发明名称 |
System and method of an in-band modem for data communications over digital wireless communication networks |
摘要 |
A system is provided for transmitting information through a speech codec (in-band) 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 synchronization 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 modulation modes dependent on the communication channel conditions. |
申请公布号 |
AU2009256039(B2) |
申请公布日期 |
2013.09.26 |
申请号 |
AU20090256039 |
申请日期 |
2009.06.05 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
HUANG, PENGJUN;WERNER, MARC W.;FRANK, GEORG;GRANZOW, WOLFGANG;PIETSCH, CHRISTIAN;SGRAJA, CHRISTIAN;JOETTEN, CHRISTOPH A. |
分类号 |
H04L25/03;G10L19/00 |
主分类号 |
H04L25/03 |
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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