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Abstract : |
Multiple antennas can be used for increasing the amount of diversity or the number of degrees of freedom in wireless communication systems. In this paper, we propose the point of view that both types of gains can be simultaneously obtained for a given multiple antenna channel, but there is a fundamental tradeoff between how much of each any coding scheme can get. We give a simple characterization of this tradeoff and use it to evaluate the performance of existing multiple antenna schemes. 1, |
