To provide a technology capable of reducing the power consumption of each of a plurality of transmission reception stations configuring a spread spectrum communication system, particularly, mobile subscriber station units.
In the spread spectrum communication system for maintaining initial transmission power level of a second transmission reception station in an inactive state, a first transmission reception station uses a chip code to be selected associated with a particular spread spectrum signal from the second transmission reception station to apply despreading to a received signal and measures the power level of the particular signal subjected to the despreading. The second transmission reception station sometimes transmits the particular spread spectrum signal to the first transmission reception station for a period when the second transmission reception station is in the inactive state, the first transmission reception station receives the particular signal to measure a noise power level in a communication channel, estimates a transmission power level, compares the measured value with the estimate value, transmits a power automatic control (APC) signal on the basis of a result of the comparison, and the second transmission reception station adjusts the initial transmission power level in response to the APC signal.
| JP3503659 | CONTROL SIGNAL GENERATION DEVICE |
| JP2005348453 | METHOD FOR PROTECTING PORTABLE CARD |
KOWALSKI JOHN
OZLUTURK FATIH
| JPH0795151A | 1995-04-07 | |||
| JPH04502841A | 1992-05-21 | |||
| JP2000510655A | 2000-08-15 | |||
| JPH0787011A | 1995-03-31 |
Kazuo Abe
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