Control channel for modems

Excavating

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371 401, 370522, 39520057, H03M 1300

Patent

active

059109599

ABSTRACT:
A methodology for a modem control channel is disclosed. The channel allows faster seamless rate change and precoder tap exchange than the baseline procedure for seamless rate change, allowing for more robust transmission of control information. It can also be use to convey side-information in the case of multiple data applications, serving the purpose of mode switching. Thus, with a single control channel both the needs for seamless rate change and transmitting control information for multiple data applications can be met.

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Krzysztof Wesolowski, "Receiver Structures For Trellis-coded Multipoint QAM Signal", IEEE, 1988.
Lettieri et al., "Data Compression in the V.42bis modems", IEEE, 1994.

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