宽间隔频率编码映射的MB-MDFH系统关键技术研究

项目名称： 宽间隔频率编码映射的MB-MDFH系统关键技术研究

项目编号： No.61201126

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 董彬虹

作者单位： 电子科技大学

项目金额： 25万元

中文摘要： MB-MDFH技术在子频段上用部分信息比特驱动跳频序列，在多个频段上同时发送MDFH信号，提高了跳频系统的频谱效率。本项目主要研究MB-MDFH系统的抗干扰、多址和抗截获技术：(1)提出一种宽间隔频率编码映射技术，将某个频段上MDFH信号受到的干扰分散为多个子频段MDFH信号受到的单音或多音干扰，从而提供使用纠错编码减轻或消除干扰影响的措施，接收机可以通过软判决非线性合并译码，进一步提高系统的抗干扰能力。当把各个子频段分配给不同的用户，就是宽间隔FDMA技术，同样可以提高MDFH多用户的抗干扰能力。(2)高密度MDFH通信技术，通过增加跳频谱线密度，使对抗方无法精确测量跳频频率，无法释放欺骗式干扰，只能释放代价很高的盲干扰，合法接收机由于已知高密度跳频图案密钥，仍然可以正常接收。本项目的研究成果可以应用于军用和民用跳频抗干扰通信，提高跳频抗干扰系统的频谱效率。

中文关键词： 多段数据驱动跳频；宽间隔；抗干扰；高密度；抗截获

英文摘要： Unlike in traditional FH where the hopping pattern of each user is determined by a pre-selected PN sequence, in MDFH, part of the message stream will be acting as PN sequence, and transmitted through hopping frequency control. As a result, system efficiency is increased significantly since additional information transmission is achieved at no extra cost on either bandwith or power. The multi-band MDFH scheme, named MB-MDFH allow simultaneous transmissions over multiple frequency bands. Our project's main research focus on anti-jamming and anti-intercept technology of MB-MDFH system. We proposed a wide-interval frequency-coded mapping technique which dispersed jamming on a certain MDFH into single or multi-tone interference on multi-band MDFH, then error correction coding can possible mitigate interference effects. At the same time, the receiver can use the nonlinear soft decision decoding to further enhance the anti-jamming capability of the system. When each band assigned to different users, can also improve MDFH multi-user anti-jamming capability.We also proposed a high-density MDFH communication technology. By increasing the spectral density of frequency hopping, the attacker could not measure the hopping frequency precisely, can only release a costly blind interference, but the Legitimate receiver is not

英文关键词： MB-MDFH；wide interval；anti-jam；high-density；anti-interception