公开(公告)号：US5491726A

公开(公告)日：1996-02-13

申请号：US107938

申请日：1993-08-17

申请人： Jong-Keung Cheng ,  Nan-Sheng Lin ,  Mihran H. Touriguian

发明人： Jong-Keung Cheng ,  Nan-Sheng Lin ,  Mihran H. Touriguian

IPC分类号： H03H21/00 ,  G01S11/10 ,  H03H15/00 ,  H03H17/00 ,  H04B3/04 ,  H04B7/01 ,  H04L7/033 ,  H04L7/04 ,  H04Q7/38 ,  H03D3/00 ,  H04L27/22

CPC分类号： H04L7/0334 ,  G01S11/10 ,  H04L7/042

摘要： A digital wireless communication system operates between a first unit and a second unit. The received digitally encoded signal is sampled to produce a first sampled digital signal. A first bank of match filters with each match filter having a different frequency range is used to pass the first sampled digital signal therethrough. The output of the first bank of match filters having the largest amplitude is selected along with the match filter which produced the largest amplitude output. The digitally encoded signal having this "coarse" frequency range is then passed through a second bank of match filters. Each of the match filters has a fine frequency different from one another. The output of the second bank of match filters is produced and the output having the largest amplitude is selected. In addition, the filter producing the largest amplitude from the second bank of match filters is also selected.

摘要翻译： 数字无线通信系统在第一单元和第二单元之间操作。 接收到的数字编码信号被采样以产生第一采样数字信号。 使用具有不同频率范围的每个匹配滤波器的第一组匹配滤波器来通过第一采样数字信号。 与产生最大振幅输出的匹配滤波器一起选择具有最大振幅的第一组匹配滤波器的输出。 具有这种“粗”频率范围的数字编码信号然后通过第二组匹配滤波器。 每个匹配滤波器具有彼此不同的精细频率。 产生第二组匹配滤波器的输出，并且选择具有最大振幅的输出。 此外，还选择从第二组匹配滤波器产生最大振幅的滤波器。