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 t o 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.
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申请公布号 |
CA2394981(C) |
申请公布日期 |
2005.07.26 |
申请号 |
CA19942394981 |
申请日期 |
1994.09.14 |
申请人 |
PACIFIC COMMUNICATION SCIENCES, INC. |
发明人 |
QUICK, FRANK;SMITH, KEITH;PEPONIDES, GEORGE;BALACHANDRAN, KUMAR |
分类号 |
H04L5/00;H04L12/56;H04M11/06;H04Q7/36;(IPC1-7):H04M11/06 |
主分类号 |
H04L5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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