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Summary: 1
Diversity Analysis of Single and Multiple
Beamforming
Ersin Sengul, Student Member, IEEE, Enis Akay, Student Member, IEEE, and Ender Ayanoglu, Fellow, IEEE
Abstract-- In this letter, we study two techniques known as
single and multiple beamforming to exploit the perfect channel
state information (CSI) available both at the transmitter and the
receiver of a multi-antenna wireless system. Assuming N and M
are the number of antennas at the transmitter and the receiver,
respectively, we show that single beamforming (transmission of
a single symbol from all transmit antennas at the same time,
employing the best subchannel) can achieve the maximum spatial
diversity order in the channel (NM). We extend our analytical
results to multiple beamforming (transmission of S symbols
simultaneously, S > 1) and calculate that the diversity order
achievable for this system is (N - S + 1)(M - S + 1).
Index Terms-- Beamforming, diversity, pairwise error proba-
bility, multi-input multi-output (MIMO) systems.
I. INTRODUCTION
IN recent years spatial diversity techniques are under inves-
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