JPS57199355A - Spread spectrum communication system - Google Patents

Spread spectrum communication system

Info

Publication number
JPS57199355A
JPS57199355A JP56082568A JP8256881A JPS57199355A JP S57199355 A JPS57199355 A JP S57199355A JP 56082568 A JP56082568 A JP 56082568A JP 8256881 A JP8256881 A JP 8256881A JP S57199355 A JPS57199355 A JP S57199355A
Authority
JP
Japan
Prior art keywords
circuit
circuits
delay
coefficients
uneven
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.)
Granted
Application number
JP56082568A
Other languages
Japanese (ja)
Other versions
JPH0253981B2 (en
Inventor
Makoto Omura
Hajime Marubayashi
Shinichi Tachikawa
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP56082568A priority Critical patent/JPS57199355A/en
Publication of JPS57199355A publication Critical patent/JPS57199355A/en
Publication of JPH0253981B2 publication Critical patent/JPH0253981B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To improve the generation establishment of energy of step-out and a correlative peak value to output many codes of the best characteristic, by making delay times of circuits, which constitute a row of delay circuits, uneven and making coefficients of coefficient multipliers uneven in the spread vector communication system. CONSTITUTION:Information from an information source 1 is sampled by clocks of a transmission-side clock circuit 5 in a sampling circuit 2 and is applied to a signal spreading circuit 3, and an encoded signal from the circuit 3 is transmitted to a receiving-side signal processing spreading circuit 7 through a transmission line 6. Delay circuits 12-14 having delay times tau1-taun connected in series to the circuit 3, product circuits 15-17 having coefficients C1-Cn connected to connection points of circuits 12-14, and a signal adding circuit 19 which operates the sum of product circuits 15-17 and transmits it to the transmission line 6 are provided. The receiving-side circuit 7 is provided with the circuit 3 and delay and product circuits having the reverse constitution. Delay times and coefficients of product circuits are made uneven respectively to improve the generation establishment of energy of step-out and a correlative peak value.
JP56082568A 1981-06-01 1981-06-01 Spread spectrum communication system Granted JPS57199355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56082568A JPS57199355A (en) 1981-06-01 1981-06-01 Spread spectrum communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56082568A JPS57199355A (en) 1981-06-01 1981-06-01 Spread spectrum communication system

Publications (2)

Publication Number Publication Date
JPS57199355A true JPS57199355A (en) 1982-12-07
JPH0253981B2 JPH0253981B2 (en) 1990-11-20

Family

ID=13778086

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56082568A Granted JPS57199355A (en) 1981-06-01 1981-06-01 Spread spectrum communication system

Country Status (1)

Country Link
JP (1) JPS57199355A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6097713A (en) * 1996-12-17 2000-08-01 Nec Corporation CDMA multi-code transmitter employing baseband signal time offset
US7274729B2 (en) 1997-07-21 2007-09-25 Hitachi, Ltd. Spread spectrum communication device and communication system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558612A (en) * 1978-10-26 1980-05-01 Kokusai Denshin Denwa Co Ltd <Kdd> Delay circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558612A (en) * 1978-10-26 1980-05-01 Kokusai Denshin Denwa Co Ltd <Kdd> Delay circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6097713A (en) * 1996-12-17 2000-08-01 Nec Corporation CDMA multi-code transmitter employing baseband signal time offset
US7274729B2 (en) 1997-07-21 2007-09-25 Hitachi, Ltd. Spread spectrum communication device and communication system

Also Published As

Publication number Publication date
JPH0253981B2 (en) 1990-11-20

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