Multiplex communications – Communication over free space – Combining or distributing information via time channels
Patent
1997-04-25
1999-11-09
Hsu, Alpus H.
Multiplex communications
Communication over free space
Combining or distributing information via time channels
455553, 455522, H04B 7212
Patent
active
059827661
ABSTRACT:
A power control system in a TDMA radio communication system has traffic channels which are associated with a set of speech/channel encoding modes. Each mode has a different mix of speech encoder bit rate and data protection bit rate but the same total available gross bit rate. The transmitter includes a power control unit that replaces a mode allocated to a channel by another mode having either a higher or a lower data protection bit rate and either a lower or a higher speech encoder bit rate if the sound to be encoded requires either a lower or a higher speech encoding bit rate. The power control unit also controls a power adjustment unit that either reduces or increases the output power of the transmitter to a lower or a higher level such that an estimated decoded speech quality measure at the receiver is substantially constant.
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Bruhn Stefan
Ekudden Erik
Hellwig Karl
Nystrom Johan
Hsu Alpus H.
Slavitt Mitchell
Telefonaktiebolaget LM Ericsson
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