摘要
在新一代全球导航卫星系统建设中,双频联合恒包络复用技术得到了广泛的应用。由于信号在星上传输过程中会产生失真,所以需要分析不同双频复用信号通过发射信道后的信号质量。首先建立了一个基于实际发射信道的模型,然后主要分析了AltBOC(Alternate Binary Offset Carrier)、TD-AltBOC(Time Division Alternate Binary Offset Carrier)、ACE-BOC(Asymmetric Constant Envelope Binary Offset Carrier)等不同双频复用方案通过发射信道后的功率谱、星座图、鉴相曲线过零点偏差、相关损失。对三种调制方式进行对比,结果表明在考虑捕获灵敏度的情况下,应优先考虑ACEBOC调制方式。
In construction of the new generation global navigation satellite system（GNSS）, dual-frequency constant envelope multiplexing technology has been widely used. The signal will be distorted during the transmission on the satellite,so it is necessary to analyze the signal quality of different dual-frequency mul-tiplexed signals which have passed through the transmission channel. The actual transmission channel mod-el is established firstly,then the power spectrum, the constellation, the zero-crossing deviation of the phase curve,and correlation loss of the AltBOC（ Alternate Binary Offset Carrier）, TD-AltBOC（ Time Division Al-ternate Binary Offset Carrier） and ACE-BOC （ Asymmetric Constant Envelope Binary Offset Carrier） are mainly analyzed. Comparison among the three modulations shows that ACE-BOC is preferred in consider-ing the acquisition sensitivity.
出处
《电讯技术》
北大核心
2018年第1期18-24,共7页
Telecommunication Engineering
基金
国家自然科学基金资助项目(91438107)
关键词
全球导航卫星系
双频复用信号
信号质量
发射信道模型
global navigation satellite system（GNSS）
dual-frequency multiplexing signal
signal quality
transmission channel model
