SYSTEM AND METHOD OF AN IN-BAND MODEM FOR DATA COMMUNICATIONS OVER DIGITAL WIRELESS COMMUNICATION NETWORKS

SYSTEM AND METHOD OF AN IN-BAND MODEM FOR DATA COMMUNICATIONS OVER DIGITAL WIRELESS COMMUNICATION NETWORKS

A SYSTEM IS PROVIDED FOR TRANSMITTING INFORMATION THROUGH A SPEECH CODEC (INBAND) SUCH AS FOUND IN A WIRELESS COMMUNICATION NETWORK. A MODULATOR (235) TRANSFORMS THE DATA INTO A SPECTRALLY NOISE-LIKE SIGNAL BASED ON THE MAPPING OF A SHAPED PULSE TO PREDETERMINED POSITIONS WITHIN A MODULATION FRAME,...

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Bibliographische Detailangaben
Hauptverfasser: WERNER, MARC W, PIETSCH, CHRISTIAN, GRANZOW, WOLFGANG, SGRAJA, CHRISTIAN, HUANG, PENGJUN, JOETTEN, CHRISTOPH A, FRANK, GEORG
Format: Patent
Sprache:eng
Schlagworte:
ACOUSTICS
MUSICAL INSTRUMENTS
PHYSICS
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
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Zusammenfassung:A SYSTEM IS PROVIDED FOR TRANSMITTING INFORMATION THROUGH A SPEECH CODEC (INBAND) SUCH AS FOUND IN A WIRELESS COMMUNICATION NETWORK. A MODULATOR (235) 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 (495) 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.