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Design and Simulation of Low Complexity Frequency Hopping Systems Using LDPC Codes

Abstract

跳频通信是现代军事无线通信抗干扰的主要手段,对于在恶劣的电磁环境中保障畅通的通信指挥,具有重大的军事意义。同时跳频通信技术不仅具有优良的抗干扰性能,而且拥有多址组网性能,在民用移动通信中也得到了广泛的应用。目前,跳频通信正在向更高的跳频速率、更强的抗干扰能力和更低的实现复杂度发展。跳频通信系统中的信道编码技术是提高系统性能的关键技术,同时也是跳频通信系统中复杂度较高的模块之一。 为了在保证性能的前提下,降低跳频通信系统复杂度,本文提出了两套方案。第一套方案是从降低编码技术本身复杂度的角度出发,采用低实现复杂度的EG-LDPC码来代替随机构造的LDPC码。仿真结果显示:无论在部分频带干扰信道还...Frequency-hopping (FH) wireless communication systems were initially developed as a military application to permit reliable and safe communications in the face of an enemy interferer, especially in a poor electromagnetic environment. So the FH systems are of a great military significance. Due to the good anti-jamming performance and multiple access ability of FH technique, FH systems are also wide...学位:工学硕士院系专业:信息科学与技术学院通信工程系_通信与信息系统学号:2332006115262

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