TY - JOUR
T1 - Performance analysis of multi-branch multi-hop wireless relay systems over log-normal channels
AU - Pan, Gaofeng
AU - Ekici, Eylem
AU - Feng, Quanyuan
PY - 2014/1
Y1 - 2014/1
N2 - In this paper, analytical models are proposed to study the performance of amplify-and-forward (AF) multi-branch multi-hop (MBMH) wireless relay systems (WRS) over log-normal fading channels. The presented analytical models are used to estimate the end-to-end performance of the MBMH WRS with maximal ratio combining (MRC) and selection combining (SC) schemes. In particular, we derive closed-form expressions for the parameters of the end-to-end signal-to-noise ratio (SNR) of an AF multi-hop chain relay link. Further, we characterize the distribution of the end-to-end SNR and derive closed-form expressions for the mean and standard deviation of the end-to- end SNR's natural logarithm for AF MBMH WRS with MRC scheme, and the probability density function (pdf) for the end-to-end SNR of AF MBMH WRS with SC scheme. Then, under MRC and SC schemes, we analyze the diversity gain by adopting asymptotical relative diversity order (ARDO) and develop accurate analytical expressions for average bit error probability, outage probability, and ergodic capacity, respectively. Our analysis reveals that the computational complexity of the proposed models is acceptably low for practical applications. Numerical and Monte Carlo simulation results are presented to substantiate the accuracy of the proposed analytical models.
AB - In this paper, analytical models are proposed to study the performance of amplify-and-forward (AF) multi-branch multi-hop (MBMH) wireless relay systems (WRS) over log-normal fading channels. The presented analytical models are used to estimate the end-to-end performance of the MBMH WRS with maximal ratio combining (MRC) and selection combining (SC) schemes. In particular, we derive closed-form expressions for the parameters of the end-to-end signal-to-noise ratio (SNR) of an AF multi-hop chain relay link. Further, we characterize the distribution of the end-to-end SNR and derive closed-form expressions for the mean and standard deviation of the end-to- end SNR's natural logarithm for AF MBMH WRS with MRC scheme, and the probability density function (pdf) for the end-to-end SNR of AF MBMH WRS with SC scheme. Then, under MRC and SC schemes, we analyze the diversity gain by adopting asymptotical relative diversity order (ARDO) and develop accurate analytical expressions for average bit error probability, outage probability, and ergodic capacity, respectively. Our analysis reveals that the computational complexity of the proposed models is acceptably low for practical applications. Numerical and Monte Carlo simulation results are presented to substantiate the accuracy of the proposed analytical models.
KW - Amplify-and-forward
KW - Average bit error probability
KW - Diversity gain
KW - Ergodic capacity
KW - Log-normal channel
KW - Multi-branch multi-hop wireless relay systems
KW - Signal-to-noise ratio
UR - http://www.scopus.com/inward/record.url?scp=84893740539&partnerID=8YFLogxK
U2 - 10.1109/TWC.2013.121813.130264
DO - 10.1109/TWC.2013.121813.130264
M3 - Article
AN - SCOPUS:84893740539
SN - 1536-1276
VL - 13
SP - 223
EP - 233
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 1
ER -