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中文摘要：
从基本的双码交替二进制偏移栽波（AltBOC）调制模型出发，结合数学仿真深入研究双码AltBOC、标准AltBOC和恒定包络AltBOC调制原理；重点分析比较了标准Ait—BOC和恒定包络AltBOC调制技术的副载波特点、频谱特性及其对接收机设计产生的影响；利用查表法仿真实现无任何干扰情况下伽利略（Galileo）E5信号，进一步验证了将恒定包络AltBOC调制作为卫星导航信号调制方案的优势，为接收机设计中AltBOC信号的接收处理方式的确定提供了重要的理论依据。
英文摘要：
As to develop high-performance AltBOC receiver, based on 2-codes AhBOC （2-codes Alternate Binary Offset Carrier, 2-codes AltBOC）modulation model and combined with mathematical simulation, the modulation principle of standard AltBOC and constant envelope AItBOC are in-depth studied. The characteristics of sub-carrier and spectral density performance of standard AltBOC are compared with these of constant envelope AItBOC, and focus on analyzed these effect on receiver design. Based on simulated Galileo E5 signal without any interference case by look-up table, the advantage of constant envelope AItBOC modulation in satellite navigation signal modulation scheme is proved. An important theoretical basis is provide to the design approach of AltBOC receiver.
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