Blockwise Noncoherent AWGN Channel: Concatenated Codes and Composite Capacity

Konferenz: SCC 2013 - 9th International ITG Conference on Systems, Communication and Coding
21.01.2013 - 24.01.2013 in München, Deutschland

Tagungsband: SCC 2013

Seiten: 6Sprache: EnglischTyp: PDF

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Matuz, Balázs; Liva, Gianluigi (Deutsches Zentrum für Luft- und Raumfahrt (DLR), 82234 Wessling, Germany)
Paolini, Enrico; Chiani, Marco (DEI, University of Bologna, 47521 Cesena (FC), Italy)
Bauch, Gerhard (Technische Universität Hamburg-Harburg, Germany)

We consider binary phase shift keying (BPSK) over an additive white Gaussian noise (AWGN) channel with constant, but unknown carrier phase over blocks of nI channel symbols and a concatenated coding scheme. The composite capacity of the channel constrained to specific binary inner codes, i.e. codes with good minimum distance properties, is derived. The outer code is chosen from the ensemble of non-binary regular (2, dc) low-density parity-check (LDPC) codes with fixed variable node degree of 2 and check node degree dc. Iterative decoding thresholds obtained by means of density evolution are provided for several concatenations of inner and outer codes and are compared with capacity results.