摘要
伽利略导航系统将在E5频段发射交替二元偏置载波(Alternate Binary Offset Carrier,ALTBOC)信号,但国内外学者对其特性的研究还很不充分。基于随机信号分析理论,在对Galileo ALTBOC(15,10)信号各分量正交性证明基础上,提出采用多进制符号编码调制信号功率谱和正交信号功率谱公式推导Galileo ALTBOC信号的功率谱的新方法,并将其与传统双向偏移QPSK-R(10)信号功率谱近似算法进行比对,ALTBOC功率谱密度与双向偏移QPSK-R(10)功率谱密度最大差0.9 dB。
Galileo navigation system will transmit alternate binary offset Carrier（ALTBOC） waves on E5 band,but researchers don＇t know yet the characteristics of these signals like the palm of their hands.Power spectrum density formulas for multilevel coded spreading symbols modulation signals and orthogonal signals are utilized to deduce PSD of Galileo ALTBOC waves based on analytical methods for random signals.PSD of ALTBOC（15,10）waves and bidirectional offset QPSK-R（10） waves are compared too.The former is 0.9 dB larger than the latter at most.
出处
《无线电工程》
2012年第5期34-35,64,共3页
Radio Engineering
关键词
卫星导航
功率谱
随机信号分析
交替二元偏置载波调制
伽利略
satellite navigation
power spectrum density
random signal analysis
alternate binary offset carrier modulation
Galileo
