Transmission power control method and apparatus for mobile commu

Details Transmission power control method and apparatus for mobile commu Transmission power control method and apparatus for mobile commu

1995-05-17

1997-04-22

Safourek, Benedict V.

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

455 383, 455 69, H04J 1300

Patent

active

056234864

ABSTRACT:
A transmission power control method is disclosed for controlling transmission power of radio communications in a CDMA system. The transmission power of a first transmitted signal transmitted from a first station is determined by a transmission power control signal contained in a second transmitted signal sent from a second station. The first station receives the second transmitted signal in the form of convolutional codes, and decodes it by using a first Viterbi decoder and a second Viterbi decoder. The first and second Viterbi decoders includes path memories with the path history length of different first predetermined lengths. The transmission power control signal contained in the second transmitted signal is extracted from the output of the second Viterbi decoder, whereas the other information data is obtained from the output of the first Viterbi decoder. The first station controls the transmission power of the first transmitted signal on the basis of the extracted transmission power control signal.

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IEEE Journal on Selected Areas in Communication, vol. 11, No. 7 pp. 1085-1095, XP000400018 F. Simpson & J.M. Holtzman `Direct Sequence CDMA Power Control, Interleaving and Coding` p. 1086, left col., line 32-right col., line 38.

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