Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Patent
1997-10-27
2000-11-07
Hunter, Daniel S.
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
455 69, H04Q 720
Patent
active
061448605
ABSTRACT:
A transmission power control system suitable in use for a mobile communications system in which communications are performed through a many-valued encoding operation in which codes are represented with symbols. CIR calculating means is disposed in the transmission station and calculates a CIR by subtracting an interference signal level from a desired signal level of a transmission signal, wherein the desired signal level is obtained based on an average power of inverse-modulated pilot symbols each obtained by inverse-modulating a pilot symbol with a theoretical value of the pilot symbol, and wherein the interference signal level is obtained based on a distribution of inverse-modulated pilot symbols each obtained by inverse-modulating a pilot symbol with a theoretical value of the pilot symbol. Transmission power indicating means is disposed in the transmission station and transmits an indication for transmission power control according to the CIR of the transmission signal from the remote call station. Transmission power adjusting means is disposed in the remote call station and varies transmission power according to the indication for transmission power control from the transmission station. The quality of a receive signal can be maintained by improving the measurement accuracy of a received signal level.
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Hunter Daniel S.
NEC Corporation
Wyche Myron K.
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