发明名称 |
Methods and apparatus for detecting cellular digital packet data (CDPD) |
摘要 |
Disclosed herein are methods and apparatus for detecting the presence of a CDPD carrier in a channel of a cellular system (although the invention is broadly applicable to detecting a specific kind of carrier associated with an "overlay" system, wherein an "overlay" system is one that shares the frequency allocation of another system on a non-cooperating basis). This specification describes a spectral estimation technique for detection of a CDPD carrier. In addition, this specification describes an MMSE (minimum mean-squared error) method that improves on the spectral estimation method.
|
申请公布号 |
US5719902(A) |
申请公布日期 |
1998.02.17 |
申请号 |
US19950424706 |
申请日期 |
1995.04.18 |
申请人 |
PACIFIC COMMUNICATION SCIENCES, INC. |
发明人 |
QUICK, R. FRANKLIN;BALACHANDRAN, KUMAR;SMITH, KEITH |
分类号 |
G10L11/02;H04B17/00;H04L12/56;H04L27/00;H04L27/18;H04W48/18;(IPC1-7):H04B3/46;H04Q1/20 |
主分类号 |
G10L11/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|