摘要
扩频技术在通信和卫星导航领域得到了广泛应用,传统仿真数据的生成方法存在计算量大、忽略信道影响因素,较难实现高精度生成等问题。结合扩频系统信号和噪声的特点,提出了基于扩频码码片相关的信号生成以及基于AR模型的带限高斯噪声生成两种高效仿真信号生成方式。该方法计算量相对于传统高精度方法可由1GHz的生成速率降低至码片速率级的数据生成速率,同时保证了信号生成的灵活性和可控性。相关结果可用于现代化导航接收机的仿真数据快速生成。
Spread spectrum technology has been widely used in the field of communication and satellite navigation.Traditional methods to generate simulation data have heavy computation burden,ignoring the channel factors and other issues.Considering characteristics of spread spectrum systems signals and noise,a fast and efficient method is presented to generate signals based on spreading code chip and band-limited Gaussian noise based on AR model.Compared with the conventional high-precision methods,the complexity of calculation decreased from 1GHz rate to chip rate,and maintained the flexibility of signal generation and channel factors control at the same time.This research can be used in the simulation of modern GNSS receivers.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2012年第2期51-54,共4页
Journal of National University of Defense Technology
关键词
直接序列扩频
GNSS
信号建模
数据仿真
高效生成
direct sequence spread spectrum
GNSS
signal modeling
data simulation
efficient generation
