Abstract: A method and apparatus of transmission power control to minimize a downward interference caused by the soft hand-off operation for a mobile station existing in the cell border in a cellular mobile communication system which uses a code division multiple access (CDMA) system for radio communication system are provided. The mobile station detects the signal power of pilot channels of the respective base stations A and B, and reports them to the respective base stations. Each base station calculates the propagation characteristic between the mobile station and the base station to determine a transmission power of the traffic channel, which is the most suitable level for the mobile station which is executing the soft hand-off operation, based on the relation among the reported information, the current transmission power of the pilot channel and the traffic channel.

Abstract: A vortex flowmeter detector is attached to or detachable from a vortex generation body for measurement of flow rate. The vortex flowmeter detector comprises a cylindrical oscillation tube having a bottom and a vortex detection part which is fixed by a fixing flange of the oscillation tube, wherein the oscillation tube is detachably inserted into a hole which is open to the vortex generation body at one end thereof, and the oscillation tube is fixed by a flange. An alternate pressure caused by a Karman vortex is introduced from both sides of the vortex generation body into the hole so as to oscillate the oscillation tube. This oscillation is received by a spring plate by way of an element cover, and it is transmitted to piezoelectric elements which are stuck to two chamfers of an elastic base material.

Abstract: A feedforward-type distortion compensation circuit which can compensate for a non-linear distortion component generated by a main amplifier.