Duplex voice communication radio transmitter-receiver
作者： Sakari Ohira , Kouichi Ishikawa , O Fuji-Tekku Kabushiki K. Nakabayashi , Fujio C , O Fuji-Tekku Kabushiki Kaisha Sumi
DOI:
关键词: Duplex (telecommunications) 、 Frequency band 、 Acoustics 、 Radio wave 、 Transmitter 、 Intelligibility (communication) 、 Voice communication 、 Frequency modulation 、 Computer science
摘要: A duplex voice communication radio transmitter-receiver according to the present invention is provided with a low-pass filter (LPFQ) arranged before time compressing device (TOS) in transmitter section for cutting off higher frequency portion of band signal thus decreasing maximum modulation same less than half so that it can be operated use an assigned, single transmission wave which legally limited, improved utilization frequencies, minimized delay signals, and enhanced articulation intelligibility reproduced sound.
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