Title:
CONTROL LINE TRANSMISSION SYSTEM
Document Type and Number:
Japanese Patent JPH01194620
Kind Code:
A
Abstract:
PURPOSE:To set a control line having the same lines as the number of multi- carriers by carrying out frequency modulation(FM) by every independent control line signal of the multi-carrier by means of the phase modulating circuit(MOD) at every multi-carrier, and demodulating the FM-processed signal at every phase demodulating circuit(DEM) corresponding to each MOD. CONSTITUTION:In respective circuits MOD 201 and 202, the FM is processed by each independent ASC signal at every multi-carrier, and the FM is carried out by each ASC signal in an intermediate frequency band on the side of transmitters 301 and 302. Thus, the FM by different ASC(analog service channel) signals at every multi-carrier is processed. Demodulation is carried out in corresponding circuits DEM 501 and 502, and the different ASC signals in the respective circuit DEM 501 and 502 can be obtained. Consequently, the multi-carrier is at four waves, the ASC can be set at lines corresponding to it.
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Inventors:
KUBO NAOTO
Application Number:
JP1882488A
Publication Date:
August 04, 1989
Filing Date:
January 29, 1988
Export Citation:
Assignee:
NEC CORP
International Classes:
H04J1/00; (IPC1-7): H04J1/00
Domestic Patent References:
| JPS4925808A | 1974-03-07 | |||
| JPS5126410A | 1976-03-04 | |||
| JPS63114430A | 1988-05-19 |
Attorney, Agent or Firm:
Masaki Yamakawa (2 outside)
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