Hitachi, Ltd.

Samsung Electronics Co., Ltd.

Kazutoshi Higuchi

Yasuaki Takahara

Teiji Okamoto

Fumitaka Itoh

Katsuo Ogawa

Yoshihiro Kanomata

Hiroyuki Tomihara

Munetaka Tsuda

Shigeyuki Sudo

Osamu Hikino

Jun'ichi Nakagawa

Tsutomu Yamaguchi

Fuminori Itukaiti

A cellular mobile telephone apparatus has circuits for generating messages, a storage circuit for storing messages, and transmitter/receiver circuit for transmitting a message. When the user of the cellular mobile telephone apparatus cannot immediately respond to an incoming call, a desired one of a plurality of previously generated and stored messages can be transmitted to a calling party through simple key manipulations or by other means.

Message transmitter and response message transmitting method in cellular mobile telephone apparatus and recording medium recording program for executing the method

Response message transmitter and response message transmitting method in cellular mobile telephone apparatus and recording medium recording program for executing the method

A cellular phone capable of informing a user of the deterioration of a line speech quality by raising an alarm. In the cellular phone according to the present invention, the condition in which the saturation of a transmission output lasts for a predetermined period of time or longer is detected, and a deterioration in the uplink speech quality is thereby predicted, an alarm signal being sent out to the cellular phone. Thus, the user is notified that a deterioration in the uplink speech quality occurs.

Portable mobile unit

In a multi-band radio terminal apparatus, when communication frequency bands are switched, a reception intermediate frequency is selected to be equal to each other in respective communication frequency bands. As a result, the circuit arrangements of this multi-band radio terminal apparatus succeeding to the intermediate frequency signal circuit stage are commonly used in the respective communication frequency bands. While a local oscillator signal is produced by a voltage-controlled oscillator, a phase-locked loop, and a doubler, in a case where communication is established within a plurality of communication frequency bands, the transmission/reception frequency intervals are different from each other. A mixer for a reception system and a mixer for a transmission system are commonly used so as to convert the frequency of the local oscillator signal into a frequency existing between the communication frequency and the intermediate frequency.

Multi-band radio terminal apparatus

In a multi-band radio terminal apparatus, even when communication frequency bands are switched, a reception intermediate frequency is selected to be equal to each other in the respective different communication frequency bands. The circuit arrangements of this multi-band radio terminal apparatus succeeding to the intermediate frequency signal circuit state are commonly used in the respective communication frequency bands. A local oscillator signal is produced by a voltage-controlled oscillator, a phase-locked loop, and a doubler, such that a communication is established within a plurality of communication frequency bands, the transmission/reception frequency intervals of which are different from each other. A mixer for reception system and a mixer for a transmission system are commonly used to convert the frequency of the local oscillator signal into a frequency existing between the communication frequency and the intermediate frequency.

A cellular mobile telephone apparatus has circuits for generating massages, a storage circuit for storing messages, and a transmitter/receiver circuit for transmitting a message. When the user of the cellular mobile telephone apparatus cannot immediately respond to an incoming call, a desired one of a plurality of previously generated and stored messages can be transmitted to a calling party through simple key manipulations or by other means.

Cellular mobile telephone apparatus

A cellular mobile telephone apparatus has circuits for generating messages, a storage circuit for storing messages, and transmitter/receiver circuit or transmitting a message. When the user of the cellular mobile telephone apparatus cannot immediately respond to an incoming call, a desired one of a plurality of previously generated and stored messages can be transmitted to a calling party through simple key manipulations or by other means.

A cellular mobile telephone system including a cellular mobile telephone apparatus and a peripheral apparatus communicating bidirectionally. The cellular mobile telephone apparatus may include: a modulating/demodulating device demodulating radio frequency signals into a digital signal including a control signal; a controlling device controls operation of the cellular mobile telephone apparatus in accordance with the control signal; a first communicating device performs bidirectional communication, including transmitting a first control information controlling operation of the peripheral apparatus. The peripheral apparatus may include: an inputting device for inputting a second control information; a second communication device performing bidirectional communication with the cellular mobile telephone apparatus; and a control device controlling operation of the peripheral apparatus in accordance with the first control information, and performing control of the cellular mobile telephone apparatus through the communication device according to the second control information for changing a mode of the cellular mobile telephone apparatus.

Cellular mobile telephone apparatus and an alarm device therefor

A mobile station for preventing reduction of the line quality when it is used near the head of a human operator. Plural antennas are arranged so that the cross-correlation of the received waves becomes small. The signals received by the antennas are delayed by a delay time to prevent interference between the received signals so that the time difference of each received signal becomes at least one chip time of the spreading code or more. After that, a combiner combines the received signals, and an output signal of the combiner is inputted into a rake receiver. A reduction of the extent of the delay spreading is prevented by directivity of the antennas in use near a human body, and a decline of path diversity gain by the rake receiving is reduced.

Mobile station for spread spectrum communication

In a multi-band radio terminal apparatus, even when communication frequency bands are switched, a reception intermediate frequency is selected to be equal to each other in the respective different communication frequency bands. As a result, the circuit arrangements of this multi-band radio terminal apparatus succeeding to the intermediate frequency signal circuit stage are commonly used in the respective communication frequency bands, and can be made simple. To this end, while a local oscillator signal is produced by a voltage-controlled oscillator, a phase-locked loop, and a doubler, in such a case that a communication is established within a plurality of communication frequency bands, the transmission/reception frequency intervals of which are different from each other, a mixer for a reception system and a mixer for a transmission system are commonly used so as to convert the frequency of the local oscillator signal into such a frequency existing between the communication frequency and the intermediate frequency.

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Yokohama, Japan

Kazutoshi Higuchi