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 (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.</p> |
申请公布号 |
KR20110016477(A) |
申请公布日期 |
2011.02.17 |
申请号 |
KR20117000184 |
申请日期 |
2009.06.05 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
WERNER MARC W.;PIETSCH CHRISTIAN;SGRAJA CHRISTIAN;GRANZOW WOLFGANG;LEUNG NIKOLAI K. N.;JOETTEN CHRISTOPH A.;HUANG PENGJUN |
分类号 |
H04L1/18;G10L19/00;H04L7/027 |
主分类号 |
H04L1/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|