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高阶BOC信号电离层色散效应的模拟算法*
引用本文:庞晶,刘瀛翔,唐小妹,欧钢.高阶BOC信号电离层色散效应的模拟算法*[J].国防科技大学学报,2015,37(6).
作者姓名:庞晶  刘瀛翔  唐小妹  欧钢
作者单位:国防科技大学 电子科学与工程学院,国防科技大学 电子科学与工程学院,国防科技大学 电子科学与工程学院,国防科技大学 电子科学与工程学院
基金项目:国家自然科学基金资助项目(61403413)
摘    要:导航信号模拟器需要模拟电离层引起的信号延时和色散效应,对于传统BPSK信号,模拟器基于单频假设,通过直接调整码相位和载波相位之间的相对关系来模拟电离层的影响。新一代卫星导航信号广泛采用的BOC (Binary Offset Carrier)调制信号具有更宽的带宽,作单频假设会引入不可忽略的电离层延迟建模误差。论文提出了基于双边带模型的高阶BOC信号高精度模拟方法,并仿真验证了算法的正确性。该方法可应用于导航信号模拟器实现BOC信号电离层色散效应的模拟。

关 键 词:卫星导航  BOC调制  电离层效应  信号模拟
收稿时间:3/9/2015 12:00:00 AM

Ionosphere Effects Simulation with High Precisionfor High Order BOC Modulated Signals
Abstract:The navigation signal simulator needs to simulate the signal delay and dispersion effects caused by the ionosphere. For the traditional BPSK signal, the simulation method is directly adjusting the relative relationship between the code phase and carrier phase for simulating the influence of the ionosphere. The method is based on the assumption of a single frequency for BPSK signal. BOC (Offset Carrier Binary) modulation signal is widely used in the new generation of satellite navigation signals, it has a wider bandwidth, single frequency assuming will cause a non negligible modeling error for the dispersion effects caused by the ionosphere. In this paper, a high accuracy simulation method of high order BOC signal based on the bilateral model is proposed, and the correctness of the algorithm is verified by simulation. The method can be applied to simulate the effect of the ionosphere dispersion for BOC signal in the navigation signal simulator.
Keywords:satellite navigation  BOC modulation  ionosphere effect  signal simulation
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