Analog radio system with acoustic transmission properties
作者： Grant McGibney
DOI:
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摘要: This invention modulates voice signals so that the radio waves behave same in medium as sound would acoustic medium. is accomplished by segmenting signal and compressing segments time before transmitting them through channel. If compression factor correct, distortion sounds natural to ear because characteristics of channel match those normally encountered The will then inherit many good properties including resistance flat fading tolerance frequency selective fading.
lens.org 参考文章(12)
Henry L. Kazecki, James C. Baker, Time division multiplex system suited for burst analog transmission ,(1989)
Atsuyoshi Niki, Sakari Ohira, Ichiro Maeda, Tsyneyuki Minowa, Radio communication apparatus and method for multiplex transmission of voice and data signals ,(1995)
Matti Lehtimäki, Transmission equipment for an interexchange connection ,(1997)
Richard J. Helferich, Variable speed transmission recording and retrieval of data ,(1987)
Sakari Ohira, Kouichi Ishikawa, O Fuji-Tekku Kabushiki K. Nakabayashi, Fujio C, O Fuji-Tekku Kabushiki Kaisha Sumi, Susumu C, Duplex voice communication radio transmitter-receiver ,(1991)
Katsumi Takahashi, Voice transmission method and apparatus in duplex radio system Journal of the Acoustical Society of America. ,vol. 98, pp. 30- 31 ,(1993) , 10.1121/1.413744
Mitsuo Shiraishi, Sakari Ohira, Kenichi Suzuki, Fujio Sumi, Osamu Suzuki, Kazuo Suzuka, Radio apparatus for simulataneously transmitting and receiving signals using a simple frequency ,(1994)
Robert John Schwendeman, Clifford Dana Leitch, Kazimierz Siwiak, Sunil Satyamurti, William Joseph Kuznicki, Voice compression method and apparatus in a communication system ,(1996)