| 摘要 |
PURPOSE:To provide a mobile station with excellent reliability such as a temperature characteristic for the TDMA communication system. CONSTITUTION:A transmission section of a mobile station is provided with a filter ROM 21 in which a preset route roll-off characteristic is stored and a burst ROM 22 storing a prescribed Hanning function. With a digital data signal given to the filter ROM 21, a filter signal is outputted in response to the route roll-off characteristic by using the digital data signal as its address. When a burst transmission control signal representing a transmission ON/OFF is given to the burst ROM 22 and the burst transmission control signal is switched from OFF to ON or vice versa, a burst signal whose ramp period representing a leading or trailing is specified based on a Hanning function is outputted. Then the burst signal and the filter signal are multiplied by a digital multiplier 23, the product is converted into an analog signal by a D/A converter 24 and the signal is sent through a channel allocated in advance.
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