Title:
パルス幅変調を用いたデータ伝送
Document Type and Number:
Japanese Patent JP2004505506
Kind Code:
A
Abstract:
A digital data modulator is coupled to a source of a digital data signal. An encoder encodes the digital data using a variable pulse width code. A pulse signal generator generates pulses representing edges of the encoded digital data signal. A carrier signal generator generates a carrier signal having carrier pulses corresponding to the pulses from the pulse signal generator. A corresponding digital data demodulator is coupled to a source of a modulated signal having carrier pulses spaced relative to each other to represent a variable pulse width encoded digital data signal. A detector generates a variable pulse width encoded signal in response to received carrier pulses. A decoder decodes the variable pulse width encoded signal to generate the digital data signal.
Inventors:
Chandra Mohan
Chin Minh James Chan
Jayanta Majumudar
Chin Minh James Chan
Jayanta Majumudar
Application Number:
JP2002514974A
Publication Date:
February 19, 2004
Filing Date:
July 20, 2001
Export Citation:
Assignee:
Thomson Licensing S.A.
International Classes:
H04N7/173; G06F11/10; G06F15/00; G09C1/00; G11B20/10; G11B20/14; G11B20/18; H03L7/091; H03M13/03; H03M13/13; H03M13/23; H03M13/29; H04B7/005; H04B7/24; H04B7/26; H04B14/00; H04H60/72; H04J13/16; H04L9/00; H04L9/08; H04L9/10; H04L9/32; H04L12/24; H04L12/54; H04L25/03; H04L25/49; H04L25/497; H04L27/10; H04L27/156; H04L27/18; H04L29/06; H04M1/66; H04M1/72415; H04N7/26; H04N7/52; H04W4/06; H04W4/12; H04W4/14; H04W8/02; H04W8/16; H04W8/20; H04W12/06; H04W12/10; H04W24/00; H04W40/22; H04W76/02; H04W80/06; H04W84/12; H04W88/02; G11B20/22; H04L1/00; H04W8/24; H04W8/26; H04W72/04; (IPC1-7): H04L27/18; H04L27/10
Domestic Patent References:
| JP2004510362A | 2004-04-02 | |||
| JP2004509487A | 2004-03-25 | |||
| JPS58173947A | 1983-10-12 | |||
| JP4745593B2 | 2011-08-10 | |||
| JP2000106543A | 2000-04-11 | |||
| JPS4875109A | 1973-10-09 | |||
| JPS5814638A | 1983-01-27 |
Foreign References:
| WO2002009379A2 | 2002-01-31 | |||
| EP1303958B1 | 2006-10-04 | |||
| WO1999046861A1 | 1999-09-16 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe