Global patent index - EP 1072098 A1

EP 1072098 A1 2001-01-31 - 45 DEGREE PHASE AMBIGUITY RESOLUTION FOR 8PSK MODULATION

Title (en)

45 DEGREE PHASE AMBIGUITY RESOLUTION FOR 8PSK MODULATION

Title (de)

AUFLÖSUNG VON 45 GRAD PHASENMEHRDEUTIGKEIT FÜR 8PSK MODULATION

Title (fr)

LEVEE D'AMBIGUITE DES PHASES A 45 DEGRES DESTINEE A LA MODULATION 8-MDP

Publication

EP 1072098 A1 (EN)

Application

EP 99916691 A

Priority

  • US 9908342 W
  • US 8220098 P

Abstract (en)

[origin: WO9955009A1] A method and apparatus for 45 DEG phase ambiguity resolution for one coded bit per symbol 8PSK modulation resolves phase ambiguity by selection of pre-differential encoders. A treillis encoder for 8PSK modulation of the type in which input data bits are encoded to a three-bit symbols includes a differential encoder, a convolutional encoder and first and second encoding assemblies. A decoder for decoding treillis coded data of 8PSK modulation includes a Viterbi decoder, a differential decoder, a convolutional decoder and first and second decoder assemblies. Each of the encoding and decoding assemblies includes multiplexing logic for selecting from among possible data paths according to a phase invariant scheme.

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

H03M 13/00; H04L 27/18

IPC 8 full level (invention and additional information)

H03M 13/00 (2006.01); H04L 27/18 (2006.01)

CPC (invention and additional information)

H03M 13/00 (2013.01); H04L 27/18 (2013.01)

Citation (search report)

See references of WO 9955009A1

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 9955009 A1 19991028; AU 3495099 A 19991108; EP 1072098 A1 20010131

INPADOC legal status

2002-01-02 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20010620

2001-03-28 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010209

2001-01-31 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001018

2001-01-31 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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