TY - GEN
T1 - Decode-and-forward differential modulation scheme with threshold-based decision combining
AU - Himsoon, Thanongsak
AU - Siriwongpairat, W. Pam
AU - Su, Weifeng
AU - Liu, K. J.Ray
PY - 2006
Y1 - 2006
N2 - This paper proposes a threshold-based differential decode-and-forward cooperative scheme that efficiently exploits the cooperative relay channels via the use of a pre-determined decision threshold. In the proposed scheme, the source information is forwarded by the relay only if it is correctly decoded. The properly-designed threshold enables the destination to decide whether the received signal from the relay contains information such that the received signals from the source and the relay can be efficiently combined and jointly decoded. The bit error rate (BER) analysis of the proposed scheme is analyzed in case of differential M-ary phase shift keying signals. A tight BER approximation is established, and BER upper bound and lower bound are determined. Based on the tight BER approximation, joint optimum decision threshold and power allocation is numerically evaluated. Both analytical and simulation results reveal that the decision threshold and the power allocation depend on channel link qualities. Interestingly, when the link quality between the relay and the destination is very good, the effect of the threshold dominates the effect of the power allocation at high signal-to-noise ratio. Extensive simulation results are provided to validate the merit of the proposed scheme and confirm the theoretical analysis.
AB - This paper proposes a threshold-based differential decode-and-forward cooperative scheme that efficiently exploits the cooperative relay channels via the use of a pre-determined decision threshold. In the proposed scheme, the source information is forwarded by the relay only if it is correctly decoded. The properly-designed threshold enables the destination to decide whether the received signal from the relay contains information such that the received signals from the source and the relay can be efficiently combined and jointly decoded. The bit error rate (BER) analysis of the proposed scheme is analyzed in case of differential M-ary phase shift keying signals. A tight BER approximation is established, and BER upper bound and lower bound are determined. Based on the tight BER approximation, joint optimum decision threshold and power allocation is numerically evaluated. Both analytical and simulation results reveal that the decision threshold and the power allocation depend on channel link qualities. Interestingly, when the link quality between the relay and the destination is very good, the effect of the threshold dominates the effect of the power allocation at high signal-to-noise ratio. Extensive simulation results are provided to validate the merit of the proposed scheme and confirm the theoretical analysis.
UR - https://www.scopus.com/pages/publications/34250363643
U2 - 10.1109/wcnc.2006.1683639
DO - 10.1109/wcnc.2006.1683639
M3 - Conference contribution
AN - SCOPUS:34250363643
SN - 1424402700
SN - 9781424402700
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 1189
EP - 1194
BT - 2006 IEEE Wireless Communications and Networking Conference, WCNC 2006
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2006 IEEE Wireless Communications and Networking Conference, WCNC 2006
Y2 - 3 April 2006 through 6 April 2006
ER -