发明名称 |
SYSTEM AND METHOD OF AN IN-BAND MODEM FOR DATA COMMUNICATIONS OVER DIGITAL WIRELESS COMMUNICATION NETWORKS |
摘要 |
<p>A system is provided for transmitting information through a speech codec (inband) such as found in a wireless communication network A modulator transforms the data into a spectrally noise-like signal based on the mapping of a shaped pulse to predetermined positions within a modulation frame, and the signal is efficiently encoded by a speech codec A synchro-nization sequence provides modulation frame timing at the receiver and is detected based on analysis of a correlation peak pattern. A request/response protocol provides reliable transfer of data using message redundancy, retransmission, and/or robust modula-tion modes dependent on the communication channel conditions</p> |
申请公布号 |
CA2725575(C) |
申请公布日期 |
2014.04.01 |
申请号 |
CA20092725575 |
申请日期 |
2009.06.05 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
SGRAJA, CHRISTIAN;WERNER, MARC W.;PIETSCH, CHRISTIAN;GRANZOW, WOLFGANG;LEUNG, NIKOLAI K. N.;JOETTEN, CHRISTOPH A.;HUANG, PENGJUN |
分类号 |
H04L1/00;H04L1/18 |
主分类号 |
H04L1/00 |
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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