SYSTEM FOR THE PARALLEL TRANSMISSION OF SIGNALS

• US 3,622,885 A
• Filed: 07/22/1969
• Issued: 11/23/1971
• Est. Priority Date: 07/26/1968
• Status: Expired due to Term

• Current Assignee: Ekkehard A. Wildhaber, Fritz Eggiman, Hans Van Der Floe, Tadeusz Kruszynski
• Original Assignee: Ekkehard A. Wildhaber, Fritz Eggiman, Hans Van Der Floe, Tadeusz Kruszynski
• Inventors: Kruszynski, Tadeusz, Van Der Floe, Hans, Eggiman, Fritz, Wildhaber, Ekkehard A.
• Primary Examiner(s): Safourek, Benedict V.
• Application Number:
  US04/843,594
• Time in Patent Office: 854 Days
• Field of Search: 325/30,38,40,42,44,59,60,61.65,52 178/66 179/15AA,15.55
• US Class Current: 375/260
• CPC Class Codes: C07D 209/72 4,7-Endo-alkylene-iso-indoles
• CPC Class Codes: H04B 7/005 Control of transmission; Equalising
• CPC Class Codes: H04J 4/005 Transmultiplexing

Abstract

A system for transmission of continuous signals wherein the signals are sampled into sections, which sections are subsequently assembled into groups. A frequency band is permanently associated with each section dependent upon its position within the group and for each section an alternatingcurrent pulse is produced, the frequency of said alternatingcurrent pulse being within the frequency band associated with said section and which contains the signal contents of the corresponding section. The alternating-current pulses are longer than the sections and are temporarily overlapping one another.

Claims

1. A system for transmitting a continuous signal which is split into equal sections and a sequence of the sections is converted into a pulse train having pulse locations corresponding to the length of said sections, with first pulses of said pulse train containing the information of the continuous signal and occurring at least at some of these locations, said system comprising first switch means reCeiving said continuous signal and dividing it into groups of first sections each having the same number of successive pulse locations, first storage means connected to said first switch means to store said first sections, second switch means connected to said first storage means and generating second sections in the form of AC pulses the frequencies of which are constant during the pulse duration and which lie within a frequency band associated with a pulse location, each group of pulse locations being associated with a selection of frequency bands common to all groups, and second storage means connected to said second switch means to extend the length of the second sections, which extended sections, correspond to the first sections forming a group, at least partially overlap one another chronologically.

2. A system according to claim 1, in which the second switch means further comprises means to delay the second sections with respect to the corresponding first sections belonging to a group by different delay times whereby the second sections corresponding to said group are given off in a stacked manner so that the signal consisting of the second sections can be used within a time multiplex system.

3. A system according to claim 1, further comprising means to produce third signal sections the length of which corresponds to the first sections and the frequencies of which are higher by a constant factor than those of the second signal, said second storage means comprising at least one static analog storage having switch means associated therewith to store said third signal sections additively in the analog storage in such a manner that they are each stored at the same storage places, and read out means which, after a pulse stack has been stored in said analog storage, read out said stored pulse stack at a speed which is less by said constant factor than the speed with which the individual sections were stored.

4. A system according to claim 2, further comprising means to delay said second sections and in which said second switch means further comprise means to associate the same frequency band with more than one second section and delay means to impart to those sections belonging to the same frequency band different delay times so that said second sections follow one another continuously, whereby the signal output consists of a gapless succession of partial stacks containing, in the different frequency bands, each a single second section.

5. A system according to claim 1, in which said first switch means further comprise means to split the continuous signal into a series of pulses of alternating amplitude thus forming said first sections, said second switch means comprising means to fix the frequency of the second sections in each case within the frequency band assigned to them in accordance with the amplitude of the corresponding first sections.

6. A system according to claim 1, further comprising third switch means to evaluate only a relatively short part from each second section received, the start of which is delayed with respect to the start of the second section by a constant amount of time whereby disturbances caused by multiwave propagations, the greatest difference in transmission time of which is smaller than said delay, will be cancelled.

7. A system according to claim 1, in which said first switch means further comprise means to convert the continuous signal into a series of delta-modulated pulses and said second switch means further comprise means to associate a frequency band with each pulse location of the delta modulation.

8. A system according to claim 7, in which said second switch means further comprises means to produce a second section in response to each of said delta-modulated pulses, the frequency of said second sections being in the frequency band associated with the pulse location of the corresponding pulse.

9. A system according to claim 7, in which said second switch means further comprise means which, for each pulse locatIon of the delta modulation, produces a second section the frequency of which, lying within the frequency band associated with it and depends on the production of a pulse at the corresponding pulse location.