The construction of space-time codes for wireless cooperative communications is investigated by considering a pragmatic approach based on the concatenation of convolutional codes and BPSK/QPSK modulation to obtain cooperative codes for relay networks. We also derive the pairwise error probability, an asymptotic bound for frame error probability and a design criterion to optimize both diversity and coding gain. This framework is useful to characterize the behavior of Cooperative Pragmatic Space-Time Codes (CP-STC) and to set up a code search procedure to obtain good pragmatic space-time codes (PSTC) with overlay construction (COP-STC) which are suitable for cooperative communication with a variable number of relays in quasi static channel. We find that P-STCs perform quite well in block fading channels, including quasi-static channel, even with a low number of states and relays, despite the fact that the implementation of P-STC requires common convolutional encoders and Viterbi decoders with suitable generators and rates, thus having low complexity.

Cooperative Relaying with Pragmatic Space-Time Codes

CONTI, Andrea;TRALLI, Velio;
2008

Abstract

The construction of space-time codes for wireless cooperative communications is investigated by considering a pragmatic approach based on the concatenation of convolutional codes and BPSK/QPSK modulation to obtain cooperative codes for relay networks. We also derive the pairwise error probability, an asymptotic bound for frame error probability and a design criterion to optimize both diversity and coding gain. This framework is useful to characterize the behavior of Cooperative Pragmatic Space-Time Codes (CP-STC) and to set up a code search procedure to obtain good pragmatic space-time codes (PSTC) with overlay construction (COP-STC) which are suitable for cooperative communication with a variable number of relays in quasi static channel. We find that P-STCs perform quite well in block fading channels, including quasi-static channel, even with a low number of states and relays, despite the fact that the implementation of P-STC requires common convolutional encoders and Viterbi decoders with suitable generators and rates, thus having low complexity.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/525908
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? ND
social impact