Global Patent Index - EP 1101308 A1

EP 1101308 A1 2001-05-23 - OPTICAL CDMA SYSTEM

Title (en)

OPTICAL CDMA SYSTEM

Title (de)

OPTISCHES CDMA-SYSTEM

Title (fr)

SYSTEME OPTIQUE A ACCES MULTIPLE PAR CODE DE REPARTITION (AMCR)

Publication

EP 1101308 A1 (EN)

Application

EP 99937636 A

Priority

  • US 9917241 W
  • US 12631098 A

Abstract (en)

[origin: WO0007316A1] An optical fiber communications system uses spread spectrum code division multiple access techniques to achieve better bandwidth utilization. A single encoding mask having a first code is used to encode the optical signal. Light, spatially encoded by the mask and temporally modulated with data, is transmitted over a fiber link and received by a decoder. A polarization insensitive separator splits the received light into two equal power components which are provided to two decoding masks used to decode the signal. One of the masks has a second code identical to the first code and the other mask has a third code complementary to the first code. The output light beams filtered by the masks are differentially detected to generate an output signal, which is further processed for data recovery. The electrical signal is low pass filtered and electrically square law detected. The first codes are selected from a set of unipolar codes derived from a set of balanced bipolar orthogonal codes. The codes may be either binary or analog.

IPC 1-7 (main, further and additional classification)

H04J 11/00

IPC 8 full level (invention and additional information)

H04J 14/00 (2006.01); H04J 11/00 (2006.01); H04J 13/00 (2011.01); H04J 14/04 (2006.01); H04J 14/06 (2006.01)

CPC (invention and additional information)

H04J 14/007 (2013.01); H04J 13/00 (2013.01)

Citation (search report)

See references of WO 0007316A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0007316 A1 20000210; AU 5242899 A 20000221; CA 2338990 A1 20000210; EP 1101308 A1 20010523; JP 2002521956 A 20020716

INPADOC legal status


2002-08-28 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020201

2001-05-23 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010219

2001-05-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-05-23 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI