TY - JOUR

T1 - Distributed orthogonal and quasi-orthogonal space-time block code with embedded AAF/DAF matrix elements in wireless relay networks with four relays

AU - Tseng, Shu Ming

AU - Liao, Che Ying

PY - 2014/3

Y1 - 2014/3

N2 - We consider cooperative networks of one source, four relays, and one destination. Each of them has a single antenna. The four relays use a proposed full rate distributed quasi orthogonal space time block code (DQOSTBC) scheme. If the channel state between the source and a relay is above a threshold, we select the elements of the DQOSTBC matrix to be the decode-and-forward (DAF) type; if it is below the threshold, the corresponding elements are the amplify-and-forward (AAF) type. Thus the proposed scheme is a DQOSTBC matrix with embedded adaptive DAF/AAF elements. The bit error rate (BER) simulation results show that the proposed DQOSTBC is approximately 7 dB better than the traditional DQOSTBC (all matrix elements are fixed as DAF type) at a BER of 10-3 because traditional DQOSTBC loses full diversity due to errors in the information received. The proposed DQOSTBC is about 3 dB better than the rate 1/2 DOSTBC also proposed with adaptive DAF/AAF matrix elements at a BER of 10-3 at the same spectral efficiency of 2 bits/s/Hz.

AB - We consider cooperative networks of one source, four relays, and one destination. Each of them has a single antenna. The four relays use a proposed full rate distributed quasi orthogonal space time block code (DQOSTBC) scheme. If the channel state between the source and a relay is above a threshold, we select the elements of the DQOSTBC matrix to be the decode-and-forward (DAF) type; if it is below the threshold, the corresponding elements are the amplify-and-forward (AAF) type. Thus the proposed scheme is a DQOSTBC matrix with embedded adaptive DAF/AAF elements. The bit error rate (BER) simulation results show that the proposed DQOSTBC is approximately 7 dB better than the traditional DQOSTBC (all matrix elements are fixed as DAF type) at a BER of 10-3 because traditional DQOSTBC loses full diversity due to errors in the information received. The proposed DQOSTBC is about 3 dB better than the rate 1/2 DOSTBC also proposed with adaptive DAF/AAF matrix elements at a BER of 10-3 at the same spectral efficiency of 2 bits/s/Hz.

KW - Cooperative networks

KW - Distributed coding

KW - Information receiving error

UR - http://www.scopus.com/inward/record.url?scp=84898835502&partnerID=8YFLogxK

U2 - 10.1007/s11277-013-1415-2

DO - 10.1007/s11277-013-1415-2

M3 - 文章

AN - SCOPUS:84898835502

SN - 0929-6212

VL - 75

SP - 1187

EP - 1198

JO - Wireless Personal Communications

JF - Wireless Personal Communications

IS - 2

ER -