Abstract: A communication terminal which suppresses the interference power to a cell newly appearing on handover in an uplink line. A transmission power calculation section (107) of the communication terminal calculates the transmission power Ptransmit by adding the value specified by a TPC command to the previous transmission power. A reception power measuring section (109) calculates the pilot reception power Pactive of the cell in communication. A reception power measuring section (110) calculates the pilot reception power Pother of a vicinity cell which will probably newly perform communication. A transmission power correction section (111) corrects the transmission power to a value Pallow lower than Ptransmit by subtracting (Pother?Pactive) from Ptransmit if the pilot reception power Pother is larger than the pilot reception power Pactive. A transmission power control section (153) controls the transmission power of the transmission signal to Pallow.

Abstract: During the time when a mobile station of a communicating party receives a signal from another base, a synchronization control section 101 instructs stop of signal transmission to a control section 102-1, which corresponds to a system that transmits a signal with carrier frequency f1 at which a signal is received from another base station, and a control section 102-2, which corresponds to a system that transmits a signal with carrier frequency f2 adjacent to a frequency at which a signal is received from another base station. When receiving instructions to stop the transmission from the synchronization control section 101, a control sections 102-1 and 102-2 instruct switch 104-1 and a switch 104-2 to cut off a signal to be transmitted and instruct an RF analog section 107-1 and an RF analog section 107-2 to stop the signal transmission.

Abstract: The transmit power control apparatus 20 measures, through the SIR measuring section 101, not only a first SIR (SIR1) value reflecting all interference factors but also a second SIR (SIR2) value stripped of a power value component caused by multipath interference. The control signal formation section 31 forms a signal for controlling transmit power using these two SIRs (SIR1, SIR2). In this case, a control signal is formed for instructing that transmit power should not be allowed to increase/decrease when the ratio of the multipath interference component to all interference components is large and that transmit power should be allowed to increase/decrease when the ratio of the multipath interference component is small.

Abstract: Each gain control amplifier 3 adjusts the transmission power of the transmit signals directed to each user according to the power control signal. Gaussian noise generator 4 generates Gaussian noise. Noise power control section 6 controls gain control amplifier 5 based on the power control signal to each user and total power control signal and adjusts the transmission power of the Gaussian noise so that the summation of the transmission power may be kept constant.

Abstract: A demodulator for a cellular communications receiver system is disclosed which preferentially selects for concurrent demodulation the transmissions which originate from different base stations. The cellular receiver system selects a group of transmissions having the highest reception energies at each reception timing and preferentially assigns those transmissions to be demodulated. The receiver is also equipped to select a second group of transmissions having reception energies other than the highest at each reception timing. The receiver is provided with a priority one table and a priority two table for storing records of the reception energy and reception timing for each respective group of transmissions.