EP 1072098 A1 20010131 - 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
Application
Priority
- US 9908342 W 19990416
- US 8220098 P 19980417
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
IPC 8 full level
H03M 13/00 (2006.01); H04L 27/18 (2006.01)
CPC (source: EP)
H03M 13/256 (2013.01); H04L 27/186 (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
DOCDB simple family (publication)
WO 9955009 A1 19991028; AU 3495099 A 19991108; EP 1072098 A1 20010131
DOCDB simple family (application)
US 9908342 W 19990416; AU 3495099 A 19990416; EP 99916691 A 19990416