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
EP2291965(A1)
申请公布日期
2011.03.09
申请号
EP20090759495
申请日期
2009.06.05
申请人
QUALCOMM INCORPORATED
发明人
HUANG, PENGJUN;PIETSCH, CHRISTIAN;SGRAJA, CHRISTIAN;FRANK, GEORG;JOETTEN, CHRISTOPH, A.;WERNER, MARC, W.;GRANZOW, WOLFGANG