TY - JOUR
T1 - Receive antenna array strategies in fading and interference
T2 - An outage probability comparison
AU - Romero-Jerez, Juan M.
AU - Goldsmith, Andrea J.
N1 - Funding Information:
Manuscript received September 15, 2006; revised June 22, 2007; accepted August 12, 2007. The associate editor coordinating the review of this paper and approving it for publication was S. Hanly. The work of J. M. Romero-Jerez was supported in part by the Spanish public Project TEC2006-12211-C02-01. The work of A. J. Goldsmith was supported by a grant from LG Electronics and the Korean Electronics Technology Institute. The material in this paper was presented in part at the 2007 IEEE International Conference on Communications, Glasgow, Scotland, June 2007.
PY - 2008/3
Y1 - 2008/3
N2 - We explore tradeoffs between different reception strategies of multiple receive antennas in fading channels with co-channel interference (CCI). Our tradeoff analysis is based on outage probability. We assume the signal from the desired user at the receive antenna array to be affected by Rice, Nakagami or Rayleigh fading, while CCI signals are assumed to experience Rayleigh fading. We provide closed-form analytical expressions for the outage probability of different diversity schemes, such as maximal ratio combining (MRC) and optimum combining (OC), and also for interference cancellation (IC) based on antenna beamsteering, which steers nulls in the array radiation pattern in the direction of the strongest interferers. Our analysis provides a unified framework for studying outage probability of different multiple-antenna reception strategies, and our closedform expressions are easily computed, facilitating a performance comparison under a range of operating conditions. Our numerical results show that IC yields significantly better performance than MRC if the system is interference-limited and the number of dominant interferers is lower than the number of receive antennas, or when the output SINR is low. In addition, when the background noise can be neglected, we provide numerical results for MRC and OC when the signals from the desired user at the different receive antennas are arbitrarily distributed.
AB - We explore tradeoffs between different reception strategies of multiple receive antennas in fading channels with co-channel interference (CCI). Our tradeoff analysis is based on outage probability. We assume the signal from the desired user at the receive antenna array to be affected by Rice, Nakagami or Rayleigh fading, while CCI signals are assumed to experience Rayleigh fading. We provide closed-form analytical expressions for the outage probability of different diversity schemes, such as maximal ratio combining (MRC) and optimum combining (OC), and also for interference cancellation (IC) based on antenna beamsteering, which steers nulls in the array radiation pattern in the direction of the strongest interferers. Our analysis provides a unified framework for studying outage probability of different multiple-antenna reception strategies, and our closedform expressions are easily computed, facilitating a performance comparison under a range of operating conditions. Our numerical results show that IC yields significantly better performance than MRC if the system is interference-limited and the number of dominant interferers is lower than the number of receive antennas, or when the output SINR is low. In addition, when the background noise can be neglected, we provide numerical results for MRC and OC when the signals from the desired user at the different receive antennas are arbitrarily distributed.
KW - Antenna array
KW - Beamsteering
KW - Diversity
KW - Interference cancellation
KW - Outage probability
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U2 - 10.1109/TWC.2008.060705
DO - 10.1109/TWC.2008.060705
M3 - Article
AN - SCOPUS:41149125365
SN - 1536-1276
VL - 7
SP - 920
EP - 932
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 3
M1 - 4472010
ER -