TY - JOUR
T1 - Cooperative diversity over log-normal fading channels
T2 - Performance analysis and optimization
AU - Safari, Majid
AU - Uysal, Murat
N1 - Funding Information:
Manuscript received April 12, 2007; revised October 19, 2007; accepted November 9, 2007. The associate editor coordinating the review of this paper and approving it for publication was J. Andrews. This paper was presented in part at the 10th Canadian Workshop on Information Theory (CWIT07), Edmonton, Alberta, Canada, June 2007. The work of M. Uysal is supported in part by a Natural Sciences and Engineering Research Council of Canada (NSERC) Special Research Opportunity Grant (SROPJ305821-05).
PY - 2008/5
Y1 - 2008/5
N2 - Although there has been a growing interest on cooperative diversity, the current literature is mainly limited to the results obtained for Rayleigh, Rician, or Nakagami fading channels. In this paper, we investigate the performance of cooperative diversity schemes over log-normal fading channels which provide an accurate channel model for indoor wireless environments. We focus on single-relay cooperative networks with amplify-and-forward relaying and consider three TDMA-based cooperation protocols which correspond to distributed implementations of MIMO (multi-input multi-output), SIMO (single-input multi-output), and MISO (multi-input single-output) schemes. For each protocol under consideration, we derive upper bounds on pairwise error probability over log-normal channels and quantify the diversity advantages. Based on the minimization of a union bound on the bit error rate performance, we further formulate optimal power allocation schemes which demonstrate significant performance gains over their counterparts with equal power allocation.
AB - Although there has been a growing interest on cooperative diversity, the current literature is mainly limited to the results obtained for Rayleigh, Rician, or Nakagami fading channels. In this paper, we investigate the performance of cooperative diversity schemes over log-normal fading channels which provide an accurate channel model for indoor wireless environments. We focus on single-relay cooperative networks with amplify-and-forward relaying and consider three TDMA-based cooperation protocols which correspond to distributed implementations of MIMO (multi-input multi-output), SIMO (single-input multi-output), and MISO (multi-input single-output) schemes. For each protocol under consideration, we derive upper bounds on pairwise error probability over log-normal channels and quantify the diversity advantages. Based on the minimization of a union bound on the bit error rate performance, we further formulate optimal power allocation schemes which demonstrate significant performance gains over their counterparts with equal power allocation.
KW - Cooperative diversity
KW - Distributed space-time codes
KW - Log-normal fading
KW - Pairwise error probability
KW - Power allocation
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U2 - 10.1109/TWC.2008.070393
DO - 10.1109/TWC.2008.070393
M3 - Article
AN - SCOPUS:47149083488
SN - 1536-1276
VL - 7
SP - 1963
EP - 1972
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 5
M1 - 4524293
ER -