TRANSMISSION SYSTEM FOR A TIME-DIVISIONAL MULTIPLEX PSK SIGNAL

• US 3,777,062 A
• Filed: 07/17/1972
• Issued: 12/04/1973
• Est. Priority Date: 07/20/1971
• Status: Expired due to Term

• Current Assignee: Akira Ogawa
• Original Assignee: Akira Ogawa
• Inventors: Ogawa, Akira
• Primary Examiner(s): Richardson, Robert L.
• Application Number:
  US05/272,345
• Time in Patent Office: 505 Days
• Field of Search: 178/69.5R,66R 325/30 179/15BS
• US Class Current: 370/215
• CPC Class Codes: H04B 7/2125 Synchronisation
• CPC Class Codes: H04J 3/0602 Systems characterised by the synchronising information used
• CPC Class Codes: H04L 5/22 using time-division multiplexing

Abstract

A transmission system for a time-divisional multiplex PSK signal including a frame synchronization signal in addition to information channel signals, in which the number of quantum phase positions of the frame synchronization signal is smaller than the number of quantum phase positions of the information channel signals in the time-divisional multiplex PSK signal so that the frame synchronization signal and the information channel signals are transmitted by the same modulation rate.

Claims

1. A transmission system for a time-divisional multiplex PSK signal including a frame synchronization signal in addition to information channel signals, comprising:

input terminal means for receiving an information channel signal;

first generator means for generating clock pulse timed with the clock timing of the information channel signal;

second generator means for generating a frame synchronization signal timed with the clock timing of the information channel signal so that the frame synchronization signal is formed by successive combinations of adjacent two signal elements having the same state;

combine means coupled with said input terminal means, said first generator means and second generator means for combining the information channel signal, the clock pulses and the frame synchronization signal in the predetermined order so as to produce a combined signal;

modulation means coupled to said combine means for providing a phase-modulated wave, in which the number of quantum phase positions of the frame synchronization signal is smaller than the number of quantum phase positions of the information channel signal; and

output terminal means for transmitting the phase-modulated wave for providing the time-divisional multiplex PSK signal.

2. A transmission system according to claim 1, in which the number of quantum phase positions of the frame synchronization signal is two while the number of quantum phase positions of the information channel signal is four.

3. A transmission system according to claim 1, in which the number of quantum phase positions of the frame synchronization signal is two while the number of quantum phase positions of the information channel signal is eight.

4. A transmission system according to claim 1, in which the number of quantum phase positions of the frame synchronization signal is two while the number of quantum phase positions of the information channel signal is 2n, where '"'"''"'"''"'"''"'"'n'"'"''"'"''"'"''"'"' is a positive integer more than three.