Kabushiki Kaisha Toshiba

Takumi Haga

Masayuki Tanaka

Arata Obayashi

Takashi Sakagawa

A radio communication apparatus of this invention includes a mode designation switch for selectively designating and inputting a desired mode from an analog mode and a digital mode, and a mode storage circuit for storing the desired mode designated and input by the mode designation switch and has a mode setting control function, a mode comparison function, and a mode change control function. In order to establish a radio link, control is performed to set a mode for transmitting a communication signal in accordance with the desired mode stored in the mode storage circuit. After the start of transmission of the communication signal, the mode comparison function compares the mode set by the mode setting control function with the desired mode stored in the mode storage circuit. If these modes are determined not to coincide with each other by the mode comparison function, control is performed to change the mode set by the mode setting control function to the desired mode stored in the mode storage circuit in accordance with the mode change control function.

Dual mode radio communication apparatus having function of selectively

In a digital communication apparatus, when a slot is received by a transmission system, two different data included in the received slot are stored in two data storage circuits, respectively, by a predetermined amount, and are read out therefrom at different times, that is, time-divisionally. An error in the data having different transfer formats read out from the two data storage circuits is detected by a CRC data decoder formed of a single circuit based on a detection code such as CRC (cyclic redundancy check) code.

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Tokyo, Japan

Takumi Haga