GB2003705A - Spread spectrum data transmission - Google Patents

Spread spectrum data transmission

Info

Publication number
GB2003705A
GB2003705A GB7834266A GB7834266A GB2003705A GB 2003705 A GB2003705 A GB 2003705A GB 7834266 A GB7834266 A GB 7834266A GB 7834266 A GB7834266 A GB 7834266A GB 2003705 A GB2003705 A GB 2003705A
Authority
GB
United Kingdom
Prior art keywords
signal
data transmission
spread spectrum
spectrum data
pulse train
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
GB7834266A
Other versions
GB2003705B (en
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.)
EMI Ltd
Original Assignee
EMI Ltd
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 EMI Ltd filed Critical EMI Ltd
Priority to GB7834266A priority Critical patent/GB2003705B/en
Publication of GB2003705A publication Critical patent/GB2003705A/en
Application granted granted Critical
Publication of GB2003705B publication Critical patent/GB2003705B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation

Abstract

Spectrum spreading of a signal a(n) for a data transmission link is realised by providing the signal as a bipolar waveform and modulating it on a fast pseudorandom bipolar binary pulse train. The pseudo-random pulse train is generated at least in part in response to the data signal to provide the spread spectrum signal b(n), Fig. 1. The signal a(n) is recovered in complementary manner, Fig. 2. <IMAGE>
GB7834266A 1977-08-27 1978-08-23 Data transmission Expired GB2003705B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7834266A GB2003705B (en) 1977-08-27 1978-08-23 Data transmission

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3610177 1977-08-27
GB7834266A GB2003705B (en) 1977-08-27 1978-08-23 Data transmission

Publications (2)

Publication Number Publication Date
GB2003705A true GB2003705A (en) 1979-03-14
GB2003705B GB2003705B (en) 1982-03-03

Family

ID=26262993

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7834266A Expired GB2003705B (en) 1977-08-27 1978-08-23 Data transmission

Country Status (1)

Country Link
GB (1) GB2003705B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423517A (en) * 1980-01-21 1983-12-27 Matsushita Electric Industrial Co., Ltd. Code sequence synchronization system for spread spectrum communication receiver
GB2233860A (en) * 1989-07-13 1991-01-16 Stc Plc "Extending the range of radio transmissions"
US7245721B1 (en) 1999-02-19 2007-07-17 Meridian Audio Ltd. Data encoding/decoding device and apparatus using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423517A (en) * 1980-01-21 1983-12-27 Matsushita Electric Industrial Co., Ltd. Code sequence synchronization system for spread spectrum communication receiver
GB2233860A (en) * 1989-07-13 1991-01-16 Stc Plc "Extending the range of radio transmissions"
GB2233860B (en) * 1989-07-13 1993-10-27 Stc Plc Communications systems
US7245721B1 (en) 1999-02-19 2007-07-17 Meridian Audio Ltd. Data encoding/decoding device and apparatus using the same

Also Published As

Publication number Publication date
GB2003705B (en) 1982-03-03

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920823