Transmission equipment for efficiently transmitting communication traffic through phase-modulated carrier signal |
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| 申请号 | JP24538689 | 申请日 | 1989-09-22 | 公开(公告)号 | JPH02180453A | 公开(公告)日 | 1990-07-13 |
| 申请人 | Hughes Network Syst Inc; | 发明人 | GUREGORII JIYON AANSUTO; DANIERU MATSUKUREITO FURARII J; | ||||
| 摘要 | PURPOSE: To save the power and to reduce the cost of a transmitter by using a class 'C' amplifier and correcting a generated nonlinear phase characteristic. CONSTITUTION: A PROM 13 generates a data value for execution of prescribed phase shift to offset the phase shift of a class 'C' amplifier 19 and a required extent of phase shift indicating the phase state of input data. Therefore, the class 'C' amplifier 19 can be used to effectively amplify and transmit a phase- modulated carrier signal which has a required modulated envelope function. Amplitude modulation in the class 'C' amplifier 19 doesn't cause any phase distortion, as the result, in an input carrier signal which carries telephone traffic as a phase modulation component. Consequently, an improved transmission equipment having a high power efficiency and a practically low production cost is provided. COPYRIGHT: (C)1990,JPO |
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