Title:
RADIO COMMUNICATION LINE CONTROL SYSTEM
Document Type and Number:
Japanese Patent JP3127741
Kind Code:
B2
Abstract:
PURPOSE: To attain high transmission efficiency by continuously changing the transmission frequency of a single frequency signal on a time axis in a request signal transmitting section, diffusing the frequency on a frequency axis and reversely diffusing the difused frequency in a master station.
CONSTITUTION: In a transmitter for a compact earth station, a line control circuit 39 always recognizes the transmission timing of a single frequency signal and an information data signal 42 from frame timing 38 and accurately control switching between a single frequency signal generator 31 and a data signal control circuit 43. A request signal generated from the generator 31 is continuously phase-shifted on the time axis by a phase shifter 33, the spectrum of the single frequency signal is continuously changed on the frequency axis and turned to a frequency-diffused signal equivalently diffusing its band width in a request section and the frequency diffused signal is multiplied by a high frequency signal to send the multiplied signal. On the other hand, a central earth station applies frequency conversion reversible to that executed at the time of transmitting a request signal to a received synthetic signal to execute reverse diffusion processing.
Inventors:
Hiroyasu Ishikawa
Hideo Kobayashi
Hideo Kobayashi
Application Number:
JP29035894A
Publication Date:
January 29, 2001
Filing Date:
November 01, 1994
Export Citation:
Assignee:
KDD Co., Ltd.
International Classes:
H04J3/16; H04B7/212; (IPC1-7): H04J3/16; H04B7/212
Domestic Patent References:
| JP7154363A | ||||
| JP585066A | ||||
| JP57142046A | ||||
| JP818596A | ||||
| JP7303090A | ||||
| JP6335025A | ||||
| JP61228733A | ||||
| JP63246936A |
Attorney, Agent or Firm:
Keiichi Yamamoto