GB1499099A - Electrical signal code generator arrangements - Google Patents

Electrical signal code generator arrangements

Info

Publication number
GB1499099A
GB1499099A GB220972A GB220972A GB1499099A GB 1499099 A GB1499099 A GB 1499099A GB 220972 A GB220972 A GB 220972A GB 220972 A GB220972 A GB 220972A GB 1499099 A GB1499099 A GB 1499099A
Authority
GB
United Kingdom
Prior art keywords
code
generator
shift
electrical signal
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB220972A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1499099A publication Critical patent/GB1499099A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/84—Generating pulses having a predetermined statistical distribution of a parameter, e.g. random pulse generators

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

1499099 Producing pulse trains SIEMENS AG 17 Jan 1972 [29 April 1971] 2209/72 Heading H3P An electrical signal code generator arrangement comprises a code-generator 1 and a sequential network 2 comprising a cascade of shift-register stages 51, 52 ... (5n-1) interconnected by halfadders 61, ... (6n-2)(6n-1) and and-gates 41, 42 ... (4n-1), 4n each of which has one control input h1, h2 ... (hn-1), hn respectively, one input from the code-generator and one output to the input stage of the cascade (in the case of and-gate 41) and to respective half-adders (in the case of and-gates 42 ... 4n). The code-generator and each shift-register stage receives timing pulses on line 3 and the shift-register stages also receive resetting pulses on line 7. The control inputs h1, h2 ... hn provide a code address and control inputs Cl, C2 ... Cn to the code-generator represent a code key. The code-generator produces a linear code which is delayed by the sequential network. The generator itself may comprise a sequential network with internal feedback. The arrangement may be used in SSMA communications systems.
GB220972A 1971-04-29 1972-01-17 Electrical signal code generator arrangements Expired GB1499099A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712121117 DE2121117C1 (en) 1971-04-29 1971-04-29 Electrical circuit with a code generator

Publications (1)

Publication Number Publication Date
GB1499099A true GB1499099A (en) 1978-01-25

Family

ID=5806369

Family Applications (1)

Application Number Title Priority Date Filing Date
GB220972A Expired GB1499099A (en) 1971-04-29 1972-01-17 Electrical signal code generator arrangements

Country Status (5)

Country Link
DE (1) DE2121117C1 (en)
FR (1) FR2354687A5 (en)
GB (1) GB1499099A (en)
IT (1) IT1019527B (en)
NL (1) NL155148C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2124320C1 (en) * 1971-05-17 1978-04-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen Electrical circuit for generating a large number of different codes
DE3023375C1 (en) * 1980-06-23 1987-12-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De

Also Published As

Publication number Publication date
NL155148C (en) 1978-04-17
FR2354687A5 (en) 1978-01-06
DE2121117C1 (en) 1978-02-09
IT1019527B (en) 1977-11-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee