Communication System and M-ary spread spectrum communication. It has their excellent characters which are the anti-jamming performance and counter reconnaissance characteristics .the PCSS can be applied in burst communication or restricted frequency bandwidth communication. Because military correspondence request Concealment with high speed, the adoption of PCSS system is a good choice.The dissertation use theories analysis and computer simulation methods to analyze system error-ratio performance, frequency bandwidth efficiency, performance under some noises, data-mapping method and effect of PN codes.Theory analysis and computer simulation show that error rate of PCSS system is higher than the general Spread Spectrum Communication System, moreover hardware equipment is complex. But at large snr(signal noise ratio)it is viable and can achieve high efficiency to transmit information. PN sequences’ correlation and amount have great effect to PCSS system. Through simulation the balance gold sequences and m-W sequences with long period are fit for PCSS system. The dissertation also introduces and analyses the data-sequence mapping arithmetic that are provided by former academician and propose a r-combinatory method which is an available and simple data-sequence mapping arithmetic which is simple and easy to come true by software. At last, the dissertation gives a design of PCSS signal resource which is based on the idea of software radio and gives the configuration in detail. The designed roof can achieve coding, spectrum spreading, modulation and other function which has great common utility.更多还原