Title:
DIGITAL SIGNAL TRANSMITTING METHOD
Document Type and Number:
Japanese Patent JPS5860848
Kind Code:
A
Abstract:
In order to achieve a higher resistance to interference with respect to alien sources of deliberate interference in the use of communication connections via short waves, certain cooperative measures are proposed which include that the stations are equipped with highly-constant quartz crystal clocks and the bursts of information to be transmitted are accompanied by a time signal with the aid of which it is possible to correct any time tolerances between the stations. With an acknowledgment signal, use is made of a frequency variation of the radio frequency in the timing of consecutive burst transmissions including the acknowledgment response. The information contained in a burst in a fault safeguarded fashion is transmitted in coded form. The code sequence for encoding the information component and the fault safeguarding component of a burst and for the frequency address which determines the transmitting and receiving frequencies is recalculated for each burst on the basis of the clock time of the quartz crystal clock and on the basis of a subscriber number.
Inventors:
MANFUREETO HANI
YOOZEFU BURUTSUSHIYU
YOOZEFU BURUTSUSHIYU
Application Number:
JP15897382A
Publication Date:
April 11, 1983
Filing Date:
September 14, 1982
Export Citation:
Assignee:
SIEMENS AG
International Classes:
H04K1/00; H04K3/00; H04L1/16; H04L1/18; H04L7/10; H04L9/06; H04L9/12; H04L9/14; H04L9/32; (IPC1-7): H04L1/16; H04L9/00
Domestic Patent References:
| JPS4960103A | 1974-06-11 | |||
| JPS4948243A | 1974-05-10 | |||
| JPS54114901A | 1979-09-07 |
Attorney, Agent or Firm:
Toshio Yano