公开(公告)号：US09020072B2

公开(公告)日：2015-04-28

申请号：US14123232

申请日：2012-03-27

申请人： Zuping Tang ,  Jiaolong Wei ,  Tao Yan

发明人： Zuping Tang ,  Jiaolong Wei ,  Tao Yan

IPC分类号： H03C3/00 ,  H04L27/32 ,  G01S19/02 ,  G01S19/37 ,  H04L27/20 ,  H04L23/02 ,  H04L25/03 ,  H03D3/26

CPC分类号： H04L27/32 ,  G01S19/02 ,  G01S19/37 ,  H03D3/26 ,  H04B2215/065 ,  H04L23/02 ,  H04L25/03 ,  H04L27/20

摘要： The present invention provides a method for modulating a navigation signal, comprising: multiplying a data channel difference signal between upper and lower sidebands by a sine binary subcarrier to obtain an odd timeslot baseband signal of a branch Q, and multiplying a data channel sum signal of the upper and lower sidebands by a cosine binary subcarrier to obtain an odd timeslot baseband signal of a branch I of the data channel; multiplying a pilot channel difference signal between the upper and lower sidebands by the sine binary subcarrier to obtain an even timeslot baseband signal of the branch Q, and multiplying a pilot channel sum signal of the upper and lower sidebands by the cosine binary subcarrier to obtain an even timeslot baseband signal of the branch I; and performing QPSK modulation on the baseband signals of the branch I and branch Q to obtain a TD-AltBOC modulation signal. The present invention can implement transmission of different navigation services at two adjacent frequency bands, and each navigation service comprises a data channel and a pilot channel. The navigation signal of each sub-band may be received independently, or signals of the upper and lower sidebands may be jointly received to obtain high-precision navigation performance.

摘要翻译： 本发明提供了一种用于调制导航信号的方法，包括：将上，下边带之间的数据信道差信号乘以正弦二进制副载波，以获得分支Q的奇数时隙基带信号，并将 通过余弦二进制副载波上下边带获得数据信道的分支I的奇数时隙基带信号; 将上边带和下边带之间的导频信道差信号乘以正交二进制副载波，以获得分支Q的偶数时隙基带信号，并将上边带和下边带的导频信号和信号乘以余弦二进制副载波，以获得 分支I的时隙基带信号; 对分支I和分支Q的基带信号进行QPSK调制，得到TD-AltBOC调制信号。 本发明可以在两个相邻频带实现不同导航业务的传输，每个导航业务包括数据信道和导频信道。 可以独立地接收每个子带的导航信号，或者可以共同地接收上边带和下边带的信号以获得高精度的导航性能。