| 摘要 |
PROBLEM TO BE SOLVED: To realize a base station with a small size at a low cost even in a case of extension of channels. SOLUTION: Two time division multiplexer circuits 222 form time slots by n-channel each respectively and output to a modulation circuit 224 every 1/2 period. Thus, the time slots are modulated each in an allocating frequency channel. A transmission amplifier circuit 232 amplifies power of consecutive transmission slots from the modulation circuit 224 and the amplified slot is sent to a communication area from an antenna system 236 through a transmission antenna connection circuit 234. A mobile station receives a prescribed time slot and sends an incoming time slot with the same frequency as that of the prescribed time slot after a 1/2 period. Since a frequency of an outgoing time slot from a base station differs from a frequency of a time slot from the mobile station, the time slots are smoothly received respectively without interference. As a result, channel as two times of (n) channels is multiplexed onto one frame and the method is realized by the single base station. |
