Abstract: In a mobile telephone system including a mobile telephone base station (20) connected to a telephone network (40) and a mobile telephone apparatus (10) which includes a first GPS unit for receiving a GPS wave as a first received GPS signal to obtain position data of the mobile telephone apparatus by information processing with reference to the first received GPS signal and a radio section for transmitting, by radio communication, the position data of the mobile telephone apparatus to the mobile telephone base station to make the mobile telephone base station inform the telephone network of the position data of the mobile telephone apparatus, the mobile telephone base station includes a mobile telephone base section for transmitting, by radio communication, position information of the mobile telephone base station to the mobile telephone apparatus to enable the mobile telephone apparatus to use the position information of the mobile telephone base station instead of the position data of the mobile telephone ap

Abstract: A cellular phone includes a radio circuit block, and a control block including a CPU for controlling operations of the cellular phone and treating data for the cellular phone. The control block retains an interrupt signal when the radio circuit block receives a radio signal, and delivers the interrupt signal to the CPU after completion of the receipt of the radio signal by the radio circuit block.

Abstract: Phase data 129 of received signal is fed through a one symbol delaying unit 141 and a second substracter 1 to a second decoder 2 for decoding to generate quality data 133c. The quality data 133c is computationally processed to detect frequency deviation. The quality data 133b is obtained by decoding in a first decoder 142 through the one symbol delaying unit 141, a correcting circuit 144 and a first decoder 142. The quality data 133b is used for line control.

Abstract: In a mobile telephone system including a mobile telephone base station (20) connected to a telephone network (40) and a mobile telephone apparatus (10) which includes a first GPS unit for receiving a GPS wave as a first received GPS signal to obtain position data of the mobile telephone apparatus by information processing with reference to the first received GPS signal and a radio section for transmitting, by radio communication, the position data of the mobile telephone apparatus to the mobile telephone base station to make the mobile telephone base station inform the telephone network of the position data of the mobile telephone apparatus, the mobile telephone base station includes a mobile telephone base section for transmitting, by radio communication, position information of the mobile telephone base station to the mobile telephone apparatus to enable the mobile telephone apparatus to use the position information of the mobile telephone base station instead of the position data of the mobile telephone ap

Abstract: In a mobile communication device having a first wireless section for a portable phone and a second wireless section for short range wireless data communication, the second wireless section is controlled by a control section so that it is intermittently put into an on-state under control of a control section in a standby state so as to reduce power consumption of the second wireless section. Such intermittent on-state is established by intermittently turning a battery of the second wireless section in the on-state by the control section. The second wireless section may be controlled individually from or dependently on the first wireless section.

Abstract: In a mobile telephone system including a mobile telephone base station (20) connected to a telephone network (40) and a mobile telephone apparatus (10) which includes a first GPS unit for receiving a GPS wave as a first received GPS signal to obtain position data of the mobile telephone apparatus by information processing with reference to the first received GPS signal and a radio section for transmitting, by radio communication, the position data of the mobile telephone apparatus to the mobile telephone base station to make the mobile telephone base station inform the telephone network of the position data of the mobile telephone apparatus, the mobile telephone base station includes a mobile telephone base section for transmitting, by radio communication, position information of the mobile telephone base station to the mobile telephone apparatus to enable the mobile telephone apparatus to use the position information of the mobile telephone base station instead of the position data of the mobile telephone ap

Abstract: A cellular phone includes a radio circuit block, and a control block including a CPU for controlling operations of the cellular phone and treating data for the cellular phone. The control block retains an interrupt signal when the radio circuit block receives a radio signal, and delivers the interrupt signal to the CPU after completion of the receipt of the radio signal by the radio circuit block.

Abstract: A digital portable telephone unit of the invention is equipped with: an antenna through which signal is transmitted and received; a radio section which conducts the frequency conversion of signal and outputs IF (intermediate frequency) and RSSI (receive signal strength indicator); a demodulation section which demodulates the IF to output receive data; an A/D converter which outputs digitalizing the voltage of RSSI; and a control section which receives the receive data and outputs audio signal. The demodulation section outputs a trigger to indicate a symbol point of RSSI to the A/D converter.

Abstract: A digital cellular phone suspends power supplies of circuits as many as possible in a predetermined time period during which a signal is neither received nor sent. The predetermined time period is mostly measured by counting a clock signal of a low frequency and measured for a very short time by counting a clock signal of a high frequency. In restarting the suspending power supplies, a symbol clock can be reproduced with the same phase as a suspended phase, because the phone includes a counter 143 to hold phase timing of the symbol clock when the power supply of the related circuit is suspended.

Abstract: In the PLL, the outputs of a reference frequency oscillator (101) and a VCO (102) are frequency divided by variable frequency dividers (104, 105), respectively, and the outputs thereof are compared in a phase comparator (106). The frequency division numbers of the variable frequency dividers (104, 105) are switched at the same time according to the outputs of registers (108, 109) and the output of an S/P converter (110). Serial data stored in registers (114-116) is fed out at a timing preset in a timer circuit (112) via a P/S converter (111) to the S/P converter (110). Thus, the PLL control circuit and a PLL control method reduces the frequency pull-in time due to frequency skip occurring when switching the PLL output frequency.

Abstract: In a mobile communication device having a first wireless section for a portable phone and a second wireless section for short range wireless data communication, the second wireless section is controlled by a control section so that it is intermittently put into an on-state under control of a control section in a standby state so as to reduce power consumption of the second wireless section. Such intermittent on-state is established by intermittently turning a battery of the second wireless section in the on-state by the control section. The second wireless section may be controlled individually from or dependently on the first wireless section.

Abstract: In a mobile telephone system including a mobile telephone base station (20) connected to a telephone network (40) and a mobile telephone apparatus (10) which includes a first GPS unit for receiving a GPS wave as a first received GPS signal to obtain position data of the mobile telephone apparatus by information processing with reference to the first received GPS signal and a radio section for transmitting, by radio communication, the position data of the mobile telephone apparatus to the mobile telephone base station to make the mobile telephone base station inform the telephone network of the position data of the mobile telephone apparatus, the mobile telephone base station includes a mobile telephone base section for transmitting, by radio communication, position information of the mobile telephone base station to the mobile telephone apparatus to enable the mobile telephone apparatus to use the position information of the mobile telephone base station instead of the position data of the mobile telephone ap

Abstract: A digital demodulator for demodulating a digital-Modulated signal into received data using differential detection includes a clock recovery circuit where a phase of the clock is adjustable in steps of a clock corrective width. A variance calculator is further included for calculating a variance of phase differences in the digital-modulated signal. The clock corrective width of the clock recovery circuit is controlled based on the variance and the received signal strength such that the clock corrective width is decreased when it is determined from the variance and the received signal strength that interference occurs.

Abstract: A cellular telephone system includes a plurality of base stations which cover a plurality of cells. The system also includes a plurality of portable telephones communicable with the base station over radio frequency channels. A base station covering a given cell transmits an IM control signal indicating that there exists IM interference in the given cell. In response to the IM control signal, each of the portable telephones reduces its receiver sensitivity, so that the IM interference can be alleviated.

Abstract: A mobile station for an automobile telephone system comprises a main unit and a telephone set connected to the main unit, for instance, by a curl cord. The main unit includes a power supply which is turned on from the telephone set, a controller for controlling the power supply to be turned on and off in accordance with a control signal supplied from the telephone set, and a detecting circuit for detecting the separation of the telephone set from the main unit. When the detecting circuit detects the separation of the telephone set from the main unit, the controller controls the power supply to be turned off, even if a power supply turning-off signal is not produced in the telephone set.